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Chapter 4
Maintenance
4.1
Overview
When performing scale calibration, it is a good practice to inspect the shaft coupling
for tightness. Also verify that the restraint arm is free to move. If arm has worn a slot
in the restraint stop and the restraint bar cannot float back and forth as well as
against the spring, corrections should be made.
4.2
Calibration
No adjustment or calibration of the device is necessary. Operating Temperature
range is -20º F to 130º F.
4.3
Troubleshooting
4.3.1
60-12C
1.
Place AC voltmeter across field terminals 15 and 16 of 60-12C speed sensor.
2.
With conveyor stopped, output should be 0.0 VAC.
3.
Start conveyor belt; output should be approximately 3 VAC.
4.
If no voltage is present, check the sensor with the wire from terminal 15 disconnected.
5.
If no voltage is present while running, repair or replace the speed sensor.
6.
If approximately 3 VAC is present, check field wiring.
4.3.2
60-12F or G
1.
Place a DC voltmeter across field terminals 17(+) and 16(-) of 60-12F or G speed
sensor.
2.
Depending on Model of scale integrator, reading should be 20, 24 or 30 VDC.
3.
If no voltage present, check at integrator terminals (see scale integrator manual).
4.
If voltage is present, check field wiring. If no voltage present, repair or replace
integrator.
5.
Place AC voltmeter across field terminals 15 and 16 of 60-12F speed sensor.
6.
With conveyor stopped, output should be 0.0 VAC.
7.
Start conveyor belt; output should be approximately 3 VAC.
8.
If no voltage is present, check the sensor with the wire from terminal 15 disconnected.
9.
If no voltage is present while running, repair or replace the speed sensor.
10. If approximately 3 VAC is present, check field wiring.
REC 3016 Rev M
17
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