12 Maintenance and Troubleshooting
Action B: Test the outlet. If there is no power, contact electrician.
Cause C: Plug prongs bent so that contact not made at outlet.
Action C: Unplug the power cable and re-plug into outlet. If indicator does not illuminate,
have electrician adjust prongs or replace outlet or plug.
Cause D: Power cord damaged.
Action D: Have electrician check cord using test meter. Replace if defective.
Cause E: Loose internal connection, broken wire, or failure of internal power supply.
Action E: Contact a Micromeritics Service Representative for repair or replacement
information.
Specified pressure not reached or maintained.
Cause A: Chamber cap not properly closed.
Action A: Close chamber cap by turning fully clockwise.
Cause B: Chamber cap contains dust or debris or the O-ring is not properly greased.
Action B: Using a lint free tissue, clean the chamber cap and the rim of the cell chamber.
Lightly grease the chamber cap O-ring. See Chamber Cap O-Ring on
page12 - 5.
Cause C: The chamber cap O-ring is not properly seated.
Action C: Check the chamber cap. Ensure that the O-ring is properly seated and that it
contains no scratches or cuts.
Cause D: The chamber cap O-ring is cut or scratched.
Action D: Replace the O-ring in the chamber cap. See Chamber Cap O-Ring on
page12 - 5.
Cause E: Gas leaks in the cell chamber or expansion chamber.
Action E: Check the pycnometer for leaks. SeeCheck the Cell and Expansion Cham-
bers for Leaks on page12 - 7.
Cause F: The helium tank is low on gas or empty. Tank pressure should be at least 200
psi above regulator pressure.
Action F: Check tank. Minimum recommended pressure is 200 psig above regulator pres-
sure. See Regulator Pressure on page12 - 15.
Cause G: The shut-off valve on the gas cylinder is closed.
Action G: Ensure that the valve is open.
Cause H: The Zero offset (of pressure transducer) is too low.
12 - 2
AccuPyc II 1345 Operator Manual
134-42851-01 (Rev A) — Jan 2021
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