Proline Promass 83E/F/O Description of Device Functions - FMC ...
Proline Promass 83E/F/O Description of Device Functions - FMC ...
Proline Promass 83E/F/O Description of Device Functions - FMC ...
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7 Block OUTPUTS <strong>Device</strong> <strong>Functions</strong> <strong>Proline</strong> <strong>Promass</strong> 83<br />
Function description<br />
OUTPUTS CURRENT OUTPUT (1...3) CONFIGURATION<br />
MEASURING MODE<br />
(4004)<br />
Use this function to define the measuring mode for the current output.<br />
Options:<br />
STANDARD<br />
SYMMETRY<br />
PULSATING FLOW<br />
Factory setting:<br />
STANDARD<br />
<strong>Description</strong> <strong>of</strong> the individual options:<br />
• STANDARD<br />
The current output signal is proportional to the measured variable. The flow<br />
components outside the scaled measuring range (defined by the 0_4 mA VALUE m<br />
and the 20 mA VALUE n) are taken into account as follows for signal output.<br />
– If one <strong>of</strong> the values is defined as equal to the zero flow (e.g. VALUE 0_4 mA =<br />
0 kg/h), no message is given if this value is exceeded or not achieved and the<br />
current output retains its value (in example 4 mA).<br />
If the other value is exceeded or not achieved, the message “CURRENT OUTPUT<br />
AT FULL SCALE VALUE” appears and the current output responds in accordance<br />
with the parameter setting in the function FAILSAFE MODE (4006).<br />
– If both values defined are not equal to the zero flow (for example<br />
VALUE 0_4 mA = –5 kg/h, VALUE 20 mA = 10 kg/h), the message “CURRENT<br />
OUTPUT AT FULL SCALE VALUE” appears if the measuring range is exceeded or<br />
not achieved and the current output responds in accordance with the parameter<br />
settings in the function FAILSAFE MODE (4006).<br />
mA<br />
20<br />
4<br />
0<br />
➀<br />
➁<br />
Q<br />
A0001248<br />
• SYMMETRY<br />
The current output signal is independent <strong>of</strong> the direction <strong>of</strong> flow (absolute amount <strong>of</strong> the<br />
measured variable). The 0_4 mA VALUE m and the 20 mA VALUE n must have the<br />
same sign (+ or -). The “20 mA VALUE” o (e.g. backflow) corresponds to the mirrored<br />
20 mA VALUE n (e.g. flow).<br />
mA<br />
20<br />
4<br />
0<br />
➂ ➀ ➁<br />
Q<br />
A0001249<br />
! Note!<br />
• The direction <strong>of</strong> flow can be output via the configurable relay or status outputs.<br />
• SYMMETRY cannot be selected unless the values in the VALUE 0_4 mA (4002) and<br />
VALUE 20 mA (4003) functions have the same sign or one <strong>of</strong> the values is zero. If the<br />
values have different signs, SYMMETRY cannot be selected and an “ASSIGNMENT<br />
NOT POSSIBLE” message is displayed.<br />
(continued on next page)<br />
Page 68 • MN0M023<br />
Issue/Rev. 0.2 (12/12)