What is load cell amplifier?

A load cell amplifier is a device that can increase the strength of signals coming from a load cell. Sometimes, the signals produced by the load cell can be feeble and low strength signals may not work with certain components of the measuring system like a data logger for load cells or load meter.

Can you use load cell without amplifier?

That load cell has a miniscule sensitivity. You need an amplifier of some sort… either a stand-alone amp or something like the HX711 with integral PGA. Or, if you happen to have a Mega2560, you could use its ADC in differential mode, with its PGA set to 200, and with the internal reference voltage.

What is INA125?

The INA125 is a low power, high accuracy instrumen- tation amplifier with a precision voltage reference. It. provides complete bridge excitation and precision dif- ferential-input amplification on a single integrated.

What type of amplifier circuit is used in load cell?

The most efficient type of amplifier to use for the load cell’s output signal is the instrumentation amplifier due to its large common-mode rejection ratio, high open-loop gain, low noise, low drift, very low DC-offset and very high input impedances.

How do you calibrate a load cell amplifier?

To calibrate the conditioner, remove any load from the transducer and adjust the variable resistor to an output of 0V or 4mA. To calibrate the full span, place the entire load on the transducer and adjust its variable resistor to an output of 10V or 20mA.

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 is excitation voltage in load cell?

Excitation voltage is the voltage required for the excitation of a circuit. For example, 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.

How often should a load cell be calibrated?

Calibration interval should not exceed 12 months. The frequency of calibrations should be determined by the user of the load cell based on the following factors: Frequency of use. Severity of service conditions.

What does 2 mV V mean?

A rated output of 2 mV/V signifies that a force transducer produces an output signal of 2 mV if it is supplied with one volt. Consequently, the output voltage is 10 mV at a transducer supply of 5 V.