Brunata

Brunata
Technical Manual for HGQ and HGS-series
– Volume, Flow and Energy Meters
Copyright ® Brunata a/s 2006

Brunata HG meters
In 1999 Brunata took over HG International a/s, a modern
wholly Danish owned company focusing on the development
and production of electronic water and energy meters based
on the magnetic induction metering principle. Thanks to an
unswerving commitment to new technology we today supply
some of the most advanced, reliable and accurate meters on
the market.
Since production began in 1953 the HG meters have undergone
a considerable transformation. They have changed from being
mechanical to fully electronic devices without a single moving
part. The electronics have become increasingly compact, and
the functionality has expanded enormously. Today’s meters
are like small computers, with all the software contained on a
single integrated circuit.
Today, our range of products includes meters for hot and cold
water and for energy metering in heating and cooling systems.
We offer on of the widest selections of meters on the market,
covering capacities from 1 l/h to 660 m 3 /h.
The Brunata Group
Brunata is a wholly Danish owned production and engineering
company with approx. 400 employees that develops and manufactures
mechanical and electronic equipment for the metering
of heat and water and that also prepares the associated billing.
In Denmark, Brunata has its head office in the outskirts
of Copenhagen and is represented nationwide through local
branches. Furthermore, the company exports to most European
countries through subsidiaries and license partners.
UK-QB 10.1481/11.04.2006
Brunata a/s · Vesterlundvej 14 · DK-2730 Herlev · Phone +45 77 77 70 00 · Fax +45 77 77 70 01
www.brunata.dk · brunata@brunata.dk
Page of 32 Copyright ® Brunata a/s 2006

Table of contents
1. Introduction......................................................... 4
2. Reference documents........................................... 4
2.1 Nomenclature list............................................ 4
2.1.1 Temperatures....................................... 4
2.1.2 Flow-rates............................................ 4
2.1.3 Miscellaneous ..................................... 4
2.2 List of appendixes........................................... 5
3. General Description.............................................. 5
3.1 HGQ / HGS Volume Meter.............................. 5
3.2 HGQ / HGS Heat and Cooling Energy Meter... 6
3.2.1 HGS-IV integration unit....................... 7
3.3 Flow sensors................................................... 7
3.4 HGQ / HGS Electronics.................................... 7
3.5 Temperature sensors....................................... 7
3.5.1 Direct sensors...................................... 7
3.5.2 Pocket sensors with fixed cable............ 7
3.5.3 Head sensors....................................... 8
3.6 Type approvals................................................ 8
3.7 Accuracy......................................................... 8
3.7.1 The total MPE ..................................... 8
3.7.2 MPE for subassemblies........................ 8
3.8 Types and versions.......................................... 8
4. Operating principles .......................................... 10
4.1 Operating principles for HGQ/HGS meters.... 10
4.2 HGS-IV integration unit............................... 10
4.3 Volume measuring........................................ 10
4.4 Temperature measuring................................ 10
4.5 Energy calculation......................................... 10
4.6 Menu structure and description.....................11
4.7 Display functions...........................................11
4.8 Accounting dates.......................................... 13
4.9 Tariff function .............................................. 14
4.10 Back light ............................................... 14
4.11 Mean value algorithm............................. 14
4.12 Reset function......................................... 14
4.13 Flow rates above q s
................................. 14
4.14 Flow rates below q i
................................. 15
4.15 Back-up battery....................................... 15
4.15.1 Battery Function................................. 15
4.15.2 Change of battery.............................. 15
4.16 Info and error codes................................ 15
4.17 Stored data and recovery........................ 16
5. Dimensions........................................................ 16
5.1 Flow sensors................................................. 16
5.1.1 HGQ.................................................. 16
5.1.2 HGS................................................... 16
5.2 Electronics................................................... 17
5.2.1 standard............................................ 17
5.2.2 OEM-version..................................... 17
5.3 Temperature sensors..................................... 17
5.3.1 Direct sensors DS................................. 17
5.3.2 Pocket sensors PS with fixed cable ...... 17
5.3.3 Head sensors....................................... 18
6. Pressure ratings and .......................................... 18
7. Input / Output.................................................... 19
7.1 HGQ/HGS Standard electronics.................... 19
7.2 HGQ/HGS – 107 electronics.......................... 19
7.3 HGQ/HGS OEM electronics........................... 19
7.4 Pulse input specifications.............................. 19
7.4.1 Pulse Input (AUX1 & AUX2) - Connection.. 19
7.4.2 Description of the AUX input .............. 20
7.4.3 Prescaler.............................................. 20
7.5 Pulse output specifications............................ 21
7.5.1 Pulse Output - Connection
(Galvanic separated).......................... 22
7.5.2 Pulse Output - Connection (NOT galvanic
separated)................................. 22
7.5.3 Minimum Volume/Pulse value V p for q s... 22
7.5.4 Volume/flow pulse value ..................... 22
7.5.5 Max. measurable flow before limit ...... 23
8. Data communication.......................................... 26
8.1 Data protocol............................................... 26
8.1.1 M-Bus protocol.................................... 26
8.1.2 M-Bus telegram................................... 26
8.2 Addressing of communicationmodules ........ 26
8.3 RS232 module.............................................. 27
8.4 M-Bus module.............................................. 27
8.5 LON module................................................. 27
8.6 Analogue output device............................... 27
8.7 Communication modem .............................. 27
9. Test and adjustment........................................... 28
9.1 Displaying high resolution volume pulses...... 28
9.2 Verification................................................... 28
9.3 Calibration.................................................... 28
9.4 Zeroing of peak values.................................. 29
9.5 Clock adjustment.......................................... 29
10. Installation requirements.................................... 29
10.1 Installing the Flow Sensor........................ 29
10.2 Mounting and connections of
the electronic unit................................... 29
10.3 Temperature sensors............................... 29
10.4 Security seals........................................... 29
10.5 Starting up the meter.............................. 29
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page of 32

1. Introduction
This manual is intended for skilled technicians and accredited
laboratory personal.
The HGQ, HGS and HGS-IV Meters are designed as Volume
Meters (versions 107 – 178) and Energy Meters (versions
180 and 189) covering the flow range from 1.2 to 16 m 3 /h
and are able to measure accurate flow rates of liquids with
a conductivity > 20 μS/cm.
This manual covers the HGQ and HGS versions EG; i.e. hardware
version E and software version G.
HGS-IV is an integration unit designed for using an external
flowsensor.
HGQ and HGS meters are designed for measuring of thermal
heat energy in district heating and cooling systems or in the
industry. The HGQ series is designed especially for individual
one family houses and dwellings.
This manual applies to all versions, the term HGQ/HGS means
that HGQ as well as HGS and HGS-IV are covered.
2. Reference documents
2.1 Nomenclature list
Reference: EN 1434
2.1.1 Temperatures
Θ max
Θ min
∆Θ
The upper limit of the temperature range, q max
is the
highest temperature of the heat conveying liquid,
at which the heat meter shall function without the
Maximum Permissible Errors (MPE) being exceeded.
The lower limit of the temperature range, q min
is the
lowest temperature of the heat conveying liquid, at
which the heat meter shall function without the Maximum
Permissible Errors (MPE) being exceeded.
The temperature difference, ∆Θ, is the absolute value
of the difference between the temperatures of the
heat conveying liquid at the flow and return of the
heat-exchange circuit.
∆Θ max
The upper limit of the temperature difference, ∆Θ max
is the highest temperature difference, at which the
heat meter shall function within the upper limit of
thermal power without the Maximum Permissible
Errors (MPE) being exceeded.
∆Θ min
t F
t R
t L
t H
The lower limit of the temperature difference, ∆Θ min
is the lowest temperature difference, above which
the heat meter shall function within the upper limit
of thermal power without the Maximum Permissible
Errors (MPE) being exceeded.
Forward temperature, inlet
Return temperature, outlet
Temperature low is return temperature in heating systems
and forward temperature in cooling systems.
Temperature high is forward temperature in heating
systems and return temperature in cooling systems.
2.1.2 Flow-rates
q s
q p
q i
q
According to EN 1434 the upper limit of the flow-rate,
q s
, is the highest flow-rate, at which the meter shall
function for short periods (< 1h/day; < 200 h/year)
without the Maximum Permissible Errors (MPE) being
exceeded. HGQ/HGS meters have no period limitations.
The permanent flow-rate, q p
, is the highest flowrate,
at which the meter shall function continuously
without the Maximum Permissible Errors (MPE) being
exceeded.
The lower limit of the flow-rate, q i
, is the lowest flowrate,
above which the meter shall function for short
periods (< 1h/day; < 200 h/year) without the Maximum
Permissible Errors (MPE) being exceeded.
Current flow-rare
2.1.3 Miscellaneous
UK-QB 10.1481/11.04.2006
MPE
t on
t off
T
Maximum Permissible Error
Time of the conducting state of an opto coupler input
and output.
Time of the non-conducting state of an opto coupler
input and output.
Pulse period. T = t on
+ t off
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V p
v
k
BxRy
EC
Volume pulse value (litre/pulse)
The water volume flow velocity
The water heat coefficient (enthalpy) from heat
enthalpy table, ref. EN 1434.
Data bank x, Register y. Internal data, not accessible
by the user.
ErrorCode
2.2 List of appendixes
Following documents are enclosed as appendixes to this manual
A.1 Volume Meters:
A.1.1 Data sheet HGQ Volume Meter
A.1.2 Data sheet HGS Volume Meter
A.1.3 Data sheet HGQ/S OEM Flow Meter
A.1.4 Users manual for HGQ & HGS Volume Meters
A.1.5 Installation manual for HGQ Volume Meter
A.1.6 Installation manual for HGS Volume Meter
A.2 Energy meters:
A.2.1 Data sheet HGQ Energy Meter
A.2.2 Data sheet HGS Energy Meter
A.2.3 Users manual for HGQ/HGS Energy Meters
A.2.4 Display configuration HGQ/HGS Energy Meters
A.2.5 Installation manual for HGQ Energy Meters
A.2.6 Installation manual for HGS Energy Meters
A.3 Analogue Box
A.3.1 Data sheet HG Analogue Box
A.3.2 Installation Guide HG Analogue Box (HG-420)
A.4 Data sheet HG-LON module
A.5 Communication protocol
A.5.1 M-Bus protocol
A.5.2 M-Bus data sheet
A.6 Type Approvals
A.6.1 Volume meter: OIML certificate R75 TS 27.01-085
A.6.2 Volume meter: EN 1434 certificate TS 27.01-091
A.6.3 Energy meter: OIML R75 certificate TS 27.01-082
A.6.4 Energy meter: EN 1434 certificate TS 27.01-090
A.6.5 OEM volume meter: EN 1434 certificate TS 27.01-123
with extension
A.6.6 Integrator: EN 1434 certificate TS 27.01-132
3. General Description
HGQ/HGS series meters are divided into Volume meters and
Energy meters.
The meter consists of a Flow Sensor with polished stainless
steel electrodes and an advanced electronic unit for wall
mounting. The HGQ/HGS-meter has low-pressure loss and
contains no moving parts, which could be worn or choked
up. The meter is very robust and is unaffected by excess flow.
The Flow Sensor can be freely mounted horizontal, vertical
or as required as long as it is always full of water. There is no
need for straight length of pipe before or after the meter.
General
Accuracy OIML R75 Class 4 / EN 1434 Class 2
Approvals EN 1434/
OIML R75
Environmental Class
Dynamic range 1:250
Flow sensor
Connection
EN 1434 Class C
G¾B, G1B or G1¼B
TS 27.01-091/
TS 27.01-085
Liner HGQ: Ultrason S HGS5 & 9:
Polysulfone HGS16: PTFE
Tube
Special brass (CuZn36PbAs)
Flange
Mild steel (stainless steel on request)
Required conductivity > 1 mS/m [10μS/cm]
Electrodes AISI 316
Protection Class
IP54
Fluid temperature Tmax = 130 ºC
Pressure Class
PN16 (P max
= 16 bar abs.)
Electronics
Mains
230 VAC 50Hz or 24 VAC 50Hz
Power consumption
< 5 Watt
Pulse output
Yes
Analogue output
Optional
MBus-Protocol
Yes
RS232-Communikation
Yes
Pulse input (ext. meters) Yes max. 2
Local indication and
totalization 1)
Yes
Protection Class
IP44
1) For display version
3.1 HGQ / HGS Volume Meter
HG volume meters are designed to measure water flow and
act as volume meter for energy measurement in District Heating-
and cooling systems or in the industry. The flow sensor’s
temperature operating range covers from -10°C to +120°C
and measures cold or hot water with same accuracy.
Following volume meter versions works with the whole
range of flow sensors:
• Version -174 is complete volume meters with display
and remote reading options showing peak values,
actual flow rates etc. The meter has pulse output and
room for insertion of a communication module. As
option storage facilities and pulse counter for other
meters.
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3.2 HGQ / HGS Heat and Cooling Energy
Meter
HGQ Volume Meter
• Version -178 has same facilities as -174 and in addition
tariff functions as described in chapter 4.7 Tariff function.
• Version 107 is volume and flow meter with no display
with volume pulse output for other manufacturers heat
calculators. The measured volume output is provided as
galvanic isolated pulses, see chapter 1.5 Pulse output
specifications. The meter has pulse output and a pin
header for insertion of a communication module.
• Version 107S is a flow meter with no display and no
remote reading options made for OEM-customers.
The meter has a volume pulse output available only.
This version is supplied as “black box” and may also
be used in F4 casing with calculator from SVM North
Node AB (previous ABB Metering) in Sweden. Refer to
appendix A.1.4
HGQ Energy Meter
HGQ/HGS energy meters are designed for District Heating-
and Cooling systems, Building management system
and different industrial applications. The meter works with
the same flow sensor as the volume meter. The electronic
unit has connectors for temperature sensors and performs
the calculation and integration of volume and temperature
difference.
Thus all energy meters can be used for measuring energy
in heating or cooling systems. One version (-185) measures
heating and cooling alternating in the same piping.
Following energy meter versions works with the whole range
of flow sensors:
• Version -180 is designed for energy metering in flats
with horisontal piping and other small applications. It
comes only as HGQ and has standard 2 AUX-inputs for
pulses from other meters for instance electricity, gas, or
water meters.
• Version -182 is the basic version for normal applications.
The version has remote reading options, pulse
UK-QB 10.1481/11.04.2006
HGS Volume Meter
HGS Energy Meter
Page of 32 Copyright ® Brunata a/s 2006

output and room for insertion of a communication
module. As options also storage facilities and AUXinputs
for pulses from other meters.
• Version -184 has same facilities as -182 and in addition
peak values, actual flow rates etc.
• Version -188 has same facilities as -184 plus tariff functions
as described in chapter 4.9 Tariff function.
• Version -185 is the combined heat and cooling meter
where the measured heating and cooling energy are
registered in two different registers.
• In addition to the complete meters the HGS is made as
a heat calculator with pulse input from any flow meter,
version HGS-IV.
3.2.1 HGS-IV Integration unit
T h e H GS - I V i ntegrator
is designed and approved
for energy metering in district
heating, cooling and
other waterborne systems
when used together with an
approved and verified volume
meter. Advanced software
allows for the configuration of
a very broad measuring range,
see table.
HGS-IV
Normally, the integrator comes
with paired temperature sensors.
They can, however, be used
with all approved and verified temperature sensors of the type
Pt100 or Pt500.
The meter has a logically structured menu and every month
it records maximum values for flow, power and ∆t with information
about date and time. The advanced version offers an
extra tariff register allowing for summing up according to
time, flow, temperature or supplied energy. Further options
are: logging of historic data in the programmable menu,
pulse collection and display of consumption from other water
meters, district heating meters, electricity meters etc.
3.4 HGQ / HGS Electronics
The HGQ/HGS electronics is designed with the latest microprocessor
technology and has a built-in clock which is backed
up by a small long-life battery.
Taken as a whole, the HGQ/HGS meters features following
facilities:
• Surveillance and remote reading through serial data
bus, M-Bus protocol
• »Easy to read« LCD-Display with self-explained icons
• Display with back-light activated by the push button
• Service and error indications
• Visual indication of flow pulses
• In case of power dropouts all data are saved in an
EEPROM
• Self start: Automatic data and set up recovery from
EEPROM
• Allows input and storage of pulses from other meters,
such as electricity-, gas- and water meters. The pulses
are programmed to actual pulse value and showed as
real units in for instance kWh
• Programmable pulse output (litre/pulse)
• Saves peak and total values
• Saves all registered data at 24 accounting dates
selected by customer
3.5 Temperature sensors
HGQ/HGS energy meters are designed for 2-wired paired
platinum sensors Pt100 or Pt500 matched and paired. All
approved and verified temperature sensors can be used. A
platinum sensor is a resistant sensor with a nominal resistance
of 100 respectively 500 ohm at 0.00°C.
The Brunata HG sensors are Pt500 equipped with silicone
heat resistant cable manufactured according to EN 60751
(IEC 751) and EN 1434.
3.3 Flow sensors
The HGQ/HGS-meter works fully electronic and has no
moving parts. The meter tube is made of a special copper
and zinc alloy lined with Ultrasone S, Polysulfone (PSU) and
PVDF. The measuring principle is based on Faraday’s magnetic
induction principle, where the water movement induces a
voltage across the electrodes. The Faraday principle is used
where high precision measuring of flow is needed.
The HGQ/HGS-meter has an extended measuring range
better than 1 to 250, which means that it can measure flow
velocity down to 0,4 % of the maximum flow.
The flow sensor’s temperature operating range covers from
-10 °C to +120 °C and measures cold or hot water with same
accuracy and shall always be kept together.
Attention:
The flow sensor cable must NOT be modified by any means.
The sensor with its cable is calibrated as one unit together
with the meter electronics. They share identical serial numbers.
Copyright ® Brunata a/s 2006
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3.5.1 Direct sensors
The direct sensor type DS is
designed for installation direct
in the water stream to ensure
fast response. The direct sensors
are approved according to
European standard EN 1434.
The direct sensors are standard
for HGQ energy meters,
with 1.5 m cable. Max cable
lenght is 8 m.
3.5.2 Pocket sensors with fixed cable
Pocket sensors can be
replaced without shutting
of the water. The pocket
sensors are standard for
HGS energy meters and are
deliverable in various length,
see table in chapter 11.3
Temperature sensors.
The pocket sensors are
approved according to Euro-
Fig 5: Direct sensors
Pocket sensors
UK-QB 10.1481/11.04.2006

pean standard EN 1434. The sensors with fixed cable are
supplied from 1.5 to 8 metres length.
3.5.3 Head sensors
The head sensors are designed
for industrial applications and
for installations where very
long cables are needed.
They are delivered with pocket
sensors in stainless steel and in
various lenghts
3.6 Type approvals
The HGQ/HGS meter series is designed and approved according
to European standard EN 1434 accuracy class 2, environmental
class C (industrial applications). The meters are also approved
according to the recommendation OIML R75. The approvals are
enclosed as appendixes to this manual comprising:
Approvals according to OIML R75 class 4
Head sensors
• Pattern approval certificate for HGQ and HGS volume
meter TS 27.01-085, rev. 2. Certificate no. 1999-7053-
1285, date 01.03.2002. Valid until 01.03.2010.
• Pattern approval certificate for HGQ and HGS heat
meter TS 27.01-082 rev. 2. Certificate no. 1999-7053-
1267 ate 01.03.2002. Valid until 01.03.2010.
3.7 Accuracy
The accuracy of a complete heat meter are calculated as function
of the temperature difference ratio (Δθ min
/Δθ) and the
flow rate ratio (q p
/q). The HGQ and HGS meters are designed
to fulfil the requirements of a class 2 meter according to the
European standard EN 1434. The manufacturing tolerance
lies normally within 60 % of the limits laid out in EN 1434.
3.7.1 The total MPE
The total MPE (Maximum Permissible Error) of a heat meter
is the arithmetic sum of the MPEs of the subassemblies flow
sensor (E f
), temperature sensors (E t
) and calculator (E c
).
MPE=E f
+ E t
+ E c
The total MPE of a volume meter is the arithmetic sum of
the MPEs of the subassemblies flow sensor (E f
) and calculator
(E c
).
MPE=E f
+ E c
3.7.2 MPE for subassemblies
Flow sensor
E f
= ± (2+0.02 q p
/q), max ±5%
Temperature sensors
E t
= ± (0.5 + 3 ΔΘ min
/ΔΘ)
Calculator
E c
= ± (0.5 + ΔΘ min
/ΔΘ)
UK-QB 10.1481/11.04.2006
Approvals according to EN 1434 class 2,
environmental class C
• Pattern approval certificate for HGQ and HGS volume
meter TS 27.01-091, rev. 2. Certificate no. 1999-7053-
1336, date 01.04.2001. Valid until 25.05.2009.
• Pattern approval certificate for HGQ and HGS volume
meter sub assembly (OEM version) without display TS
27.01-123, rev. 1. Certificate no. 1999-7053-1597,
date 01.04.2001.
Supplement No. 1 to TS 27.01.123, date 23.06.2003.
Valid until 01.04.2011.
• Pattern approval certificate for HGQ and HGS heat
meter sub assemblies (Calculator and Flow Sensor) TS
27.01-090 rev. 2. Certificate no. 1999-7053-1335 date
01.04.2001. Valid until 25.05.2009.
• Pattern approval certificate for HGS-IV integrator
TS27.01-132 certificate no. 2003-7053-1842 date
24.03.2003. Valid until 2005.
6
5
3
0
-3
EN1434 cl. 2
Factory tolerance
OIML R75
-5
-6
0.1% 1% 10% 100%
Accuracy according to EN 1434 class 2
3.8 Types and versions
HGQ and HGS meter has following type description and
ordering code.
xx: Meter type:
Q1: HGQ1
Q3: HGQ3
S5: HGS5
S9: HGS9
S16: HGS15
S-IV: HGS-IV
zz: Connection:
R0: G¾Bx110
R3: G1Bx130
R4: G1Bx190
R6: G1¼Bx260
none: HGS-IV
vvv: Menu/display:
180: Special meter for
flats
182: Standard heat
meter
184: Special meter with
peak values
185 Combined heat and
cooling meter
188: Meters with peak
values and tariff
functions
HGxx-zz-vvv/abcdef
a: Power supply:
1: 230 V AC
2: 24 V AC
b: Display backlight:
B: With backlight
-: No backlight
c: No. of External meters:
0, 1 or 2
d: Communication module:
M-Bus / LonWorks / RS232 /
- none
e: No. of accounting periods:
0 / 6 / 12 / 24
f: Programmed for glycol
G20: 20 % glycol
G25: 25 % glycol
G30: 30 % glycol
G35: 35 % glycol
G40: 40 % glycol
G50: 50 % glycol
Example:
HGS9-R4-184/1B2M24 is an energy meter with max flow 9
m³/h, connection sixe R1B x 190 mm, display version 184,
230 VAC connection, Display with back light, 2 pulse input,
inserted M-Bus module and 24 accounting periods.
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Meter type
Meter
type
Permanent
flow, q p
C Version
Voltage
Backlight
AUXmeters
Communication
Module
Accounting
periods
HG x yy zz vvv / a b c d e f
HGQ Q - - - - - - - - -
HGS S - - - - - - - - -
1.2 m 3 /h - 1 - - - - - - - -
3 m 3 /h - 3 - - - - - - - -
5 m 3 /h - 5 - - - - - - - -
9 m 3 /h - 9 - - - - - - - -
16 m 3 /h - 16 - - - - - - - -
G¾B x 110 - - R0 - - - - - - -
G¾B x 130 - - R1 - - - - - - -
G¾B x 165 - - R2 - - - - - - -
G1B x 130 - - R3 - - - - - - -
G1B x 190 - - R4 - - - - - - -
G1B x 220 - - R5 - - - - - - -
G 5 ⁄4 B x 260 - - R6 - - - - - - -
Volume meter without
display
- - - 107 - - - - - -
Volume meter OEM-version - - - 107S - - - - - -
Volume meter standard - - - 174 - - - - - -
Volume meter tariff - - - 178 - - - - - -
Energy meter basic version 1 - - - 180 - - - - - -
Energy meter basic version 2 - - - 182 - - - - - -
Energy meter standard
version
Combined meter heating/
cooling
- - - 184 - - - - - -
- - - 185 - - - - - -
Energy meter tariff version - - - 188 - - - - - -
Voltage supply 230 V AC - - - - 1 - - - - -
Voltage supply 24 V AC - - - - 2 - - - - -
No backlight in display - - - - - - - - - -
Backlight in display - - - - - B - - - -
Nos of external meters - - - - - - 0 - - -
Nos of external meters - - - - - - 1 - - -
Nos of external meters - - - - - - 2 - - -
Communication module
None
Communication module
M-Bus
Communication module RS
232
Communication module
LonWorks
- - - - - - - - - -
- - - - - - - M - -
- - - - - - - R - -
- - - - - - - L - -
Accounting periods - - - - - - - - 0 -
Accounting periods - - - - - - - - 6 -
Accounting periods - - - - - - - - 12 -
Accounting periods - - - - - - - - 24 -
Glycol percentage 5-50%
(increments of 5) f.inst. 30%
Glycol
%
- - - - - - - - - G30
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4. Operating principles
4.1 Operating principles for
HGQ/HGS Meters
Aux 1
Aux 2
Test pulse
Flowsensor
T forward
T return
/ Prescaler 1
/ Prescaler 2
A/D
Fast
pulse
T forward
T return
DT
Switch
Fast
pulse
x K V
Enthalpy
table
DV
K
DV
Energy DE
calculation
Database
(Sum
Peak
Tarif
etc.)
4.3 Volume measuring
The measuring principle of the HGQ/HGS-meter is based on
Faraday’s magnetic induction principle: When a conductor
passes through a magnetic field a voltage is induced. The
voltage is proportional to the velocity of the conductor. In
the HG-meter the water act as moving conductor.
The Digital Signal Processing circuit generates the magnetic
field in the Flow Sensor and the entire measurement is
synchronised with the mains 50 Hz. The magnetic field is
operated as a pulsating DC field, with every second field in
the negative direction to avoid DC offsets.
DT
The analogue section measures the flow and temperatures
and converts them to digital values. The flow is represented
as a fast pulse train (also used as test signal). The temperatures
and the difference DT between t H
and t L
is sent to the
enthalpy table. The energy for one measuring period (1.6 s)
is calculated and sent to the database (DE) where the energy
and flow is accumulated. The database section also handles
the AUX inputs, and the calculation of min, max, mean temperatures
etc.
The Digital Signal Processing communicates simultaneously
with HG’s service software (see chapt. 11), via the serial
connection Test / Cal. / Adj.
The serial data communication M-Bus / RS232 is handled by
the communication unit. All registers within the Data Base
Unit can be accessed via standard M-Bus protocol.
In case of a volume meter the temperature measurement
functions are omitted.
4.2 HGS-IV integration unit
The electronics and functions is the same as for HGQ / HGS,
except that the meter is configured to receive flowpulses from
an external flowsensor via AUX 1 input. See figure below.
Therefore the AUX 1 can not be used for pulse counting.
Reading of AUX 1 gives no meaning.
The meter can be configured to almost any pulse value via
two registers.
The first register specifies the pulse value in ml.
The magnetic field combined with the velocity of the water
flow generates a signal U out , which is received by the Analogue
Signal Processing. Subsequent to the analogue processing,
the signal will be digitised and additionally processed by
the Digital Signal Processing.
The Digital Signal Processing, which has been carried out
by the latest microprocessor technology, generates also the
signals used for calibration purposes.
4.4 Temperature measuring
The HGQ and HGS meters are designed for use of platinum
sensor with a nominal resistance of 100 or 500 ohm. The
sensors are matched in pairs by computer to ensure maximum
accuracy over the full measuring range.
The meter performs a temperature measurement at each
measuring period, meaning that the actual energy measurement
always is correct.
On the meter the values of forward and return temperatures
are shown in one picture and the temperature difference in
a separate picture with 2 decimals.
UK-QB 10.1481/11.04.2006
The second register specifies a multiplier raised to the power
of 10.
The pulse value can be in the range 1 ml to 1m 3 .
4.5 Energy calculation
The meter contains two volume registers. The first contains
the value of water registration used for energy calculation
and the second the total value. A comparison of the two
registers will show whether and for what volume the meter
has been out of order, due to for instance. manipulation or
faulty temperature sensors.
The energy is calculated according to the formula in EN 1434/
OIML R75, which simplified can be summed up as follows:
E = v x Δθ x k
v is the water volume flow velocity
Δθ is the mean value of difference between the flow and the
return temperature (t F
– t R
)
Page 10 of 32 Copyright ® Brunata a/s 2006

k is the water heat coefficient (enthalpy) from Dr. Stuck’s
table. Refer to EN 1434-1.
All current registers are automatically stored in EEPROM
during operation. In case of power failure the meter configures
itself during start up process.
4.6 Menu structure and description
While keeping the pushbutton pressed the display will run
sequentially through the different menus. There are 4 menus
available, they are indicated as 2, 3, 4 on the upper
display section, however menu#1 has no such indication.
4.7 Display functions
The HGQ/HGS meter has free programmable selection and
sequence of display. The display sequence of the HGQ/HGS
meter is fully flexible and the different displays can be placed
in any of the 4 menus. On a standard meter, however, the
displays are organised as follows:
User menu basic (no indication):
The most relevant information for the user such as accumulated
consumption, current error code, and elapsed
operating hours.
User menu extended [2]:
Other user information such as temperatures, peak values,
tariff consumption, actual flow and power etc.
File menu [3]:
Stored data, maximum 24 accounting periods. All registered
data including mean values but not current values such as
actual flow.
Service menu [4]:
Service information such as display test, clock, pulse values,
communication address, serial no etc.
In the following the different displays are illustrated. Above
each display you’ll find the relevant menu for standard
meters. Displays designed for an energy meter are not
applied on a volume meter, and some versions have a limited
number of displays.
1 Error message with
error code
When the desired menu icon is displayed just release the
button and the chosen menu will be active. In order to
monitor the associated displays in this particular menu you
click the pushbutton once repeatedly.
A double click is only used when displaying the historic menu
in order to switch to the following data set of the accounting
date. Refer to chapter 4.8 Accounting dates.
3 1
2
2 Accumulated energy
consumption [MWh]
3 Accumulated volume
consumption [m³ ]
used for integration of
energy consumption
4 Accumulated volume
consumption [m³] registered
by flow sensor
5 Operating hours [h]
6 Accumulated error
time in hours [h]
1 Menu number
2 Unit
5
6
4
3 Accounting period number with stored data
4 Decimal point and frame indicating decimal fraction
5 numerical value
6 Indicates cooling mode on combined heating and
cooling meters
7 Flow and return temperatures
[°C] Standard
energy meter
Cooling mode on
combined heating and
cooling meter
8 Temperature difference
[°C]
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 11 of 32

9 Actual power [kW]
10 Actual flow [m³/h]
11 Actual date and time
[date is June 13, 2003
and time is between
10 and 11 hours]
12 Latest error code and
date/time it occurred
13 Highest peak flow [m³/
h] in current accounting
period with date/time
it occurred
14 Highest peak power
[ k W ] i n c u r r e n t
accounting period with
date/time it occurred
15 Highest tempera -
ture difference [°C]
in current accounting
period with date/time
it occurred
20 Display for customer
code. Default setting
is Brunata HG.
21 Accumulated tariff
energy consumption
[$ + MWh]
22 Accumulated tariff
volume consumption
[$ + m³]
23 Criteria for tariff and
special setting
• Tariff based on minimum
temperature difference
[↓+ ∆t + $ + °C]
• Tariff based on a period
during the day [+ $]
• Tariff based on maximum
return temperature
[↑ + t L
+ $ + °C]
• Tariff based on maximum
power level [↑+
$ + kW]
• Tariff based on maximum
flow level [↑+ $
+ m³/h]
• Tariff based on energy
calculation having an
fixed return temperature
• Cooling mode on
combined heating and
cooling meter [COOL +
$ + °C]
16 Highest return temperature
in heating
systems [°C] in current
accounting period
and the corresponding
flow temperature with
date/time it occurred
17 Mean temperature difference
[°C] in current
accounting period
18 The meters manufacturing
(serial) number.
24 Display test
25 External meter no. 1 [in
this example programmed
as m³]
26 External meter no. 2
[ in this example programmed
as kWh]
27 Glycol-% on a glycol
heat meter
UK-QB 10.1481/11.04.2006
19 C o m m u n i c a t i o n
address. Default setting
is last 2 digits in
serial number.
28 Flow sensor position
• Flow sensor in pipe with
lowest temperature [FS
+ t L
] meaning return
pipe in heating installations
and flow pipe in
cooling systems
Page 12 of 32 Copyright ® Brunata a/s 2006

• Flow sensor in pipe
with highest temperature
[FS + t H
] meaning
flow pipe in heating
installations and return
pipe in cooling systems
29 Latest error code corrected
with date
30 Latest date/time the
meters has been read
remote
31 Programmed volume
pulse value [litres per
pulse]
32 Flow counter, only for
test purpose
33 Flow counter, only for
test purpose
34 A c c o u n t i n g d a t e
sequence
• Store data every day
[Fr. d01]
• Store data every
seven days [Fr. d07]
• Store data every
month [Fr. C1]
• Store data every quarter
[Fr. C3]
• Store data once a
year [Fr. C12]
60 Date and time for
stored data. First display
in all accounting
periods
Note:
The underlined display numbers indicate values stored in
File Menu.
4.8 Accounting dates
Storing of data at selected accounting dates means that you
always have the metered consumption available at the exact
accounting date even if the meter have not been read. The
user can always go back and find the relevant information
in the storage of the meter (menu #3, file menu). Up to 24
accounting dates can be factory programmed. The storing of
data occurs always at midnight at 00:01 (can not be altered).
They can be seen on the display and are not accessible via
the remote readout function.
There are 4 modes the accounting dates can be (factory)
programmed:
• One selected day each month
• Two selected days each month
• Each x day
• Each x month
The contents and the sequence of this menu #3 depend on
the contents of menu #1, #2, and #4.
The data stored in File Menu (see chapter 4.7 Display functions)
are indicated by an underlined display number, like
14.
Tariff energy and tariff volume is registered only when the
programmed prerequisites are fulfilled. Refer to chapter 4.9
Tariff function.
The stored data menu will be empty and is displayed as
_ _._ _._ _._ _ until the first accounting date has passed.
In connection with the automatic remote readout the peak values
and mean temperature values in user menu#2 are reset.
35 Mean high temperature
[°C] in current
accounting period
36 Mean low temperature
[°C] in current
accounting period
37 Programmed mean
temperature information
[°C] stored in
accounting dates. In this
example: mean temperature
difference
38 Accumulated HF-pulses
from flow sensor
4.9 Tariff function
Refer to appendix User manuals.
The meter can be factory programmed to register energy and
volume in special (tariff-)registers, when certain conditions
and criteria are fulfilled:
• Code for tariff criteria
• Conditions for tariff registration
• Stop time for tariff criteria
Tarif criteria can be relected amongst the 7 different types,
see display no. 23 in chapter 4.7 Display functions.
In case the criteria is fulfilled normally energy and volume
are registered in the 2 tariff registers in the extended user
menu#2.
NB: The meter does NOT take summer/winter time into
account!
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 13 of 32

4.10 Back light
In order to make the meter display readable even under dark
light condition the meter is provided with a back light which
function can be factory programmed in 3 modes:
• No back light (standard)
• Automatic back light (standard)
• Back light on all the time (optional)
In automatic mode the back-light is lit, whenever the pushbutton
is pushed and extinguishes after one minute. Whenever an
error code is displayed the back-light will flash simultaneously.
4.11 Mean value algorithm
Calculation of mean temperatures:
The temperature is measured every 4.8 s and summed.
Every 10 minutes the mean value is calculates by dividing the
summed value by 125 (4.8s x 125 = 10 minutes). This value is
then summed in a register. The mean value displayed is based
on this register (value divided by number of accumulations),
and can only be reset by resetting the meter.
Thus: The mean temperatures are updated every 10 minutes.
The meter is factory programmed as to which one of the
three mean temperatures is to be displayed in the mean
temperature display. The register of the chosen display will
be stored on accounting dates and it will replace the mean
temperature difference. None of the two other mean temperature
readings are stored at the accounting date.
Mean temperature is registered in the format XXX.X – i.e.
one decimal – irrespective of any difference or the temperature
displayed.
Error Time 0 h
Flow 0,000 m 3 /h
Peak Flow, Date 01-01-1990 -
Flow, Time 00:00:00 -
Low Temp, Crsp. High Temp 73.37 °C
Peak
Low Temp, Date 28-05-2003 -
Low Temp, Time 11:43:00 -
Low Temperature 58.25 °C
Power 0,000 kW
Peak Power, Date 01-01-1990 -
Power, Time 00:00:00 -
Temp Diff 15.19 K
Peak Temp Diff, Date 28-05-2003 -
Temp Diff, Time 11:43:00 -
4.13 Flow rates above q s
When the flow rate exceeds 150 % of the permanent flow
q p
, the meter will constantly register 150 % (q s
= 1,5 q p
),
which means there is no stop or interferences at higher
flow rates.
1.2 x q p =q s
qp
q
Error
UK-QB 10.1481/11.04.2006
4.12 Reset function
A number of parameters can be reset.
• RESET is accomplished by the black push button while
the hardware lock jumper is removed. Beware of the
sealing!
• Push the button in exceed of 0.6 seconds and - while
still keeping the button pushed - mount the hardware
lock jumper.
• After the jumper has been mounted it is necessary
to keep the button pushed for at least additional 3
seconds to accomplish the desired RESET.
The following data are affected by the RESET:
• All peak and mean variables/times, which otherwise
are zeroet at the beginning of the closing dates
• Accumulated error time (B0R12)
• Latest error code (B0R0)
• If current error code register (B0R30) is empty – irrespective
a possible Power On error – the Time error
happened register (B0R29) would be reset.
• The table below shows an example of the RESET function
q i
0
q i
(q p /1000)
q s 200%qs 300%q s
When the flow rate enters the normal measurement range
again the meter again registers correct.
Note:
It is not possible to damage the Flow Sensor by overload!
4.14 Flow rates below q i
At very low flow rates
qp
0,25 q i
< q < q i
a special signal validation technique is used in order to eliminate
errors occur due to the unavoidable noise of the very
weak flow signal. Every sample is compared to the previous
one and only if there are 5 successive validated sample signals
the 5 measurements will be used for further processing and
registered as valid signals. This means that the meter does
not register faulty signals.
Qabs
Page 14 of 32 Copyright ® Brunata a/s 2006

4.15 Back-up battery
4.15.1 Battery Function
The meter is provided with a back up battery Lithium 3 V
type CR 2032 for:
• Date and time
• Data and meter set up
The meters microcontroller and its memory is supplied either
from the internal power supply (as long as the mains is supplied)
or the battery via couple of diodes.
In case of low battery a warning battery icon and an Error-
Code #5 is displayed. It is recommended to change the battery
soonest possible. The battery is in function only during
times, when the meter is NOT mains operated and has an
expected live time of at least 10 years.
Whenever the mains supply is connected (or in connection
with a battery renewal after a low battery state) a self-start
automatic data and set up recovery from EEPROM is established.
The ErrorCode #9 indicates the date and time failure.
In order to set the date and time a PC and a the HGQ/HGS
service program is needed.
The internal data back up to the EEPROM is accomplished daily
at 00:01. Refer to chapter 11 HGQ/HGS Service Program.
4.15.2 Change of battery
The Lithium battery may be changed by qualified personnel
only!
The battery MUST ALWAYS be changed with the mains connected
– otherwise the microcontroller reset will not function
properly, the meter will not work correct and the battery will
discharge very fast afterwards.
In order to get access to the battery the PCB has to be
unscrewed from the case and lifted up. With the mains supplied
(!) and the meter running, the battery can be pulled out
of the battery holder and can be replaced by a new one.
Do NOT use metallic tools in order to avoid short-circuiting
the battery during this process.
4.16 Info and error codes
Error handler: Running once every minute. Up to one minute
to clear the error code.
The last ten error events are accessible on the display.
Remote reading:
• HGQ/HGS Versions from EG: Remote reading: Via
M-Bus (EC) or LON (nvoErrorCode) the meter can
transmit two ErrorCode bytes showing the current
ErrorCode. The current error also can be shown in the
meter display together with its date and time stamp.
Be aware of the different ways these codes appear,
depending upon the mode of representation.
• Versions before EG: Via M-Bus (EC) or LON (nvoErrorCode
) the meter can read out an error code byte. This byte
contains the previous error code, while the current error
code and time/date appear in the meter display. The date
and time of the previous error appear from the M-bus
(EC) or LON (nvoError Code).
The error code can be compounded of more than one element,
meaning that it is possible to display several simultaneous
errors.
Example 1:
Display shows: ERROR 43
Current error with the following meaning: Error #4 and
error #3
Error codes:
0. No current errors
1. Interruption of Power Supply
2. No water pulses were detected within the last 24 hours
while the temperature difference was more than 20 °C
3. t H
temperature sensor failure
4. t L
temperature sensor failure
5. Low voltage of back-up battery
6. *Flow sensors magnet coil short circuit to ground or
disconnected
7. *Error in the meter configuration
8. *Negative Δt. Heat meter temperature sensors are
swapped (This error does not occur in cooling meters)
9. **The clock has not been set
*from version EG1, Error 6 does not occur when the H/W lock is open!
**from version EG2
The 9 bits interpretation of the 2 byte error code:
Example 2:
Read out via M-Bus (EC) or LON (nvoErrorCode): 12
This current error means: The decimal value 12 is the sum of
8 + 4, corresponding to the error codes 4 and 3. This is an
indication of the errors #4 and #3.
Some other examples of possible error codes presentation:
Decimal value
Errorcode element
Eksample:
Error #4 and #3
256 128 64 32 16 8 4 2 1
9 8 7 6 5 4 3 2 1
Display
43
SUM
LON
12
Error examples
Error codes 0 and 1 are not shown in the display.
Whenever an ErrorCode is displayed the back-light will flash
simultaneously.
Register
Bank 8
HGQ/HGS
Display
Errors
M-Bus
telegram
Decimal
values
0 - - - 0
80 Error 8 8 128 128
100 Error 9 9 256 256
110 Error 95 9 & 5 272 256+16
190 Error 985
9 & 8
& 5
400 256+128+16
A0 Error 86 8 & 6 160 128+32
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 15 of 32

4.17 Stored data and recovery
Whenever the mains supply is connected (or in connection
with a battery renewal after a low battery state) a self-start
automatic data and set up recovery from EEPROM is established.
The ErrorCode #9 indicates the date and time failure.
In order to set the date and clock a PC and a dedicated service
program is needed.
The internal data back up to the EEPROM is accomplished
daily at 00:01.
5. Dimensions
5.1 Flow sensors
5.1.1 HGQ
Type and maximum
flow
D Thread B1
B2
H
L
HGQ1
1,2m 3 /h
HGQ3
3m 3 /h
[mm]
[mm]
[mm]
[mm]
-R0-
110
-R1- 1) 15 G 3 / 4
B
130
-R2- 1) 165
42 60 79
-R3-
130
-R4- 20 G1B
190
-R5- 1) 220
1) with adaptor
5.1.2 HGS
Type and maximum flow D Thread L
HGS5
5m 3 /h
HGS9
9m 3 /h
HGS16
16m 3 /h
[mm]
-R4-
G1B 190
20
-R5- G1B 1) 220
-R6-
G1 1 / 4
B
25
R4-DN25 DN25 2)
260
R4-DN32 32 DN32 2)
R4-DN40 40 DN40 2) 300
UK-QB 10.1481/11.04.2006
R4-DN50 50 DN50 2) 270
1) With adapter
2) With flanged screwed on the meter
Page 16 of 32 Copyright ® Brunata a/s 2006

5.2 Electronics
5.2.1 Standard
HG
Q
Sensor
Thread
G
Diameter
D [mm]
Length
EL [mm]
Length
AL [m]
DS M10 x 1 Ø8.4 27.5 Max 8
Dimensions of DS-sensor
5.2.2 OEM-version
Cable
length
[metres]
Cable
dimension
[mm²]
Max
sensor
temp.
[°C]
Max
cable
temp.
[°C]
Max
temp.
diff.
[Kelvin]
Sensor
tip
material
Cable
material
70 mm
1.5
3.0
5.0
8.0
2 x 0.22 180 180 3-150
Stainless
steel
Silicon
Direct sensors DS
5.3.2 Pocket sensors PS with fixed cable
120 mm
Pocket sensors PS are standard for HGS meters with pocket
length 85 mm. One sensor is installed in flow pipe and the
other in return. For large pipes longer sensor pockets may
be applicable.
Dimensions, see sketch and table below
5.3 Temperature sensors
5.3.1 Direct sensors DS
Direct sensors DS are standard for HGQ meters where one
sensor is installed directly into the flow sensor and the second
sensor in the piping. The sensor tip is made in stainless steel
with in diameter 3.3 mm, see sketch and table below. For
installation in the piping adapter with thread R½ or R¾ is
supplied.
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 17 of 32

Sensor
Diameter
D [mm]
Length
EL
[mm]
Pocket
thread
[inch]
Length
AL [m]
Pocket
material
Pocket
length
[mm]
6. Pressure ratings and
flow ranges
PS Ø6 50 R½ Max 8
Brass
(standard)
Stainless
steel
(option)
60
85
120
210
kPa
100.0
HGQ1
HGQ3 HGS5 HGS9
HGS16
bar
1
Dimensions of PS-sensor
10.0
0.1
Cable
length
[metres]
1.5
3.0
5.0
8.0
Cable
dimension
[mm²]
5.3.3 Head sensors
Max
sensor
temp.
[°C]
Max
cable
temp.
[°C]
Max
temp.
diff.
[Kelvin]
2 x 0.22 180 180 3-150
Sensor
tip
material
Cable
material
Stainless
steel
Silicon
Pocket sensors PS
Pocket sensors without cable are use where longer cables as
8 metres are needed, or for special installation f.inst. where
more sensors are needed in one pipe.
Cable
length
[metres]
Cable
dimension
[mm²]
5 0.75
8 0.75
10 1.00
12 1.00
15 1.00
18 1.50
20 1.50
Cable material
Max. cable
temp.
[°C]
Silicone 175
25 1.50
Fig 19 Head temperature sensors without cable
1.0
0.1
0.01
1 10
3
Flow m /h 100
Pressure loss
The volume flow rate is a function of the flow velocity and the size
of the liner. That’s why the pressure losses for all e.g. HGQ1´s are
the same, regardless of the physical meter versions (see chapter
5.1 Flow sensors).
Meter
Minimum
flow
(q i )
[l/h]
Permanent
flow
(q p )
[m 3 /h]
Pressure
drop
at (q p )
[kPa]
Maximum
flow
(q s )
[m 3 /h]
Pressure
drop
at (q s )
[kPa]
HGQ1-RY-ZZ 4.8 1.2 19 1.5 35
HGQ3-RY-ZZ 12 3.0 23 3.6 35
HGS5-RY-ZZ 20 5.0 25 6.0 38
HGS9-RY-ZZ 36 9.0 25 10.8 38
HGS16-RY-ZZ 64 16.0 25 19.2 38
RY: Size R1, R2, R3, R4, R5 or R6 (see “dimensions”)
Flow ranges
Flow
Max. sensor Max. temp.
Pocket
sensor Material
temp. difference
dimensions
size
[°C] [Kelvin]
G½ x 85 mm DN 40-50 Stainless steel
G½ x 120 mm DN 65-100 AISI 316T 180 3-180
G½ x 210 mm DN 125-150
(1.4571)
Fig 20: Pockets for head sensors
UK-QB 10.1481/11.04.2006
Page 18 of 32 Copyright ® Brunata a/s 2006

7. Input / Output
7.1 HGQ/HGS Standard electronics
7.2 HGQ/HGS – 107 electronics
Same as above but without display, and pushbutton.
7.3 HGQ/HGS OEM electronics
Application of OEM electronics in a ABB Metering F4 case
14
13
12
11
5
3
6
10
Note:
The sensor cable must not be modified by any means. The
sensor with its cable is calibrated together with the meter
electronics. They share identical serial numbers.
Nr. Name Function / Specification
1 Flow Sensor Flow Sensor input
2
1) 2)
3
1) 2)
Pt. Forward
(High)
Pt. Return (Low)
The connection of Pt100/Pt500 temperature
sensor in the Flow pipe
The connection of Pt100/Pt500 temperature
sensor in the Return pipe
4 Mains 230 Volt +10 % -15 % 50 Hz
5 A1, B1 1. Serial communication connection
MBus
6 A2, B2 2. Serial communication connection
MBus parallel to A1, B1
7 Volume pulse
output
8
1) 2)
1
2
3
4
Energy pulse
output
9 1. Extern. pulse
input
10 2. Extern. pulse
input
Darlington opto coupler pulse output
max. 20 mA 28 Volt. (Refer to 6.4)
Darlington opto coupler pulse output
max. 20 mA 28 Volt. (Refer to 6.4)
1. Pulse input from external meter /
counter. (Refer to 6.5)
2. Pulse input from external meter /
counter. (Refer to 6.5)
11 +5V +5 Volt max. 5mA (for ext. calculator)
12 M52 Serial communication in use for configuration
and test
13 M57 High resolution volume output (see test
and adjustment)
14 2) Push button To step through the menus.
1) Only in use when configured as energy meters
2) Not available in -07 version
This also apply for the energy integrator HGS-IV
9
5 6 7 8
1
Note:
The sensor cable must not be modified by any means. The
sensor with its cable is calibrated together with the meter
electronics. They share identical serial numbers.
Nr. Name Function / Specification
1 M31: 230VAC Mains 230 Volt +10 % -15 % 50 Hz
2 M11 & M12:
Flow Sensor
Flow Sensor input
3 M52 Serial communication in use for configuration
and test
4 M51 Connection to calculator
5 M53 For external 3V Lithium battery
(optional)
6 M57 High resolution volume output (see
test and adjustment)
7 M54 Volume
pulse output
Single transistor opto coupler pulse
output max. 0.8 mA 28 Volt. Refer to
6.4. The OEM version is provided with
a single transistor opto coupler output
with a max. Von < 0.6V
7.4 Pulse input specifications
7.4.1 Pulse Input (AUX1 & AUX2) - Connection
Not applicable for the OEM version - no AUX inputs available.
HGQ/HGS has two (galvanic separated) opto coupler inputs:
+AUX1- and +AUX2-.
These are (opto coupler) diode inputs and the polarity of the
connections has to be observed.
4
7
2
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 19 of 32

+5V
Contact
100R
1 2
Active
external
source
+
-
+
AUX1
-
10K
+
10K
Potentialfree
pulse contact
+
AUX2
-
-
0V
AUX1 galvanic isolated. AUX2 not isolated
AUX1 galvanic isolated - AUX2 not isolated
V on
V off
> 2,5 Volt
< 0,9 Volt
+V max
< 48 Volt
t on
t off
> 50 ms
> 50 ms
Input specification
AUX inputs galvanic isolated
7.4.2 Description of the AUX input
The AUX1 & AUX2 inputs permit the registration of pulsebased
inputs from various signal sources such as volume,
flow, energy, time and others. The internal sampling timing
is 20 ms and pulses (t on
and t off
) as short as of 30 ms can
be registered.
These pulse count registrations are completely independent
of the normal registration from the flow sensor and are
visible on the display as AC1 and AC2 with 6 digits*) with
appropriate units or a non-unit »BLANK«.
UK-QB 10.1481/11.04.2006
AUX inputs not isolated
7.4.3 Prescaler
The prescalers of the AUX inputs are programmable according
to the different input source scale factors and the desired
display resolution. The prescaler setting is not available from
the display.
The prescaler (divider) setting determines how many input
pulses are necessary for a correct change of the last display
digit (LSD):
As an example you may have a volume signal source
with 2.5 litre /pulse and you may wish to display
the m 3 display with 3 decimals. This is not possible,
because the last digit of a 3 decimal display represents 1
litre. With the appropriate choice of 2 decimals the last digit
displays 10 litres and will change for every 4 pulses at the
input, i.e. the prescaler has to be 4.
The AUX registrations are also readable (rounded to 6 digits*)
via the communication port (M-Bus, LON etc), and will be
stored in the file menu.
Number of decimals: 0, 1, 2 and 3
Page 20 of 32 Copyright ® Brunata a/s 2006

Volume units: m 3
Flow units: m 3 /h
Energy units:
Time units:
Prescaler input divider:
GJ, MWh and kWh
hours
1 to 30,000 (Integers only).
0 = disabled
*) 999999 or 99999.9 or 9999.99 or 999.999. The position of the decimal
point can be chosen to be 1 2 or 3, where the pulse-factor (unit/pulse) has
to be considered. You may not choose 3 decimals at 0.25 litre/pulse, because
the last digit position correspondences to 0.1 litre/pulse. 0.25 litre/pulse
requires max. 2 decimals.
The normal display for energy and volume shows up to 9 digits
[999999999]. The following count will reset the internal register and
display to 0.
Prescaler examples:
In order to illustrate the prescaler function, let’s assume the
display is set to m 3 with 1 decimal and shows 102.4 m 3 .
The input pulse represents 0.01 litre/pulse.
The last decimal indicates 0.1 m 3 = 100 litres
To increment the display unit (= 1 m 3 ) there must appear
(1,000 litre) / (0.01 litre/pulse) = 100,000 pulses at the AUX
terminals.
However, the resolution of the display is 100 litres. Hence the
prescaler has to be: 100 litre / 0.01 litre/pulse = 10,000.
The low-resolution pulses are directly accessible by the user,
while the high-resolution pulses appear as an serial data
stream at the M57 connector. Refer to the chapter 9 Test
and adjustment for details. The accumulated high-resolution
pulses can be displayed.
HGQ/HGS Energy Meter has two (galvanic separated) opto
coupler outputs: -VOL+ and -ENERGY+ and the Volume
Meter only the -VOL+ terminal pair.
These are (opto coupler) transistor switch outputs and the
polarity of the connections must be observed. The standard
version has a Darlington, the OEM version a single phototransistor
output.
ON is defined to be a conducting transistor with a LOW
output.
+V
V on
GND
1,6s
T
ton
t off
Output pulse timing
Number of pulses
to increment the
display unit
Pulse factor
7.5 Pulse output specifications
For volume as well as energy consumption there are to types
of pulses inherent in the meter:
• High resolution pulses
• Low resolution pulses
Display
unit
Number of
decimals
on display
Choice
of prescaler
100,000 0.01 l m 3 1 10,000
100,000 0.01 l m 3 2 1,000
100,000 0.01 l m 3 3 100
40,000 0.025 l m 3 1 4,000
40,000 0.025 l m 3 2 400
40,000 0.025 l m 3 3 40
100,000 0.01 Wh kWh 1 10,000
100,000 0.01 Wh kWh 2 1,000
100,000 0.01 Wh kWh 3 100
10,000,000 0.1 Wh MWh 3 10,000
4,000,000 0.25 Wh MWh 3 4,000
100,000 0.01 kWh MWh 1 10,000
100,000 0.01 kWh MWh 2 1,000
100,000 0.01 kWh MWh 3 100
40,000 0.025 kWh MWh 1 4,000
100 0.01 kWh kWh 0 100
100 0.01 kWh kWh 1 10
40 0.025 kWh kWh 0 40
40 0.025 kWh kWh 1 4
10 0.1 kWh kWh 0 10
10 0.1 kWh kWh 1 1
Prescaler examples
STD
OEM
+V max
28 Volt
I max
20 mA 0.8mA
V on max
1,5 Volt 0.6V
Output specification
1. Tolerance of t on
: ± 5ms
2. t off
≥ t on
3. Pulse period T = t on
+ t off
4. t on min
= 20 ms (with increments of 20 ms)
T min
= 40 ms (with increments of 40 ms)
Output pulse timing
+V
Standard & 07
R=
+ V - 1.5
5 mA
Approx. R for
I = 5mA
R=
OEM
- V - 0.6
0.8 mA
Approx. R for
I = 0.8 mA
3V - 3 kΩ
5V 700 Ω 5.5 kΩ
10V 1.7 kΩ 11 kΩ
15V 2.7 kΩ 18 kΩ
20V 3.7 kΩ 25 kΩ
24V 4.5 kΩ 30 kΩ
28V 5.3 kΩ 35 kΩ
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 21 of 32

t on
and t off
are programmable in increments of 20 ms, i.e.
increments of T = 40 ms.
The volume/pulse factor V p
has to be set accordingly. Refer
to the following pages.
7.5.1 Pulse Output - Connection (Galvanic separated)
7.5.2 Pulse Output - Connection (NOT galvanic separated)
I
I
+
-VOL+
Terminal pair
+
-
-VOL+
Terminal pair
-
+V
Output galvanic isolated
Output NOT isolated
7.5.3 Minimum Volume/Pulse value V p for q s
HGQ1 HGQ3 HGS5 HGS9 HGS16
q p
m 3 /h 1.2 3 5 9 16
q s
litre/h 1,440 3,600 6,000 10,800 19,200
T = t on
+t off
Pulse period
[ms]
Minimum volume/pulse value V p
(litre/pulse)
For 1.2·q p
at a given pulse period
40 0.025 0.1 0.1 0.25 0.25
80 0.1 0.1 0.25 0.25 1
120 0.1 0.25 0.25 1 1
160 0.1 0.25 1 1 1
200 0.1 0.25 1 1 2.5
240 0.25 1 1 1 2.5
280 0.25 1 1 1 2.5
320 0.25 1 1 1 2.5
360 0.25 1 1 2.5 2.5
400 0.25 1 1 2.5 2.5
440 0.25 1 1 2.5 10
480 0.25 1 1 2.5 10
520 0.25 1 1 2.5 10
560 1 1 2.5 2.5 10
600 1 1 2.5 2.5 10
640 1 1 2.5 2.5 10
680 1 1 2.5 2.5 10
720 1 1 2.5 2.5 10
760 1 1 2.5 2.5 10
800 1 1 2.5 2.5 10
840 to 1,560 1 2.5 10 10 10
Connection of pulse output
7.5.4 Volume/flow pulse value
For other flow values - not covered by the table above - the
volume/pulse value V p
can be calculated:
• Choose a pulse length ton (20 ms ≤ t on
< 800 ms)
resulting in a pulse period of T = 2t on
= t on
+ t off
(40 ms
≤ T < 1.6 s)
• Maximum number of complete output pulse periods T
during the measurement period of 1.6s:
N=1.6 s/T
Get the integer N from this.
• Divide this integer N by 1.6 s and multiply by 3,600 s
in order to obtain the maximum number of complete
output pulse periods per hour:
M=3,600*N/1.6
• Now the minimum volume/pulse value V p
for a given
max. flow q s
can be calculated:
V p
= q s /M
• Choose the next possible higher volume/pulse value.
UK-QB 10.1481/11.04.2006
Example:
HGS16 (with a max. measurable flow of q s
= 1,2 * 16 m 3 /h
= 19.2 m 3 /h)
If you want to measure a max. flow of q max
=15 m 3 /h:
T = 280 ms
Page 22 of 32 Copyright ® Brunata a/s 2006

n = (1.6/0.28) = 5.7 pulses/measurement period
The integer of this is:
N = 5 and M = (5*3,600/1,6) = 11,250 complete pulse
periods per hour
V p
= (15,000/11,250) = 1.33 litre/pulse
The next possible higher value is V p act
= 2.5 litre/pulse has
to be chosen in order not to exceed the maximum possible
pulses/ hour of 11,250.
Recalculation of the actual pulse periods/hour:
M act
= (q s
/ V p
) = 15,000 litre/h /2.5 litre/pulse = 6,000 complete
pulse periods per hour
which (of course) is less than 11,250.
7.5.5 Max. measurable flow before limit
Refer to tables on following pages showing the dependency
of pulse period T, pulse value Vp and the associated maximum
flow where a limitation occurs.
During the measuring period of 1.6s a pulse train appears
with a pulse period T and a pulse value Vp (litre/pulse).
Whenever the pulse count times the pulse period time T
exceeds the measuring period, the maximum measurable
flow is exceeded and limited according to the table values.
Bold numbers indicate the absolute maximum flow of the
meter itself; the other ones show the limited flow due to the
choice of pulse period T and the litre/pulse scaling.
Example: HGQ1: 0.25 litre/pulse. Up to 520 ms the maximum
flow is the meters inherent maximum of 1440 litre/h.
For T>520 ms the max. measurable flow is limited to 563
litre/h.
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 23 of 32

HG meter type HGQ 1 HGQ 3 HGS 5 HGS 9 HGS 16 HGQ 1 HGQ 3 HGS 5 HGS 9 HGS 16
q p
l/h 1200 3000 5000 9000 16000 1200 3000 5000 9000 16000
1,2 x q p
1440 3600 6000 10800 19200 1440 3600 6000 10800 19200
T =t on
+t off
Pulse value = 0.01 liter/pulse Pulse value = 0.025 liter/pulse
[ms]
[l/h]
40 900 900 900 900 900 1440 2250 2250 2250 2250
80 450 450 450 450 450 1125 1125 1125 1125 1125
120 293 293 293 293 293 731 731 731 731 731
160 225 225 225 225 225 563 563 563 563 563
200 180 180 180 180 180 450 450 450 450 450
240 135 135 135 135 135 338 338 338 338 338
280 113 113 113 113 113 281 281 281 281 281
320 113 113 113 113 113 281 281 281 281 281
360 90 90 90 90 90 225 225 225 225 225
400 90 90 90 90 90 225 225 225 225 225
440 68 68 68 68 68 169 169 169 169 169
480 68 68 68 68 68 169 169 169 169 169
520 68 68 68 68 68 169 169 169 169 169
560 45 45 45 45 45 113 113 113 113 113
600 45 45 45 45 45 113 113 113 113 113
640 45 45 45 45 45 113 113 113 113 113
680 45 45 45 45 45 113 113 113 113 113
720 45 45 45 45 45 113 113 113 113 113
760 45 45 45 45 45 113 113 113 113 113
800 45 45 45 45 45 113 113 113 113 113
840 to 1560 23 23 23 23 23 56 56 56 56 56
HG meter type HGQ 1 HGQ 3 HGS 5 HGS 9 HGS 16 HGQ 1 HGQ 3 HGS 5 HGS 9 HGS 16
q p
l/h 1200 3000 5000 9000 16000 1200 3000 5000 9000 16000
1,2 x q p
1440 3600 6000 10800 19200 1440 3600 6000 10800 19200
T =t on
+t off
Pulse value = 0.1 liter/pulse Pulse value = 0.25 liter/pulse
[ms]
[l/h]
40 1440 3600 6000 9000 9000 1440 3600 6000 10800 19200
80 1440 3600 4500 4500 4500 1440 3600 6000 10800 11250
120 1440 2925 2925 2925 2925 1440 3600 6000 7313 7313
160 1440 2250 2250 2250 2250 1440 3600 5625 5625 5625
200 1440 1800 1800 1800 1800 1440 3600 4500 4500 4500
240 1350 1350 1350 1350 1350 1440 3375 3375 3375 3375
280 1125 1125 1125 1125 1125 1440 2813 2813 2813 2813
320 1125 1125 1125 1125 1125 1440 2813 2813 2813 2813
360 900 900 900 900 900 1440 2250 2250 2250 2250
400 900 900 900 900 900 1440 2250 2250 2250 2250
440 675 675 675 675 675 1440 1688 1688 1688 1688
480 675 675 675 675 675 1440 1688 1688 1688 1688
520 675 675 675 675 675 1440 1688 1688 1688 1688
560 450 450 450 450 450 1125 1125 1125 1125 1125
600 450 450 450 450 450 1125 1125 1125 1125 1125
640 450 450 450 450 450 1125 1125 1125 1125 1125
UK-QB 10.1481/11.04.2006
680 450 450 450 450 450 1125 1125 1125 1125 1125
720 450 450 450 450 450 1125 1125 1125 1125 1125
760 450 450 450 450 450 1125 1125 1125 1125 1125
800 450 450 450 450 450 1125 1125 1125 1125 1125
840 to 1560 225 225 225 225 225 563 563 563 563 563
Page 24 of 32 Copyright ® Brunata a/s 2006

HG meter type HGQ 1 HGQ 3 HGS 5 HGS 9 HGS 16 HGQ 1 HGQ 3 HGS 5 HGS 9 HGS 16
q p
l/h 1200 3000 5000 9000 16000 1200 3000 5000 9000 16000
1,2 x q p
1440 3600 6000 10800 19200 1440 3600 6000 10800 19200
T =t on
+t off
Pulse value = 1 liter/pulse Pulse value = 2.5 liter/pulse
[ms]
[l/h]
40 1440 3600 6000 10800 19200 1440 3600 6000 10800 19200
80 1440 3600 6000 10800 19200 1440 3600 6000 10800 19200
120 1440 3600 6000 10800 19200 1440 3600 6000 10800 19200
160 1440 3600 6000 10800 19200 1440 3600 6000 10800 19200
200 1440 3600 6000 10800 18000 1440 3600 6000 10800 19200
240 1440 3600 6000 10800 13500 1440 3600 6000 10800 19200
280 1440 3600 6000 10800 11250 1440 3600 6000 10800 19200
320 1440 3600 6000 10800 11250 1440 3600 6000 10800 19200
360 1440 3600 6000 9000 9000 1440 3600 6000 10800 19200
400 1440 3600 6000 9000 9000 1440 3600 6000 10800 19200
440 1440 3600 6000 6750 6750 1440 3600 6000 10800 16875
480 1440 3600 6000 6750 6750 1440 3600 6000 10800 16875
520 1440 3600 6000 6750 6750 1440 3600 6000 10800 16875
560 1440 3600 4500 4500 4500 1440 3600 6000 10800 11250
600 1440 3600 4500 4500 4500 1440 3600 6000 10800 11250
640 1440 3600 4500 4500 4500 1440 3600 6000 10800 11250
680 1440 3600 4500 4500 4500 1440 3600 6000 10800 11250
720 1440 3600 4500 4500 4500 1440 3600 6000 10800 11250
760 1440 3600 4500 4500 4500 1440 3600 6000 10800 11250
800 1440 3600 4500 4500 4500 1440 3600 6000 10800 11250
840 to 1560 1440 2250 2250 2250 2250 1440 3600 5625 5625 5625
HG meter
type
HGQ 1 HGQ 3 HGS 5 HGS 9 HGS 16
q p
l/h 1200 3000 5000 9000 16000
1,2 x q p
1440 3600 6000 10800 19200
T =t on
+t off
Pulse value >= 10 liter/pulse
[ms]
[l/h]
40 to 1560 1440 3600 6000 10800 19200
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 25 of 32

UK-QB 10.1481/11.04.2006
8. Data communication
8.1 Data protocol
8.1.1 M-Bus protocol
Remote reading of the meter data requires an appropriate
program, such as MCOM from SVM North Node AB (former
ABB Metering) in Sweden.
When using RS232 and M-Bus automatic remote reading
time can be programmed, while The LON- module has a fixed
readout interval of 20 seconds and cannot be altered.
In connection with the automatic remote readout the peak
values and mean temperature values in user menu#2 are
reset.
Communication modules within the calculator unit handle
the serial data communication with its hardware modules
M-Bus, RS232 and LON.
The available modules are small plug-in circuits on a pin
strip. The modules can be used in all Brunata volume and
energy meters. The modules are powered from the meter.
Essential registers within the calculator unit can be accessed
via standard M-Bus protocol, as specified in the European
standard EN 1434, part 3.
When reading the meter remote using RS232 or M-Bus the
exact time for the remote reading is registered and is readable
on the display.
8.1.2 M-Bus telegram
Example from HGQ acquired by the MCOM software version
2.91
14:21 22-05-2003:
Copenhagen Road 69 Bill Haley
Aux1 Hot Water 64 m 3
Aux2 Meter 725 KW/h
Average High Temperature 111.84 °C
Low Temperature 74.81 °C
Temperature Difference
36,98 K
Errors Error None
Error Code 0
Error Time
Identification Address 110
32,955 h
Error, Date 22-05-2003
Error, Time 11:24:00
Customer Data
Hardware Version 8
AVEDØRE
ID Copenhagen Road 69
Manufacturer ID
Meter ID 30000001
Name
Bill Haley
BHG
Software Version 58
Version 5
Peak Flow 2.092 m 3 /h
Flow, Date 07-03-2003
Flow, Time 15:13:00
Low Temp, Crsp. High Temp
86,23 °C
Low Temp, Date 14-03-2003
Low Temp, Time 09:34:00
Low Temperature 129.50 °C
Power
340.229 kW
Power, Date 14-03-2003
Power, Time 09:57:00
Temp Diff 139.43
Temp Diff, Date 14-03-2003
Temp Diff, Time 09:37:00
Readout Energy 3.176 GJ
K
Flow 0.838 m 3 /h
Power
35.356 kW
Volume 100,011.592 m 3
Volume (Flow Sensor)
11,767 m 3
Status Access Number 20
Position Heat: outlet
Tariff Energy 3.588 GJ
Tariff Criterium 1 2,500
Tariff Criterium 2 0
Tariff Type 1
Volume 161.316 m 3
Temperature Difference 37.01 K
High 111.80 °C
Low 74.76 °C
Time Date 22-05-2003
PC Date 22-05-2003
PC Time 14:20:25
Runtime 65,607 h
Time 14:13:00
8.2 Addressing of communication
modules
M-Bus primary and secondary addresses are programmed
according the M-Bus standard.
Primary M-Bus address is a numeric value between 1 and
250, default programmed as the last two digits in the serial
number (can be read on the side of the meter). If the serial
number ends with 00, the M-Bus primary address is 100.
On request the meter will be delivered with custom specified
primary M-Bus address. The user can not change the primary
M-Bus address. On meters with custom primary M-Bus
address the address will be displayed in menu 4.
Page 26 of 32 Copyright ® Brunata a/s 2006

Secondary M-Bus address is the 8-digit serial number, and is
factory programmed. The number can be read on the side
of the meter.
8.3 RS232 module
The Brunata RS232 module is
designed according to RS232
standard, thus a d-sub plug
can be connected directly into
a PC and the cable terminated
to the meter.
8.4 M-Bus module
The Mbus communication
module is a small Plug In
module, which is to be
mounted on a pin strip in all
Brunata volume and energy
meters. It is powered from
the meter.
RS232 Module
8.7 Communication
modem
To communicate using a
modem, the meter needs
the RS232 module installed.
Modems can be either for
PSTN, GSM, GPRS and IPmodem.
The modem shall
have support for 11-bit communication.
GSM Modem
Several modems can provide
support for either 10-bit or
11-bit communication. Each of these modems is factory
configured for default 10-bit communication. To configure a
local modem for 11-bit communication, consult the manual
for the modem.
The baudrate used in the meter is 2400 baud.
Mbus module
8.5 LON module
Refer to Appendix A.4 HGLON.
Using LON module the meter
can communicate according to
FTT10A standard used in for
example building automation
systems.
Using the LON-module for
communication the remote
reading occurs every 20
second and the display will
be updated accordingly each
20 second.
LON module
8.6 Analogue
output device
There are two converters
available:
For regulation purpose the
HG-F/I-420SD flow-to-current
converter can be used. This
converter uses a data output
in the flowmeter, and therefore
updates every 1.6 s.
HG Analogue Box
The HG-F/I-420 converter uses the pulse output in the meter,
and converts the pulse frequency to current. This converter
are recommended for the energy output, but should not be
used for regulation purpose hence the output are updated
more slowly.
Both converters are galvanic isolated, and contains an active
current source. Further information in appendix 3.
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 27 of 32

9. Test and adjustment
Reference conditions:
Fluid temperature: 20 ºC ± 5 K
Ambient temperature: 20 ºC ± 5 K
Warm Up time: 30 Minutes
High-resolution volume pulses:
• After a suitable volume e.g. 1. 5 or 10 litre’s, the accumulated
pulses is compared to the wanted number
of pulses. The OFFSET factor is adjusted with the
HG-STOOL*) program so that the number of pulses is
within the wanted accuracy. E.g. ±0.5 % equals 100 ±
0.5 pulses every 1.6 s.
J1
M57
M52
M52
M57
J1
9.1 Displaying high resolution volume
pulses
The high resolution pulses can be accumulated and shown
on the display, which is a very convenient feature during the
test and type approvals during the verification of the q min
accuracy and performance.
There is room for a maximum 9 digit display of 999.999.999
pulses. The next pulse will reset this counter register to 0. At
q max
this will this overrun occur after approx. 14 hours.
Simultaneously with this programmable function the summing
icon (water drop) is displayed
The summing register will be cleared at power on.
UK-QB 10.1481/11.04.2006
HGQ1 HGQ3 HGS5 HGS9 HGS16
Pulses / litre 46875 18750 11250 6250 3516,63
The five-pin connector M57 is a data output for high-resolution
volume pulses, which can be converted into real pulses
by means of the external HG High frequency Pulse converter.
The FH-Pulses have the following values:
These pulses trains are transmitted once every 1.60 seconds.
Adjustment of water flow:
• The flow is set to maximum permanent flow (q p
). This
makes the meter generate 25,000 pulses per 1.60 s.
• The GAIN factor is adjusted with the HG-STOOL*)
program so that the number of pulses is within the
wanted accuracy. E.g. ±0.5 % equals 25,000 ± 125
pulses per 1.6 s.
• The flow is set to minimum flow (q i
). This makes the
meter generate 100 pulses per 1.60 s.
9.2 Verification
Verification sealing:
Programming and communication terminal M52 or jumper
J1 is sealed with VOID -label.
After installation the meters in casing can be sealed through
the holes in the transparent lid and bottom. However, meters
delivered after June 2000 can be sealed and locked at the
same time using a special plastic seal, which will brake when
the meter is opened.
9.3 Calibration
The resistance thermometers can be measured, paired and
certified at temperatures between 20 and 200 °C in any
accredited test laboratory.
Page 28 of 32 Copyright ® Brunata a/s 2006

9.4 Zeroing of peak values
Refer to chapter 4.10 Reset function
9.5 Clock adjustment
Refer to chapter 11 HGQ/HGS Service Program
10. Installation requirements
10.1 Installing the Flow Sensor
The flow sensor must be installed in the return pipe, unless it
is specified for the flow pipe, see data on the meter label. The
arrow on the flow sensor must point in the flow direction
The arrow on the flow sensor label must point in the flow direction.
There are no requirements regarding straight pipe sections
before or after the flow sensor, only the meter must always be
filled with water. Never insulate the housing of the flow sensor
10.2 Mounting and connections of the
electronic unit
The HGQ/HGS is a wall mounted piece of equipment, which
should be installed in suitable distance from the flow sensor
and in an indoor environment. Mount the unit an even surface
with 3 screws.
All connections to the meter must be installed before connecting
with power.
10.3 Temperature sensors
The two sensors are marked red and blue indicating high
and low temperature. The HGS energy meter is delivered
with pocket sensors, but it can also be delivered with sensors
for direct installation. HGQ energy meters come with direct
sensors, and they can be installed using a R½” connecting
piece, f.inst. in a T-piece.
When using pocket sensors a min. of 20mm of the pocket
must be placed in the middle of the water flow. To install
the sensors they are pushed into the pocket, and the cable
should be twisted backwards and forwards a few times to be
sure that the sensor goes down into teh bottom of the sensor
pocket. The terminal screw must be fastened completely and
hereafter slackened to the first slot opposite the hole of the
seal. By later dismounting of the sensor, the terminal screw
must be removed completely.
Sensor cables should not be fastened to neither cold nor
warm pipes.
10.4 Security seals
The electronic unit is sealed with VOID labels when delivered.
The box is closed and sealed with Brunata HG special
seal made of plastic, which is pushed into the narrow hole
on the bottom of the box. The seal can be removed with
a screwdriver. The broken piece of the seal is to be pushed
into the box with the screwdriver and hereafter the box can
be opened. Alternatively the box can be closed with the
enclosed screw and sealed with thread through the hole
next to the screw for the lid.
The flow sensor is sealed with thread through the hole in
the screwed connections and the same method is used for
the temperature sensors.
10.5 Starting up the meter
When the meter is connected to the mains for the first time
the display will always show ”Error 1”, as the meter has been
powerless during transportation. By pushing the button once
the error sign will disappear, and the meter is then ready. If
there is no water in the system the meter will not be damaged,
however it meter will register a random flow.
UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 29 of 32

UK-QB 10.1481/11.04.2006
Page 30 of 32 Copyright ® Brunata a/s 2006

UK-QB 10.1481/11.04.2006
Copyright ® Brunata a/s 2006
Page 31 of 32

UK-QB 10.1481/11.04.2006
Brunata a/s · Vesterlundvej 14 · DK-2730 Herlev · Phone +45 77 77 70 00 · Fax +45 77 77 70 01
www.brunata.dk · brunata@brunata.dk
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