Welch Allyn LC101 CO2 Module - User Manual - Manual (Page 47)

LC101 CO
2
Module OEM Implementation Manual
Welch Allyn OEM Technologies Confidential Page 47
Section 5
Pneumatic Operation
The LC101 Module Pneumatic System is responsible for controlling the flow to the sidestream
bench in order to measure the patient’s CO
2
level. The Pneumatic System must set the flow as
commanded by the host and keep it within flow specifications. Conditions such as inlet/exhaust
irregularities, internal pneumatic disconnects and pump failures are detected by the Pneumatic
System.
NOTE All user message handling and recovery procedures for pneumatic events, disconnects
of internal pneumatics and pump failures are the responsibility of the host system.
The LC101 Module and the host system are referred to as the “Module” and “host” in the
remainder of this section.
Normal Flow
Normal flow is controlled by the Pneumatic System to remain within +15/-20% of the set flow
rate. The host can set a flow rate between 90 ml/min and 200 ml/min using the Change
Pump Flow Rate command. The Module responds to a requested flow rate that either exceeds or
is less than the flow limits with a Invalid Data response.
The host can expect stable pump operation during normal flow conditions without additional
intervention; however, the host must poll the Module periodically to determine the status.
WARNING The host should not assume that the Module is faultless if CO
2
waveform and
breath data is being sent.