Calibrator For Surface Temperature Sensors - Omega TCL-3M165E2 Series User Manual

Commissioning and operation

4.3.3 Calibrator for surface temperature sensors

Type
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 3 mm •
1 x 3.1 mm • 1 x 4.5 mm / 1 x 0.12 in • 1 x 0.12 in •
1 x 0.18 in). 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.
External reference sensor (optional):
 Align the surface insert so that the hole for the external
reference sensor is located at 12 o'clock.
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
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TCL-3M165E2

Series TCL-3M165E2
Surface insert and
exchange tool