3.13
To enter the span gas oxygen content, press
SET GAS SPAN
8
2 0 ! 9 5 ENTER
Span gas oxygen
content parameter Oxygen value
The display should show
20.95 98
98 is the parameter number for the oxygen content of the span gas.
Once the oxygen contents have been entered they are stored and do not have to be
re-entered unless the gases are changed or the microprocessor memory is lost because of
battery failure.
3.6.1 Zero Calibration
This is performed using the keys:
CAL ZERO
7
1. Introduce zero gas into the analyser at a cell flow rate of 100 to 250ml/min, (max
150ml/min for 313 and 364 cells).
2. Allow the oxygen reading to stabilise.
3. Check that the mechanical zero is within tolerances. This can be done by displaying
the uncalibrated oxygen value which is parameter 14. This should be within ±2% of
zero if the calibrating gas is nitrogen. If it is outside these limits the mechanical zero
needs adjusting. See Section 4.3.
4. Enter the password.
5. The zero calibration is done by pressing:
SET CAL ZERO
7
ENTER
The display should show
0.01 77
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