What are the various characteristic features of strain gauge load cell?
What are the various characteristic features of strain gauge load cell?
The characteristics of the strain gauge load cell are as follows: 1. Highly precise measurements with little influence due to temperature changes 2. Long distance communication or command is possible as the output is an electrical signal.
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.
What makes a good load cell?
Look Into Your Capacity Requirements To make sure you have the optimal capacity, go for a load cell that exceeds your highest operating load. To ensure you have the optimal load cell capacity, consider possible variances that could arise like nonlinearity, bridge resistance and hysteresis.
What is accuracy of load cell?
The key specifications for a load cell that will provide accurate weight information are: • Nonlinearity: ±0.018 percent of the load cell’s rated output. Non-repeatability: ±0.01 percent of the load cell’s rated output. • Creep: ±0.01 percent of the load cell’s rated output in 5 minutes.
How many types of load cells are there?
When classified by the direction of load detection, load cells can be divided into the following types: tension, compression, alternating, and bending. Based on precision, load cells can be classified as ultra precision, precision, standard, and general-purpose.
What are the specifications of a load cell?
Suppose the specifications of the load cell are as follows: Rated capacity: 6 kg Rated output: 1 mV/V Recommended excitation voltage: 10 V When the rated output is 1 mV/V and the excitation voltage is 10 V, the load cell will output 10 mV to the indicator. This is the output voltage when the rated capacity of 6 kg is loaded.
When does a load cell produce an output signal?
When a force is applied to it in a specific manner, a load cell produces an output signalthat is proportional to the applied force. Strain gage load cells are at the heart of the majority of weighing and force measurement devices produced today.
How to calculate the sensitivity of a load cell?
Since the load cell will output 10 mV for a load of 6 kg, 1.6 V 0.001666 mV 6000 10 mV X 6000 X 1 10 mV 1 : 6000 X : 10 mV ≈ μ = = × = × = Therefore, the input sensitivity of the indicator must be lower than 1.6 μV. For example, if the input sensitivity of the indicator were 1.8 μV, 1 g display would not be possible. 2.2.
Why do load cells need a higher excitation voltage?
As stated previously, load cells require an excitation voltage to produce an output signal. A higher excitation voltage will produce a higher output voltage swing when a load is applied to the cell. So, bigger is better, right?