micro-trak MT-3405F II, Reference Manual

Page: 48 / 62

48
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 NH3 application (please refer to En ter ing Flow me ter
Calibration Value, page 25).
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 the Run/Hold switch in HOLD, 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 on, RUN/HOLD switch to RUN) 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 Run/Hold switch in HOLD 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.
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
Appendix E
(cont)
Fine Tuning Flow Calibration Val ue - NH3
Systems
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).