3B U17451 Instruction Sheet

U17451 Analog Multimeter
Instruction sheet
10/04 MC/ALF
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Handheld meter used to measure
current, voltage and resistance as
well as gain levels or attenuation e.g.
in chains of quadripoles.
1. Safety instructions
• Before using the analog multime-
ter, make sure you read the oper-
ating instructions carefully and
that you comply with them com-
pletely.
• The safety of the multimeter and
the person operating it can only
be guaranteed if it is used in ac-
cordance with the instructions. Do
not operate or handle this unit
incorrectly or inappropriately.
• The device may only be used by
persons, who are aware of the haz-
ards of contact (for voltages over
30 V rms) and can undertake the
appropriate safety precautions.
1 Rotary switch to select
measurement range
2 Rotary knob to set full-scale
deflection for 0 Ω
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3 Connection for voltage
measurement
4 Connection for current and
resistance measurement
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5 Connection for ground
6 Adjustment screw for
mechanical zero-point
setting
7 Nub to latch the housing
shut
This also includes the appearance
of unforeseen voltages e.g. in de-
fective units or charged capacitors.
• In the case of voltage and current
measurements the nominal volt-
age between the phase and neu-
tral conductor may not exceed 300
V according to CAT II (in circuits
that are directly connected to the
mains) and CAT III (in building wir-
ing installations) 300 V.
• The analog multimeter may not be
used for measurements in circuits
with corona discharge (high volt-
age).
• In measurements involving RF cir-
cuits special care must be taken
due to the existence of dangerous
hybrid voltages.
• The appropriate permissible mea-
surement range may not be ex-
ceeded. Always change from a
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