rev. 08.15.2006.
5-41
5. Troubleshooting Guide
This troubleshooting guide is presented to assist in the recognition of any possible malfunctions, identification of
their probable causes, and correcting the problem. Refer to the Machine Tuning Sheet in the Appendix-A, when
making any adjustments to the machine. This is a general troubleshooting guide; therefore, some malfunction
conditions and/or corrective applications may not apply to your particular ST-LAB Electronic Torque Tester.
WARNING
1. Only qualified personnel should troubleshoot this machine.
2. All Personnel should stay clear of moving parts.
3. All guards and safety features must be replaced before
the machine is returned to service.
Failure to comply with these warnings may cause personal injury!
TABLE 5-1, Mechanical Troubleshooting Guide.
MALFUNCTION PROBABLE CAUSE
1. Unusually High Check clearance between the top, inside
Torque Reading: surface of the Collet’s relief cut counter bore,
and the top of the container/closure.
Assure that this clearance is from.06” to .012”
2. Unusually Low Check for rigidity of container clamps.
Torque Reading: Container MUST NOT Rotate!
TABLE 5-2, Electrical Troubleshooting Guide.
MALFUNCTION PROBABLE CAUSE CORRECTIVE ACTION
1. Sure Torque will a. No AC power to main panel a. Check power connections
not Power-up: b. Main AC fuse missing/blown b. Replace fuses
c. Main disconnect not in c. Turn disconnect to
“on” position “on” position.
d. “Power On” push-button faulty d. Replace push-button
2. Sure Torque will a. No AC power a. Check connections
not Start: and disconnect.
b. Control or main fuse blown/missing b. Replace fuses
c. Line voltage not within ±10% c. Install isolation X-former
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