TeeJet 854 Operating Manual_98-05051 R1

854 Sprayer ControlPRESSURE TRANSDUCER LOW PRESSURE CALIBRATION (P REF)This step is used to calibrate the “0”pressure setting of the pressuretransducer installed in your system. Thepressure transducer used with the 854 isa current type transducer and uses a 4-20 mA reading. 4.0 mA represents 0pressure.PSI0R e f4.00M aPTeeJet VisiFlo color coding only: For other tips see manualAutomatic Calibration" Make sure that the sprayer pump isturned off and that there is absolutelyno pressure in the system (releasepressure held by boom control valvesand nozzle body check valves)." In some cases it may be best toremove the sensor from the plumbingsystem to complete the calibration." Press and hold the + and keyssimultaneously for 3 seconds toactivate the auto-calibration feature." The lower left portion of the displaycounts 1-10 during the calibration." When the display finishes counting, itshould display a number close to 4.0(+/- 0.2)." The low pressure value of thetransducer is now calibrated." Press thePRO key to advance to thenext step.PSI04.0 01-1 0 8 8PTeeJet VisiFlo color coding only: For other tips see manualPSI0R e f4.1 3M aTeeJet VisiFlo color coding only: For other tips see manualP27 98-05051R1