Welch Allyn Duet CO2 Module - User Manual - Manual (Page 78)

Duet CO
2
Module OEM Implementation Manual
Page 78 Confidential Welch Allyn OEM Technologies
16h, No Water trap
The Duet CO
2
Module does not detect a Water trap properly inserted into the Water trap
receiver. The Duet CO
2
Module inhibits CO
2
waveform and breath data packets unless the
Water trap is only temporarily disconnected. If reinsertion occurs within 30 seconds from
disconnect, the Duet CO
2
Module resumes normal operation. If not connected within 30
seconds, the Duet CO
2
Module reverts to standby mode and halts the transmission of data
packets. When the advisory is cleared, a new measurement mode command is required to
resume data packet transmission unless the module was in the auto run mode. In this case,
measurement resumes. The sidestream pump is disabled during this advisory.
Action Reinserting the Water trap into the Water trap receiver. If this does not clear the
advisory, the internal Water trap receiver switch may be misaligned or faulty.
17h, Water trap or Cannula Occlusion
Low flow and high vacuum conditions are detected in the pneumatic system. CO
2
waveform
and breath data packets are available despite the advisory. The Duet CO
2
Module attempts to
clear obstructions while reporting these conditions by increasing the pump speed. If the
obstruction is not cleared after 5 seconds, the module decreases the pump speed and holds
vacuum for an additional 15 minutes. If the obstruction is not cleared after 15 minutes, the Duet
CO
2
Module reverts to standby mode.
Action clearing any obstructions in the Water trap and cannula. Straighten any kinks in the
cannula tube. If the error persists, isolate the obstruction to the Water trap or the cannula by
briefly disconnecting the cannula from the Water trap. If the cannula is the source of the
blockage, the fault is corrected. If the fault persists, replace the Water trap and/or the cannula.
18h, Exhaust Occlusion or Pneumatic Leak
Low flow and normal vacuum conditions are detected in the pneumatic system. CO
2
waveform
and measurement data packets are available despite the advisory. Normal measurement
resumes once the advisory is cleared.
When this condition occurs, the Duet CO
2
Module increases pump speed to a
maximum and runs indefinitely until the condition is cleared.
Action Clear any obstructions in the exhaust tube and screen. Straighten any kinks in the
exhaust tube. If the condition persists, verify that the pump is operating by resetting the mode
and listening for audible pump operation noise.
Soft Faults
Soft faults are conditions that halt module operation until the condition is cleared. CO
2
waveform and
breath data packet transmission is halted until the fault is cleared. The module can accept commands
in this error state.