1656 & 1657 Battery Element Tester Owner’s Manual
STS Instruments Page 77 of 88
10 Maintenance
Routine maintenance should include the following:
10.1 Functional Check
At least once per shift verify correct operation by the methods described in paragraph 3.4,
“Initial Setup Procedure” on page 21.
10.2 Safety Inspection
A. Daily – Check test leads for damage. Retracting probes should be inspected for
contamination or burning inside barrel by bringing the tips together in the retracted
position at full voltage. Clip type probes should be inspected for tears in the protective
boot. Leads should be inspected for cracks or deterioration. Front panel receptacle
should be inspected for excessive wear, cracks or loose components.
B. Monthly – Check line cord on tester for damage, deterioration and ground lead
integrity. Check line receptacle for ground integrity.
10.3 Annual Maintenance
Recommended Calibration interval for the 1656 and 1657 is one year. Contact STS Instruments
to request a calibration quotation.
Individual fuses are used to protect the different sections of the equipment. Failure of any of the
fuses is evidence either of fuse aging, abnormal line surges, or trouble in the unit.
The main AC line input fuse is on the rear panel. If a fuse is blown, replace with one of the same
type and rating. If the replacement holds, the original failure is probably due to aging or line
surges. If the replacement immediately blows, something is wrong and repairs are indicated.
Under no circumstances should oversize fuses be used in this equipment.
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