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The overall operation of the detector must be checked by at least one of the
following procedures:
Press the TEST button or use an external verifier. The lamps must
flash.
WARNING
The test equipment must be held on the power
line for a minimum of 3 seconds.
Adjust the pole length to correspond to the system line-line
voltage. Touch the forked tip on a known live conductor at the
same voltage for
at least 3 seconds
. The lamps must flash.
A three-step procedure should be strictly observed when testing circuits:
1. Test the detector operation as described in the preceding
paragraph.
2. Test the unknown line for absence of voltage.
3. Test the detector again as described in the preceding paragraph.
In step 2, during a routine test on grounded systems, the presence of high
voltage in the detector's range causes the lamp to illuminate.
The LED detector is equipped with a telescopic pole which is marked with
a series of rings graduated in kilovolts, indicating the minimum safe length
required for each voltage range. These demarcations assist the user in
adjusting the pole to the exact length required by operating conditions.