Digital Load Cell Advantages

- Sep 20, 2017 -

Digital weighing sensor and digital measuring instrument technology development has gradually become the latest must-haves in the weighing technology, its easy to debug the advantages of the high efficiency, ability to adapt to the scene is in the field. The main products of our company QYE sensors are analog sensor, but the vehicle balance and static track scale are all updated to the digital weighing sensor.

Compared with analog sensor, the following characteristics of digital weighing sensor are better to meet the requirements of process control:

1. High reliability, strong anti-jamming ability and good lightning protection performance:

The analog sensor is powered by the instrument and the excitation voltage of the bridge is equal to the power supply of the external instrument. In the industrial site, between the instrument and the sensor are susceptible to strong electrical interference and surge, resulting in unstable data and even instantaneous burning of the sensor.

2. The digital sensor adopts all-sealed stainless steel laser welding technology, and the inner - filled helium gas protects the internal circuit to work reliably, and the protection level reaches IP68. Added all kinds of protection circuit and lightning protection design, power supply provided by the instrument for processing first, stabilized and then used in the bridge excitation, eliminates the surge interference from power and lightning, the sensor output and stable signal, guarantee the normal work of the sensor.

3. uninterrupted work Digital weighing system can ensure the continuity of production, the realization of continuous work, instrument not only monitor the working condition of all digital sensors, and the discovery of a sensor failure, the instrument can automatically start non-stop work, still can guarantee a certain time under a certain accuracy of weighing, unapt cause production downtime. At the same time, the instrument will send out signal to the user and locate the fault sensor to request replacement.

4. Once the sensor has a fault, the analog sensor system can not be weighed, thus causing the major event of shutdown.

  • Advantages:

1. The transmission distance, the speed of communication, the anti-cheating effect is remarkable:

Traditional analog weighing sensor output signal is small, usually for millivolt level, due to the effect of cable resistance in the process of transmission loss of signal, but also are vulnerable to the interference of the surrounding environment, so can't for long distance transmission. It has a lot of ways to cheat and it's hard to control. And digital weighing sensor with digital output signal, not only high level, the influence of interference is very small, and it is the field bus technology, super fast communication speed, with the communication error correction function, due to the confidential communications protocol, cheating is basically impossible, so the data reliability.

2. Strong anti-interference ability, high reliability and good lightning protection:

Analog sensor power supply from instrument output, power quality is affected by the instrument. They are also susceptible to electromagnetic interference and surge. The instability of the power supply is also very important to the output of the sensor, which can cause the instability of the output, and the instantaneous high voltage can also cause the damage of the sensor. The digital sensor adopts the new welding technology, and it is safe with helium protection circuit, which is very high. In order to prevent the interference of lightning surge, it adopts the output voltage of instrumentation for reprocessing, satisfies the requirement of power supply voltage of the sensor, the output signal is stable, the sensors are not damaged.

3. Exemption of calibration:

Weighing sensors to the site, there is no proper weight system, it is difficult to calibrate, if it is not calibrated, the error can be large. The analog sensor has to be calibrated because of the loss in the field. The current digital sensor can be exempted from the job because it has been calibrated with a standard measuring machine in the production, and its output is corresponding to the standard value. Since it is basically free of loss in transmission engineering, the readout value is the actual measurement value, so it can save the calibration of this link.

4. Work without interruption:

Digital sensor with fault error function, once appear, fault, it will output signal to the instrument and meter receive the signal, can abandon its values, to automatically start non-stop work, still can guarantee a certain accuracy, the user can also know which sensor need to be replaced at any time, will not cause the stagnation of production. However, the analog sensor can not meet the requirements, and the failure will cause the production shutdown and affect the efficiency of the plant.

5. Convenient maintenance and low overall cost:

Digital weighing sensor with cable connection with a standard plug, both to ensure the protection grade, and replace the sensor or the cable is very convenient, at the same time because of its digital output, not influenced by the length of the cable. And the analog sensor its temperature compensation is with cable, cable damage after random connections can cause error, so a lot of sensors are connected with cable, when they need to replace the threading, use rise very inconvenient. 

Now, it seems, although digital sensors is more than the analog sensor circuit board, but in the process of use without calibration, debugging time will be reduced, higher reliability, it has self-diagnosis function, for some production can't shutdown of the unit, it also can guarantee uninterrupted work, saves the production cost, so in general, it uses the overall cost is lower than analog sensors.

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