Commissioning, Operation - WIKA TR12 Manual De Instrucciones

5. Commissioning, operation

5. Commissioning, operation
WARNING!
Damage to the measuring instrument by operation outside the upper
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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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During installation, take care to
Avoid distorting the cable sheath when tightening the pressure screw.
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Avoid cutting too deep into the cable sheath.
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Use suitable cable.
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Be careful of the clamping area of the cable gland.
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Thermometers must be earthed if dangerous voltages could be expected at the
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connection wires (caused, for example, by mechanical damage, electrostatic charge or
induction)!
The protection class is not valid with armoured cables (stainless steel sheathed).
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Seals should be checked for signs of brittleness and, if necessary, replaced.
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5.1 Removal and installation of the measuring insert
The bare wires have a cross-section of approx. 0.22 mm², are 150 mm long and are colour-
coded dependent upon the sensor type. The measuring insert is secured against twisting.
Before removing the measuring insert, fully disconnect the
electrical connections to the terminal block or transmitter.
After that, the neck tube can be loosened and unscrewed from the head.
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The upper and lower limits of the specified operating temperature range
must not be exceeded.
WIKA operating instructions models TR12, TC12