micro-trak MT-3405F II, Справочное руководство

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38
WIDTH
CAL
FLOW
CAL
MIN
FLOW
ADJUST
RATE
TARGET
RATE
SPEED
CAL
INLINE
BYPASS
TEST
SPEED
VOLUME /
MINUTE
DISTANCE
AREA /
HOUR
VOLUME
(1) (2) (3)
RATE SPEED
AREA
(1) (2) (3)
ON
OFF
1 2 3 4 5
B O O M S
RUN
HOLD
CAL
AUTO
MAN
RESET
ON / OFF
____
APPLICATION RATE
TANK
___
CAL HOLD
V 1 2 3 4 5
This procedure is used to verify and fine-tune the flowmeter
calibration. Every flowmeter is calibrated with water at the
factory and stamped with a calibration val ue. Enter that
value as a starting point and use this pro ce dure to fine-
tune that value for your specific in stal la tion and spray ing
application. This procedure should be re peat ed each time a
new solution is being applied (differ ing so lu tions will have a
different spe cif ic gravities and different flow char ac ter is tics)
or when the flowmeter in stal la tion has been altered.
PROCEDURE
1. Put enough water in the sprayer tank to perform this
test. (Preferably 100 gallons or more. The larg er the
volume of water used, the more accurate will be the
calibration.)
2. Start sprayer pump and turn on booms. Run enough
water to purge all air from lines. Turn off booms but
leave pump running.
3. Turn console rotary selector to the VOLUME po si tion.
Select the counter (1-3) that you want to use. Press and
hold the RESET button until the dis play reads 0 (about 2
seconds).
4. Turn on all booms, turn Run/Hold switch to RUN, and
run a known amount of water (preferably 100 gallons or
more).
*
5. Put Run/Hold switch in HOLD position. Compare the
console’s VOLUME reading with the known amount of
water run. If the two amounts are within one or two
per cent, no fine tuning is required. If the two amounts
are more than two or three percent dif fer ent, con tin ue
with the next step.
6. With the console still in the VOLUME position, enter
calibration, hold the CAL button until red warning light
comes on; about one second). The dis play will show the
flowmeter calibration value and the CAL icon.
7. Momentarily press the CAL button. The CAL icon will
begin to flash and the total volume will be displayed.
See Illustration to the right.
8. When the TOTAL FLOW value is displayed, use the “+”
or
“-” button to adjust the value to match the amount of
water run.
9. Momentarily press the CAL button. The CAL icon and
the flowmeter calibration number will be displayed.
You will notice that the flowmeter calibration value has
changed. Write down the new flowmeter calibration
value. This is your “fine tuned” calibration value, keep it
for future reference.
10. Exit calibration by holding the “CAL” button until the
red warning light goes out (about one second).
*
The most accurate method to measure the volume
of water run is to place a container under EVERY
nozzle and add together the amount from each
nozzle. This assures that 100 percent of the water is
collected and that all nozzles are spraying equally.
It is important to perform this pro ce dure at a flow
rate similar to that which will be used in the field.
It is also possible to disconnect the main boom line
and run it to a large measuring container but a valve
must be installed and properly adjusted to simulate
actual field conditions.
Appendix C - Fine Tuning Flowmeter Calibration Value
(If system is set up for NH3 application, see page 57)