Gossen MetraWatt GEOHM C Mode D'emploi page 47

Background Illumination and Contrast
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Press the Display key.
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In order to extend battery service life, display illumination can be
switched off entirely.
Press the corresponding softkey to this end.
If LCD illumination is activated (ON), it is automatically switched off
several seconds after the last key has been activated in order to extend
battery service life. As soon as a key is activated again, illumination is
switched back on.
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Contrast can be optimized with the two keys at the far right.
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The setup menu is exited by pressing the START key, and the selected
settings become effective.
GMC-I Messtechnik GmbH
LCD Illumination Contrast
off on low high
Self-Test
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The self-test is started from the main menu with the Test key. The test
has a duration of several minutes.
The following information is displayed in the two headers:
Type/Cal: Device type / date of last calibration (balancing)
Version: Software version and issue date
Self-tests for items Chksum through LED are performed automatically,
one after the other, and are checked off or marked with a horizontal dash
if they are not passed.
Chksum1/2: Status display for internal testing (each test must be
completed with a check mark). If not, the measuring and
test instrument may no longer be used. Please contact our
service center in this case.
Relays: Each relay is switched twice.
LED: The RH/RS and LIMIT LEDs each blink twice in red, and the
Netz/Mains LED blinks twice in green and twice in red. The
U lamp blinks twice in red.
noise
As soon as the tests in the left-hand column have been completed, the
following tests must be started manually.
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Illum: Press the Test key twice in order to activate and deactivate
display illumination.
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