Potentiometric Position Transmitter Assembly (Exploded View - ABB AV3 Instruction Manual

T ER M IN AL
BL O C K TB 1
Figure A-3. Potentiometric Position Transmitter Assembly (Exploded View)
a. Remove the cam by removing the screw, flag, nut, and
washer (Fig. A-3).
b. Loosen the set screw on the hub of the small gear using a
⁄
-inch Allen wrench (Fig. A-3).
1
16
c. Use a screwdriver to adjust the shaft on the potentiometer
until the ohmmeter reads 200, ±20 ohms. While adjusting the
resistance, hold the gears and cam shaft stationary so rotation
does not occur. Only the potentiometer shaft should move while
adjusting the resistance.
POSITION TRANSMITTERS
F LAG
C A M
27
LA R G E G EA R
60
31
96 SM ALL G E AR
SE T SC R E W
92
95 M O U N T IN G BR AC KE T
PO T EN T IO M E TE R
21
) Ω
(2000
N OT E S :
1. S O M E H A R DW A R E IT EM S H AV E
B EE N O M IT T ED F O R C L A R IT Y.
2. ID E N T IF IE D IT E M S P E RTA IN TO
T H E P O S IT IO N T R A N S M ITT E R
O P T IO N O N LY.
T 00 78 8 A
CALIBRATION
A - 5