Flow Meter Sensor - Toro Multi Pro 5800 Service Manual

Flow Meter Sensor

The flow meter measures the spray system flow as it
moves through the flow meter. The sensor is an input to
the Toro Electronic Controller (TEC). Accurate informa-
tion from the flow meter is necessary to calculate appli-
cation rate. The flow meter is located in the center of the
spray manifold (Fig. 127). The sensor uses a magneti-
cally based, Hall Effect integrated circuit. As the rotor in
the flow meter turns, the sensor accurately senses the
rotor movement. The relationship of the sensor to the ro-
tor is critical as the sensor is designed to read movement
in one direction and must be perpendicular to the rotor.
The sensor connector pin 2 is the positive lead, the con-
nector pin 1 is the ground lead and the connector pin 3
is the signal output. For flow meter service information,
see the Spray System chapters in this manual.
NOTE: If the flow meter sensor or body is being tested,
serviced or replaced, calibrate the flow meter after in-
stallation (see Calibrating the Sprayer Flow in the ma-
chine Operator's Manual).
Testing
1. Park machine on a level surface, stop engine and en-
gage parking brake.
2. Disconnect machine wire harness from flow meter
sensor.
3. Test the machine wire harness to the flow meter sen-
sor:
A. Set the ignition switch to the RUN/PREHEAT po-
sition.
B. Set the spray−mode switch located on the instru-
ment panel to the MANUAL position.
C. Set the spray pump, master boom and Spray
Boom switches located on the control console to the
ON position.
D. Access the InfoCenter Display Total Area or Sub−
Area Screens (see Spray System Chapters in this
manual).
E. Connect a jumper wire across the ground (−) pin 1
and the signal (+) pin 3 (Fig. 128A). Watch the Info-
Center Display as you open and close the connec-
tion across the pins multiple times, the total volume
sprayed reading should increase.
F. Remove the jumper wire.
G. Use a multimeter set to DC voltage and check for
12 VDC across the supply (+) pin 2 and ground (−)
pin 1 of the machine wire harness (Fig. 128B).
H. Turn the ignition switch to OFF.
Multi Pro 5800
1. Spray manifold
1
A
1
B
1. Machine wire harness
connector
4. Test flow meter sensor:
A sensor test harness is required to quickly check sen-
sor operation without removing the sensor from the flow
meter.
NOTE: Instructions for fabricating and using a flow me-
ter sensor test harness can be found in the Special Tools
section of this chapter.
Page 6 − 85
2
1
Figure 127
2. Flow meter
1
2
2
3
12 VDC
3
1
2
3
Figure 128
2. Jumper wire
3. Multimeter probe (typ.)
Electrical System