Operation Manual

26 GMC-I Messtechnik GmbH
Ð Illum: Press the Test key twice in order to activate and deactivate
display illumination.
Ð Display: Press the Test key after each test pattern appears in order to
check the display elements.
Ð Keytest: Perform the key test by pressing each of the softkeys once,
and by pressing the start key once in each of its three positions. The
keys appear filled in at the key pictograph after they have been tested.
Individual tests can be skipped by pressing the skip key before starting the
respective test. These tests are then identified with a horizontal dash, as is
also the case for tests which have not been passed.
13.2 Battery Operation
When only one solid segment remains in the battery symbol, the batteries
must be replaced, or recharged if rechargeable batteries are used.
Check the batteries at short, regular intervals or after lengthy periods of
storage to make sure no leakage has occurred. If leakage has occurred,
the electrolyte must be carefully and completely removed from the
instrument with a damp cloth before new batteries are installed.
Note
+
Prior to lengthy periods of rest (e. g. holiday), we recommend
removing the (rechargeable) batteries. This helps to prevent
excessive depletion or leakage of batteries, which, under unfa-
vourable circumstances, may cause damage to the instrument.
Charging the Batteries
Attention!
!
Use only the NA102 battery charger (article no. Z501N) with safe
electrical isolation and a nominal secondary voltage of 9 V DC to re-
charge the batteries. Before connecting the battery charger to the
charging socket at the device, make sure of the following points:
– Rechargeable batteries have been installed (not normal batteries).
– The instrument has been disconnected from the measuring
circuit at all poles.
– The voltage selector at the charger has been set to 9 V.
Connect the NA102 battery charger to the charging socket with the
3.5 mm jack plug. Set the voltage selector switch at the NA102 to 9 V.
Switch the test instrument on.
The test instrument recognizes the fact that a battery charger has been
connected and starts the charging cycle. The 5 segments of the battery
symbol are continuously displayed in a sweeping pattern from left to right
for the entire duration of the charging cycle.
Depleted batteries require a charging cycle of approximately 14 hours. If
the batteries are exhausted to a great enough extent, the test instrument
can no longer be switched on. If this is the case, leave the test instrument
connected to the activated battery charger for about 30 minutes, and then
proceed as described above.
13.3 Changing the Batteries of the Temperature and Humidity Measuring
Adapter Z541A
Separate the bottom part of the housing from the top to change the bat-
teries.
Ð Untighten the screw at the bottom of the housing and remove the
housing lid.
Ð Insert two 1,5 V round cells of type LR1 (size N) in the battery com-
partment according to the indicated polarity symbols.
Ð Replace the housing lid (the opening at the bottom of the housing and
the thread of the screw must be on top of each other) and press the
lid until it engages. Retighten the screw carefully.
13.4 Fuses
If a fuse has blown due to an overload, an appropriate error message
appears at the LCD. However, the instrument’s voltage measuring ranges
are still functional.
Attention!
!
Disconnect the instrument from the measuring circuit before
opening the cap for replacing the fuse!