Chapter 8 Load Cell Module AS02LC
8- 15
In addition to this two-point adjustment, the load cell also supports adjustments of up to 20 points. A
characteristic curve is shown below.
Digital value
(LSB)
Point 1
Weight
K1000
K10000
K0
1 kg
10 kg
Adjusting multiple points
Point 2
Point 3
Point 4
Point 5
6. Determining theoretical calibration
Theoretical calibration is determined according to the sensor specification in order to input the voltage values
corresponding to various weights. The registers for storing the voltage values are CR#700–739 for CH1 and
CR#740–779 for CH2. After entering the voltage values into the registers, you can use the command set
16#301–302 to execute the calibration.
Example: the sensor specification is 10 kg and its eigenvalue is 2 mV/V. When the sensor is loaded with a 10
kg weight, the output is 10 mV. The theoretical calibration steps are:
Step 1: set the eigenvalue.
Step 2: set the 2-point adjustment; when the sensor is loaded with a 1 kg weight, set the value to 1000.
Step 3: set the voltage calibration for the zero point to 0 (0 mV) in the CR#700/701 registers, and to 1.0 (1
mV) in the CR702/703 registers.
Step 4: enable the calibration function and enter 98 into the command set CR#201.
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