42/23-81 EN Rev. 4
System Manual SCK Gas Sampling System
171
Checking for leaks
Sample gas paths, the compressed-air system and cooling-water circuit must be
checked for leaks on a regular basis.
twice
yearly
as required in the following cases:
Sample gas paths: additionally after opening sample gas lines inside the
connected analyzer cabinet
Cooling-water circuit: additionally when pressure in the cooling-water circuit
drops frequently
Compressed-air system: additionally when pressure drops in the com-
pressed-air system without any cleaning process or probe retractor move-
ment taking place.
Always take the following safety measures when performing this work:
Wear the general protective equipment.
Turn the service switch to
ON
and secure the service switch against unauthor-
ized switching (with a padlock).
Additionally press the EMERGENCY STOP switch.
Do not enter the danger area around the retractor until it is at standstill and the
warning lamps and buzzer are off and the shutter is closed.
Do not perform the work until the gas sampling system has cooled down.
Avoid contact with the cooling water and the anti-freeze.
Wash any cooling water and anti-freeze off the skin immediately with water and
soap.
If cooling water or anti-freeze gets in the eyes despite protective glasses, rinse
them thoroughly under running water, holding the eyelids open.
Observe instructions in the anti-freeze manufacturer's safety data sheet.
Avoid contact with lubricating oil.
Wash any lubricating oil off the skin immediately with water and soap.
If any lubricating oil gets in the eyes despite protective glasses, rinse them thor-
oughly under running water, holding the eyelids open.
Observe instructions in the lubricating oil manufacturer's safety data sheet.
Always keep the floor around the gas sampling system clean and dry.
Explanation of safety measures:
Safety regulations for maintenance work on page
156.
The following tools are required:
For checking the compressed-air system and cooling-water circuit for leaks:
leak detection spray
How to check the sample gas paths up to the sample gas pump:
Meaning
Maintenance interval
Safety
measures
Required tools
Instructions:
checking sample gas
paths
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