MultiExact Gas Analyser
6 – Calibration
supply to the analyser sample gas inlet.
2.
Select
➞
Calibrate.
☞
On a 2-measurement analyser,
this screen will show one 'Lo' and
one 'Hi' calibration for each of the
two measurements.
Figure 73 – The calibrate screen
Note that the "9999d" field of the screen shown in Figure 73 will identify the
period of time that has elapsed since the last calibration, and can be in any of
the following forms:
•
9999d specifying days
•
9999h specifying hours
•
9999m specifying minutes
•
Any combination of these.
3.
Use the
and
soft keys to select the required calibration, that is:
•
'Lo' (low calibration gas).
•
'Hi' (high calibration gas).
4.
Press the
soft key. The
Calibrate target value screen will
then be shown (see Figure 74),
identifying the target value and the
current reading.
Figure 74 – The calibrate
target value screen
5.
If the target value is not correct for the calibration gas which you are using,
change the target value to the required value: use the edit method shown in
Section 4.10.
☞
Refer to Sections 2.4 and 2.5 for the required pressures, flow rates (if
applicable) and concentrations of the calibration gases.
6.
When the current reading is stable, wait a further 3 minutes, then press the
soft key. The analyser will then carry out the specified calibration.
7.
Repeat steps 1 to 8 of this section for the second calibration.
8.
If your analyser is configured to provide two sample gas measurements, repeat
steps 1 to 9 of this section to carry out the 'Lo' and 'Hi' calibrations for the
second transducer.
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