User's Manual

Multigas
22-19
Selecting Stand By Mode
Stand By mode should be used for short durations only (for example, case
turnover). The Stand By feature keeps the unit warmed up.
The Stand By mode is not to be used in place of the power on/off. If the unit is in
Stand By mode and loses power (for example, if the unit is unplugged during
moving), when power is re-initiated, the analyzer may not display on the patient
monitor. It is best to use Stand By mode under supervision.
Press the front panel STAND BY button to initiate the Stand By mode. The pumps
stop drawing sampled gases, the analyzer display disappears from the monitor
screen, and the STAND BY light illuminates. Press STAND BY again to return the
analyzer to its normal operating mode when multigas monitoring is needed again.
Selecting a Pump Speed
You may select any of the following volumes of sampled gases that are drawn for
use in measuring gas values: 50, 75, 100, 125, 150, 175, or 200 ml/min, or you
may suspend sampling (pumps off). The unit defaults to 175 ml/min whenever it is
turned on.
Initiating a Calibration
Daily O
2
Sensor Test
The oxygen channel may drift slightly over time; therefore, an O
2
sensor test
should be performed daily. This test uses room air to check for aging of the
oxygen sensor and may be performed at any time (except during the first
4-minutes of operation). This check does not require special equipment or
additional gases.
If drift or aging of the sensor is detected, the 100% O2 SPAN REQUIRED
message will be displayed and a 100% O
2
span must then be performed to
calibrate the O
2
sensor for high concentration levels (>60%) of oxygen.
Further action is needed if an O2 SPAN FAILURE message or an O2 SPAN
REQUIRED message displays on the screen. However, the gas analyzer is still
functioning and all Agent, CO
2
, and N
2
O values remain accurate. The unit can be
used until the required calibrations can be performed. To remove the message
from the screen, simply touch the GAS key and then the NORMAL SCREEN key
of the monitor.
CAUTION:
• If the unit is taken out of Stand By and the analyzer display
does not appear on the patient monitor, turn the unit off
and then power on correctly.
WARNING:
• The gas analyzer calibrations must be performed by
qualified personnel.
• The calibration should occur when the unit is not actively
monitoring a patient.
To start multigas monitoring
from Stand By mode:
1 Press STAND BY to deactivate
the Stand By mode (switch is
“out”).
2 If the disposable water trap
and filter are not present,
install them now.
3 When multigas monitoring is
no longer needed, press
STAND BY (switch is “in”) or
turn unit OFF (on back of unit).
Do not disconnect power to
the analyzer or the monitor.
To select a pump speed:
1 Touch GAS.
2 Touch SETUP.
3 Touch PUMP SPEED.
4 Select desired pump speed.
To check O
2
sensor:
1 Turn unit on and allow warm up
to occur (4-minutes).
2 Touch GAS.
3 Touch CAL.
4 Touch CHECK O2 SENSOR.
5 At completion of successful
test, normal monitoring will
resume.