Hirschmann PAT DS 85/0002 - Page 14

Service Manual DS 85
© Hirschmann Rev.G 10/05/15 190166_G.DOCXG
8
The angle sensor returns a voltage between 1.875V at 90 degrees and 3.125V at 0 degrees:
Angle Sensor Signal on
Pin 3
Angle
Voltage
90
1.875
75
2.083
60
2.292
45
2.500
30
2.708
15
2.917
0
3.125
Note: Actual voltages will vary slightly.
Measure this voltage between Pin 5 (GND) and Pin 3 of Terminal X21.
If you need to determine the angle for voltages other than the above, do so by using the following
formula:
Angle (degrees) = 90 degrees – ((Voltage-1.875) * 72)
If this angle matches your actual angle, but the indicated angle varies significantly (more than 0.4
degrees), the angle sensor is fine and the error is somewhere else. If this angle varies significantly
from your actual angle, the angle sensor is bad and needs to be exchanged. Otherwise, continue:
At this point, you have verified that the angle sensor is giving you the right output to match your actual
angle, but the system is displaying the wrong angle. If you can rule out software and operator error, it
is most likely that the converter board is defective and it needs to be exchanged.