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Manual: 153-082010_HPM 4-6 Vacuum Gauge Page 11 of 12
6.1. Authorized Maintenance
The HPM 4/6 Power Supply/Display does not require maintenance other than routine battery
replacement and calibration.
Note: A low battery will be indicated by “LOBAT” appearing in lower left corner of LCD
display.
In the unlikely event that the HPM4/6 fails or is damaged, only qualified Teledyne Hastings
personnel should attempt repair. If the HPM4/6 should require service, the unit may be returned by
first obtaining an RMA (Return Material Authorization) number from our Customer Service
Department at 1-800-950-2468.
Refer to Section 7 last page.
Instrument repair should only be performed by Teledyne Hastings service technicians.
Contact with harsh solvents and chemicals to any plastic parts of the HPM 4/6 Vacuum
Gauge can damage the unit and may void the warranty.
6.0 Maintenance