User manual

T38.0.0X.6C-03 Page 5 of 7
6. Operation
6.1 Display functions
Currently measured values: During normal operation the CO2 display value is displayed in ppm.
Min- / Max-value memory:
Watch min values (Lo): press ▼ shortly once display changes between
Lo- und Min-values
Watch max values (Hi): press ▲ shortly once display changes between
Hi- und Max-values
Restore current values: press ▲ or ▼ once again current values are displayed
Clear min values: press ▼ for 2 seconds Min values are cleared.
The display shows shortly “CLr” (Clear)
Clear max values: press ▲ for 2 seconds Max values are cleared.
The display shows shortly “CLr” (Clear)
After 10 seconds the currently measured values will be displayed again.
Min- / Max- Alarm:
Whenever the measured value is exceeding or undershooting the alarm-values that have set, the alarm-
value and the measuring value will be displayed alternating.
AL.Lo the lower alarm boundary is been reached or is undershot.
AL.Hi the upper alarm boundary is been reached or is exceeded.
6.2 Error an System messages
Display Description Possible fault cause Remedy
Err.1
Measuring range
exceeded
Wrong signal. Take care for fresh air.
Err.7
System fault Error in device. Disconnect from supply and
reconnect. If error remains
return device to manufacturer.
Err.9 Sensor error Sensor defective.
Er.11
Calculation not possible
Calculation variable
missing or invalid.
Check temperature.
8.8.8.8
Segment test
The transducer performs a display test for 8 seconds after
power up. After that it will change to the display of the
measuring.