Komatsu 830E-AC Shop Manual page 834

COMPONENT DESCRIPTION
System Diagram
Suspension Pressure Sensors
PLMIII uses a two-wire pressure sensor. The range
for the pressure sensor is 4000 psi (281 kg/cm
the overload limit is 10,000 psi (700 kg/cm
wire to the sensor is the supply voltage and the other
is the signal. The 0-4000 psi range is converted into
an electrical current between 4-20 ma. The supply
voltage for the sensor is nominally +18vdc. Each
pressure sensor has an 118 in. (3000 mm) length of
cable. The cable is specially shielded and reinforced
to provide mechanical strength and electronic noise
immunity.
Inclinometer
The inclinometer is used to increase the accuracy of
load calculations on an incline. The inclinometer
uses three wires. For the sensor, red is the +18vdc
supply voltage, black is ground and the white is the
signal. The incline signal is a voltage between 1 and
4 volts. Zero degrees of incline is represented by
2.6vdc on the signal line. The voltage signal will be
decreased by 0.103vdc for every degree of nose up
incline.
M20-6
Operator Display
The speedometer/display gauge is used as a speed-
2 ometer and payload display. The top display is used
) and
for speed and can display metric (km/h) or English
2
). One
(mph) units. Grounding terminal #4 on the back of
the speedometer will switch the meter to display met-
ric units. Leaving terminal #4 unconnected will cause
the gauge to display English units. The speedometer
can be adjusted using a calibration potentiometer in
the back just like existing speedometers.
The payload meter uses the lower display for pay-
load information. The normal display mode shows
the current payload. The display can be changed to
show the load and total tons counter or the Operator
ID. Using the operator switch on the dash panel, the
current suspension pressures and incline can be dis-
played. The units for display are set using the PC
software. Payloads can be displayed in short tons,
long tons or metric tons.
Payload Meter III 02/05 M20008