Model 380360 Version 1.7 September 2003
5
Insulation Resistance Measurements (Megohmmeter Tests)
Warning
: Do not perform Insulation Resistance measurements if AC Voltage is present on the
device under test.
1. Connect the red test lead to the HI input terminal; black lead to the LO terminal.
2. Set the HOLD switch to the left off position and the MANU/LOCK switch to the
MANUAL position.
3. Set the rotary switch to the desired test voltage (250V, 500V,
or 1000V).
4. Connect the tips of the test leads to the equipment under test.
5. Press and hold the TEST button. Release the test button to
stop the test.
6. Read the measurement value on the LCD display.
3-Minute Test Lock
For hands-free operation, use the TEST LOCK feature.
1. Connect the red test lead to the HI input terminal; black lead
to the LO terminal
2. Set the rotary switch to the desired voltage test position
(250V, 500V, or 1000V).
3. Connect the tips of the test leads to the equipment under test.
4. Set the MANU/LOCK switch to the LOCK position.
5. Press and release the red TEST button. A 3-minute continuous test will begin. The
red TEST button can be pressed at any time to end the test. If the TEST button is not
pressed, the meter automatically stops the test after 3 minutes.
Notes on IR (Megohmeter) testing:
1.
The maximum measurement range for the 380360 is 2000M
Ω
(2G
Ω
). Frequently,
insulation resistance will exceed this value. When this happens, the display will
indicate 1
M
Ω
, meaning the resistance is very high and the insulation being tested
is good.
2.
If the device being tested is highly capacitive, the display will indicate an increasing
resistance value over time. Always wait until the reading has stabilized before
recording the value.