Operation; Description Of Led Indicators; Use Of Test Probe Shrouds; Proving Check - Martindale Electric PC15250 Mk2 Instruction Manual

OPERATION

3.1 Description of LED Indicators

Correct phase
sequence of L1,
L2, L3 when
illuminated*
* Both phase sequence LED's are illuminated if a phase is missing.

3.2 Use of Test Probe Shrouds

The shrouds around the L1 and L2 test probes are normally sprung
forwards to IP 2X rating and are retractable.
For optimum safety, the shrouds should be allowed to spring forward
freely whenever the probe tips are removed from a location under test.
If desired, and before the unit is connected to any source of voltage, the
shrouds can be locked back by pushing and twisting 90°.
The probe tips will be exposed by 3 ± 0.5mm. In this position they are
GS38 compliant.

3.3 Proving Check

Before and after use, verify the unit is functioning correctly on a known
correctly sequenced 3-phase voltage source of 50V to 600V phase to
phase, and frequency of 40Hz to 60Hz.
L1 L2
PHASE
THREE LIT: CORRECT
ONE LIT: THAT PHASE FAULTY
L1
L2
L3
PHASE SEQUENCE
All phases present when all
three LED's illuminated
One LED illuminated
L3
indicates the respective
phase is missing
Incorrect phase
sequence of L1,
L1
L3
L3, L2 when
L2
illuminated*
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