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19
Operation
Making an insulation measurement
1. Set the left hand rotary range knob to the
500
V
insulation test voltage required. (The position of the right hand
rotary range knob must not be in the
position.)
2. Connect two test leads to the L1 (+ve ) and L2 (-ve) terminals on the instrument.
L1
L2
L3
N
E
3. To start test, press and hold either of the
TEST
buttons,
or
, on the instrument.
Release the test button after the displayed reading has settled. The circuit will now discharge safely.
Note:
A 1000 V warning is displayed whenever the 1000 V range is selected for the first time and the
TEST
button is pressed.
Insulation test lock
To lock an insulation test ON, hold down either of the
TEST
buttons followed by either of the RED LOCK
buttons.
To release the “Locked on” insulation test, press the
TEST
button.
Warnings:
• The test voltage will be permanently present on the test probes or crocodile clips when in the
locked position.
• Auto discharge - Auto discharge facility automatically and safely discharges the circuit at the
completion of an insulation test.
• Live circuit warning - operates when connected to live circuits > 25 V. Testing is still permitted.
• Test inhibited - Live circuits > 50 V will inhibit testing.
