Safety Rules
l Do not operate the Meter before the cabinet
has been closed and screwed safely as
terminal can carry voltage.
l Make sure before each measurement the
Meter is set to the suitable range.
l Before using the Meter, please inspect the
cabinet and test leads for damaged insulation
or exposed metal.
l Connect the red and black test lead to the
correct measuring input jack properly.
l Do not input values over the maximum
range of each measurement to avoid damages
of the Meter.
l The UNI-T UT50 series comply with
IEC 61010: in pollution degree 2,
overvoltage category (CAT I 1000V and
CAT II 600V) and double insulation.
Use the Meter only as specified in this
manual, otherwise the protection provided
by the Meter may be impaired.
l CAT I-For signal level, telecommunication,
electronic with small transient over voltage.
l CAT II -For local level, appliances, main
wall outlets, portable equipment.
l The meter is designed to withstand the
stated Max. voltages. If it’s not possible
to exclude without doubts that impulses,
transients, disturbance or for other reasons,
these voltages are exceeded a suitable
prescale (10:1) must be used.
l Do not turn the rotary function switch
during Voltage and Current measurement,
otherwise the Meter could be destroyed.
Model UT51-55: OPERATING MANUAL
2
