User's Manual

Multigas
22-11
The analyzer automatically compensates for the ambient barometric pressure to
ensure accurate readings. Both CO
2
values may appear in partial pressure (in
mmHg or kPa) or in percent.
Powering ON the Unit
Before powering the multigas analyzer ON, make sure it is attached to a patient
monitor and the Stand By switch on the gas analyzer is OFF (in the “out” position).
Press POWER ON/OFF located on the rear panel of the analyzer. The patient
monitor must be powered on prior to powering on the analyzer.
When you first power ON a properly installed multigas device, the green power-on
LED lights within 5-seconds. Within 30-seconds the patient monitor displays the
vertical GAS parameter key adjacent to a flat waveform.
If this does not occur, verify that the POWER ON/OFF button is pressed and
appears green, and that the front panel STAND BY button is not pressed. The
analyzer must be connected to an AC power outlet. Verify that the appropriate
SDLC cable and terminator are connected from the unit to the monitor (refer to the
90518 Multigas Analyzer Service Manual, P/N 070-0643-xx). If the monitor or the
module housing has a SDLC switch, check that the switch is in correct position
(refer to the operations manual for the monitor or module housing). If the GAS
parameter key does not display on the monitor, turn the power to the analyzer
OFF, then turn the power to the monitor OFF. Power ON the monitor again, and
then power on the analyzer again.
CAUTION:
• The analyzer cannot be operated without a water trap and a
gas analyzer filter installed.
• Replace the water trap and gas analyzer filter as needed.
Verify the water trap is not broken as a result of connecting
the sample line fitting too tightly or by tugging on the
sample line. To verify, place a finger over the end of the
sample line and wait for the alarm. Check the sample line
connection on the water trap for damage. A broken water
trap results in low values due to room air entrainment. If a
span calibration is performed with a broken water trap,
patient values will be unusually high. Refer to Initiating a
Calibration on page 22-19 and Replacing the Gas Analyzer
Filter on page 22-12 for details.
!
• Check the disposable water trap regularly during monitoring.
Replace the water trap when full.
• Between patients, replace the sampling line and check the
disposable water trap. Replace the water trap when full.
% Gas =
PARTIAL PRESSURE GAS
x 100%
BAROMETRIC PRESSURE
!
• Respiration rate and alarm limit accuracies are not specified
above 100 breaths per minute.