TA Instruments AR 2000, Руководство оператора, Страница: 104 / 144

AR 2000 Operator’s Manual
104
Running Experiments in External Pressurization
Mode
NOTE: If the maximum pressure of the external pressure source is greater than 138 bar (2,000
psi), ( e.g . N2 tank), the source must be regulated to a maximum value of 138 bar (2000 psi).
After the manifold is installed, all fittings have been tightened, and the sample has been loaded, follow these
steps to run an experiment in the external pressurization mode.
1. Make sure the three-way valve on the manifold is set to the OFF position (horizontal).
NOTE: The secondary pressure relief valve on the Pressure Gauge Port should only be opened
if the primary pressure relief passage becomes clogged. If this valve was opened, make sure
it is closed.
WARNING: Before applying high pressure, check for leaks at low pressure. Raise the
pressure of the cell, gradually, making frequent leak checks.
2. Regulate the external pressure source to the pressure required for the experiment. THIS PRESSURE
CANNOT EXCEED 138 bar (2,000 psi).
3. Gently pressurize the cell by slowly opening the three-way valve on the manifold to the pressure build
position (arrow pointing vertically downwards). Check the pressure cell to make sure there are no leaks.
If it is free from leaks at low pressure, raise the pressure gradually, making frequent leak checks using a
liquid leak test material.
4. During operation, the pressure cell should be isolated from the high-pressure source. Set the three-way
valve on the manifold to OFF (arrow horizontal), and relieve the pressure in the line between the high-
pressure source and the connector block. If the cell is free from leaks, the pressure in the cell will be
maintained.
WARNING: During operation, isolate the pressure cell from the high-pressure source,
and relieve the pressure in the line between the source and the manifold.
5. Set the testing temperature from the software.
6. Program the test procedure.
7. Run the experiment.
8. After running the experiment, depressurize the cell by following these steps:
a. Ensure the the pressure cell is isolated from the high pressure source.
b. When the experiment is complete, the temperature should be set back to 25°C (ambient temperature)
before attempting to relieve the pressure in the cell.