Micromeritics MIC SAS II 5800 Operator's Manual page 52

7 Troubleshooting and Maintenance
One or both pressures read close to zero during analysis.
Cause: No air supply.
Action: Ensure that the air cylinder valve, and any shutoff valves are open. Check that the reg-
ulator is set properly. Check that the air line is connected.
Cause: There is a leak or blockage in the system.
Action: Ensure the piston is engaged in the tube. Ensure the air outlet tube on the top of the
moving piston mount is connected. Check the integrity of the O-rings. See
on page 7 -
Piston does not move.
Cause: The piston may be stationary for minutes at a time during analyses, and some piston
motions are barely large enough to see, but if analysis does not progress for a long
time, it's possible that the piston motor has become overloaded.
Action: Go to the Instrument view and tap the stop icon (white square in a blue rectangle. If
the piston is still unresponsive, cycle power on the instrument.
Cause: The emergency stop button was pressed.
Action: Reset the emergency stop. The button shuts off power to the motor, so a home oper-
ation must be performed.
Pressures are not steady during analysis.
Cause: O-rings are worn.
Action: Check the integrity of the O-rings. See
Sample mass cannot be made equal to its absolute density.
Cause: A limited amount of sample is available, or the sample has a very low bulk density and
very high absolute density.
Action: Some standards require mass and density to be equal, however accurate meas-
urements may be possible with less sample. Be sure to enter the actual mass and
density. A warning that mass and density differ by more than 5% is shown, but the
analysis can still be started.
7 - 2
9.
O-rings on page 7 - 9.
MIC SAS II 5800 Operator Manual
580-42800-01 (Rev - ) — June 2019
O-rings