Welch Allyn Duet CO2 Module - User Manual - Manual (Page 81)

Duet CO
2
Module OEM Implementation Manual
Welch Allyn OEM Technologies Confidential Page 81
70h, CO
2
Sensor Temperature Too High
During measurement
• if mainstream operation, the mainstream sensor temperature is greater than 48
o
C for
more than 30 seconds.
• if sidestream operation, the CO
2
sensor’s temperature is greater than 60
o
C for more than
30 seconds.
Action Check for exposure of the CO
2
sensor to an excessive external heat source. This
includes the host system and the electronics in close proximity to the CO
2
sensor. If identified,
remove the source. If mainstream operation, try a different sensor and issue a new
measurement mode command.
71h, CO
2
Sensor Temperature Too Low
During measurement
• if mainstream operation, the mainstream sensor temperature is less than 36
o
C for more
than 30 seconds.
• if sidestream operation, the CO
2
sensor’s temperature is less than 5
o
C for more than 30
seconds.
Action Check for exposure of the CO
2
sensor to an excessive external cold source. This
includes the host system and the electronics in close proximity to the CO
2
sensor. If identified,
remove the source. If mainstream operation, try a new sensor and issue a new measurement
mode command.
72h, CO
2
Sensor Warm Up Failure (mainstream only)
Mainstream sensor warm up rate is less than 1
o
C per minute and is not able to reach the
required operating temperature of 42 o C. The module discontinues the warm up phase and
waits for a new command.
Action If the fault persists, check for a faulty mainstream sensor cable. Replace the cable, if
possible. If the fault persists, check for exposure of the mainstream sensor to an excessive
external heat or cold source. This may include the monitor or the electronics in close proximity
to the mainstream sensor. If identified, remove the source. If mainstream operation, try a new
sensor and issue a new measurement mode command.
73h, CO
2
Sensor Heater Output Error (mainstream only)
A heater output overload condition exists.
Action Inspect for damage to the mainstream sensor cable and replace if possible. If
mainstream operation, try a different sensor and issue a new measurement mode command.
78h, CO
2
Sensor Motor Speed Out of Range
CO
2
sensor’s chopper motor has too much or too little power to keep the motor speed in the
allowable range for more than 60 seconds. A CO
2
sensor shutdown occurs.
Action If mainstream operation, try a different sensor and issue a new measurement mode
command. If sidestream operation, send a new host measurement mode command.