Calibration; Calibrating The Potentiometric Position Transmitter - ABB AV1 Operating Instructions Manual

POSITION TRANSMITTERS

CALIBRATION

Calibrating the Potentiometric Position Transmitter

AV23
AV33
AV44
AV____1__
AV____2__
CALIBRATION
A - 2
There are two procedures for calibration; one for the potentiomet-
ric option (Type AV
____
amp option (Type AV
____
This calibration example using the potentiometric position trans-
mitter can be used as a guide for other applications. Final calibra-
tion 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.
N O M EN C LAT U R E
AV 23? ????
AV 33? ????
AV 44? ????
AV ??? ?1??
AV ??? ?2??
Figure A-1. Terminal Block Connections
The nomenclature and terminal connections of Figure
The positive (+) and negative (-) connections at position TB1-4
and TB1-5 refer to the four to 20-milliamp signal to the I/P con-
verter.
Not applicable.
Not applicable.
Depicts the connections for the potentiometric position trans-
mitter option.
The positive (+) and negative (-) connections at position TB1-1
and TB1-2 refer to the output signal from the four to 20-milli-
amp 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.
1 ) and another for the four to 20-milli-
__
2 ).
__
T B1 C O N N E C T IO N S
1 2 3 4
+
+
+ –
+24
+ –
T 00 80 7 A
5
–
–
A-1 are: