Anton Paar TTK 600, Справочное руководство

Страница: 59 / 85

8 Performing a Measurement
D52IB001EN-G 59
sample surface can occur.
Ways to avoid this problem:
Measure in inert gas (e.g. He) instead of vacuum.
Make a slurry of the sample powder with a suitable
solvent, e.g. diluted Zapon lacquer.
Anton Paar GmbH offers a standard vacuum equip-
ment and a high vacuum equipment as an acces-
sory for the TTK 600. Refer to appendix D for
further information.
TTK 600 can be evacuated through the vacuum
flange or in combination with the gas/vacuum con-
nector and a ball valve depending on the experi-
mental requirements.
The ball valve (corner valve) is not included in the
vacuum equipment but can be ordered as an
accessory (refer to appendix D).
8.5.3 Operation with Gases Other than Air
Standard gases (beside air) for measurements with
TTK 600 are inert gases and nitrogen. Other non-
hazardous gases can be used, provided the gas it-
self and possible reaction products of the gas with
the sample material do not damage the sample
holder and the chamber in the complete tempera-
ture range of interest.
Gas can be supplied and extracted from the
TTK 600 through the gas/vacuum connector which
can be connected to the lid of the instrument.
If you need oxygen-free sample environment, com-
bine the gas supply system with a vacuum equip-
ment.
A typical gas supply system consists of:
• gas supply with pressure reducer and pressure
regulator
• gas hoses of appropriate materials
• vacuum equipment (if applicable)
TIP:
Anton Paar GmbH does not provide compo-
nents for gas supply systems.
NOTICE
Risk of damage.
To protect the vacuum equipment from pressure
a ball valve MUST be installed between gas/vac-
uum connector and the vacuum equipment.
BEFORE opening the gas inlet and applying
pressure the ball valve has to be closed as dam-
age of the vacuum parts will occur.
Vent the chamber slowly to avoid the sample
being detached from the sample holder.
Detailed information about the set-up for opera-
tion with vacuum are given in the instruction
manual for the vacuum equipment.
WARNING
Risk of injury.
Do not use TTK 600 with hazardous (e.g. explo-
sive or poisonous) gases. Use of these gases
can lead to an exposure to hazardous gases.
NOTICE
Risk of damage.
Check the chemical resistance of the sample
holder and the materials inside the chamber
against your sample and the applied atmosphere
up to the required maximum temperature
BEFORE the experiment.
Never operate the TTK 600 at temperatures
higher than 450 °C, when working under oxidiz-
ing atmosphere to avoid damage to the interior
of the chamber.
The gas inside the chamber expands when
heated. Above 3 bar rel. the gas will be released
through the overpressure relieve valve on the lid
of the instrument.
Use a suitable pressure regulator for the pres-
sure range 0 - 2 bar rel.
Temperature control of TTK 600 is optimized for
stationary gas filling of the chamber. A gas flow
through the chamber during heating/cooling will
deteriorate temperature control and cause a
temperature offset between sample holder tem-
perature (displayed) and sample surface.
NOTICE
Risk of damage.
To protect the vacuum equipment from pressure
a ball valve MUST be installed between gas/vac-
uum connector and the vacuum equipment.
BEFORE opening the gas inlet and applying
pressure the ball valve has to be closed as dam-
age of the vacuum parts will occur.