Xylem 19 001 300 R2 Silent Storm VFD Pumping System OMRON Touch Screen Display Manual - Manual (Page 83)

© 2013 Flowtronex
How Do I? 79
· 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.
Calibration Procedure without a signal generator
Without a signal generator, the calibration procedure is much more difficult, less accurate, and
requires a calculator.
1) With no flow, record the counts in raw data (:22) and enter that value in Min Raw (:62) and MinIn
(:72).
2) Enter 0 in MinOut (:92).
3) Run pump station in as close to a full flow condition as possible. The higher the flow, the more
accurate the calibration.
4) Record the counts in raw data (:22) and enter that value in MaxIn (:82).
5) Measure mA signal in series with positive input to the analog board. Write this number down.
6) Subtract 4 mA from this reading. Write this number down.
7) Use the Krohne Meter Calibration chart above. Select the correct Krohne Meter size. Go to the
Max GPM at 20 mA column and record that number.
8) Divide the max GPM by 16 and write down that number.
9) Multiply that number (GPM per mA) by the adjusted mA reading from step 5.
10) Enter this number in MaxOut (:102).
Example:
You have a pump station with an 8 in flow meter spool. Therefore the maximum GPM @ 20 ma is
3000 GPM.