Brooks Instrument Mfi Series - Manual (Page 33)

3-5
Brooks ® Mf Series
Section 3 Operation Installation and Operation Manual
X-TMF-Mfi-Mfx-MFC-eng
Part Number: 541B074AAG
August, 2009
f. Connect the DVM positive lead to TP1 (100x sensor voltage) and the
negative lead to TP4 (circuit common). The setpoint should still be set
at 100% flow (5.000 V). Measure the flow rate using a suitable
volumetric calibration equipment. To adjust the controller to the proper
full scale flow, calculate a new TP1 voltage using the following
equation:
Adjust the span potentiometer until the voltage at TP1 is equal to the
value calculated above. Recheck the flow rate after the flow has
® TM
SERIES
Span
Linearity
Anticipate
Zero
Test Points:
TP4 Circuit Common
TP3 Valve Voltage
TP2 Lin. Voltage
TP1 Sensor Voltage
(x 100)
Figure 3-4 Adjustment Potentiometer Location
Figure 3-3 Mf Series Calibration Connections