ABB AV2123000 Positioner User Manual

POSITION TRANSMITTERS
CALIBRATION
There are two procedures for calibration; one for the potentiometric
option (Type AV____1__) and another for the four to 20-milliamp
option (Type AV____2 __).
Calibrating the Potentiometric Position Transmitter
This calibration example using the potentiometric position transmitter
can be used as a guide for other applications. Final calibration
of the potentiometric position transmitter option depends on
the application. Field connections to the potentiometer are shown
on a label located inside the positioner cover. The label is shown
in Figure A-1.
TB1 CONNECTIONS
NOMENCLATURE
AV23?????
AV33?????
AV44?????
AV????1??
AV????2??
1 2 3
+ – +24
+ –
4 5
+ –
+ –
T00807A
Figure A-1. Terminal Block Connections
The nomenclature and terminal connections of Figure A-1 are:
AV23
AV33
AV44
AV____1__
AV____2__
The positive (+) and negative (-) connections at position TB1-4
and TB1-5 refer to the four to 20-milliamp signal to the I/P converter.
Not applicable.
Not applicable.
Depicts the connections for the potentiometric position transmitter
option.
The positive (+) and negative (-) connections at position TB1-1
and TB1-2 refer to the output signal from the four to 20-milliamp
position transmitter.
Direct acting cam rotation of zero to 100 percent produces
increasing resistance between terminal block TB1-1 and TB1-2.
Reverse acting cam rotation of zero to 100 percent produces
decreasing resistance between TB1-1 and TB1-2.
CALIBRATION
A - 2