Hirschmann qSCALE i2 Service Manual

Troubleshooting
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qSCALE i2 Cranes (Tool Version 3.0.34) Service Manual / Issue B / 11-2017 / ac.
Verify that the sensor is being supplied with about 1.6V by measuring between Pin 3 (-) and Pin 1 (+) of
terminal X20. If the voltage is outside of a range of 1.4V to 1.8V, the converter board may be defective.
Unplug the length sensor and measure again. If the voltage is still out of the correct range, exchange
the converter board. If unplugging the length sensor made the voltage return into the acceptable range,
exchange the length sensor. If the voltage is correct, continue.
The length sensor returns a voltage between 0V at 0 turns of the length pot (= fully retracted) and 1.64V
at 10 turns. How many turns you get at full extension depends on the gear ratio, the boom length, the
length cable used, and the spooling pattern. The following table shows the expected output voltage
(measured between X20-3 and X20-2 Signal) for each complete turn of the length potentiometer. Note
that this does not synchronize to the number of turns of the cable reel.
Length Sensor Signal on Pin 3
Turns
Voltage X20-3 to
X20-2
0
0.00
1
0.16
2
0.33
3
0.49
4
0.66
5
0.82
6
0.98
7
1.15
8
1.31
9
1.47
10
1.64
Table 4 - 1
Note: Actual voltages will vary slightly.
Go back to your indication screen and compare length indicated and actual again. If the indicated length
varies significantly from your actual length (more than 0.3 feet), the length sensor is defective and
should be exchanged.

Hirschmann qSCALE i2 Specifications

General

Brand	Hirschmann
Model	qSCALE i2
Category	Control Unit
Language	English