MKS Baratron 740C, Manual, Page: 42 / 84

Setup Chapter Two: Installation
32
Electrical Information for a Voltage Unit
The 7xxC-series transducers require an external power source capable of supplying the voltages
listed in
Appendix A: Product Specifications, page 65. 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 9, page 32, 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.
Figure 9: Electrical Scheme for a Voltage Unit
Readout
Power
Supply
+
-
0 to 5 V or 0 to 10 V Pressure Output
Pressure Return
+10.8 to +32 V (for 0 to 5 V)
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

+13 to +32 V (for 0 to 10 V)
or
Chassis
Ground
Sensor Port