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Manual: 147-082010_HPM-760-Plus-Vacuum-Gauge Page 12 of 16
4. Calibration
4.1. Hastings 760 Plus Piezo Transducer Zero and Span Adjustment
1. Install the transducer and power supply/display then apply operating power. Wait a mini
mum of 15 minutes before proceeding.
2. Evacuate system to a pressure less than 0.010 Torr (1.00E-02 Torr).
3. Adjust transducer zero trimpot (Fig. 2-1) until the power supply/display
indicates 000.0 ±000.1 Torr.
4. Increase system pressure to atmosphere and adjust span trimpot until the power supply/
display indicates the known local atmospheric pressure ±000.1 Torr.
5. Repeat steps 2 through 4 if necessary.
4.2. Hastings 760s Option-5 Transducer Zero and Span Adjustment
1. Install the transducer and apply operating power. Wait a minimum of 15 minutes before
proceeding.
2. Evacuate the system to a pressure less than 0.01 Torr (1.00E-02 Torr).
3. Adjust transducer zero trimpot (Fig. 2-1) until display indicates 000 ± 001 Torr.
4. Increase system pressure to atmosphere and adjust span trimpot (Fig. 2-1) until display
indicates the known local atmospheric pressure ±001 Torr.
5. Repeat steps 2 through 4 if necessary.