First Commissioning; Operating Position; Switching On The Calibrator; Setting A Set Temperature - WIKA CTD4000 Betriebsanleitung

6. Commissioning, operation

6.3 First commissioning

To avoid any smell in the room it is better to switch on the
calibrator outside the room for the first time.

6.4 Operating position

The operating position of the temperature dry-well calibrator
is in the vertical orientation, since this guarantees an optimal
EN
temperature distribution in the metal block.
▶
Place the temperature dry-well calibrator on a clean and
even surface so that the fan on the bottom is not blocked
and sufficient fresh air can be drawn in.
Insufficient ventilation can lead to damage to
the calibrator. Therefore, make sure that there is
enough space around the temperature dry-well
calibrator and that the air can circulate.

6.5 Switching on the calibrator

1. Connect to the mains using the mains connector supplied.
⇒
Ensure that the correct voltage is present when doing
this.
⇒
Make sure that the instrument has been correctly
grounded.
2. Switch on the mains switch.
The controller will be initialised. After approx. 5 secs, the
initialisation will be complete and the calibration mode will
automatically be displayed.
The lower display will show Stby.

6.6 Setting a set temperature

1. Insert the insert into the equalising block
⇒
Make sure that it does not get caught.
2. Insert the thermometer to be tested into the sleeve.
⇒
Here, also ensure that this doesn't get caught.
3. With the [▲] or [▼] button, enter the set point.
4. Confirm the entry with the [E] button.
The built-in heating or cooling elements will temper the metal
block automatically from room temperature to the controller's
set temperature.
If the temperature has stabilised, this will be shown by the
STABILITY-LED blinking in the lower right of display 1.
12

6.7 Testing or calibrating temperature probes

WARNING!
Risk of burns!
Touching the hot metal block or the test item can
lead to acute burns.
▶ During the use of the calibrator, do not touch
the upper grille, the inserts or temperature
probes because they may be very hot.

6.7.1 Testing of temperature probes

To test temperature probes, 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.
At the end of the test, DO NOT remove the probe while it is
still at high temperature. First. cool the calibrator while the
probes are still inserted, see chapter 6.9 "Cooling down the
metal block".
Before returning the calibrator to its case make sure that,
the temperature of the block is almost the same as ambient
temperature.

6.7.2 Calibrating temperature probes

Calibrations with a temperature dry-well calibrator can be
performed with the internal reference of the calibrator. Should
a better accuracy need to be achieved, working with an
external reference is required. With the second option the
external reference and the test item should be located on the
same height and near together.

6.7.3 Positioning the temperature probe

Insert the temperature probe, together with the matching
insert, into the temperature dry-well calibrator.
The insert is manufactured from aluminium or brass and has
one or more holes so that a large number of temperature
probes can be calibrated in this insert. This insert has the
function of distributing the temperature evenly.
It is therefore also possible to calibrate temperature probes
with different lengths so long as the depth of the holes has
been adjusted.
▶
After setting up the calibrator, insert the insert carefully
into the holder.
⇒
Ensure that no dirt or other foreign materials can get
between the block and the insert.
WIKA operating instructions, model CTD4000