Xylem 19 001 300 R2 Silent Storm VFD Pumping System OMRON Touch Screen Display Manual - Manual (Page 82)

© 2013 Flowtronex
78 Omron Touch-Screen Display
· Optionally, press the Main Menu touch key to return to the Main Menu. (See also, Main Menu .)
· Optionally, press Back to return to the previous screen, N Register Access.
Calibrating a Krohne flow meter
A Krohne flow meter is an analog device. Calibration is very similar to the 220B with Analog
Transmitter (Model 310), except that the Krohne meter has a different table to use to determine the
maximum GPM @ 20 mA.
Krohne Meter Size
(Inches)
Max GPM
@ 20 mA
1 60
1.5 135
2 240
3 550
4 970
6 2200
8 3900
10 6100
12 8800
14 12000
There are two ways to calibrate the flow, with or without a 4-20 ma signal generator. It is a lot easier
with the signal generator.
Calibration Procedure with a signal generator
1) With no flow, record the counts in raw data (:22) and enter that value in Min Raw (:62) and MinIn
(:72).
2) Remove the Krohne meter input wires at the PLC and connect your signal generator.
3) Generate a 20 mA signal.
4) Record the counts in raw data (:22) and enter that value in MaxIn (:82).
5) Disconnect the signal generator and reconnect the Krohne meter wiring.
6) Enter 0 in MinOut (:92).
7) Use the Krohne Meter Calibration chart above. Select the correct Krohne Meter size. Go to the
Max GPM @ 20 mA column and record that number in MaxOut (:102).