Flow calibration, multiple point (code 3220) – Elkhart Brass Unibody Valve User Manual
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5. Flow Calibration, Multiple Point (Code 3220)
This function allows for the display to be calibrated at multiple flow rates. It corrects for nonlinear
flow in difficult to plumb locations to provide an accurate flow rate display.
Note: There must be at least a 5% difference between each calibration point. If a selected
calibration point is too close to the previous point, an error code will show on the display.
Select flow rates to calibrate (up to 10 calibration points) that are within the most commonly used
flow range for the discharge. Start at the lowest flow rate and calibrate in order up to the highest.
Set up a reference flowmeter on the discharge.
Note: The valve must be closed and the red CLOSED LED must be on to start calibration of
the valve control.
1. Enter code 3220. (Refer to Programming section on how to enter a code.)
Result: The flow display will show Pt1 (the flowmeter program is ready to set the first calibration point).
2. Press the OPEN and CLOSE buttons to adjust the flow rate through the discharge at the flow
rate selected for the calibration point. Ensure a constant pressure is maintained to obtain a
steady flow rate on the reference flowmeter.
3. Press the PRESET button.
Result: The display will show a flow rate with the last digit flashing.
4. Adjust the displayed flow rate to match the reference flow rate.
Use the CLOSE button to select the digit to change. The digit will flash.
Use the OPEN button to change the value of the flashing digit.
5. Press and release the PRESET button.
Result: The display will show Pt2 (or the next calibration point).
6. Repeat steps 2 through 5 for each flow rate calibration point.
7. To exit the calibration program, press and hold the PRESET button.
Result: The display will show 4 dashes.
8. Release the PRESET button to exit the calibration program.
Result: The display will show flow reading.
9. Vary the water flow through the discharge and ensure the displayed flow rate matches the reference.