During Use - Forch F73 Bedienungsanleitung

Digital multimeter F73
ENG
This instrument complies with IEC 61010-1, CAT. III 1000V and CAT. IV 600V
overvoltage standards. See Specifications.
To get the best service from this instrument, read carefully this user's manual and
respect the detailed safety precautions.
International symbols used on the Meter and in this manual are explained in
chapter 1.1.3
1.1 Precautions safety measures
1.1.1 Preliminary
Measurement category III is for measurements performed in the building
installation.
NOTE: Examples are measurements on distribution boards, circuit-breakers,
wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the
fixed installation, and equipment for industrial use and some other equipment, for
example, stationary motors with permanent connection to the fixed installation.
Measurement category II is for measurements performed on circuits directly connected
to the low voltage installation.
NOTE: Examples are measurements on household appliances, portable tools and
similar equipment.
Measurement category I is for measurements performed on circuits not directly
connected to MAINS.
NOTE: Examples are measurements on circuits not derived from MAINS, and specially
protected (internal) MAINS derived circuits. In the latter case, transient stresses are
variable; for that reason, requires that the transient withstand capability of the equipment
is made known to the user.
When using this Multimeter, the user must observe all normal safety rules concerning:
- protection against the dangers of electric current.
- protection of the Multimeter against misuse.
For your own safety, only use the test probes supplied with the instrument. Before use,
check that they are in good condition.

1.1.2 During use

If the meter is used near noise generating equipment, be aware that display may become
unstable or indicate large errors.
Do not use the meter or test leads if they look damaged.
Use the meter only as specified in this manual; otherwise, the protection provided by the
meter may be impaired.
Use extreme caution when working around bare conductors or bus bars.
Do not operate the meter around explosive gas, vapor, or dust.
Verify a Meter's operation by measuring a known voltage. Do not use the Meter if it
operates abnormally. Protection may be impaired. When in doubt, have the Meter
serviced.
Uses the proper terminals, function, and range for your measurements.
When the range of the value to be measured is unknown, check that the range initially
set on the multimeter is the highest possible or, wherever possible, choose the auto-
ranging mode.