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¦ PART II - OPERATION ¦
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LOAD CELL CALIBRATION
NOTE: Displays shown here are in full grams. 100 and 200 series
models are in 1/10 grams, with a decimal.
If your load cells already display a weight close to zero, plus or
minus 10 grams, you may skip this section and go directly to:
TURNING ON OUTPUTS (next page).
If your unit DOES NOT display an acceptable weight, you should
recalibrate them, that is reset your ZERO weight, at this time.
To do so:
BE SURE the weigh bin is EMPTY.
BE SURE the load cell plug is plugged into the side of the controller.
BE SURE the weigh bin is resting on the load cells freely.
BE SURE the air line to the dump valve is connected as it would be
during normal operation. A disconnected air line adds weight.
BE SURE The load cells and bin are not jammed in any way. To test for
this see that a light touch on 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.
LOAD CELL CALIBRATION:
The sequence of keystrokes is as follows:
Press: * Display will say: (PASSWORD)
Press: 22222 Display will say: (P x)
Press: *99 Display will say: (CAL OFF)
Press: * Display will say: (CAL ON )
Press: EXIT Display will say: (P x)
Press: ZERO Display will say: (--WAIT--)
followed by: (P 0)
Press: EXIT Display will say: ( x)
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 RECALIBRATION OF LOAD CELLS.
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¦ PROCEED TO: TURNING ON OUTPUTS ¦
¦ and MATERIAL TYPES NEXT PAGE ¦
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