Infrared Insert (Only Ctm9100-150) - WIKA CTD9100 Serie Betriebsanleitung

6. Commissioning, operation
6.4 Surface insert (only CTM9100-150)
The operation of the calibrator with the surface insert is
suited to a simple and the most accurate calibration possible
of surface probes.
Fit the insert, which is hollow and long from the bottom, into
the block using a special replacement tool.
The sleeve also has three bores (1 x 3 mm, 1 x 3.1 mm and
1 x 4 mm [1 x 0.12 in, 1 x 0.12 in and 1 x 0.16 in]) directly
under the surface, so that the correct surface temperature
can be controlled at all times.
Following use, the inserts should be removed using the
specific replacement tools and then the sleeve and block
should be cleaned. This prevents the sleeves becoming
jammed in the heating block.
The calibration of surface thermometers is very
difficult and not fully defined. Thermometers
mounted on surfaces dissipate heat from
the surface and create a cold zone on the
surface being measured. In the multi-function
calibrators, the calibration temperature is created
in a specially designed surface insert and an
external reference thermometer measures the
temperature directly under the surface. The
reference thermometer also determines the
temperature of the cold zone through integration
of the temperature along the sensitive length of
the reference thermometer and thus provides
a true temperature calibration of surface
temperature sensors.
The sleeve is designed so that the supplied
external reference provides the best possible
result, since the depth of the bore is adjusted
to the sensitive length. If a separate external
reference is used for comparison calibration,
ensure that the sensitive length is known and it
lies in the centre of the calibration surface.
Surface insert
WIKA operating instructions, models CTD9100, CTB9100, CTM9100

6.5 Infrared insert (only CTM9100-150)

The operation of the calibrator with the infrared insert is
suited to a quick and simple calibration of non-contact
thermometers.
Fit the hollow and specially-designed insert into the
block using a special replacement tool. The sleeve also
has two bores in the edge (1 x 3.5 mm and 1 x 4.5 mm
[1 x 0.14 in and 1 x 0.18 in]) for the accurate monitoring of the
temperature.
The design and surface finish of the sleeve is important, in
order that a defined emissivity of 1 is achieved.
Following use, the inserts should be removed using the
specific replacement tools and then the sleeve and block
should be cleaned. This prevents the sleeves becoming
jammed in the heating block.
With temperatures of < 0 °C [< 32 °F] and higher
air humidity, ice or dew can form in the insert.
This can falsify the calibration. By capping the
measurement opening, the ice or dew formation
can be strongly reduced.
Leave the measurement opening closed as
■
long as possible
Open the measurement opening for a short
■
while for the measurement
Remove any ice or dew present by heating
■
Insert for infrared measurements
EN
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