Dickey-John Control Point, Руководство оператора

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OPERATOR’S MANUAL
Control Point
®
11001-1489-201702 Rev B
SYSTEM CALIBRATION / 81
7. When a sufficient amount of material has been dispensed, press “S” to
stop the system. A screen appears showing the previous SPR CON
and the sensor COUNTS accumulated during the current run. The
screen asks for an entry of pounds before proceeding. Perform the
next step while the screen waits for the results.
8. If using a vehicle scale, reweigh the truck and calculate the amount of
material dispensed in pounds.
9. Enter that number into the console and press ENTER. Press “D” when
finished. The spreader constant (SPR CON) is now stored and
displayed on the SALT CALIBRATION screen and on the GRANULAR
CONFIGURATION screen for this material.
10. For maximum accuracy, repeat the entire procedure at least three
times. Temporarily write down the resulting SPR CON each time.
Average the results and keyboard enter the average as the final SPR
CON. Then record the SPR CON for this material on the
CALIBRATION DATA RECORDS sheets at the rear of this manual.
11. Repeat this procedure for each granular material used.
GRANULAR CALIBRATION FINE TUNING
If small but consistent application rate errors are observed over a period of
time, the spreader constant can be modified to fine-tune application
accuracy. See Appendix A for steps required to calculate the new spreader
constant, which is then keyboard entered on the (F3) GRANULAR
CONFIGURATION screen. Alternatively, the GRANULAR CALIBRATION
routine can be repeated to correct this type of APR error.
LIQUID MATERIALS CALIBRATION (F6)
The LIQUID CALIBRATION determines a flowmeter constant (K-FACTOR)
for each liquid material used. The K-FACTOR represents the number of
pulses generated by the flowmeter per gallon of liquid dispensed. The
NZLE CNST 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 CALIBRATION routine (also referred to as a liquid "catch test")
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 operator stops the system, weighs the discharged liquid,
and keyboard enters the amount. The system then calculates, stores, and
displays the K-FACTOR (NZLE CNST).
The procedural steps are as follows:
1. Load vehicle tank with the 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 may be removed from its mounting and placed inside
the catch container. Alternatively, especially for flowmeter based
anti-ice liquid materials, temporarily disconnect an appropriate hose
and place inside the catch container.