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3.5 Testing Considerations
The following considerations should be observed when using the
PSI4000 / PSI4300:
Incorrect phase live test indications will be obtained if two or
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three sensors are connected to the same phase. The L1, L2 and
L3 LED's will only illuminate simultaneously if the sensors are
connected to 3 separate phases, with phase to earth voltages ³ 75V.
Touching the sensor clips during testing may give incorrect test
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indications.
Incorrect test indications may be obtained if the sensor clips
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are attached near to a charged body or equipment generating
electromagnetic waves.
T he specified conductor size for testing is between 2.4mm and
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30mm diameter. Testing conductors outside of this range may
give incorrect test indications.
Test indications may be influenced by other nearby cables with
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a voltage magnitude that is double or greater than the voltage
magnitude of the cables being tested. The sensor clips should be
attached as far from such cables as possible.
Correct wiring status cannot be correctly identified when an earth
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line is connected between phases via delta connection. Check the
connection specification of the 3 phase distribution system being
tested.
Cannot be used to test bus bars or metal shielded cables.
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Do not pull the sensor clip wires to remove the sensor clips from the
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cables under test. This may break or damage the sensor clip wires.
3.6 Proving Check
Before and after use, prove the function of the PSI4000 / PSI4300
by performing steps 1 to 4 below:
1. Press the
up sequence, all of the LED's will illuminate briefly.
2. I f any of the LED's do not flash during the power-up sequence,
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do not use the instrument.
button to turn on the instrument. During the power
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