Setup
Chapter Two: Installation
14
Electrical Information
The 722 transducer requires an external power source capable of supplying the voltages listed in
Appendix A: Product Specifications,
page 27. Noise and ripple should be less than 2 mV
(peak-to-peak) over a 10 kHz bandwidth. You may use any readout device capable of reading
from -0.6 V to 11 V. Refer to Figure 7 for the power, signal and chassis grounding scheme for a
voltage unit.
Note
The ground of any external power supply and readout should be the same
as the transducer ground (chassis ground) to minimize any possible
ground loops and power supply noise which can affect the performance
and stability of the system.
Readout
Power
Supply
+
-
0 to 10 V Pressure Output
Pressure Return
Power Return
10K
Note 2:
The absolute value of the potential difference between the chassis ground and
signal common/power ground should not exceed 14 Volts.
Note 1:
For best results, use a readout with fully differential inputs.
Multiple Ground
Tie-Point
0.3 F
µ
+13 to +32 V (for 0 to 10 V)
Chassis
Ground
Sensor Port
Figure 7: Electrical Scheme for a Voltage Unit
NW-16-KF Fitting Information
The NW-16-KF fittings are only available for units with full scale pressure of a maximum of
5000 Torr (100 psia).
Warning
Units with NW-16-KF fittings and a full scale range greater
than 1200 Torr (23 psi) require an HPS overpressure ring.
Operating the unit without a protective overpressure ring may
result in injury.
The HPS part number for the overpressure ring is HPS 10031.
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