Inficon MPG400 - User Manual

Questions and Answers

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Jessica OliverAug 2, 2025
What to do if Inficon Test Equipment measuring signal is continually > 5 V or display > 10-3 mbar although vacuum pressure is OK?
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  Jill HopkinsAug 3, 2025
  If the measuring signal is continually above 5V or the display reads greater than 10-3 mbar even when the vacuum pressure is fine, here's what you can do: * Readjust the Pirani measurement circuit. If you can't adjust it, replace the Pirani element. * If you are measuring heavy gases, convert the reading using the appropriate formula. * Clean the measuring chamber to address severe outgassing.
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David MullinsAug 8, 2025
Why is the Inficon Test Equipment measuring signal unstable?
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  ihobbsAug 8, 2025
  The unstable measuring signal in your Inficon Test Equipment might be due to a contaminated gauge. To resolve this, clean the gauge.
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Craig RichardsonAug 15, 2025
What to do if the green lamp is ON and the identification indicates Pirani-only mode (measuring signal continually > 4.0 V) in Inficon Test Equipment?
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  Dale CarterAug 15, 2025
  If the green lamp is on, and the identification indicates Pirani-only mode with a measuring signal continually above 4.0 V, it could be due to: * The cold cathode discharge not igniting. Wait for the gas discharge to ignite. Note that in case of contamination with insulation layers, the cold cathode may completely fail to ignite. * The MPG has only been activated with p < 3×10—9 mbar. Try slightly increasing the pressure.
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Jennifer RochaAug 21, 2025
What to do if Inficon Test Equipment measuring signal continually > 9.5 V "Error high"?
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  Dr. Karen NunezAug 21, 2025
  If your Inficon Test Equipment shows a measuring signal continually greater than 9.5 V, indicating an "Error high," consider the following: * The Pirani measurement element may be defective due to filament rupture. Replace the Pirani element. * The electronics unit might not be correctly mounted. Ensure the electronics unit is properly mounted.
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Kimberly FieldsAug 27, 2025
How to fix Inficon Test Equipment measuring signal continually < 0.5 V "Error low"?
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  Paul RussellAug 27, 2025
  If the measuring signal on your Inficon Test Equipment is continually below 0.5 V, showing an "Error low", the cause might be no supply voltage. Turn on the power supply to resolve this.