Smithco Spray Star 1607P (1999) Operator Manual - Manual (Page 23)

21
Operation
PROGRAMMING THE 844 SPRAYER CONTROL SYSTEM
(
CONTINUED
)
RADAR SPEED PULSES
Automatic Calibration:
The automatic calibration of a Radar speed sensor is similar to the automatic calibration of a wheel speed
sensor. Refer to the directions above. When the console has determined that a Radar Speed Sensor is being
used, "RAD "will be displayed in the lower left of the console display.
Manual Calibration:
To manually enter the radar calibration value, first press the Auto/Man key to put the control console into radar
mode. When the Control Console is in the manual radar calibration mode, "RAD "will be displayed in the lower
left of the console display. Now use the or keys to adjust the value. When the correct value has been
entered, press the key to validate this value.
LIQUID SPECIFIC GRAVITY (DENSITY)
Default = 1.00
1. While in the Liquid Specific Gravity (Density) Programming
Step, the
D
symbol, will be flashing at the top of the console
display.
2. The default value of “1.00” corresponds with the specific
gravity of water and is correct for most pesticide applications.
Occasionally some spray solutions, such as fertilizer, have
different densities. If you are using such a material, a new
value should replace the default value. The chart to the left
can help you determine the specific gravity of other solutions.
3. To change the default value to your new value, use the
or keys to change the value in the display. Depressing
the and keys simultaneously will clear the value to
zero. To accept the value and advance to the next programming step, depress the key.
4. If the solution that you are using can not be found on the chart specific gravity can be calculated as
follows:
Specific Gravity =
Weight of solution (lbs. per gallon)
8.34 lbs. per gallon of water
5. When you have completed the programming of the Liquid Specific Gravity or Density, you have com-
pleted the System Setup Mode of the TeeJet 844 Sprayer Control.
6. Now, press and hold the key for three seconds, and the entire program system will be stored in the
computer's memory.
For your protection, the 844 console will not automatically power down while in the
System Setup Mode. You must exit properly as described above to enable the console
auto power down feature. Cutting the power to the controller while in the System Setup
Mode will not save any changes made into the computer’s memory.
Weight of
Solution Per Gallon
Liquid
Density
7.0 lbs. 0.84
8.0 lbs. 0.96
8.34 lbs. - Water 1.00
10.0 lbs. 1.20
10.65 lbs. - 28% N 1.28
10.85 lbs. - 30% N 1.30
11.0 lbs. 1.32
12.0 lbs. 1.44
14.0 lbs. 1.68