Cara untuk menggunakan a multimeter untuk mengukur kedekatan sakelar
Itu kedekatan sakelar bisa menjadi diukur menggunakan a multimeter% 3b Pengukuran metode adalah juga sangat sederhana% 2c hanya memperlakukan itu sebagai a saklar.
So, let's understand what this proximity switch really is.
A proximity switch, as the name suggests, is a switch that only works when it is "close". The proximity switch should be classified as a position switch, and the biggest difference from our common travel switches is that the proximity switch can complete the position measurement work without touching the measuring object.
In short, the essence of proximity switches is still switches, but their working principles are different. Saat ini, common proximity switches on the market are roughly divided into the following categories:
Fotolistrik kedekatan sakelar: Melalui pantulan cahaya, kapan ada adalah hambatan pemblokiran the dipancarkan cahaya, the perangkat akan menghasilkan an on atau mati sinyal.
Hall type proximity switch: People may not be familiar with the term Hall, but in fact, Hall is a form of circuit that is sensitive to magnetic substances. When a magnetic object is detected, the circuit will change, and through the conversion circuit, the corresponding on or off signal will be output:
Capacitive proximity switch: When it comes to capacitive proximity switches, it is important to understand the issue of dielectric constant. When an object passes between the two electrode plates of a capacitor, the dielectric constant changes, which generates a signal that is then converted and output through a circuit.
How to use a multimeter to measure proximity switches?
Meskipun itu adalah juga a saklar% 2c itu pengukuran dari ini kedekatan saklar is agak khusus. Jika kita kita kita ukur pasti tidak menjadi mampu untuk mengukur apa pun, karena ini kedekatan sakelar membutuhkan daya pasokan selama normal operasi, just suka an listrik alat, yang kebutuhan to be terhubung ke a daya sumber. Sebagian besar dari mereka adalah DC 24V, yang adalah a tiga kawat kabel metode.
So, menghubungkan the power to the proximity switch is the first step in the pengukuran.
Setelah memasok daya ke ke kedekatan sakelar, we juga kebutuhan untuk memahami nya internal kabel metode. Let's take the three-wire proximity switch as an example. Teman siapa tahu beberapa sirkuit pengetahuan bisa mudah melihat itu the on-off of the proximity switch is related to a transistor. When an object is sensed in the main circuit of the proximity switch, the on-off change inside the circuit will occur, which will form a closed circuit at both ends of the load in the figure below, That is, a 24V power supply is added to both sides of the load, which is actually the working principle of the proximity switch.
When we use a multimeter to measure the voltage on both sides of the load, we can determine whether the proximity switch is on or off.
Tolong catatan itu jatuh tempo ke perbedaan bentuk dari kedekatan sakelar, it is tidak pasti apakah beban akhir saham the positif atau negatif kutub dengan kekuatan pasokan. Aktual pengukuran harus menjadi dibuat sesuai ke kami produk manual.
