Installation, Commissioning And Operation - WIKA 70 Betriebsanleitung

5. Installation, commissioning and operation

5. Installation, commissioning and operation
When fitting and using the instruments, the following
GB fundamental requirements must be followed:
The display range of the safety temperature regulator should be chosen

so that the maximum temperature at the sensor does not exceed the
display range. Also, after the switchpoint has been exceeded, a
resultant reheating process has to be taken into account.
In operation the equipment should not be subjected to strong vibration

or impact loads.
Contamination and high ambient temperature fluctuations should be

avoided.
Any break in the capillary will destroy the instrument and result in it

switching off.
Electrical connection
The connection diagram is shown on the instrument label on the
outer rim of the case.
5.1 Installation condition
Before installing the probe, check whether the probe material used (specified
in the delivery note) is chemically resistant/neutral to the medium being
measured. This also applies to thermowells.
Ensure that all the necessary accessories for the mounting method ordered
have been supplied e.g. instrument mounting brackets, clamp straps for panel
mounting, contact adjustment buttons, etc..
The accessories will be either on the instrument or supplied in a separate bag,
which in most cases will be attached to the thermometer.
If possible, the entire length of the stem should be exposed to the tempera-

ture to be measured, but, if not, it should at least be the length of the active
part (active length), which corresponds to the length of the expansion vessel.
In pipelines or other measuring points the temperature probe should be

directed as far towards the flow as possible.
If a thermowell is used, the stem must not be allowed to touch the bottom of

the thermowell.
6 WIKA Operating instructions Expansion thermometers Model 70