MI 3202 GigaOhm 5 kV
Performing measurements
12
4 Performing measurements
4.1 Switching on the instrument
Auto-calibration
The instrument is switched ON by pressing the
ON/OFF
key. After turning on (
Fig. 7
),
the instrument first executes the auto-calibration (
Fig. 8
).
Note:
If batteries are defective or missing and the instrument is powered from mains supply,
the instrument could not be turn ON
Measuring test leads have to be disconnected during auto-calibration. If not the auto-
calibration procedure could be false.
After finishing the auto-calibration, the
pass icon
will appeared; the instrument goes to
the
Insulation Mode
(
Fig.9
) and is prepared for normal operation.
Auto-calibration prevents a reduction in accuracy when measuring very low currents. It
compensates the effects caused by ageing, temperature and humidity changes etc.
A new auto-calibration is recommended when the temperature changes by more than
5
C.
Fig. 7. First introduction
Fig. 8. Auto-calibration state
Fig. 9. Insulation Mode
Note:
If the instrument detects incorrect an state during the auto-calibration, the
fail icon
x
will be displayed:
Possible reasons for out of range conditions are excessive humidity, excessively high
temperature, etc. In this case it is possible to perform measurements by press
START/STOP button again but results could be out of technical specification.
Mains powered instrument operation
If you connect the instrument to the mains supply when the instrument is turned OFF,
internal charger will begin to charge the batteries but instrument will be remain turned
OFF. In upper left angle of LCD, flashing battery indicator will appear to indicate that the
batteries are charging.
