SKF AWAIV-12, User Manual

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Take care to keep the unit dry. This instrument should not be stored in any location where
water entry to the instrument can occur. Humidity will also affect the operation of the
instrument.
Checking test leads for broken sections
Either prior to using the instrument or at least once a month, each test lead should be
inspected for broken sections. If the tester has a broken lead, the instrument will not work
properly and give erroneous results. Within the first six inches from the tester panel, strain-
reliefs and 12–18 inches from the clips are the typical spots where the leads are broken.
There are two methods to check for breaks in the leads: a manual check and an overcurrent
trip test.
Manual break check
1) Inspect the lead wire for any cuts or nicks in the wire sheath.
2) Take the clip in one hand and grip the lead wire in the other had approximately 12–
18 inches from the clip.
3) Grip the lead wire approximately six inches from the strain relief on the tester.
4) Steadily, pull the lead. If the lead stretches, it is broken. If it does not have any give,
it is good.
Overcurrent trip test
The black ground lead is the most often broken lead. This is an easy test to verify if the black
lead is broken.
1) Connect all leads together (clip to clip) (three red, one black ground).
2) Place tester in either Meg-Ohm or DC HiPot mode. Initiate test.
3) If the tester immediately shows an overcurrent trip, the black test lead is good. If the
tester continues to ramp up to the test voltage, the black test lead is broken.
Open circuit test to verify tester operation
While doing periodic testing there are some instances that the tester will immediately trip
when first initiating testing. When this occurs, there is generally some question by the
operator if the motor is truly bad or if the tester is operating correctly. A simple open circuit
test verifies tester operation.
1) Unhook all leads from the motor being tested.
2) Place all leads some place safe: on the floor, over the edges of a plastic trash can, and
so on. Ensure that the test clips do not touch.
3) Place the black lead away from the red leads.
4) Initiate either a Meg-Ohm or a DC HiPot test.
5) If the tester is operating correctly, it will ramp up to the test voltage with minimal
leakage current and will not overcurrent trip. If the tester is not operating correctly, it
will overcurrent trip immediately like when it was attached to the motor.
6) If the tester is operating correctly, reconnect to the possible bad motor and retest. If
it is not operating correctly the service department for assistance.
186 SKF Static Motor Analyzer—Baker AWA-IV User Manual