TeeJet 844-E Sprayer Control - Manual (Page 20)

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844-E Sprayer Control
User program tip
User Programmable Tip
Default = 0.00
While in the User Programmable Tip step, the tip indicator arrow
will be flashing above the
P
tab at the bottom of the display.
In some cases you may find that nozzles other than those pre-
programmed for the 844 Sprayer Control will need to be used. If
one of the eleven pre-programmed tips do not meet your needs, this
programming step allows the user to manually program a tip.
Use the Plus key or Minus key to adjust flow rate in US
Gallons Per Minute (Liters Per Minute) {Imperial Gallons Per Minute}
at 40 psi (2 bar). Pressing the Plus key and Minus key
simultaneously will clear the value to zero. To accept the value, press
the Program key to advance to the next programming step.
The flow rate information for the tip is only used to calculate the
pressure reading for flow based controls. With non-linear tips, the
calculation would be incorrect. Therefore we recommend a “0.00”
setting for non-linear tips so that the pressure will read “0” at all times,
instead of an inaccurate pressure. Non linear tips should not be used
with pressure based controls. Pressure based controls use the tip flow
rate information to adjust the pressure to achieve the right application
rate based on the size of the tips. With non linear tips, there is no way
for the controller to accurately calculate what the pressure should be at
various speeds.
WARNINg: If the user is using tips other than the TeeJet®‚ VisiFlo®
brand, the corresponding colors may not match. In this
case, the user should determine the flow rate of the tip
being used at 40 psi (2 bar), and enter this flow rate as the
programmable tip.
NOTE: The flow rate will be automatically displayed at 40 psi (2 bar).
This pressure must be used for determining your tip’s flow rate.
Actual operation pressure is not important.
When the correct nozzle flow rate has been entered, advance to the
next programming step by pressing the Program key .
pressure regulation
Pressure Regulation Mode
Default = byp (By-pass for US, trF, I
N
P
, and Si Modes)
Default = thr (Throttling for nh3 Mode)
While in the Pressure Regulating Mode step, the regulator symbol
will be flashing at the top of the console display.
This step tells the 844 where the regulating valve has been plumbed.
Once set correctly, this value should not change unless the regulating
valve is physically moved to a new point in the plumbing. For more
information on plumbing refer to pages 2 and 3 of this manual.
The default value “bYP” indicates that the pressure regulating valve
is plumbed in the bypass line. In most situations, especially total flows
below 4 US GPM (15 l/min) {3.3 Imperial GPM}, this is the preferred
installation position. If the default is correct, press the Program key
to accept the value and advance to the next step.
NOTE: When programmed in the bypass mode, with the controller in
“MAN” mode, the pressure regulating valve should close when
the Plus key is pressed, and open when the Minus key
is pressed.
The pressure regulating valve can be located in the supply line
between the flow meter and the boom control valves. If you will be
locating the pressure regulating valve in this position, use the Plus key
or Minus key to change the value to tHr (Throttling Mode).
By doing this, you have reversed the polarity that the console uses to
control the regulating valve.
NOTE: When programmed in the throttling mode with the controller
in “MAN” mode, the valve should open when the Plus key
is pressed and close when the Minus key is pressed.
Press the Program key to advance to the next step.