10. Display Unit Calibration and Setup
PNEG-2340
Feed-Link 2
41
Troubleshooting Display Unit
General
LC Error n
The display unit will evaluate the signals from each load cell, for each load cell the user has enabled
via the Configuration Menus. If a bad load cell is detected, the normal display will flash the weight
calculated using the good load cells and display an error message indicating the bad load cells.
For example, “LC Error 5” indicates the load cell connected to the load cell input #5 (on the base)
is not functioning properly.
Re-Perform: Empty
If the display unit has an empty bin calibration (empty bin weight), but the empty bin weight is too small,
then this message will be displayed. The user should either perform an empty bin calibration or manually
update the empty bin weight.
Weight Too Large
This message will be displayed when the user is manually entering the weight of an empty bin (in the
Configuration Menus), but the weight is too large compared to the capacity of the load cells.
Display is Blank
Possible cause is load cell red and black wires have been switched, shorting out power and ground.
Verify wiring. The voltage between the red and black wires on a load cell should be 5 VDC.
Load Cell Errors
Possible cause is a miswired load cell.
Remedy-measure voltages between red (power) and black (ground) on the load cell and verify the
5 VDC. Next measure the voltage between signal (white) and ground (black) this voltage should be
between 2.5 VDC and 5 VDC. All three (3) wires must be hooked up properly to receive the signal wire
voltage reading. If the signal voltage reading is around zero, this probably means the signal wire has not
been wired properly. (See wiring diagrams on
Testing Feed-Link Load Cells with a Volt/Ohm Meter
With the Meter on Ohms and dial on 2K setting
With black meter probe on black load cell wire and red meter probe on red load cell wire the meter should
display around 350 to 360 Ohms.
If low reading 1-100 Ohms or really high reading =
BAD CELL
.
With the Meter on Ohms and dial on 20K setting
With the black meter probe on black load cell wire and the red meter probe on the white load cell wire
the meter should have no reading =
GOOD CELL
. It would be same reading as if the probes were
touching nothing. If you get a reading =
BAD CELL
.
NOW
: With the black meter probe on white load cell wire and the red meter probe on the black load cell
wire the meter should display around 2K Ohms or greater. If no reading or very low reading =
BAD CELL
.
