TeeJet 844-E Sprayer Control - Manual (Page 19)

15
98-70006-ENUS R4
844-E Sprayer Control
pressure transducer
Maximum rating (P Hi)
Default = 150 (PSI in US, trF and I
N
P
Modes)
Default = 10.0 (bar in Si Mode)
This step is used to set the maximum rating of the pressure
transducer in your system. This number can be found stamped on the
pressure transducer itself. If your transducer has a maximum rating of
145 psi (10 bar in SI mode) and that number is shown in the display,
then advance to the next step by pressing the Program key . If,
however, the maximum rating is 363 psi (25 bar in SI mode), use
the Plus key and Minus key to change the value. Press the
Program key to advance to the next step.
NOTE: If you are not using a pressure transducer but are using a flow
meter instead, skip this step by pressing , leaving the default
value programmed.
Low Pressure Calibration (P rEF)
Default = 4.0
This step is used to calibrate the “0” pressure setting of the pressure
transducer installed in your system. The pressure transducer used with
the 844 is a current type transducer and uses a 4-20 mA reading. 4.0
mA represents 0 pressure.
This step uses an auto-calibration feature to calibrate the transducer.
Make sure that the sprayer pump is off and there is absolutely no
pressure in the system. Press and release the Plus key and Minus
key simultaneously to activate the auto calibration feature. You
will see the message “NES” in the lower left of the display and the
lower right of the display count the numbers “0” through “9”. When the
display finishes counting, a number close to 4.0 should be displayed.
The low pressure value of the transducer is now calibrated.
Press the Program key to advance to the next step.
NOTE: If you have selected a “FLO” based system, skip this step
by pressing the Program key and leave this value at the
default of 4.0.
nozzle Spacing
Default = 20 (inches in US, trF, and INP Modes)
Default = 50 (centimeters in Si Mode)
Default = 30 (inches in nh3 Mode)
While in the Nozzle Spacing step, the nozzle spacing symbol
will
be flashing at the top of the console display. Nozzle spacing should be
recorded in inches (cm in SI mode).
If the default value is correct, press the Program key to accept
the value. If the nozzle spacing is different than that shown as a
default, then add or reduce this number by using the Plus key
or Minus key keys to record the new value. Pressing the Plus
key and Minus key simultaneously will clear the value to
zero.
When the correct value has been entered, press the
Program key to accept the value and advance to the next step.
When broadcast or broad acre spraying, enter the nozzle spacing in
the display.
If banding, enter the band width as your spacing. If directed spraying,
enter the row spacing divided by the number of nozzles per row as your
spacing.
NOTE: All Application rate readings (US gPA, g/1000 ft
2 , #N/acre,
Imp. gPA, and l/ha) and area readings are expressed in treated
acres (hectares).
tips per boom Section
Number of Spray Tips Per Boom Section
Default = 6 (tips per section in US, trF, I
N
P
and Si modes)
Default = 12 (tips per section 1, 0 for the others in nh3 mode)
While in the Tips Per Boom Section step, the #tips symbol will be
flashing at the top of the console display. The console will also display
“SEC 1” at the left and a number (6) at the right of the display. The
“SEC 1” refers to boom section #1 on your console. The number at
the right is to be adjusted to match the number of tips you have on
boom switch 1.
The default value of “6” will appear for all booms sections. The next
five programming steps are Number of Spray Tips Per Boom Section
steps. These steps correspond with the five boom switches on the
lower portion of the console. The section you are programming can be
identified by looking at the SEC # at the left of the display.
You must program the correct number of spray tips for each boom
section on your sprayer. Use the Plus key or Minus key to
produce the correct value. Pressing the Plus key and Minus key
simultaneously will clear the value to zero.
Advance to the next step by pressing the Program key . This must
be done for all Number of Spray Tips Per Boom Section steps.
Any individual boom switches not being used must be programmed to a
“0” value. When you have programmed and validated the last Number
of Spray Tips Per Boom Section step, advance to the next program
step by pressing the Program key .