2.3 Input Signal Processing
2.3.1 Analog Inputs
All sensor characteristics can be defined with the WINgauge Software.
2.3.1.1Grounding Concept
The Master gauge has two main ground lines. Ground term.31 is connected to the vehicle's body (negative battery terminal)
and Sensor Ground is supplied from the instrument; insulated return sender are necessary. The Sensor Ground should not be
connected to vehicle ground, which would result in a higher current flowing through this line and thus produce a signal noise
and measurement error. Sensor Ground and Ground term.31 are joined together inside the Master Gauge. This grounding
principle is necessary to accurately measure analog values. Ground shift on Sensor Ground is minimized by this concept.
2.3.1.2Sensors
The static and dynamic voltage drop of the sensors should not exceed 0.5 V.
Pressure: 10 - 184 Ohms
Temperature: 10 - 700 Ohms
Fuel lever type: 3 - 180 Ohms
Fuel dip-pipe: 0.5 - 90 Ohms
Other sensors: 4 - 20 mA
Other sensors: 0 - 5 V
2.3.2 Input Signal Processing applied to the two frequency inputs
Frequency 1:
The standard modules can be changed to 500 < k < 400 000 pulses/km or miles for the Speedometer
and 0.5 - 400 pulses/rev for the Tachometer.
Maximum frequency is 40 kHz (2 kHz via internal divider).
Frequency 2 as Hall Sensor / Terminal W:
500 < k < 65000 pulses/km or miles for Speedometer and 0.5 - 65 pulses/rev for Tachometer.
Maximum frequency is 2 kHz.
2. Functional Specification
Product Manual
Technische Änderungen vorbehalten Technical details subject to change
2 - 7
TU00-0726-0000002
0609
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