What is load cell rated output?

What is load cell rated output?

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.

How can you increase the accuracy of a load cell?

The most important ones are listed below:

1. Temperature effect. As load cells are mostly constructed of either stainless steel or tool steel then temperature changes will influence the accuracy of a load cell.
2. Creep Effects. This is the change of load cell signal that occurs under load.
3. Repeatability.
4. Other factors.

How do you calculate load cell output?

The voltage output from the load cell can be calculated from the voltage VE applied to the load cell and the rated output RO. When a load of 500 g (rated capacity) is applied to the load cell, the output voltage is VE * RO = 2.0 V * 0.7 mV/V = 1.4 mV.

What does 2 mV v mean?

2 mV/V is a very common output signal for force transducers. A sensitivity of 2 mV/V means that a force transducer produces an output signal of 2 mV at nominal (rated) force, when supplied with one volt. With 5 V excitation voltage, the corresponding output voltage will be 10 mV.

How is the accuracy of a load cell determined?

For example: If a 1000 kg load cell has an error of ± 0.5%RO, it would mean the best resolution of the load cell would be ± 5Kg. Therefore, a panel meter configured to read full scale range (rated output) of 1000 kg on the display will read full scale accurately, but the last digit could be meaningless.

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 should be considered when choosing a load cell?

The above temperature effects listed need to be considered when operating outside of this range. Example: Using a 1,000 lb load cell with the following specifications: rated output 3.00 mV/V, compensated temperature range 10°C – 40°C, temperature effect on zero 0.05% FSO, and temperature effect on output 0.03% FSO.

What does% Ro mean for a load cell?

%RO accuracy specification for a load cell, what does it mean? Most load cell data sheets will specify a %RO, but what is this? The answer: %RO = percent of Rated Output. For example: If a 1000 kg load cell has an error of ± 0.5%RO, it would mean the best resolution of the load cell would be ± 5Kg.