Welch Allyn Duet CO2 Module - User Manual - Manual (Page 91)

Duet CO
2
Module OEM Implementation Manual
Welch Allyn OEM Technologies Confidential Page 91
self reset- The module returns to its original state due to a condition other than a watchdog
timeout.
sensor fault- An error associated specifically with the CO
2
sensor.
sensor signal- The output of the CO
2
bench or measurement device.
set flow rate- The rate of flow commanded by the Host system. The actual flow rate must be
within +15, -20% of this setting.
short watertrap receiver- A Welch Allyn OEM accessory that mechanically interfaces the
watertrap with the Host system.
sidestream sampling- CO
2
analysis whereby the analysis is accomplished within a device.
The patient’s expired gas is aspirated from the airway and drawn to the device through a
sample line.
simple command- A Host communication to the module to request data or a status change.
Data is not sent with these commands.
simple response- The module communication to the Host in reply to a command.
soft fault- A error condition where the module will continue sending waveform and data
packets, but report the fault when polled for status.
software reset- A specific command that clears the module and returns it to its original mode
and configuration settings.
standby mode- Module mode that disables the source, pump and data packets. It typically
used when a low power, standby state, is desired.
status response- Data packets from the module that communicate sensor or module status.
The status response also serves as an acknowledgement for mode commands.
steady state measurement- A continuous measurement of CO
2
taken without regard to
patient respiratory rate. It is normally used during calibration, or when verifying the presence of
background CO
2
in an incubator. Usually the breath data update is disabled during steady
state measurements.
system fault- An error associated specifically with the main board.
thermistor – A resistor that has a large nonlinear temperature coefficient of resistance.
Typically used for temperature measurement feedback.
trachea- a passageway that conducts air from the larynx to the main stem bronchi, or wind
pipe.
tracheostomy- The cutting of an opening into the trachea.
ventilator- A machine or device that provides a constant supply of oxygen to the lungs by the
movement of gas into and out of the pulmonary system.
warm standby mode- Mode of operation where only the sensor heater is active and the
sensor’s motor and source circuitry are not active.
watchdog- A failure detection mechanism internal to the microprocessor.
watchdog reset- A reset caused by a watchdog timeout.