DFA400 Rev0708
27
Flow Calibration, Multiple Point (Code 322)
This function is used when the flow sensor is installed in a difficult plumbing
location where flow is not linear. It corrects for nonlinear flow to provide an accurate
flow rate display.
Select calibration points (up to 9) that are within the most commonly used
range.
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 E206
error code shows on the display.
1. Enter code 322.
Result: The digital display shows
Pt1
(program is ready to set the first
calibration point).
2. Flow water through the discharge at the flow rate selected for the calibration
point. Ensure a constant pressure is maintained to obtain a steady flow rate.
3. Press the
MODE
button.
Result: The display shows flow rate with the last digit flashing.
4. Adjust the displayed flow rate to match the reference flow rate.
The
MODE
button selects the digit to change. The digit will flash.
The
TOTAL
button changes the value of the flashing digit.
5. Press and hold the
MODE
button, momentarily press the
TOTAL
button, release
the buttons. The next calibration point is displayed. (If the buttons are pressed
too long, the program exits the calibration mode.)
Result: The display shows
Pt2
(or the next calibration point).
6. Repeat steps 2 through 5 for each flow rate to be calibrated.
7. To exit the calibration program:
Press both the
MODE
and
TOTAL
buttons and hold them until the display
shows four dashes. Release the buttons and enter a new code, or after five
seconds the program times out and returns to normal operation.
