TeeJet 844-AB Sprayer Control - Manual (Page 10)

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844-AB
Press the Programme key. The console will ask for the volume
that was sprayed. Use the Plus or Minus keys to adjust the
value to match the volume sprayed in litres.
Figure 22: Calibration procedure
uOL 378
1 2 3 4 5 6 7 8 9 10 11 12
Press the Programme key to return to the Setup mode. The
new flow meter calibration number will be displayed. To accept the
value displayed, press the Programme key again. To repeat the
calibration procedure, repeat the previous steps.
Figure 23: Calibration procedure
615
1 2 3 4 5 6 7 8 9 10 11 12
Pressure transducer low pressure
calibration (P Ref)
The Pressure transducer low pressure calibration step is used to
calibrate the “0” pressure setting of the pressure transducer. The
pressure transducer used with the 844-AB uses a 4-20 mA reading
(4.0 mA represents 0 pressure).
Figure 24: Pressure transducer low pressure calibration
P
REF
4.0
1 2 3 4 5 6 7 8 9 10 11 12
Manual entry
Use the Plus or Minus keys to modify the value.
Automatic calibration
Make sure the sprayer pump is turned “Off” and there is no pressure
in the system. Press and release the Plus and Minus keys
simultaneously to activate the auto-calibration feature. The message
“MES” will be displayed. A count of “0” to “9” will appear on the lower
right portion of the screen.
Figure 25: Pressure transducer low pressure calibration
160
MES
3.9
9
1 2 3 4 5 6 7 8 9 10 11 12
Once the display finishes counting, a number close to 4.0 (+/- 0.2)
should be displayed. The low pressure value of the transducer is
calibrated. Press the Programme key to advance to the next step.
Figure 26: Pressure transducer low pressure calibration
P
REF
3.9
1 2 3 4 5 6 7 8 9 10 11 12
NOTE: If a pressure transducer is not installed on the system, skip
this step by pressing the Programme key. Leave the
default value at “4.0”.
Pressure transducer maximum rating
(P HI)
The Pressure transducer maximum rating establishes the maximum
rating of the pressure transducer. This number can be found stamped
on the pressure transducer. If the transducer has a maximum rating
of 10 bar and the number is shown on the display, advance to the
next step by pressing the Programme key.
If the maximum rating is 25 bar, use the Plus or Minus keys to
change the value. Press the Programme key to advance to the
next step.
Figure 27: Pressure transducer maximum rating
P
Hi
3.5
1 2 3 4 5 6 7 8 9 10 11 12
Bar
NOTE: If a pressure transducer is not installed on the system, skip
this step by pressing the Programme key. Leave the
default value at “10 Bar”.