DOL 535 • DOL 539
Technical Manual
41
Read the voltage and check the value.
Feed demand sensor
:
• 0.0 V = not feed demand
• 10.0 V = feed demand
Repeat the test for
Cross auger sensor
. The values are the
same for the cross auger sensor.
5.2.1.3 Testing the drum weigher
Select the menu
Technical | Manual/auto.
Then select
Production | Feed weigher
.
Activate
Empty feed weigher
.
The drum makes one turn. This tests:
• Motor relay (
Emptying relay
)
• Inductive sensor (
Weigher position
)
If the drum makes one turn, deactivate the function again.
If the function
Empty feed weigher
does not make the drum
turn once, the function must be deactivated again else the
weigher will try again after 1 minute. Check the voltage on the
inductive sensor and try again.
If the weigher is not emptied within max. 20 seconds, the function
Empty feed weigher
must be deacti-
vated again, check the voltage on the inductive sensor.
If the drum turns
more
than once when activating the function
Empty feed weigher,
the voltage of the inductive
sensor (Drum position) should be checked.
The voltage should be as follows:
• Outside the metal plate (=no signal) < 1.8 V
• On the metal plate > 7 V
Check the inductive sensor and the resistance, if the voltage levels differ from the above.
5.2.1.4 Testing DOL 9940
Select the menu
Technical | Manual/auto.
Then select
Production | Feed weigher
Activate
Empty feed weigher
The house controller activates the solenoid coil and the doors of
the weighing container open to empty the weigher.
If the feed weigher does not empty the weigher, the solenoid
coil may be defective or the container does not contain min. 10
kg.
Check the contents of the weighing container.
If the weigher is empty, the house controller activates the sole-
noid coil once but the weigher will not empty its contents (as the
quantity of feed weighs less than 10 kg).
