8 GMC-I Gossen-Metrawatt GmbH
• METRA HIT 23S has been optimized for measurements in
secondary current transformer circuits and has no inte-
grated fuse in the 16 A current circuit for reducing hazards in
the event of short circuits on the primary side.
In circuits with voltages involving contact hazards
METRA HIT 23S may only be used if the current circuit is
protected by a fuse or a circuit breaker with 20 A.
METRA HIT 23S must not be used for current measure-
ments in the 16 A current circuit (rotary swith „A“) in
application category III and IV.
Repair, Parts Replacement and Balancing
When the instrument is opened, voltage conducting parts
may be exposed. The instrument must be disconnected
from the measuring circuit for repair, replacement of parts
or balancing. If repair or balancing of a live, open instru-
ment is required, this may only be carried out by trained
personnel who are familiar with the dangers involved.
Errors and Extraordinary Strains
If it may be assumed that the instrument can no longer be
operated safely, it must be removed from service and
secured against unintentional use.
Safe operation can no longer be relied upon,
• if the instrument demonstrates visible damage,
• if the instrument no longer functions,
• after a long period of storage under unfavorable condi-
tions, (e.g. high humidity, dust or excessive temperature),
see "Ambient Conditions", page 53.
2 Initial Start-Up
Batteries
Please refer to chapter 25.1 regarding correct batteries
installation!
Attention!
!
Before opening the instrument, disconnect it from
the measuring circuit.
Switching the Instrument On Manually
➭ Press the ON key until the display disappears.
Activation is acknowledged with a brief acoustic signal.
As long as the key remains pressed, all segments of the
liquid crystal display (LCD) are active. The LCD is shown
on page 3.
After the key is released, the instrument is ready for
operation.
METRA HIT 22S: Press key until LCD appears.
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