Pfeiffer Vacuum PrismaPro QMA 250 F1, Translation Of The Original

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10.1.3 Remedying operating and measuring errors
Symptom / malfunction
messages
Possible causes Remedy
Peak detection error
(Peak detection error) No peak for the target mass ● Load the settings from the test report.
● Contact Pfeiffer Vacuum Service .
Peak for target mass too small/
broad
● Load the settings from the test report.
● Contact Pfeiffer Vacuum Service .
Peak out of detection ● Load the settings from the test report.
● Contact Pfeiffer Vacuum Service .
Range of target mass (e.g. peak
shift > +/- 0.40 u of rated value)
● Load the settings from the test report.
● Contact Pfeiffer Vacuum Service .
No spectra
(No spectra) Emission off ● Switch on the emission.
electron multiplier is switched on,
although Faraday mode is selected
● Switch the EM off.
Pressure or signal too low for Fara-
day detector
● Switch the EM on.
Electron multiplier voltage too low ● Increase the EM voltage.
No sensitivity, analyzer contaminat-
ed
● Refer to the operating and measuring error
"Low sensitivity".
Electronic unit (QME) not attached
to the analyzer correctly
● Make sure that the electronic unit (QME) has
been completely pushed onto the analyzer .
● Ensure that the contacts are straight and are
not bent or damaged.
Mass calibration faulty ● Set new mass positions and resolution (tuning).
High-frequency error ● Refer to the hardware error "HF error".
Mass filter error ● Refer to the hardware error "Mass filter error".
EM defective ● Contact Pfeiffer Vacuum Service .
Error in the electronic unit (QME) ● Contact Pfeiffer Vacuum Service .
DSP communication error ● Contact Pfeiffer Vacuum Service .
Low sensitivity
(Low sensitivity) Analyzer contaminated ● Degas the ion source.
● Bake out the analyzer.
● Replace the filament unit and/or the ion source.
● Replace the analyzer.
● Contact Pfeiffer Vacuum Service .
Mass calibration (resolution) faulty ● Recalibrate the device (tune)
● Increase the peak width.
Analyzer operating parameters set
incorrectly
● Contact Pfeiffer Vacuum Service .
Mass filter defective or contaminat-
ed
● Contact Pfeiffer Vacuum Service .
Ion source or analyzer magnetized ● Rectify the cause of the magnetic fields.
Ion source or analyzer in close
proximity to magnetic fields
● Rectify the cause of the magnetic fields.
Incorrect total pressure measure-
ment with external gauges
● Ensure correct calibration of the gauge being
used for sensitivity calibration.
System pressure too low ● Increase the sample pressure, if possible.
Error in the electronic unit (QME) ● Contact Pfeiffer Vacuum Service .
Gain of electron multiplier too low ● Bake out the analyzer.
● Replace the analyzer.
● Contact Pfeiffer Vacuum Service .
Malfunctions
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