Fluid Components International FR73B Complete Manual User Manual
Page 5
FR78B Flow Switch/Monitor
FLUID COMPONENTS INTERNATIONAL LLC
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5
Doc. No. 06EN003281 Rev. A
Figure 2 - Setting Alarm Switch Point
Figure 3 - Control Circuit 5181 Outline Drawing
Creating a Calibration Curve Using an FM71 Calibrator
1.
Apply power to the instrument and establish a constant flow rate in the pipe for the first data point to be taken. Let the
instrument stabilize for 10 minutes.
2.
Attach an FM71 meter to the control circuit. Dial in the balance number found near the edge of the control circuit. The read out
/calib. switch should be in the read out position. Record the flow rate versus the meter readout.
3.
Repeat steps 1 and 2 at different flow rates. Record enough flow points to be able to make a millivolt versus flow curve.
To set a switch point, use the instructions that come in the FM71 manual.