Micromeritics TRISTAR II PLUS - Troubleshooting Valve Operation; Troubleshooting Noisy Vacuum Pump

11 Troubleshooting
Cause B: Gas may be contaminated.
Action B:
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Perform a blank analysis. If results are good, perform a reference material
analysis.
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Replace tank.
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Check for line leak, which could cause contamination.
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Flush the lines occasionally to help prevent contamination.
Cause C: Incorrect type of gas line.
Action C: Ensure the gas line is all metal. It is best to use the one shipped with the ana-
lyzer. Do not use polymer gas lines or flexible gas lines that may be coated
internally with a polymer.
Valves cannot be operated.
Cause: Cable from computer to the instrument is loose.
Action: Reconnect the cable.
Vacuum pump is noisy.
CauseA: Sample tube connector is loose.
Action A: Tighten fitting. Replace O-ring.
CauseB: Sample tube O-ring is worn or cracked.
Action B: Replace O-ring. See Sample Tube O-ring Replacement on page11 - 19.
CauseC: Sample tube is cracked.
Action C: Replace with new sample tube.
CauseD: No sample tube loaded on a selected port.
Action D: Install plug or empty sample tube.
CauseE: Gas inlet valve open while vacuum valve open.
Action E: With manual control enabled, use the instrument schematic to close gas inlet
valve.
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TriStar II Plus Operator Manual
303-42800-01 (Rev M ) — Sep 2023