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19. Dialog box will be displayed to confirm that the calibration was successfully completed. If the calibration fails,
it will need to be repeated.
20. Depressurize and disconnect the hoses from the calibration valve.
21. Switch the calibration valve back to normal position to direct the foam flow into the water way.
Low-Flow Foam Flow Calibration
Low-Flow Foam Flowmeter measures the flow of foam concentrate circulated back to the foam pump inlet when
low-flow is in use. Calibration of the meter is done by comparing volume of liquid measured by master foam flowmeter
and one flown through low-flow recirculation. Calibration can be done using water instead of foam concentrate.
ATTENTION: Do not calibrate the Injector Foam Flow Meter, if the Master Foam Flow meter is not calibrated.
The Master Foam Meter must have an accurate calibration before the injectors can be calibrated.
To perform this calibration operator needs to:
1. Make sure all display modules show OFF state.
2. Make sure the hydraulic system is running and PTO is engaged.
3. Using any AccuMax display module open main menu.
4. In main menu select MAINTENANCE item by pressing INCREASE or DECREASE buttons. Press
SELECT
button to access the submenu.
5. In MAINTENANCE submenu select the 'FOAM CAL. L-FLOW.' item using the
INCREASE
or
DECREASE
button. Press the
SELECT
button to start Low-flow foam calibration process.
6. Warning dialog box will be displayed; press
SELECT
button to continue.
7. Calibration screen will open:
8. ‘START / STOP’ item should be selected on the screen. If it is not use INCREASE or DECREASE buttons to
select it.
9. Press SELECT button to start measured flow. The icon on the right side of ‘START / STOP’ item will change
to indicating system is getting ready to run. After several seconds, the foam pump will engage and the low-
flow recirculation line will be open.
10. Let the system run until a substantial volume is accumulated, displayed as ‘MASTER VOLUME’. The larger
the volume the more accurate calibration will be.
11. When a sufficient volume is accumulated, press the
ON/OFF
button to stop flow. It may take up to 15 seconds
to stop flow and close all valves. When the system has stopped, the icon on the right side of the ‘START / STOP’
item will change to .