Wika 54_twintemp Manual do Utilizador descarregar pdf (Página 12)

14004105.01 05/2011 GB/D/F/E

12 WIKA operating instructions model 54, Twin-Temp

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Residual media in dismounted instruments can result

in a risk to persons, the environment and equipment.

Take sucient precautionary measures.

For information on returning the instrument see chapter

9.2 "Returns".

8. Faults

Faults Causes Measures

No signal/ line

breakage

Mechanical load too high

or overtemperature

Replace probe or measuring

insert with a suitable design

Erroneous measured

values

Sensor drift caused by

overtemperature

Replace probe or measuring

insert with a suitable design

Sensor drift caused by

chemical attack

Use a design with

thermowell

Erroneous measured

values (too low)

Entry of moisture into

cable or measuring insert

Replace probe or measuring

insert with a suitable design

Erroneous measured

values and response

times too long

Wrong mounting geome-

try, for example mounting

depth too deep or heat

dissipation too high

Temperature-sensitive area

of the sensor must be inside

the medium, and surfaces

must be isolated

Deposits on the sensor or

thermowell

Remove deposits

Measurement signal

"comes and goes"

Cable break in connecting

cable or loose contact

caused by mechanical

overload

Replace probe

Corrosion

Composition of the medium

not as expected or modied

or wrong thermowell

material selected

Analyse medium and then

select a more-suitable

material or replace

thermowell regularly

7. Maintenance and cleaning / 8. Faults

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 59 60

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