MAGUIRE FLEXBUS Lite, Installation Operation & Maintenance

Page: 32 / 143

32
Load Cell Zero Calibration
If your load cells already display a weight close to zero, plus or minus 10 grams, you may skip this
section. Weight readings tare at the beginning of each cycle. The acceptable plus/minus weight
reading range is model specific and is set in the TH (Tare High) and TL (Tare Low). Above TH or
below TL will display a Tare High/Low error and the blender will not run. If your blender's weight
reading is too far from zero (near TH or TL) you should recalibrate.
Before Recalibrating:

Verify the weigh bin is EMPTY.

Verify the load cell plug is plugged into the side of the controller.

Verify the weigh bin is resting on the load cells freely.

Verify the air line to the dump valve is connected as it would be during normal operation. A
disconnected air line adds weight.

Verify the load cells and bin are not jammed in any way. To test for this see that a light
touch on Verify the bin causes the display to change. When the pressure is removed the
display must return to exactly where it was, plus or minus 1 gram. If this does not happen,
something is touching something and the bin is not entirely free to move. Check
EVERYTHING around the bin.
How to Zero Calibrate the Load Cells
Press Display will prompt for a password.
(default: 22222)
Then
press:
Press Blender Configuration Display will show menu options
Press Calibration Routines Display will show menu options
Press Calibrate Load Cells
Press ZERO Display will say: Confirm weigh bin is empty then
press:
YES (weigh bin can be dumped using
DUMP BIN button).
Followed by a gram weight of
0
Press
The Title Bar will display: MODE=WAITING
The ZERO point of the load cells is now set properly. FULL weight calibration may also be done
at this time; however, it probably is NOT NECESSARY. When load cell readings shift due to
rough handling, the entire range of readings from ZERO to FULL shift together. The ZERO weight
calibration routine resets the full range of the cells and, therefore, corrects FULL weight readings
as well.
For information on FULL weight calibration, see Recalibrating of Load Cells on
page 68.