WIKA 851 - Manual (Page 18)

WIKA operating instructions magnetic snap-action contact model 821
GB
18
2003325.03 03/2011 GB/D/F/E
10. Maintenance and cleaning
10.1 Maintenance
The instruments are maintenance-free. The indicator and switching
function should be checked once or twice every year. For this the
instrument must be disconnected from the process to check with a
pressure or temperature testing device.
Repairs must only be carried out by the manufacturer or appropriately
qualified skilled personnel.
10.2 Cleaning
CAUTION!
■ Clean the instrument with a moist cloth.
■ Wash or clean the dismounted instrument before
returning it, in order to protect personnel and the
environment from exposure to residual media.
10. Maintenance and cleaning / 11. Dismounting and ...
11. Dismounting and disposal
WARNING!
Residual media in dismounted pressure or temperature
measuring instruments can result in a risk to persons, the
environment and equipment. Take sufficient precautionary
measures.
11.1 Dismounting
Only disconnect the instrument once the system has been depressurised!
When dismounting, close the compensating valve (if available).
Risk of burns with temperature measuring instrument!
Let the instrument cool down sufficiently before dismounting! During
dismounting there is a risk of dangerously hot pressure media escaping.
11.2 Disposal
Incorrect disposal can put the environment at risk. Dispose of instrument
components and packaging materials in an environmentally compatible
way and in accordance with the country-specific waste disposal
regulations.