McHale Fusion 2 electronic control system section
11- 14
McHale Fusion 2 round baler wrapper technical service manual
Issue 1: 0208
11.4: Sensor testing
Function
The chopping knives on, net cut,
bottom chamber door up rear tip roller
and motor speed sensor, are 12 mm
stainless steel reed sensors . These
sensors contain a glass reed switch in
series with a 100 Ohm resistor. The
switch closes when a magnet is
placed near it’s front face, 25 mm
approx.
For best range the magnets are
usually mounted with stainless steel
bolts – non magnetic.
Testing
Connect a multi-meter set on the
Ohms ‘Ω‘ range to the sensor.
The meter should show a very high
reading or open circuit, placing a
magnet close to the sensor should
reduce the resistance to
approximately 100 Ohms.
These sensors can be monitored
from within the Input/Output test
menu.
Reed sensors must be handled with
care, the glass reed switch inside is
easily damaged, do not subject to
mechanical shocks or over tighten.
11.4.1: Reed sensor testing
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