Ittestjar Tagħbija Ċelloli Użu A Multimetru
Tagħbija ċelloli huma wiesgħa użati fi industrijali użin (bħal ċinturin skali, art skali, elettroniċi skali, bniedem skali, eċċ.) , force testing, and tension and pressure measurement. The failure of the load cell during field use is generally as follows.
1. The sensor is overloaded, the user and the manufacturer have not communicated clearly, the sensor range and the actual force value, and the weight do not match, causing the sensor to be overloaded, causing the sensor to be overloaded, causing the resistance of the sensor bridge arm to deform and causing the circuit to be unbalanced. The sensor does not work normally, the output signal fluctuates, the resistance is infinite and so on.
2. The lead wire of the sensor is broken, and the user has not taken protective measures during use. The lead wire of the sensor is broken. Generally, the breakage at the interface of the sensor lead wire affects the use of the sensor without response or the measured value changes f'daqqa.
3. Improprju use of the sensor. Matul l-użu ta' static sensor, there are impact forces, shearing forces, shearing forces, and torsion forces that seriously damage the sensor and cannot be repaired.
So how can we effectively use the multimeter to detect the common faults of the load cell on the spot?
1. The sensor manufacturer provides the sensor output sensitivity and power supply voltage before leaving the factory. We detect the sensor output signal according to these two parameters. The strain gauge load cell outputs an analog signal millivolt voltage. For example, the sensor output sensitivity is 2.0mV/V, and the power supply voltage is DC10V. The two parameters can provide us with the sensor excitation voltage that requires DC10V, and the sensor output signal corresponds to a linear relationship of 2.0mV per 1V excitation voltage. For example, the full scale of the sensor is 50KG, then the full scale output of DC10V voltage to the sensor is 20mV. According to this relationship, we use the multimeter mV gear to measure the output signal of the sensor. It is normal for the no-load output of the sensor to be 0mV, which is greater than this value, but close to this value, and the value change means that the sensor has zero drift. If the value is large, it means that the sensor is damaged or the internal bridge is a circuit, and the resistance of the bridge arm is asymmetrical.
2. Skont lil sensur parametri, input reżistenza u output reżistenza reżistenza pprovdut by the sensor, imħallef jekk is-sensor strain gauge is damaged. Sensor input and output resistance values vary from manufacturer to manufacturer. So this should be tested according to the manufacturer's label. Use a multimeter to detect the ohm position, the resistance of the resistance of the power ground, and the power ground, and the resistance of the signal line u is-sinjal l-art. Jekk it huwa akbar milli il-fabbrika reżistenza valur , it tfisser li is-sensor ġie tagħbija żejda u ir-razza gauge huwa deformat. Jekk ir-reżistenza valur huwa infinit , is-sensor razza gauge huwa serjament bil-ħsara u ma jistax ikun imsewwi.
3. Minħabba li l ċomb wajer is spiss imkisser matul l-użu of is-sensor, but the outer layer of the sheath wire is intact, so the sensor wire is intact by visual inspection. We use the ohm gear of the multimeter to detect the continuity of the sensor wire. If the resistance is infinite determine a break, if the resistance changes change bad contact.
