MG500-en-GB_v1.3 3/17
7
Operation
Powering the meter
Press the
ON
button to turn the unit on. Press the
OFF
button to turn the unit off. If the meter
does not switch ON please check that fresh ‘C’ 1.5V alkaline batteries are installed in the battery
compartment located at the bottom of the instrument.
Insulation Resistance Testing Procedure
Warning:
The circuit under test must
be completely
de-energized
and isolated before
making
test connections.
1.
After turning the unit on, make sure that the
Replace Battery
message is not displayed. If
the
Replace Battery
message is displayed replace the batteries before proceeding.
2.
The test voltage defaults to 2500V on power up. Select the desired test voltage using the
Voltage Adjust buttons (±500V) that step through the available test voltages in 500V
increments or by pressing one of the preset test voltage buttons (10kV, 5kV, 2.5kV, 1Kv).
3.
The display shows the
Connect Leads
prompt along with the selected test voltage value.
Connect the Green test lead to the Green test socket on the meter and then to the Ground
side of the insulator under test.
Connect the Red lead to the Red test socket on the meter and the Blue guard cable to the
blue socket on the meter. Connect the service end of the Red cable to other side of the
insulator under test.
If a Leakage Guard lead is required to collect surface leakage, connect the separate Blue test
lead into the Blue guard lead from the Red test lead which is plugged into the Blue test
socket on the meter and then clip the service end of the cable to the surface of the insulator
under test.
4.
Momentarily Press the
TEST START/STOP
button (1.5s
〜
3 seconds) to start testing.
For DAR or PI testing – refer to the separate test procedure below.
5.
The Insulation resistance test will complete in 5 seconds. The test voltage percentage
steadily counts down to zero during the test as can be seen on the display. The resistance
test result value will appear on the display when the test has completed.
6.
The HOLD icon will appear in place of the bargraph when the test is complete and after the
voltage has been discharged.
WARNING:
DO NOT REMOVE THE TEST LEADS BEFORE THE
HOLD
DISPLAY APPEARS.
7.
The meter automatically discharges the system at the end of the test.
8.
To take another test, press the
TEST START/STOP
button, the
Connect Leads
prompt should
appear on the display; the instrument is now ready to run a new test.
9.
The instrument automatically powers down after 5 minutes of inactivity.
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