Starting Up the Gas Analyzer
95
ZO23: Gas Analyzer Start-Up
Gas Analyzer Start-Up Procedure, Initial Calibration at the Installation Site
1
Turn on the gas analyzer power supply.
After approx. 15 minutes, the sample 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).
2
For setting the reference point (= electrical zero), feed ambient air
wait and 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.% of O
2
.
4
Feed span gas 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
6
The gas analyzer is ready for performing measurements; feed sample
gas.
NOTE
Information for test gases can be found in the section "ZO23: Preparation
for Installation (see page 25)".
