Design And Function - WIKA Intelli Therm TGT73 Manual De Instrucciones

3. Specifications / 4. Design and function
Designation of terminal
connectors dependent on the
output signal variant
GB
For further specifications see WIKA data sheet TV 17.10 and the
order documentation.

4. Design and function

4.1 Description
The gas-actuated thermometer consists of a stem, capillary, Bourdon
tube and transmitter in the casing. These parts are combined to form
a single unit. The entire measuring system is filled with an inert gas
under pressure.
Any change in temperature causes a change in internal pressure in
the stem, and thus a change in the shape of the pressure element.
This motion is converted, via a mechanical movement, into a
rotational motion. A magnet on the pointer shaft rotates proportionally
to the instrument pointer as a direct linear function of the process
temperature. The downstream electronics detect the rotational motion
of the magnet in the display range.
A magnetic-field dependent rotational sensor picks up this change on
the electronics side, contact-free, wear-free and without reaction on
the pressure element.
10
Terminal Variant I
4 ... 20 mA
Type
1 GND
2 I+
3 reserved
4 reserved
5 reserved
6 reserved
WIKA operating instructions model TGT73
Variant II
0 ... 10 V
GND
UB+
U
out
reserved
reserved
reserved