Supply Voltage
■ Setting
The Counter may be connected to any AC
supply with a voltage rating of 90 to 265
Vrms, 45 to 440 Hz. The counter automatically
adjusts itself to the input line voltage.
The secondary supply voltages are electroni-
cally protected against overload or short cir-
cuit. The primary line voltage side is
protected by a fuse located on the power
supply unit. The fuse rating covers the full
voltage range. Consequently there is no need
for the user to replace the fuse under any
operating conditions, nor is it accessible from
the outside.
CAUTION: If this fuse is blown, it is likely
that the power supply is badly damaged.
Do not replace the fuse. Send the counter
to the local Service Center.
Removing the cover for repair, maintenance
and adjustment must be done by qualified
and trained personnel only, who are fully
aware of the hazards involved.
The warranty commitments are
rendered void if unauthorized access to
the interior of the instrument has taken
place during the given warranty period.
■ CNT-90 & CNT-90XL only
It is possible to run the counter from an op-
tional battery supply, Option 23/90.
You must charge the battery before use or
storage. The counter charges the battery
automatically when connected to line power
or an external DC source, whether the
instrument is in standby or turned on. See the
specifications for charging time in different
modes of operation.
Grounding faults in the line voltage supply
will make any instrument connected to it dan-
gerous. Before connecting any unit to the
power line, you must make sure that the pro-
tective ground functions correctly. Only then
can a unit be connected to the power line and
only by using a three-wire line cord. No other
method of grounding is permitted. Extension
cords must always have a protective ground
conductor.
CAUTION: If a unit is moved from a cold to
a warm environment, condensation may
cause a shock hazard. Ensure, therefore,
that the grounding requirements are
strictly met.
WARNING: Never interrupt the grounding
cord. Any interruption of the protective
ground connection inside or outside the
instrument or disconnection of the
protective ground terminal is likely to
make the instrument dangerous.
The counter can be operated in any position
desired. Make sure that the air flow through
the ventilation slots at the top, and side panels
is not obstructed. Leave 5 centimeters (2
inches) of space around the counter.
USER MANUAL ● CNT 9x Series ● Rev.22 February 2020
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