Dickey-John Flex4, Operator'S Manual

Page: 112 / 152

4.
OPERATOR’S MANUAL
NOTE: Pressing “S” stops the
calibration and values default to
the original settings.
GRANULAR CALIBRATION ADJUSTMENTS
If small but consistent application rate errors are observed over a period of
time, the spreader constant can be modified to improve application
accuracy. Refer to Appendix A for steps to re-calculate a new spreader
constant. This constant can be manually entered on the Granular
Configuration screen. A granular calibration routine can also be repeated to
correct this type of APR error.
LIQUID DROP TEST CALIBRATION (F6)
A Liquid Drop Test Calibration determines a flow meter constant (K Factor)
for each liquid material used. The K Factor represents the number of pulses
generated by the flow meter per gallon of liquid dispensed. The nozzle
constant is a measure of flow rate through the nozzle at a standard
pressure. Separate calibrations are necessary for each liquid material
because of viscosity differences.
The liquid drop test routine causes the control system to run the liquid pump
dispensing material while the vehicle is stationary. When a sufficient amount
of liquid has been discharged, the system is stopped and the discharged
liquid weighed, and the amount entered at the Calibration screen. The
system then calculates, stores, and displays the K Factor.
DROP TEST PREPARATION
1. Load vehicle tank with material.
2. Position a suitable container to catch all the material dispensed
through the liquid pump. The container must be large enough to obtain
a good, representative sample. The larger the sample weighed, the
higher degree of accuracy. When calibrating a pre-wet liquid material,
the pre-wet bar can be removed from its mounting and placed inside
the catch container. Alternatively, especially for flow meter and anti-ice
liquid materials, temporarily disconnect an appropriate hose and place
inside the catch container.
3. System is ready for calibration drop test.
NOTE: Calibration Data Sheets are
available in back of this manual
to record constants.
A warning message indicates material will dispense when
procedure is started. Ensure all personnel are clear before
starting the next step.
PERFORMING A LIQUID DROP TEST
NOTE: Steps 1 and 2 are performed
when a granular drop test is
initiated from the F6 Calibration
screen.
1. At the System Calibration screen (F6), select the Liquid Drop Test and
follow the onscreen instructions.
2. At the Liquid Calibration screen, select and press the corresponding
number (1-4) of the appropriate material.
– For pressure-based anti-ice systems, a target pressure must be
entered. This should be the nozzle manufacturer’s rating pressure
typically 40 psi (2.75 bar).
– If running pressure, ensure booms are drained prior to running
Offset
Flex4 Pro
TM
Control System
6010541 Rev A
CALIBRATIONS / 109