M E A S U R E M E N T S Y S T E M S I N T E R N A T I O N A L
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MSI-3750 Digital Weight Indicator
◆
User Guide
message display will read “UNCAL’ED” and the numeric display
will read the weight in “Raw Counts” (internal A/D counts
divided by 10).
Note: Due to the very high resolution of “Raw Counts”, the display can and will exhibit
unstable readings with typical mechanical scale systems. This is not indicative of any
problem with the Meter or the load receptor. The sensitivity of the display is dependent on
the mV/V output of the load cell(s) and the Gain set in “INIT CAL”.
Using Raw A/D Counts to Balance Multiple Load Cells
connected by a Summing Box
1)
Use the preceding procedure to set the 3750 into Raw Counts.
2)
Turn all the pots of the summing box fully clockwise to maximize
the load cell outputs.
3)
Load each load cell as independently as possible and determine
which load cell has the lowest output in Raw Counts. Note the
reading of the lowest output load cell. This is the reference load
cell.
4)
Load, in sequence, the higher output load cells as independently
as possible. Adjust the corresponding pot for each load cell to
match the noted reading of the lowest load cell.
5)
Load the reference load cell with the test load again. Note the
new value.
6)
Repeat steps 4 and 5 until no further adjustment is required.
Remember that Raw Counts is typically 10 times the resolution
displayed so don’t worry about getting the readings exact.
7)
Once the readings have converged, enable Calibration and
calibrate the system with the “Init Cal” procedure.
Summary of Contents for MSI-3750
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