No box in the list? Install the driver for its USB chip
(CH340 or
FTDI), then unplug and plug in the box.
Use Chrome or Edge on a computer. This page reads the load cell box over the USB cable
(Web Serial), which this browser does not support.
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Autosave: starting
Drag on the chart to select a time range.
Details
Last lines from the board:
Calibrate a cell (designer mode)
Put known loads on the cell one at a time and record each one. The page draws a
straight line through the recorded points; its slope is the cell's scale.
How you know the load. Known loads are in
, ram diameter mm
(force = pressure × ram area)
and the load
Record the points. First with no load: type 0 and press Record. Then for each load step:
set the load, type its value and press Record. Go up in steps and back down again.
Known load
Recorded points: known load, then the board's average raw reading.
Normally you do not type here; you can delete a bad line, or open points saved earlier.
Check the fit. Each point's error is the load the line reads minus the known load.
Name the cell. Cell id capacity kg
Note (optional, stored with the cell)
Copy the result into calibration.js (replace the cell's CELLS line; add the BOARDS line for a new board):
(record at least two points: no load and one known load)