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Gossen Metrawatt METRA HIT 27I Manual

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GMC-I Messtechnik GmbH 25
14 Maintenance
Attention!
!
Disconnect the instrument from the measuring circuit
before opening to replace storage batteries, batteries
or fuses!
14.1 Storage Batteries and Batteries
Warning!
The mains power battery charger may not be
connected if normal batteries have been installed
instead of storage batteries: Danger of explosion!
Removing the Storage Batteries During Periods of Non-Use
The integrated quartz clock draws power from the storage
batteries, even when the instrument is switched off. It is
advisable to remove the storage batteries during long periods
of non-use for this reason (e.g. vacation). This prevents
excessive depletion of the storage batteries, which may result
in damage under unfavorable conditions.
Checking Storage Battery Charge-Level and Condition
The current storage battery charge level can be queried in the
“Info” menu (see chapter 12 on page 17):
FUNC + ON|OFF  InF0 X.X V (bAtt).
Make sure that no storage battery leakage has occurred
before initial start-up, and after long periods of storage.
Continue to inspect the storage batteries for leakage at short,
regular intervals.
– If storage battery leakage has occurred, carefully and
completely clean electrolyte from the instrument with a
damp cloth, and replace the storage batteries before
using the instrument.
– If the “ ” symbol appears at the display, the storage
batteries should be replaced or recharged as soon as
possible. You can continue working with the instrument,
but reduced measuring accuracy may result. Depleted
storage batteries require approximately 20 hours
recharging time with the NA HIT 2x mains power battery
charger. Recharging starts as soon as the instrument is
connected to the mains power battery charger. If the
storage batteries have been excessively depleted, the
instrument cannot be switched on. If this is the case,
leave the (switched on) instrument connected to the
charger for approximately 30 minutes, and then proceed
as described above.
Attention!
!
Storage battery or battery leakage must be avoided.
Resulting damage is not covered by the guarantee.
Recharging the Storage Batteries
Use only the NA HIT 2x mains power battery charger (article
number Z218H) from GMC-I Messtechnik GmbH to recharge
the storage batteries in the instrument. This assures operator
safety by means of an extremely well insulated cable, and
safe electrical isolation (nominal secondary ratings: 5 V/
600 mA). The recharging time of the batteries (2,100 mAh) in
the instrument is approx. 20 h.
Before connecting the mains power battery charger to the
recharging jack, make sure that:
– Storage batteries have been installed (not normal batteries)
– The instrument has been disconnected from the measuring
circuit at all poles.
If possible, use the mains power battery charger only for
recharging storage batteries, not for measurements, in order
to avoid influence errors.
Replacing the Storage Batteries
Ð Set the instrument face down onto a flat working surface,
loosen the two screws at the back and lift off the housing
base, starting at the bottom. The housing top and
housing base are held together with the help of snap
hooks at the top front.
Ð Remove the storage batteries from the battery
compartment.
Ð Insert three 1.2 V NiMH storage batteries into the battery
compartment, making sure that the plus and minus poles
match up with the provided polarity symbols.
Ð Important for reassembly: First set the housing base onto
the housing top and align accurately (see photo below).
Then press the two housing halves together, first at the
bottom front (a), and then at the top front (b).
Ð Secure the housing base with the two screws.
Attention!
!
The instrument may not be operated if the housing
base has not been properly installed and secured!
(b) (a)
… 25 …


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