WIKA TR75 - Manual (Page 17)

11325232.04 01/2014 GB/D/F/E
WIKA operating instructions DiwiTherm ® , model TR75 17
GB
Typical mounting situation with contact bulb
■ Mounting on pipes
The geometry of the contact bulb has been
designed for pipes with external diameters
between 20 and 160 mm. For fixing the
contact bulb to the pipe, pipe clamps are
sufficient. The contact bulb should have
direct metallic contact with the measuring
point and have firm contact with the surface
of the pipe. Where temperatures under
200 °C are expected, a heat conductive
paste can be used to optimise the heat
transmission between contact bulb and pipe.
Insulation must be applied at the mounting
point to avoid error due to heat loss. This
insulation must have sufficient temperature
resistance and is not included in the scope of delivery.
Measuring
insert
Thermowell
Pipe clamp mounting
Lagging *
* Lagging mandatory!
6. Commissioning, operation
DiwiTherms ® must only be operated with an additional thermowell.
Exception: Axial cable outlet (for panel mounting) or version with contact bulb.
Typical mounting situation with thermowell
6. Commissioning, operation