Regulator Pressure - Micromeritics ACCUPYC II 1345 Operator's Manual

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EGULATOR RESSURE
Tank pressure should be at least 200 psi above regulator pressure. Pressures less than
200 psig indicate the tank is low on gas. Analyses are terminated automatically if gas is
depleted.
For a high pressure sample chamber configuration, set regulator pressure 20 psi above
cycle and fill pressure.
S R
ET EGULATOR
The Purge fill and Cycle fill pressures are specified in Analysis Conditions. Set the regulator
pressure at the higher of the two, plus 2.0 psig. For example; if the Purge fill pressure is set to 19.500
psig (134.445 kPag) and the Cycle fill pressure as 19.000 psig (131.000 kPag), set the regulator
pressure at 21.500 psig (148.237 kPag).
1. Go to Unit [n] > Enable Manual Control. Ensure a checkmark displays to the left of the
menu item. If the analyzer schematic does not display, go to Unit [n] > Show Instrument
Schematic.
2. On the schematic, right click the Expansion and Vent valves and select Open for both. Then
open the Fill valve.
3. Adjust the regulator pressure control knob until the Purge fill or Cycle fill pressure, whichever
is higher, is shown on the regulator display. Tank pressure should be at least 200 psi above

regulator pressure.

4. On the schematic, close the Fill valve, then increase the regulator pressure by 2.0 psig (13.8
kPag).
5. Allow the pressure in the pycnometer to drop below 2.0 psig, then close the Expansion and
Vent valves.
AccuPyc II 1345 Operator Manual
134-42851-01 (Rev A) — Jan 2021
P
RESSURE WITH THE
A. Gas tubing to instrument
B. Gas regulator shut-off valve
C. Low pressure gauge
D. High pressure gauge
E. Gas cylinder shut-off valve
F. Regulator connecter nut
G. Regulator control knob
H. Brass reducer fitting
S
OFTWARE
Regulator Pressure
12 - 15