Commissioning, Operation; Mechanical Mounting - WIKA TR10-A Manual De Instrucciones

5. Commissioning, operation

5. Commissioning, operation
WARNING!
Damage to the measuring instrument by operation outside the upper
EN
or lower limits of the operating temperature
Failure to observe the permissible operating temperature, also taking
into account convection and radiation, can even cause damage to the
thermometer during mounting.
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5.1 Mechanical mounting

5.1.1 Multipoint thermometers
They are usually equipped with a case in which transmitters or terminal blocks are
mounted.
The transmitters/digital displays are fastened mechanically (e.g. rail system in case or
holder in connection head).
5.1.2 Cable probe
These are generally not fitted with a case. They can, however, be connected in an
additional case in which transmitter or terminal blocks are mounted.
5.1.3 Parallel threads
If the thermometer connecting head, neck tube, thermowell or process connection are
connected with parallel threads (e.g. G ½, M20 x 1.5 ...), these threads must be secured
using seals which prevent liquids from penetrating into the thermometer.
As standard, WIKA uses copper seals for the connection between the neck tube and the
thermowell, and a paper flat gasket for the connection of the connection head and the neck
tube or thermowell.
If the thermometer and the thermowell are already connected, the seals will already be
mounted (if ordered). The plant operator must check whether the seals are suitable for the
operating conditions and must replace them, if necessary, with suitable seals (see chapter
11 "Accessories").
Seals must be replaced after dismounting!
5.1.4 Tapered threads
With NPT or other tapered threads, it should be checked whether it may be necessary
to seal them additionally with PTFE tape or hemp. The threads must be lubricated with a
suitable lubricant before fitting.
10
The upper and lower limits of the specified operating temperature range
must not be exceeded.
WIKA operating instructions, models TRxx and TCxx