Brooks Instrument GF100 Serie Manual De Instrucciones página 48

Section 3 Operation
GF100 Series
Operating principles are listed below by following #1-5.
1. The GF125 uses a pressure transducer and support circuitry that sums the transducer signal in the sensor path
(transducer not included in the GF100 and the GF120). Incoming pressure fluctuation results in a signal that is
proportional to fluctuation.
2. The signal from the pressure transducer is inverted and then summed in with the original sensor signal.
3. The two summed signals cancel each other out.
4. The sensor signal that is applied to the microprocessor is undisturbed.
5. The flow of process gas is undisturbed by incoming pressure fluctuations.
Figure 3-1 GF100 Series Operating Principles
3-2
Installation and Operation Manual
X-TMF-GF100-Series-MFC-eng
Part Number: 541B137AAG
April, 2017