What are the main parameters of the potentiometer test

The naming rules for potentiometers are the same as the naming method for resistors, but they start with the letter W. Its marking method is to use the straight labeling method, and the type, nominal power, resistance, and the relationship between the resistance and the rotation angle are marked with letters and numbers on the potentiometer shell. The following article will tell you about the test of the potentiometer, whether it is good or bad, and what are its main parameters?

What are the main parameters of potentiometer testing?

The main requirements for the potentiometer are: â‘  The resistance value meets the requirements. â‘¡ The contact between the center sliding end and the resistor is good, and the rotation is smooth. For the potentiometer with switch, the switch part should be accurate, reliable and flexible. Therefore, the performance of the potentiometer must be checked before use.

Resistance measurement: Firstly, according to the resistance value of the potentiometer, choose the appropriate resistance range of the multimeter, measure the resistance value, that is, the resistance value between the two ends of the AC, compare with the nominal resistance value Are the people consistent? Rotate the sliding contact at the same time, and its value should be fixed. If the resistance is infinite, the potentiometer is damaged.

Then measure the contact between the center end and the resistor, that is, the resistance between the two ends of BC. The method is that the multimeter's ohm level is in the appropriate range. During the measurement process, slowly rotate the rotating shaft, pay attention to observe the multimeter's reading, under normal circumstances, the reading changes steadily in one direction. Failure of poor contact.

When the center end slides to the head end or the end, the resistance value of the center end and the coincidence end is 0 under ideal conditions. In actual measurement, there will be a certain residual value (generally depending on the nominal, generally less than 5Ω), which is normal .

Looking for deals? digital potentiometer programmable from Heisener is the right answer. Request a real-time quote on our web and choose from different manifacturers.

related articles：

Identification method of potentiometer

The main parameters of the potentiometer

Common types of potentiometers

Why a crystal oscillator is needed in the circuit

What types of potentiometer

Posted by: nderfobapeha at 06:24 AM | Comments (3) | Add Comment
Post contains 391 words, total size 3 kb.