42/24-10 EN Rev. 9 Appendix 3: ZO23 Trace Oxygen Analyzer Module A-3-7
Start-Up
Refer to page A-3-3 for information on the test gases
See also Chapter 8 “Gas Analyzer Calibration”, Section A “Principles” for
information on calibration.
Step Action
1 Switch on the power supply to the gas analyzer.
After approx. 15 minutes, the measuring cell has reached its
operating temperature. If required, the gas analyzer can be
calibrated at the reference point (see step 3) and the end-point
(see step 5) before measurement is started.
2 For setting the reference point (= electrical zero), feed ambient air
(flow rate see page Fehler! Textmarke nicht definiert.) and wait until
the measured value has stabilized (duration approx. 2 hrs).
Meanwhile, purge the test gas valves and the gas supply line with
oxygen-free gas (e.g. with nitrogen from a loop feeder) or with sample
gas (flow rate 5 to 10 l/h).
3 Set reference point to 20.6 % Vol. O
2
. Please refer to page A-3-3 for
calculation of the oxygen concentration.
4 Feed end-point gas (e.g. 2 ppm O
2
in N
2
) and wait until the measured
value has stabilized (duration max. 2 hrs).
5 Set end-point value in accordance with the certificate of analysis of
the test gas cylinder used.
Gas Analyzer
Start-Up Procedure,
Initial Calibration at
the Installation Site
6 The gas analyzer is ready for performing measurements; feed sample
gas.
Check of the End-Point and Reference Point
Refer to page A-3-3 for information on the test gases
Check of the
End-Point
It is r
ecommended that the end-point is checked approx. 4 weeks after start-up.
Further checks of the end-point should be carried out as required.
Check of the
Reference Point
It is recommended that the reference point is checked once a year or as required.
To Next Page
Loading...
Need help?
General
