12
Installation and Operation Manual
3. Select the discharge to be calibrated: A, B, C or D
by depressing the B FLOW button until the light
under the selected discharge is illuminated. If a
number other than ZERO shows on the control
module display, reset
the display by depressing both C FLOW and
D FLOW buttons simultaneously.
4. Establish water flow and collect the discharge in a
container of 250 gallons (946 liters)
or larger.
5. When the water flow is stopped and the total
volume of water collected is determined, adjust the
reading to match this value by pressing the C
FLOW or D FLOW buttons on the FoamPro
MultiFlo Control Module until the correct reading
shows on the control module display.
6. Repeat steps 2 through 5 for all other discharges
equipped with paddlewheel flowmeters.
7. Exit calibration mode as previously described to
lock the adjustments into the memory of the
FoamPro MultiFlo control module microprocessor.
Replace the o-ring and the cover screw to prevent
water and dust from entering the control module.
8. Proceed with the FoamPro foam proportioner
system calibration per the applicable manual.
Total Volume Method of Calibration
If a pitot gauge is not available, the total volume method
of calibration may be used.
NOTE: This method is intended only as a
temporary method of calibration since many
factors can create errors in measuring volume.
Some of the more obvious causes of error are:
• Water tank volumes may vary by as much as
±15% from their rated size.
• The fill level of a tank can significantly vary the
volume as will the amount of water left in the tank
when the pump begins to cavitate.
NOTE: As soon as a pitot gauge is available,
recalibrate the system using the flow method of
calibration to ensure optimal results and
accuracy.
1. Enter calibration mode as previously described.
The total indicator must be illuminated when total
volume method of calibration is used. Press the “A
FLOW” button to light the “TOTAL” indicator
showing the control module is set for total volume
calibration method.
2. Connect a discharge hose to the flowmeter
equipped discharge to be calibrated and secure the
other end of the hose in a container with a known
volume.
