Disable Lock Mode For Insulation And Continuity Tests - Extech Instruments MG325 User Manual

6.9.1 Disable Lock Mode for Insulation and Continuity Tests

To disable test lock mode and use manual test mode, press and hold the
lock icon switches off and then press and hold the TEST button for the duration of the test (TEST
will be displayed). Release the button to stop the test.
6.9.2 Insulation Resistance Test Timer
Please read and understand the sections on Insulation Resistance testing and Safety before
continuing.
The MG325 can run an Insulation test for an indefinite period by pressing the TEST button to
start/stop tests (Timer function OFF) or it can be programmed to run a test for a specific period of
time, 1~10 minutes (Timer function ON).
1. Short press the
when the timer is active).
2. The test time, while the Insulation Resistance test is running, is shown in the auxiliary display
in 'seconds' (s).
3. To set the test time, press and hold the SETUP button to enter the SETUP mode. Press
to step to the 2
between 1~10 minutes. Press
SETUP button to exit the SETUP mode. See SETUP mode section for additional details.
4. Now when Insulation tests are run, and the
automatically after the programmed test time has elapsed.
5. Press
6.9.3 Dielectric Absorption Ratio [DAR] Insulation Testing
Read and understand all operations and safety information in the Insulation Resistance
measurement and Safety sections before continuing.
1. Connect the meter to the device under test as shown in the Insulation Resistance test section
above.
2. Select the desired output test voltage using the rotary function switch.
3. Use the PI/DAR button to step to the first DAR test mode (60 seconds : 15 seconds ratio test)
or to the second DAR test mode (60 seconds : 30 seconds ratio test).
4. The display will show the DAR icon when the DAR mode is successfully accessed.
5. The test time ratio will show on the lower right.
6. Press the TEST button to start the test.
7. During the test the auxiliary display digits show the elapsed time, the voltage alert flashes on
the upper left, and the 'test voltage alert' LED will light.
8. The test will stop automatically after 60 seconds.
button to turn the test timer ON or OFF (the TIMER icon will display
nd
menu item (test time) and use the arrow buttons to select a test time
to turn this function off (TIMER display prompt will switch OFF).
to confirm the setting and then press and hold the
button is pressed, the tests will stop
13
button until the
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