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Method of judging the good or bad of the groove -type photoelectric switch

At present, various photoelectric switches have been widely used in production areas such as automatic monitoring, automatic control, and automatic counting. In actual production and maintenance, according to the working principle of the photoelectric switch, the two multimeter uses the two multi -meters to quickly judge the quality of the slot -type photoelectric switch. Taking the groove -type photoelectric switch used on the electric winding machine as an example (also known as the "concave photoelectric switch), the test method is introduced to everyone.

First dial the multimeter to R & Times; 100 gear. The two tablets measure the positive and E of the C and E respectively, otherwise it should be infinite, otherwise it will be damaged or the performance will be worse. Then put the black table pen in the C foot, the red table pen is put on the E foot, and then the other universal form is dumped in R & Times; 1 gear, the black table pen is put on the A foot, the red table pen is put on the K foot, and the battery voltage inside the multimeter is used to use the voltage of the multimeter to use the voltage of the multimeter to use the voltage of the multimeter to use the voltage to use the voltage of the multimeter to use the voltage of the multimeter to make Optical transmission tubes work, at this time the resistance value of the C and E feet is immediately reduced to a smaller value. Remove the A and K foot pen, and the resistance values ​​of C and E will immediately restore to infinite large.

If the black table pen is put on the K foot and the red table pen is placed on the A foot, the infinite large resistance value of the C and E is unchanged, and the slot -type photoelectric switch can be judged that it is basically normal. Dial the multimeter with A and K to R & Times; LO or R & Times;; when the C and E foot's pitch resistance value will be gradually increased. The operating current of "output" also decreases, making the current flowing through the optoelectronic transmission tube smaller, the launch of infrared capacity weakened, and the optical receiving tube's pipe resistance has also increased, which can further prove that the optoelectronics switch is normal. It should be explained: If one uses a pointer -type universal meter and the other uses a digital multimeter, the digital multimeter should be connected to the foot C and E feet during testing, and the pointer -type multimeter connects A and K. This is because the diodes or resistance of the digital universal meter can only provide a small current, which is not enough to make the transmitted tube in the optoelectronic switch normal.

In practical applications, the size and shape of the photoelectric switch are very different due to different use occasions and uses. The slot -type optoelectronics switch is usually a standard concave shape. The optoelectronic transmission tubes and receiving pipes are located on both sides of the indaminal groove, and a photobark is formed. When the detected object passes through the imprint groove and blocks the optical axis, the photoelectric switch generates the detected switch signal. The slot -type photoelectric switching and turbulence is reliable, suitable for detecting high -speed changes in production monitoring places.