Checking Sensor's Output Voltage Range - MacDon FFT FD75 Assembly Instructions Manual

Combine
CLAAS 500/600/700
Series
Check sensor's output voltage range at float indicator according to the instructions that follow.

Checking Sensor's Output Voltage Range

The auto header height sensor output must be within a specific range for feature to work properly. To check
sensor's output voltage range, follow these steps:
1. Position header 150 mm (6 in.) above ground, and rest it on safety props. Unlock adapter float.
NOTE:
If header is not on down stops during next two steps, voltage may go out of range during operation causing a
malfunction of auto header height control (AHHC) system.
2. The pointer (A) on float indicator should point at 0. If it
does not, adjust cable bracket (B) until pointer (A) on
float indicator points to 0.
3. Measure voltage between ground and signal wires at
AHHC sensor in float indicator with a voltmeter (A).
NOTE:
The voltage reading should be below 4.3 V.
214325
SETTING UP AUTO HEADER HEIGHT CONTROL
Lower Voltage Limit
(+/- 0.2)
0.7 V
Upper Voltage Limit
(+/- 0.2)
4.3 V
Figure 5.196: Float Indicator with Auto Header
Height Sensor
Figure 5.197: Float Indicator Reading 1 V
230
Minimum Range
Difference
2.5 V
Revision A