ABB CEMcaptain GAA610-M, Руководство по эксплуатации

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78
GAA610-M
ADVANCED EMISSION GAS MONITORING SYSTEM | OI/GAA610-M-EN REV. B
… 13 Maintenance
… Calibrating the analyzer system
Measurement of calibration cells with test gas
Definition
The measurement of a calibration cell in the Uras26 analyzer
modules means:
Determining what calibration cell ‘deflection‘ is equivalent to
the calibration reading with test gas. The ‘deflection‘ is
stored as the ‘set point‘ of the calibration cell.
When should calibration cells be measured?
We recommend measuring the calibration cells once a year. We
recommend measuring the calibration cells:
• after end-point calibration of a sample component with
test gas or
• after any change in measurement range limits or
• after a Basic calibration.
Starting and performing the Measurement of calibration
cells
Figure 40: CO
2
end point with calibration cell
Please note that before measuring the calibration cuvettes, the
zero and end points of the respective sample components must
be calibrated with test gases.
During the measurement, the system should use ambient air.
1. Open the menu ‘MENU / Maintenance/Test / Analyzer spec.
adjustm. / Measure cal. cell’.
2. Please wait until the measured value is stable (Figure 40).
3. If this is the case, confirm the setting with ‘
ENTER ’.
Checking the seal integrity
When is the seal integrity check needed?
Complete seal integrity check of the analyzer system is reserved
for certified service personnel.
It should be carried out regularly at least every 12 months.
It must be performed after gas paths within the analyzer system
have been opened and following a restart from cold.
The seal integrity check should be performed according to the
pressure-drop method using a U-tube manometer.
Procedure
1. Interrupt the sample gas supply.
2. Close the sample gas outlet.
3. Disconnect the sample gas line from the sample gas inlet and
connect a tee fitted with a shut-off valve.
4. Connect the U-tube manometer half filled with water to the
free end of the tee.
5. Blow air or nitrogen through the shut-off valve to a gauge
pressure of approx. 100 hPa (= 1000 mm water column).
6. Close the shut-off valve. The pressure should not chance
measurably in 1 minute (pressure drop ≤ 1 hPa). A sharp
pressure drop is a sign of a leak.