GB-5
GB
Service mode
In Service mode, meter-specific operating data
can be called up.
Activating Service mode
1 Hold the selection key
pressed down.
A pixel will appear in each corner of the display.
2 Observe one pixel:
While the pixel is visible, hold the selection key
pressed down and release the key as soon
as the pixel has disappeared.
Repeat the process, until all the pixels are off and
“Test instructions” appears in the menu area.
Service mode is activated.
Service mode menu overview
Test instructions
Temperature
LCD pixel test
Test pixel screen
Cyclic test
UMI peripherals
UMI-1
UMI-2
UMI-3
Calibration factors
Main menu
–
–
–
Test instructions
Test instructions
Automatic return to main
menu after 5minutes of
inactivity
Hold on any screen to
return immediatelv
Temperature
The current gas temperature is displayed.
Temperature
24.39°C
LCD pixel test
A display test can be carried out in this menu.
1 Follow the displayed instructions.
A test pattern is shown in the display.
2 Briefly press the selection key .
A further test pattern appears in the display.
Hold the selection key pressed down. The display
switches to the previous menu.
Cyclic test
The accuracy of the meter can be checked using
a cyclic volume test.
Cyclic test: Starting
Cycles: 0-0 0000.00
C: 00.000000
m
3
U: 00.000000
m
3
Press to abandon test
– C = volume,
– U = volume (temperature converted),
– Cycles = number of complete measuring
cycles (measuring unit rotations) – number of
intermediate sampling points in the measuring
cycle.
– Overall measuring time [s].
Measurement must be carried out with a constant
flow rate in order to ensure that the cyclic test
produces an accurate result.
1 Briefly press the selection key in order to start
the measurement. A beep confirms the start of
the measurement.
In order to pause the measurement, briefly press
the selection key again. Measurement stops
when the full number of measuring unit rotations
has been completed.
Measurement ends automatically after 90 min.
A beep indicates that measurement has ended.
2 Read off the measurement results.
UMI peripherals
The status of the available interfaces for optional
communication modules is displayed.
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