COSA Xentaur COSA 707 - Manual (Page 34)

COSA Instruments USER MANUAL COSA 707
www.cosaxentaur.com 34
12.5 CO purging (optional)(not possible with CO2 IR sensor)
When the CO ppm limit is reached the analyzer will start the CO purging pump to protect the CO
sensor from getting saturated with CO. Other values will not be affected while the CO sensor is
being purged.
While the CO sensor is being purged the CO value is not displayed and dashes will appear on the
display. The dashes will remain red as long as the CO value is higher than the CO ppm limit, and
they will turn black once a level below the selected ppm value has been reached.
The purging does not stop automatically: it must be turned off by the user.
Press the “Folder” key and select “purge pump off” to cancel the CO purging function.
The actual CO value will then be displayed again.
12.6 CO/H2 and BigCO (optional)
If that exceeds CO the CO threshold, then to BigCO, the measured value is red indicated - also the
calculated values - is switched.
The CO value exceeds 10.000 ppm to % is in such a way switched (example 1.00%).
If the CO value sinks below the CO threshold, then the red CO value becomes again black
Starting from this moment the purge pump can be switched off over the menu key