WIKA TGT70 - Manual (Page 13)

14047194.02 02/2013 GB/D/F/E
WIKA operating instructions model TGT70 13
GB
Permanent indication errors caused by the ageing of the measuring system can be ignored,
as they only account for a fraction of the indication accuracy.
6.4 Zero adjustment
A zero adjustment may only be carried out by the manufacturer or in adequately equipped
workshops by qualified persons.
■ The electrical connection must only be made by qualified skilled personnel.
■ Connect the switch via cable terminal box.
■ Conductor cross section max. 1.5 mm 2
■ The terminal assignment is stated on the product label of the thermometer.
7. Maintenance and cleaning
7.1 Maintenance
This expansion thermometer is maintenance-free.
The indicator should be checked once or twice every year. To do this the instrument must
be disconnected from the process and checked using a temperature calibrator.
Repairs must exclusively be carried out by the manufacturer or by appropriately qualified
personnel.
7.2 Cleaning
CAUTION!
■ Prior to cleaning, switch off and disconnect the instrument from the mains.
■ Clean the instrument with a moist cloth (in soapy water).
■ Electrical connections must not come into contact with moisture.
■ Wash or clean the dismounted instrument before returning it, in order to
protect persons and the environment from exposure to residual media.
■ Residual media in the dismounted instrument can result in a risk to persons,
the environment and equipment. Take sufficient precautionary measures.
For information on returning the instrument see chapter 9.2 "Returns".
6. Commissioning, operation / 7. Maintenance and cleaning