Service procedures
8-13
Document no. 2044677-001
Remove any paper chaff from the paper compartment.
Clean the thermal printhead and the small glass window in front of the static brush with a
cotton swab dipped in isopropyl alcohol. Avoid contact with the rubber paper roller.
NOTE: Be careful to limit the application of alcohol to the thermal printhead and the window.
Leave the paper compartment empty and close the hatch.
"
2. Check external parts
• all connectors are intact and attached properly
• the module box and the locking system are intact
"
Reattach the module and check that the locking system moves properly.
CO
2
measurement
3. Check Mini D-Fend
Detach the Mini D-fend. Check the condition of the rubber O-rings on the metal Mini D-
fend connectors, located in the module front cover.
If necessary, detach the connectors by first disconnecting the tubes, then removing the
locking rings from the back of the front cover.
"
Replace the Mini D-fend and sampling line with new ones.
NOTE: Use only Datex-Ohmeda sampling lines in order to ensure proper functioning.
Connect the Extension Module, N-FC or N-FCREC to the monitor.
Turn on the monitor.
Configure the monitor screen so that the CO
2
curve is shown, for example as follows:
Monitor Setup - Screen 1 Setup - Waveform fields -
Field 6 - CO2
Digit Fields
Lower Field 1 - Gases
4. Module software
Wait until the message ‘Calibrating gas sensor’ disappears from the screen, then enter
the service menu.
Monitor Setup - Install/Service (password 16-4-34) - Service (password 26-23-8).
Write down the information regarding the ExtensionModule software.
5. Module bus communication
Enter the service menu General: Parameters - Gas Unit - General
Check that the Timeouts, Bad checksums and Bad c-s by mod values are not increasing
faster than by 5 per second.
If one of the values is increasing faster, it indicates a failure in module bus
communication.
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