Micromeritics AccuPyc 1330, Operator'S Manual

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PERFORMING AN ANALYSIS
This chapter briefly describes how to perform an analysis. Chapter 4 de-
scribes in detail how to use all the functions of the AccuPyc 1330
Pycnometer.
The cell chamber and cap must be kept clean at all times. Particles on
the cap seating surface, in the sample cup, under the sample, or clinging
to the sample chamber wall may cause inaccurate results. Inspect the
cell and cap before each use. Use a lint-free cloth to remove any dust or
particles.
Setting Regulator Pressure
Before setting regulator pressure, make sure the tank pressure for the
gas regulator is at least 200 psig. Pressures less than 200 psig may cause
the sample to be inadequately saturated, resulting in inaccurate data or
termination of analysis.
Before beginning an analysis, check the regulator pressure. Fill pressure is
user-specified for purge and run using the AccuPyc 1330 Set Up function (re-
fer to Analysis or Calibration Parameters in Chapter 4. Set the regulator
pressure at the higher of the two (plus about 2.0 psig) as follows:
1.
Press to enter manual mode.
2.
Press (EXPAND) and (VENT) to open the expansion and
vent valves. When the valves are open, the indicators above the keys are
turned on.
3.
Press (FILL) to open the fill valve.
4. Set the regulator pressure control knob on the cylinder to the desired
pressure and then increase it about 2.0 psig.
5.
Press (FILL) to close the fill valve.
6.
Press to return to display mode.
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SAVE
AccuPyc 1330 Setting Regulator Pressure
September 1996 3-1