Forch F73 Bedienungsanleitung Seite 64

1.1.3 Symbols:
Symbols used in this manual and on the instrument:
Caution: refer to the instruction manual. Incorrect use may result in damage to the device
or its components.
AC (Alternating Current)
DC (Direct Current)
Earth ground
Double insulated
Fuse
Conforms to European Union directives
1.1.4 Instructions
Remove test leads from the Meter before opening the Meter case or battery cover.
When servicing the Meter, use only specified replacement parts.
Before opening up the instrument, always disconnect from all sources of electric current
and make sure you are not charged with static electricity, which may destroy internal
components.
Any adjustment, maintenance or repair work carried out on the meter while it is live
should be carried out only by appropriately qualified personnel, after having taken into
account the instructions in this present manual.
A "qualified person" is someone who is familiar with the installation, construction and
operation of the equipment and the hazards involved. He is trained and authorized to
energize and de-energize circuits and equipment in accordance with established
practices.
When the instrument is opened up, remember that some internal capacitors can retain
a dangerous potential even after the instrument is switched off.
If any faults or abnormalities are observed, take the instrument out of service and ensure
that it cannot be used until it has been checked out.
If the meter is not going to be used for a long time, take out the battery and do not store
the meter in high temperature or high humidity environment.
1.2 1.2 Protection mechanisms
Fused by the fuse (FF400mA/1000V) during temperature, mA and hFE measurements.
A PTC resistor protects against permanent overvoltages of up to 250V during resistance,
Frequency, continuity and diode test measurements.