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GAA610-M ADVANCED EMISSION GAS MONITORING SYSTEM | OI/GAA610-M-EN REV. B
... 13 Maintenance
... Calibrating the analyzer system
Manual calibration
Definition
Manual calibration means:
Calibration with test gases. Zero and span are calibrated
separately by pressing the gas analyzer display and control unit
softkeys.
Test gases are dry gases, without any amount of water content.
The resulting zero-point shift switches the complete sensitivity
line parallel and adjusts the calibration to the operating
conditions.
Note
Before calibration let the system run with ambient air for at least
12 min.
Starting manual calibration
In the following, the calibration with test gas is explained by
using SO
as an example. For other components the procedure is
2
the same.
The manual calibration can only be started using the menu
'MENU / Calibrate / Manual Calibration'.
Zero Point
Figure 38: Stable zero point
If you have opened the manual calibration, you must first select
the component. Then select the zero or end point. You should
start with the zero point.
In the next step, the concentration of the test gas can be
entered. For the zero point ambient air can be used, therefore
the concentration of SO
is 0ppm. Confirm your settings.
2
You must wait a little until the measured value is stable. If the
measured value no longer changes, confirm your setting.
The system now performs the calibration for the zero point.
Confirm the new measurement value again to save the
calibration.
Span Point
Figure 39: Stable end point
For the end point, the procedure is very similar. First select the
component and the option 'Span gas'.
Now enter the concentration of the test gas you are using.
Please note that the test gas should have a concentration of
80 to 100 % of the measuring range. When you have confirmed
the concentration, you can give up the test gas using the test
gas connection.
From the first visible signal change wait at least 10 minutes
(Please do not purge the system with dry gas for more than
15 min.). After that, confirm your reading when the end point is
reached.
The system now performs the calibration for the span point.
Confirm the new measurement value again to save the
calibration.
The calibration is completed. This can be checked in the logbook
'MENU → Diagnostic/Information → Logbook'. The logbook
saves the last 500 events.
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