Insulation test MΩ alarm ON/OFF (MIT320/MIT330 only)
The buzzer can be enabled or disabled for working in office environments.
To enable the buzzer:
1. Switch the instrument to [SETUP].
2. Repeatedly press the [TEST] button until the display shows ON/OFF.
3. Press and hold the [TEST] button to select ON.
4. Press the
L
button to save.
To disable the buzzer:
1. Switch the instrument to [SETUP].
2. Repeatedly press the [TEST] button until the display shows RON/ON.
3. Press and hold the [TEST] button to select OFF.
4. Press the
L
button to save.
MΩ threshold adjustment (MIT320 and MIT3300 only)
The buzzer threshold adjustment allows the operator to set the resistance
above which the buzzer operates. The instrument will beep so long as the
insulation value measured remains above the threshold value.
The instrument is supplied with the threshold level set to OFF and the
threshold value set to 1.00 MΩ.
To adjust:
1. Switch the instrument to [SETUP]
2. Repeatedly press the [TEST] button until the display shows RES.
3. The initial insulation alarm level is set to 1.00 MΩ.
4. Press and hold down the [TEST] button. The Threshold limit will decrease
from 999 MΩ to 1.0 MΩ.
5. When the display reaches the desired value release the [TEST] button.
6. Press the
L
button to store the value.
The instrument will now beep every time an insulation test is
performed, and the measured value is greater than the threshold value
set. (only if buzzer is enabled)
Insulation test lock disable (Not MIT310A)
The instrument is shipped with the test lock function enabled. To disable
the test lock function:
1. Ensure the instrument is switched off.
2. Hold down the
L
button and turn the range knob to MΩ 500 V.
3. Keep the
L
button depressed for 10 seconds.
4. The instrument shall display OFF to indicate the lock function is
disabled.
This setting is permanently stored.
To re-enable the test lock function, repeat the above process.
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