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6 SETTING UP
When the gas analyzer system has been correctly installed in
accordance with the requirements for intrinsic safety given in
Section 5.2, carry out the following setting-up procedures:
6.1 Katharometer Analyser Panel - Filling the
Drying Chamber – Fig. 6.1
1) Remove the drying chamber on the katharometer analyzer
panel by unscrewing the large knurled nut at the base of
the chamber. Pull the chamber down and out of the sealing
groove to remove it from the panel.
2) Open a container of fresh granular calcium chloride,
immediately fill, and prepare to replace, the drying chamber.
Note. The capacity of the drying chamber is about
140ml. To fill the chamber, approximately 100g of calcium
chloride is required.
3) Replace the drying chamber in its sealing groove and
reposition the chamber to enable it to be secured and
sealed by hand tightening the knurled nut.
4) Carry out an approved leak testing procedure before
passing sample gas through the system.
Metering
valve
Gas
sample
inlet
6.2 Setting Sample Flow
When all tubing interconnections have been made and
external parts of the sample system checked for leaks, the
suggested procedure is as follows:
1) Arrange to supply calibration quality carbon dioxide gas
2) Gradually open the metering valve on the katharometer
may not be considered an adequate check of gas tight
integrity in respect of the more penetrating hydrogen gas.
Consideration may be given to the use of a gas , such as
helium, which has penetrating properties nearer to that of
hydrogen.
3) Slowly open the metering valve to give a nominal flowrate
4) Set the flowrate and shut off the calibration gas external to
5) Repeat this procedure for each katharometer analyzer
Katharometer
unit case
Drying chamber
Fig. 6.1 Katharometer Analyzer Panel
through the gas analyzer system at the normal working
pressure of the application plant and within the limits given
in Section 13.
panel to pressurize the complete system to the maximum
pressure given in Section 13.
Caution. Testing for leaks with carbon dioxide
.
of gas of 100 to 150 ml
min
flowrate given in Section 13.
the analyzer system.
panel, as required.
Gas sample
outlet
Coarse zero
adjustment
6 SETTING UP...
-1
. Do not exceed the maximum
Electrical
interconnections
Flow gauge
17
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