TP17 / TPM
Commissioning and operation
Technical changes reserved
- 19 -
4.3.3
Calibrator for surface temperature sensors
Type
TP17 200 TP17 165 TP17 166 TP17 450 TP17 650 TPM 165 TPM 225 TPM 255
Surface
-/-
-/-
-/-
A special surface insert is used for calibrating surface temperature sensors. This makes
calibration fast and easy.
The surface insert is hollow from the bottom and longer
than the adapter sleeve. For reference sensors, three
boreholes are located directly under the surface (1 x 3mm
• 1 x 3.1mm • 1 x 4.5mm). Thus, the exact surface
temperature of the insert can be measured.
The two threaded boreholes in the border are for the
accompanying exchange tool.
Inserting:
The surface insert is inserted into the metal block with
the aid of the exchange tool.
Removing and cleaning:
Let the calibrator cool before you remove the surface
insert.
Pull the surface insert out of the metal block with the
help of the exchange tool.
Clean the surface insert and the metal block.
This prevents the surface insert from getting stuck in the metal block.
IMPORTANT NOTICE!
The calibration of surface temperature sensors is very difficult and not uncontroversial.
The temperature sensor, which are placed on the surface, conduct heat away from the
surface and thus produce a cold spot on the surface to be measured.
Using a multifunction calibrator, the calibration temperature is generated in a specially
constructed surface insert and measured directly under the surface with an external
reference thermometer.
The reference thermometer also determines the temperature of the cold spots by integrating
the temperature over the sensitive length of the reference thermometer and can therefore
offer a true temperature calibration of surface temperature test specimens.
The surface insert is constructed in such a way that the included external reference delivers
the best possible results because the depth of the boreholes is adapted to the sensitive
length. If you need to make your own external reference for a comparison calibration, ensure
that the sensitive length is known and that it is situated in the middle of the calibration
surface
Surface insert and
exchange tool
