3.36
The display should show
0.02 70
The microprocessor has measured and stored the first pair of oxygen and pressure
readings.
6. Display the measured oxygen reading. Press:
SET GAS SAMPLE
9
ENTER
Display should show:
100.00 (±0.02%)
7. Increase the pressure in the measuring cell by closing the back pressure hand valve
on the vent of the system.
8. Increase bypass flow to between 6.5 and 7 litres/min and set sample flow to
100ml/min.
Observe the oxygen reading. Allow it to stabilise before proceeding.
9. Display the pressure in the cell, press:
DISPLAY Lo
1
5
Display should show an increase of between 10 and 18 compared to the value noted
in step 3 of this procedure. It must not exceed 149.00.
10. Enter the password then perform the second stage of the calibration procedure, press:
SET ZERO
7
Lo Lo
0
ENTER
Display should show
0.01 70
The microprocessor has measured and stored the second set of oxygen and pressure
readings and has calculated the compensation factor.
If the display does not show 0.01 70 see Table 3.4 for error messages.
11. Display the measured oxygen reading, press:
SET GAS SAMPLE
9
ENTER
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