Hold Function; Zero Function - VOLTCRAFT ET-100 Mode D'emploi

- For a single measurement, hold down the TEST button (4) for the duration of the measurement. After a short
while, the insulation resistance is displayed along with the current auxiliary test voltage. Wait until the main
display has stabilised. This may take several seconds. Let go of the TEST button to stop measuring. The last
measured result is recorded ("HOLD" displayed) and the measuring circuit is discharged.
- For permanent measurement, press the LOCK button (2). The display shows "LOCK" and the lock symbol.
Press the TEST button (4) shortly to start the insulation test. Permanent measuring mode is active for about 10
minutes. Then the measuring device turns off automatically. If you want to end the measurement before that
time, press the TEST button. The last measured result is recorded ("HOLD" displayed) and the measuring circuit
is discharged.
- IF "OL" (overload) appears on the display, you have exceeded the measuring range or the measuring circuit is
highly resistive.
- After measuring, remove the measuring lines from the test object and switch off the measuring device.
f) HOLD function
The HOLD function locks the displayed value to allow you to read it comfortably or log it.
If you test live conductors, make sure that this function is deactivated when you start measuring.
Otherwise, a false measuring result is shown!
To activate the HOLD function, press the "HOLD" button (3). An audio signal confirms the activation and "HOLD"
appears on the display.
To deactivate the HOLD function, press the "HOLD" button again or switch to another measuring
function.

ZERO function

g)
The ZERO function is only active in the 400 Ω, 1000 V/DC and 750 V/AC measuring ranges.
The ZERO function allows zero adjustment of the display or a fast relative measurement, e.g. to display component
tolerances. The reference value is measured and saved in the internal memory and then automatically deducted
from subsequent measurements. This allows the easy display of deviations from the reference values.
- Connect the test object as described for resistance measurement or voltage measurement. Wait until the meas-
ured value has stabilised.
- Press the "ZERO" button (6) shortly while measuring. "ZERO" appears on the display and the display is reset to
zero. The reference value is saved.
- Continue with the differential measurements on the other test objects.
- Press the ZERO button again to deactivate the function.
After changing the measuring range or the measuring function, the ZERO memory is deleted.
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