Contents
How do you determine the sensitivity of a load cell?
Calculating Load Cell Sensitivity If a load cell has a 5 Volt DC (VDC) excitation voltage and a 0-250 mV output, the resultant ratio is 250mV/5VDC. This equates to 50 mV per Volt or has a 50:1 ratio.
What is sensitivity of a load cell?
Load-cell sensitivity refers to the smallest force that a pair of load cells can reliably detect. The greater a load cell’s sensitivity , the better the cell is at detecting the slightest changes in tension. Load-cell sensitivity is the minimum amount of force needed to cause a change in a load cell’s output.
What is the rated output of a load cell?
The cell output is rated in millivolts per volt (mV/V) of the difference voltage at full rated mechanical load. So a 2.96 mV/V load cell will provide 29.6 millivolt signal at full load when excited with 10 volts. Typical sensitivity values are 1 to 3 mV/V. Typical maximum excitation voltage is around 15 volts.
What is resolution of load cell?
The resolution of a load cell is the smallest change in the input that causes a change in output. In other words, the resolution is a degree to which the smallest change can be theoretically detected. In the case of load cells, the resolution is the smallest increment that the system can weigh.
How is the sensitivity of a load cell determined?
Typical unamplified analog load cells have a sensitivity rating in units of mV/V. This load cell sensitivity rating is specified on a load cell data sheet often in the 1 mV/V – 3 mV/V range. Most quality load cells will come with a factory load cell calibration sheet which specifies the actual sensitivity rating for that individual load cell.
What is the output of a load cell?
Full scale output: The electronic output from a load cell. Measured at full scale. Units – mV/V Combined error: The maximum deviation of the measured reading from the straight line drawn between readings at zero (no-load) and rated capacity as plotted on a graph.
What is the compensated temperature range of a load cell?
Compensated temperature range: The temperature range in which a load cell is physically/electrically compensated to maintain rated output and zero balance (within limited specifications). Units – °F (°C)
What is on a load cell data sheet?
Every load cell on the market comes with a manufacturers’ data sheet. It lists the load cell’s performance specifications needed to determine if it meets an application’s requirements. These performance metrics also matter when determining if a load cell calibrates properly or is faulty. So what is on a load cell data sheet?