User Manual

GMC-I Messtechnik GmbH 9
Safety Precautions
• Weak battery
If the “weak battery” icon appears in the battery level indicator,
it’s no longer permissible to perform safety-relevant measure-
ments. Furthermore, compliance with the listed specifications
is no longer assured in the case of a weak battery.
• Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.
• Make certain that the measurement cables are in flawless
condition, e.g. no damage to insulation, no interruptions in
cables or plugs etc.
• No measurements may be made with this instrument in
electrical 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.
• Measurements under moist ambient conditions are not
permitted.
• Be absolutely certain that the measuring ranges are not
overloaded beyond their allowable capacities. Limit values are
included in chapter 8, “Technical Data”, in the table entitled
“Measuring Functions and Measuring Ranges” in the “Over-
load Capacity” column.
• The multimeter may only be operated with installed batteries or
rechargeable batteries. Dangerous currents and voltages are
otherwise not indicated, and the instrument may be damaged.
• The instrument may not be operated if the fuse cover or the
battery compartment lid has been removed, or if its housing is
open.
• The input for the current measuring range is equipped with a
fuse link (exception: METRAHITAM BASE / B
ASE).
Maximum permissible voltage for the measuring circuit (= rated
voltage of the fuse) is 1000 V AC/DC.
Use specified fuses only (see page 59)! The fuse must have a
breaking capacity of at least 30 kA.
Opening of Equipment / Repair
The equipment may be opened only by authorized service per-
sonnel to ensure the safe and correct operation of the equipment
and to keep the warranty valid.
Even original spare parts may be installed only by authorized ser-
vice personnel.
In case the equipment was opened by unauthorized personnel,
no warranty regarding personal safety, measurement accuracy,
conformity with applicable safety measures or any consequential
damage is granted by the manufacturer.
Repair and Parts Replacement
When the instrument is opened, voltage conducting parts may be
exposed. The instrument must be disconnected from the measur-
ing circuit before the performance of repairs or the replacement of
parts. If repair of a live open instrument is required, it may only be
carried out by trained personnel who are familiar with the dangers
involved.