4000 Evaluation Unit
Service Manual 4-9
Supported reference sensors:
− inductive sensors (TDC sensors) with various timings
(incl. Motronic flywheel)
− optical sensors
− digital pulses from engine management system
− strobe with engine marks
Measurement range: 0…59.9° CA (strobe mode)
-9.9…99.9° CA (other reference sensor)
Resolution: 0.1° CA
Accuracy: 1.0° CA (strobe mode)
0.5° CA (other reference sensor)
• Measurement of dwell angle in petrol engines
Interrupter signal (ignition primary) (AVL DiGas 4000 and AVL DiCom 4000)
Measurement range: 0.0…99.9%
Resolution: 0.1%
Accuracy: 1.0%
• Oil temperature measurement
The temperature is measured by inserting the AVL oil temperature sensor, available
in various lengths, into the sump (or more rarely, into the cooling water).
Measurement range: 0…120° C
Resolution: 1 °C
Accuracy: ± 4° C
• Lambda probe voltage and voltage of vehicle electric system:
A voltage can be measured (lambda probe voltage or the voltage of the vehicle
electric system).
Measurement range: 0.00...32.00 V DC
Resolution: 40 mV
Accuracy: 160 mV
Graphical representation (lambda probe voltage only)
Amplitude: 0…1.8 (5.0) V -40 (120) mV resolution
Representation time: 10 (20) sec -20 (40) msec resolution
Frequency evaluation: 0.1…10 Hz -0.01 Hz resolution, ±0.02 Hz
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