12 Maintenance and Troubleshooting
SET REGULATOR PRESSURE WITH THE KEYPAD
The Purge fill pressure and cycle fill pressure are specified using Setup > Analysis Parameters. Set
the regulator pressure at the higher of the two (plus 2.0 psig). For example; if the purge fill pressure
is specified as 19.500 psig and the cycle fill pressure as 19.000 psig, then set the regulator pressure
at 21.500 psig.
1. Press Alt + 1 to enter Manual mode.
2. Press 8 (EXPAND) and 9 (VENT) to open the expansion and vent valves; the display will
show: X - O - O
3. Press 7 (FILL) to open the fill valve; the display will show: O - O - O
4. Adjust the regulator pressure control knob until the Purge fill or Cycle fill pressure, whichever
is higher, is shown on the regulator display.
5. Press 7 to close the Fill valve, then increase the regulator valve by 2.0 psig. The display will
show: X - O - O.
6. Allow the pressure in the pycnometer to drop below 2.0 psig, then press 8 and 9 to close the
Expansion and Vent valves. The display will show: X - X - X
7. Press SAVE to return to the Reload prompt.
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AccuPyc II 1345 Operator Manual
134-42851-01 (Rev A) — Jan 2021
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