Welch Allyn Duet CO2 Module - User Manual - Manual (Page 77)

Duet CO
2
Module OEM Implementation Manual
Welch Allyn OEM Technologies Confidential Page 77
15h, Barometric Pressure Offset Too Large (sidestream only)
Difference between the two pressure transducer values is greater than the upper barometric
offset limit when the pump is OFF.
Action Replacing one or both of the pressure transducers.
19h, Dark Phase Signal Noisy
IR detector voltage measured during the dark phase of the chopper wheel rotation is greater
than the upper signal limit. This is caused by electrical noise on the signal. CO
2
waveform and
breath data packets are available despite the advisory.
Action Relocating the Duet CO
2
Module and the mainstream sensor away from electrical
equipment. If available, replace the CO
2
sensor.
1Ah, Open Phase Signal Saturated
IR detector voltage measured during the open phase of the chopper wheel rotation is greater
than the upper signal limit. CO
2
waveform and breath data packets are available despite the
advisory.
Action If available, replace the CO
2
sensor.
27h, Calculation Error
Error detected when calculating CO
2
or breath measurement.
Pneumatic System
Status
Message Code Definition Possible Causes
16 no Water trap • Water trap not properly installed
• misaligned Water trap receiver switch
• faulty receptacle/Water trap receiver
switch
17 Water trap or cannula
occlusion • obstructed Water trap/cannula
• sample line kink
• obstructed internal pneumatic component
18 exhaust occlusion or
pneumatic leak • obstructed host exhaust port
• exhaust tubing kink
• faulty/disconnected pump