GMC-I Messtechnik GmbH
27
6.6
Voltage Measurement
Notes Regarding Voltage Measurement
•
The multimeter may only be operated with installed rechargeable
batteries or mains module. Dangerous voltages are otherwise not
indicated, and the instrument may be damaged.
•
The multimeter may only be operated by persons who are
capable of recognizing
touch hazards
and taking the appropri-
ate safety precautions. Contact hazards exist anywhere,
where voltages of greater than 33 V (RMS) may occur.
The test probes may only be gripped up to the finger guard.
Do not touch the metallic test probes under any circumstances.
•
Avoid working alone when taking measurements which
involve
touch hazards
. Be certain that a second person is pres-
ent.
•
Maximum permissible voltage
between the V and
(ground) terminals is 1000 V for measur-
ing category III and 600 V for measuring category IV.
•
Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.
•
No measurements may be made with this instrument in elec-
trical circuits with corona discharge (high-voltage).
•
Special care is required when measurements are made in HF
electrical circuits. Dangerous pulsating voltages may be pres-
ent.
•
Be aware of the fact that dangerous voltage spikes are not displayed
during measurement with the low-pass filter.
We recommend measuring voltage without the low-pass filter first, in
order to be able to detect any dangerous voltages.
•
Be absolutely certain that the measuring ranges are not over-
loaded beyond their allowable capacities. Limit values are
included in chapter 8, “Characteristic Values”, in the table enti-
tled “Measuring Functions and Measuring Ranges” in the
“Overload Capacity” column.
Note
Rotary selector switch position “
RISO
” is available for the
detection of interference voltage during insulation resis-
tance measurement.
Use switch position V , V
or V in order to perform
precise voltage measurements.
