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Manual: 147-082010_HPM-760-Plus-Vacuum-Gauge Page 9 of 16
3.2. Piezo Transducer Input Power
The 760s piezo transducer operates with a DC input from 15 to 30 volts. Use the 4-pin female
connector supplied and makes necessary connections as outlined. See illustration in Section 2 of this
manual.
3.3. Piezo Transducer Output Signal
The 760s piezo transducer provides either a linear DC voltage output with pressure or a linear DC
current output with pressure. The type of output is determined by the instrument option specified. A
brief description of the option, pressure range and output signal is listed below:
OPTION No PRESSURE RANGE SIGNAL OUT
(Torr) (see note
01 0-1000 0-5 VDC
02 0-1000 0-10 VDC
03 0-1000 2-10 mA
04 0-1000 4-20 mA
05 0-1000 0-5 or 10 VDC
w/LCD Digital Display
NOTE: The 760 Plus power supply/ display or the 760s option-05, provide a direct pressure
readout in Torr units.
3.4. Power Supply/Display Input Power
The 760 Plus power supply/display must be connected to a source of AC voltage, either 120 or 240 V,
before attempting to program or setup the unit for operation with the Hastings 760S piezo vacuum
transducer (see Section 2.3 for cable description).
3.5. THPS-760 Power Supply Physical Layout
3.5.1. Front Panel (Refer to page 19, 7.1.1 for physical layout.)
Digital Display.
The THPS-760 has a 4 1/2-digit display that displays continuous readout.
Set Point Adjustment Pots.
Two Set Point Adjustment Pots are accessible on the panel and are used to set the desired set points.
(SP1/SP2) Refer to SET POINT ADJUSTMENTS and figure 1 for specific instructions pertaining to
setting the set points.
THE KNOBS ON THE SET POINT ADJUSTMENT POTS ARE PERMANENTLY
INSTALLED AND CAN NOT BE REMOVED. REMOVING THEM COULD CAUSE
PERMANENT DAMAGE TO THE SET POINT POTS.
Set Point Pushbuttons.
There are two set point pushbuttons (SP1 AND SP2) accessible on the front panel. When depressed,
the setpoint value is displayed on the LED readout
SET POINT LED’s. The two LED indicators (SP1 and SP2) will illuminate when the input pressure
is less than desired (SP1/SP2) set point. The LED’s indicate the corresponding relay is activated
(energized).