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Capnography (CO2)
Propaq Encore Reference Guide 87 Welch Allyn
ALTIMETER FAILURE - RATE. The altimeter has detected that the ambient pressure is
changing at a rate greater than 100 mmHg/minute. When the rate of change is back
within the 100 mmHg/minute range, disconnect and reconnect the CO
2
sensor to the
Propaq.
DEGRADED WAVEFORM, CHECK ADAPTER (UNCAL appears in the numerics
area). The Mainstream CO
2
adapter is obstructed or the CO
2
sensor has failed. The CO
2
waveform is displayed without range values. Replace the adapter or replace the sensor.
LACK OF WAVE, CHECK ADAPTER, SENSOR. Either the airway adapter is
obstructed or the CO
2
sensor has failed. Replace the airway adapter if it is obstructed.
The sensor must be unplugged and plugged in again.
LOW BATTERY, HEATER DISABLED (UNCAL appears in the numerics area). The
Propaq’s battery voltage is too low. The CO
2
waveform is displayed without range
values. To continue operation, plug the ac power adapter into the Propaq.
NO MAINSTREAM SENSOR DETECTED (SRCH appears in the numerics area). The
Mainstream CO
2
sensor has been disconnected from the Propaq after providing CO
2
values. Disconnect and reconnect the sensor to the Propaq if necessary.
NON-PROTOCOL SENSOR (UNCAL appears in the numerics area). A CO
2
sensor has
been connected that does not match Welch Allyn’s specifications. The CO
2
waveform is
displayed without range values. Replace the sensor with a Welch Allyn CO
2
sensor.
SENSOR FAILURE, CALIBRATION ERROR. A sensor is defective or out of calibration.
The sensor will be disabled. Replace the sensor.
SENSOR FAILURE - EEPROM. The sensor has failed. Replace the sensor.
SENSOR FAILURE - HEATER. The sensor’s temperature control circuit or the Propaq’s
CO
2
circuitry has failed. Try replacing the sensor. If the message reappears, have the
Propaq serviced.
SENSOR FAILURE - MOTOR DRIVE. The sensor’s motor drive (in the sensor head)
has failed. Replace the sensor.
SENSOR TEMPERATURE TOO HIGH. The sensor’s temperature is too high. The
sensor’s ambient operating range is 10° to 46° C. When the ambient temperature returns
to this range, this message is automatically removed and operation is restored.
WARM UP or WARM (appears in the numerics area). The sensor heater is warming up.
Wait 20 to 30 seconds for the sensor to heat. Values should appear in the numerics area
when the sensor is sufficiently warm.