(408) 744-9040
(408) 744-9040
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RGA Tech Support

If you are experiencing trouble with your RGA you can either send your instrument back to SRS for service, or you can try and fix the problem yourself. If you wish to send the instrument back now click here.

If you wish to try and fix the problem yourself, the following troubleshooting guide may help you.

Troubleshooting Guide

Symptom 1 — Analog scan only displays noise around 10-9  Torr

Most likely the repeller cage is shorting to your vacuum chamber. The solution is to remove the repeller cage and operate without it. You can easily remove it by unscrewing it from the ionizer.

Another possibility is that the filament is damaged. Measure the resistance between the filament supply and return pins of the feedthru flange (click here for picture ). A healthy filament will have a little less than an ohm of resistance. If you measure a very high resistance, the filament most likely needs replacing. You can order a replacement filament by clicking here.

If the ionizer appears dirty or coated, you may wish to replace the whole ionizer (which includes the filament). You can order a replacement ionizer kit by clicking here.

Symptom 2 — Analog scan looks noisy after replacing the filament and removing the repeller cage.

Most likely your ionizer is contaminated and needs replacing. There are instructions in the manual on how to replace an ionizer. You can order a replacement ionizer kit by clicking here.

Symptom 3 — No communication with PC

Try connecting with the RGA COM program (it's in the same program group as the main RGA Windows program). On connection, send command "ID?" and hit enter. If you see an ID string returned, then there is probably a short between ground and one or more of the pins of the feedthru flange.

Symptom 4 — When powering on an RGA300, a red warning indicator on the ECU lights, and a software message says mass range is limited.

Click here to download a detailed explanation and solution.

Symptom 5 — Operating the RGA with the filament turned off

Click here to download instructions on operating the RGA with the filament turned off.

Symptom 6 — Option 2 Built-in Power Module needs installing

Click here to download instructions on installing option 2.


If you are still having trouble your RGA, it will need to come back to SRS for service. Click here to get an RMA number.

About SRS       Phone: (408) 744-9040