TECHNICAL INSTRUCTIONS
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Visum Monitor
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J.Assy Agricultural
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TECHNICAL INSTRUCTIONS
7
6
Tweaking your system
Sensor’s parameters
The default parameter from the system are: 0
SENSITIVITY = 400
TIME = 9
If the system is accusing a “no flow” when there is a flow
going through the sensor you can change the sensitivity
of the system to a lower value. If in this case you increase
the sensitivity you are actually generating more problem
to your system.
If you want an alarm as soon as the flow goes down you
can increase the sensitivity value, in that case a less
intense flow will generate an alarm from the sensor.
The time can be change when a faster alarm is needed,
so if the goal is having a faster alarm you can set a lower
value in the sensor.
In order to avoid any kind of false alarms, the TIME should
be increased and the SENSITIVITY should be decreased.
If the SENSITIVITY is set too low it is possible that the
residual flow (the flow when the meters are turned off but
the air flow is on) stays above this level, so the sensors
will take longer to send the “no flow” signal when the
meter stops.
Monitor’s parameter
The default parameter from the system are:
MANEUVER DELAY
: 5
NUMBER OF SENSORS TO ENTER IN A MANEUVER
STATE
: 8 sending no flow (when more than 12 rows are
communicating and listed in the monitor – check using
function
F1
)
PERCENT OF SENSORS TO ENTER IN A MANEUVER
STATE
: 75% sending no flow (when less than 12 rows
are communicating and listed in the monitor – check
using function
F1
)
PERCENT OF SENSORS TO EXIT A MANEUVER STATE:
50% sending flow
The first information to be clear is that the system works
using just one logic to enter in a maneuver state. The
monitor does not use both parameter (number of sensor
to enter in a maneuver state OR percent of sensors to
enter in a maneuver state). Which one is used depends
on how many sensors are present to the monitor.
ATTENTION:
• Any change in these parameters, even when
small, can generate or increase the false alarm if
done wrong. Be sure that the concept for each
parameter is clear before changing any of this
configuration.
TIP:
• The system works for many fertilizer prescription,
but the most testing to define the parameters was
done using a 140 lbs./ha @5mph ( 3,5 in between
rows) . If your system is operating at these values
or higher check other possibilities before changing
the sensor parameters.
• If the system is working with a small or low
prescription rate range you may need to change
the sensitivity parameter.
• If only one sensor or a small number of sensors
are presenting problems check if there is any
obstruction in the tubes or meters before changing
the parameters.
