After The Test Or The Calibration; Switch Test Function; Cooling Down The Metal Block - WIKA CTD4000 Betriebsanleitung

6. Commissioning, operation
The temperature difference is proportional to the
diameter of the test item and the diameter of the
bore in the insert.
The time the probes take to reach the set point is
much higher as the difference in diameter from
the probes and the holes is bigger.
EN

6.7.5 After the test or the calibration

WARNING!
Risk of burns!
High temperatures can lead to acute burns.
At the end of the calibration, do not pulled out
the temperature probe from the calibrator at high
temperatures.
▶
Cool down the calibrator, including the
temperature probe, so that thermal shock
is prevented, as described in chapter 6.9

"Cooling down the metal block".

▶
Before the calibrator is switched off, check
whether the temperature is almost the same
as the ambient temperature.
1. With the [▲] or [▼] button, enter the room temperature.
2. Confirm the entry with the [E] button.
Remove the insert from the calibrator after the use. Humidity
may cause verdigris to build up on the inside of the insert
within the metal block
⇒
In this case, the insert can become stuck.

6.8 Switch test function

With the "SWITCH TEST" function, it is possible to control
the open and close temperature of the thermostat:
1. Insert the thermostat sensor into a suitable bore in the
insert.
2. Connect the thermostat to the switch test input.
14
3. Switch on instrument.
4. With the [▲] or [▼] button, enter the set point, which
corresponds to T .
min
5. Confirm the entry with the [E] button.
6. With the [F] button, select the function SEt2.
7. With the [▲] or [▼] button, enter the set point T
8. Confirm the entry with the [E] button.
⇒
The temperature of the thermostat switch should be
between T and T
min max
9. With the [F] button, call the Grd (degrees per minute)
function.
10. With the [▲] or [▼] button, enter the value for the heating
rate of change.
⇒
Low values are preferable for a more accurate test
(e.g. values less than 1 °C per minute).
11. Confirm the entry with the [E] button.
The switch test LED will indicate the status of the switch:
The LED is lit = LED ON with switch closed
WIKA operating instructions, model CTD4000
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max
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