Anton Paar HTK 1200N, Справочное руководство

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8 Operation
B40IB006EN-D 37
.
8.3 Operation under Vacuum
Dependent on your actual measuring problem, it
may be necessary to evacuate the chamber. A vac-
uum of approx. 10
-4
mbar can be reached in the
HTK 1200N with a turbo-molecular pump.
Anton Paar GmbH offers a vacuum equipment as
an option for the HTK 1200N. For further informa-
tion refer to
Appendix E .
The evacuation of the chamber is performed
through the vacuum flange in the lid or through the
adapter axis.
Keep the following sequence, when starting the op-
eration of the HTK 1200N under vacuum:
1. Mount the sample and insert the sample holder
flange into the chamber, as described in chapter
7.1 and chapter 7.2.
2. Apply vacuum.
3. Switch on the cooling water circuit.
4. Switch on the temperature controller and set the
required sample temperature.
.
NOTICE
Risk of damage
Make sure that the HTK 1200N is fully installed,
refer to
chapter 4 , before switching on the
CCU 1000 Combined Control Unit.
Always operate the HTK 1200N with the cooling
water circuit on!
Refer to Appendix B for detailed information on
the requirements for cooling water quality.
Take care that the cooling water hoses are pro-
tected against unintentional disconnection!
Do not exceed a maximum cooling water pres-
sure of 4 bar!
Check the flow controller of the CCU 1000 peri-
odically for proper functioning.
CAUTION
Hot surface
During operation and even after turning off the
instrument, temperatures at the sample holder
can reach up to 1200 °C. Make sure that the
sample holder is at room temperature before
handling it.
NOTICE
Risk of damage
Check the chemical resistance of the materials
in the HTK 1200N BEFORE the experiment.
NOTICE
Risk of damage
Always operate the HTK 1200N with the cooling
water circuit on!
Take care that the cooling water hoses are pro-
tected against unintentional disconnection!
Do not exceed a maximum cooling water pres-
sure of 4 bar!
Check the flow controller of the CCU 1000 peri-
odically for proper functioning.
NOTICE
Risk of damage
Make sure that the HTK 1200N is fully installed,
refer to
chapter 4 , before switching on the
CCU 1000 Combined Control Unit.
Make sure that venting of the chamber is carried
out slowly to prevent that the sample is detached
from the sample holder.
Venting of the chamber should be carried out
shortly before turning off the vacuum pump to
prevent oil from being sucked back into the vac-
uum hose and even into the chamber.
Take care that all gas connectors are sealed by
temporary covers.
At the surface of the Kanthal heater an oxide
layer is formed which protects the wire.
After work in vacuum or inert gas, it is recom-
mended to regularly regenerate this oxide layer
by simply heating the HTK 1200N up to 1000 °C
in air. This will extend the life time of the heater
considerably