TeeJet 844 Sprayer Control - Manual (Page 20)

If, however, you have installed a pressure transducer instead, use the or
key to select “
PrS ” for a pressure based system. Then, depress the key to
advance to the next step.
If both sensors have been installed on the sprayer, this step will determine which
sensor will be used by the 844 to determine pressure/flow regulation. If “
FLO ” is
selected, the flow meter will be used to control the flow and the pressure
transducer will be used only to display the actual pressure. If “
PrS ” is selected,
the pressure transducer will be used to control the flow and display the actual
pressure. The flow meter signals will be ignored.
Flow meter Pulses
Default = 650
During the Flow meter Calibration Step, the symbol (flow meter turbine) will
be flashing at the top of the console display.
First, locate the factory calibrated flow meter pulse rate tag on the flow meter. If
this varies from the default value of the console, use the or keys to
modify the value. Depressing the and keys simultaneously will clear the
value to zero.
In some cases, larger flow meters with small calibration numbers will include
decimals for greater accuracy. To add a decimal to the 844 calibration number,
press the Auto/Man key.
If you are not using a flow meter but are using a pressure transducer instead
and have selected “
PrS ” in the previous step, this step will not appear.
NOTE: This flow meter number represents the number of pulses per liter of
liquid. The 844 console makes all of the necessary conversions if using
units other than metric.
Pressure Transducer Maximum Rating (P Hi)
Default = 150 (psi in US , trF and INP 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 150 psi (10 bar in SI mode) and that
number is shown in the display, then advance to the next step by depressing the
key. If, however, the maximum rating is 300 psi (20 bar in SI mode), use the
and keys to change the value. Depress the 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.
18
FLOW METER
CALIBRATION
150
P Hi