172 System Manual SCK Gas Sampling System 42/23-81 EN Rev. 4
Step Procedure
1
Switch service switch to ON position (see Operating the service
switch on page 159), press EMERGENCY STOP switch and allow
gas sampling system to cool down.
WARNING! Risk of burning in the event of contact with components
that are still hot. Do not touch components until they have cooled
down to below 50 °C.
2
Detach probe-side connection of sample gas path and seal.
3
Detach analyzer -side connection and fit a tee with shut-off valve.
4
Connect a U-tube manometer half filled with water to the open
outlet of the tee.
5
Blow nitrogen or air through the shut-off valve to a positive pressure
of 100 hPa (= 1000 mm water column).
6
Close the shut-off valve. Pressure should not change noticeably
within one minute (pressure drop < 1 hPa). A greater pressure drop
indicates a leak.
7
After fixing any leaks, refit the sample gas lines.
8
Turn service switch back to OFF position and insert gas sampling
probe again using the controller.
WARNING! Gas sampling probe moves into the kiln. Do not stand
in the area of travel of the gas sampling probe or probe carriage
until the probe is completely inserted into the kiln and the warning
lamps go out.
How to check the compressed-air system for leaks:
Step Procedure
1
Switch service switch to ON position (see Operating the service
switch on page 159), press EMERGENCY STOP switch and allow
gas sampling system to cool down.
WARNING! Risk of burning in the event of contact with components
that are still hot. Do not touch components until they have cooled
down to below 50 °C.
2
Spray leak detection spray on:
Screw connections and connectors
Compressed-air tubes
Also listen for audible blowing-off sounds.
3
If you locate a leak: replace component and ensure adequate
sealing.
4
Turn service switch back to OFF position and insert probe again
using the controller.
WARNING! Probe moves into the kiln. Do not stand in the area of
travel of the probe or probe carriage until the probe is completely
inserted into the kiln and the warning lamps go out.
Instructions:
checking the
compressed-air
system
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