Granville-Phillips 307 Repair and Calibration
Ion gauge controller and its modules
Granville-Phillips no longer supports the 307. We still repair and calibrate it.
- A 270, 280 or 275 Convectron, or another Granville-Phillips model: Vacuum Gauge Controller Repair.
GP 307 part numbers
- 307001
- 307004
- 307005
- 307006
- 307090
- 307215
- 307392
- 307501-D1B-T1
- 307502-01B-T1
- 307508-01B-T1
Calibration only
Nothing broken, but calibration due? We calibrate the 307 on its own, traceable to NIST: Calibration.
Power supply and gauge module
Send one module or both; we quote each on its own.
What usually goes wrong
- Readings that drift or are wrong
- No filament or no degas
- A blown fuse
- A bad display
- A damaged IG connector
- It will not turn on
- Fire or water damage
We adjust every unit during testing, and calibrate the ones that need it.