ABB SCK - Checking for Leaks

OI/SCK
-EN Rev. E Operating instruction SCK Gas Sampling System 173
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
movement 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 un-
authorized 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 glass-
es, 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 thoroughly 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 158.
The following tools are required:
 For checking the compressed-air system and cooling-water circuit for
leaks: leak detection spray
Meaning
Maintenance interval
Safety
measures
Required tools