DFA400 Rev0708
26
CALIRBRATION
The flowmeter is precalibrated and tested at the factory. Plumbing systems
are always unique and may cause small deviations in the factory calibration. It is
recommended that the flowmeter is checked after installation for accuracy and calibrated
when necessary.
Review the Programming Section procedures for using the Program Access
Mode.
Error Code E204
If error code E204 is shown, there is no signal from the flow sensor. This code
is displayed only when in a calibration program. Troubleshoot the sensor and the
associated wiring.
Note:
To calibrate the flowmeter, use a precalibrated water flow test kit
(connected to the discharge according to the instructions provided) or a
pitot gauge as a reference.
Flow Calibration, Single Point (Code 321)
Select a flow rate for calibration that is within the most commonly used discharge
flow range.
1. Enter code 321.
Result: The digital display shows flow rate with the last digit flashing.
2. Flow water through the discharge at the flow rate selected for calibration.
Ensure a constant pressure is maintained to obtain a steady flow rate.
3. 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.
4. 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.
5. Vary the water flow through the discharge and ensure the flow rate displayed
matches the reference. If there are differences at other flow rates, the multiple
point calibration may be necessary.
