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VIII. TROUBLESHOOTING
When troubleshooting the Yo-Yo Inventory Management System, confirm that all power and communications
wiring between the sensor and the remote display or PC are correct. If troubleshooting the sensor outdoors,
shield the opto-reader from direct sunlight whenever the cover is removed. Always check the display status
message on the remote display.
PRObLEM
The reading always indicates a
full vessel when a measurement
is requested.
The remote display is blank.
The sensor cycles normatlly, but
the displayed value reads "0"
or "1".
A reading was requested once,
but the sensor travels down to
the surface multiple times.
Up/Down Do not match.
The sensor does not respond
when a measurement is
requested.
SOLUTION
The sensor is short cycling. Inspect the sensor for the following possible problems: verify
the sensor weight is 20 to 25 ounces, check that the weight is not stuck in the home
position (possibly due to material build-up), check that the count wheel is free to move
through the opto-reader, and check that the motor heater is operational (if the ambient
temperature is below 32° F (0° C).
Power to the display is fed from the sensor(s). First check that power is supplied to the
sensor(s). Next, check the fuse on the display driver board (1A). If this is a single sensor
system and power is present at the sensor, also check the sensor fuse (5A).
The sensor may be set to engineering units in the Units menu, but the Full Scale Value
has not been changed from its default value of 1. Set the Full Scale Value to a valid
number.
If the sensor is programmed to take automatic readings, the sensor may be taking a
timed reading following the manual request. If the number of counts up and down does
not agree, the sensor automatically takes another reading. The sensor will send the
weight to the material surface three times before displaying
Check that the count wheel is moving freely and that the cable is not slipping. Check
that the Maximum Move Distance is not greater than the length of cable available on the
sensor. The cable should be running off of the storage wheel and rewinding backwards.
Check to make sure that the sensor is properly addressed. Check the display. The status
should read "Starting Measure" followed by "Sensor is Measuring". If the status does
not change, check the sensor fuse. If a different status message appears, see chart
below. Jumper pins on Measure Terminal to test the cycle in the board.
If all electrical functions are performing properly, check to see if the nut for the spring of
the cable wrap needs to be loosened.
20
www.bindicator.com
LBY180112 Rev. B
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