Measuring Or Calibrating A Temperature Sensor; Testing Of Temperature Sensors; Cooling Down The Metal Block - WIKA CTD9100-ZERO Manual De Instrucciones

5. Commissioning, operation / 6. Cooling down the metal block

5.5 Measuring or calibrating a temperature sensor

1. All bores in the insert must be clean, undamaged and free
from any foreign bodies.
2. Test item and also the bore in the block must match
each other exactly so that the resistance to heat transfer
remains as low as possible.
3. For setting the temperature via the controller, see chapter
5.4 "Setting a set temperature".
4. If a set temperature has been controlled, wait until the
temperature has been reached and wait approx. a further
10 minutes so that a thermal equilibrium can be settled.
5. Then read or measure the test item.
6. Once the measurement has been completed, the
temperature dry-well calibrator can be allowed to cool.
(also see chapter 6 "Cooling down the metal block")
WARNING!
Risk of burns!
Before removing the temperature sensor or
test item, ensure that the temperature dry-well
calibrator has cooled sufficiently, otherwise
there is a serious danger of burns from both the
metal block and also the test item.
▶
In order that the metal block can be brought
quickly from a higher to a lower temperature,
set the set temperature to a lower
temperature (e.g. room temperature).
▶ Always cool the heated instrument under
50 °C (122 °F) before removing the
temperature sensor or test item.
▶
Never leave a heated instrument
unsupervised.

6. Cooling down the metal block

WARNING!
Risk of burns!
Before transport of or contact with the metal
block, ensure that the temperature dry-well
calibrator has cooled sufficiently, otherwise
there is a serious danger of burns from both the
metal block and also the test item.
▶
In order that the metal block can be brought
quickly from a higher to a lower temperature,
set the set temperature to a lower
temperature (e.g. room temperature).
▶
Always cool the heated instrument under
50 °C (122 °F) before disconnecting it from
the mains, switching it off or removing the
temperature sensor or test item.
▶ Never leave a heated instrument
unsupervised.
WIKA operating instructions temperature dry well calibrator, model CTD9100-ZERO
7. After cooling, pull the temperature sensor or test item out
from the metal block.

5.5.1 Testing of temperature sensors

To test temperature sensors, connect a separate temperature
measuring instrument to the test item. By comparing the
temperature displayed on the external measuring instrument
with the reference temperature, there is evidence of the
status of the test item. Here, pay attention to the fact that the
test item requires a short time until it reaches the temperature
of the metal block.
There is no possibility for calibrating grounded
thermocouples, since the heating block is
earthed and this would therefore lead to false
measurement results.
With a heating instrument, the built-in ventilator will
automatically slowly switch to higher speed, which will
provide a cooling airflow.
After switching off or removing the mains
connection, no cooling air will be provided
by the built-in ventilator. A sufficient thermal
decoupling between the metal block and case is
nevertheless ensured.
EN
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