micro-trak 14869, Reference Manual

Page: 53 / 62

53
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)
TANK
CAL
AUTO
MAN
RESET
MANAUTO
CALHOLD
_____
_____
HOLD
1
S
pray
M
ate II
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 NH3
application
(please refer to En ter ing Flow me ter Calibration
Value, page 23).
PROCEDURE:
1. Start with a full nurse tank. Make certain that you have
an accurate scaled weight of the full tank. You will want
to apply a minimum of 1,000 pounds of NH3 for this
procedure. The larger the volume of NH3 used, the more
accurate the calibration will be.
2. With Boom 1 switch turned OFF, turn the rotary selector
to the VOLUME (1) (2) (3) position. Select which pair
of VOLUME/AREA counters (1, 2, or 3) that you want
to use by using the “+” button ONLY to select the pair
of counters as identified by the small number in the
lower right area of the left-hand display. If you attempt
to use the “-” button, it will clear the selected counter
pair
(CLEAr will be displayed before the counters
are cleared). After you have selected the counter pair
number, press and hold the RESET button until the
display reads 0.0.
3. Proceed to the field and perform actual application (turn
Boom 1 switch to ON) until at least 1,000 pounds of NH3
has been applied. (One nurse tank is preferred). The
larger the volume of NH3 applied, the more accurate the
calibration will be. Obtain an accurate scaled weight of
the partially used nurse tank. The difference between the
starting and ending weight is your calibration weight.
4. Put Boom 1 switch in the OFF position. Compare the
console’s VOLUME reading with the known amount
of NH3 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.
5. 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.
6. Momentarily press the CAL button. The CAL icon will
begin to flash and the total volume will be displayed.
See Illustration to the right.
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)
TANK
CAL
AUTO
MAN
RESET
_____
_____
CAL HOLD
1
S
pray
M
ate II
7. When the TOTAL FLOW value is displayed, use the “+” or
“-” button to adjust the value to match the amount of
NH3 run.
8. 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.
9. Exit calibration by holding the “CAL” button until the red
warning light goes out (about one second).
Appendix F
(cont.)
SprayMate
TM
II NH3 Specific
Fine Tuning Flowmeter Calibration Value for NH3