Welch Allyn LC101 CO2 Module - User Manual - Manual (Page 59)

LC101 CO
2
Module OEM Implementation Manual Appendix A - Software Prodedures
Welch Allyn OEM Technologies Confidential Page 59
Example of Verification Using Dry Gas
Because Module verification is typically accomplished using “dry” CO
2
gas from a canister, the
automatic compensations for water vapor and BTPS must be disabled prior to verification. The
host system can temporarily disable these module functions by using the sequence below:
NOTE The Module will revert to the default settings (BTPS and Water Vapor compensations
enabled) when the Module is reset or power cycled. Refer to the Host/Module
Communications section (page 25) for more details on the commands listed in the
table. Because the CO
2
concentration contained in a canister or cylinder is typically
listed in percent values, it is recommended the host also convert the module’s CO
2
data
to percent for comparison purposes.
6 Host sends Sample CO2 Span Gas command.
Module responds with status - Calibration in Progress, or
if not in unprotected measurement or autorun mode, response is Invalid
Operation (use ), or
if a calibration had not been started, response is
Cal. Not in Progress, or
if the calibration has exceeded its maximum time allowed, response is
Unable to Perform Cal., Missing Parameters.
7 Host polls for completion of sampling.
Module responds with status - Calibration in Progress. Repeat this
step until a response other than is returned.
Module responds with status - Calibration OK, or
if the calibration has exceeded its maximum time allowed, response is
Unable to Perform Cal., Missing Parameters, or
if acquiring data does not meet specifications, response is
Unable to
Perform Cal., Data Error.
8 Host sends Protect command.
Module responds to command from host
Command from Host Description Note
C00 Requests Module status Verify no faults are reported
Q7F0 Unprotects the Module
Q080 Disables Water Vapor Comp
Q090 Disables BTPS Compensation
O00 Disable Breath Data Packet For continuous CO2 mode