Granville-Phillips 330 Repair and Calibration
GP 330 ionization gauge controller
Granville-Phillips no longer supports the 330. We still repair and calibrate it.
- Another Granville-Phillips model: Vacuum Gauge Controller Repair.
Calibration only
Nothing broken, but calibration due? We calibrate the 330 on its own, traceable to NIST: Calibration.
GP 330 part numbers
- 330001
- 330002
- 330020
What usually goes wrong
- Readings that drift
- No filament
- A blown fuse
- A bad display
We adjust every unit during testing, and calibrate the ones that need it.