1. What is the accuracy level of the electrical instrument? When the electrical instrument is working under specified conditions, the percentage of the maximum basic error that may occur and the upper limit of the meter's measurement is called the accuracy level of the meter. Its calculation formula is: ±K=Δm/Am *100% The accuracy level of the ±K-meter in the formula; 2. What types of commonly used electrical measuring instruments are there? Laser radar contains LSPD safety laser scanner and LS laser radar. LSPD safety laser scanner is type 3 with CE certificate. It can be used for agv safety and industrial area protection. LS laser radar is for agv guide. Many famous agv manufacturers has installed LS laser radar to guide their agvs. Feedback from customers are quite posotive. Laser Radar,Auto Guided Vehicle Guide Radar, Laser Radar,Safety Scanner,Safety Laser Scanner, Laser Radar Jining KeLi Photoelectronic Industrial Co.,Ltd , https://www.sdkelien.com
Δm - the maximum basic error expressed in absolute error;
Am-meter's upper measurement limit.
Therefore, the accuracy level of the electrical instrument is the value of the maximum reference error when the instrument is used under the specified working conditions.
Usually divided into four types:
(1) Direct reading indicator. When measuring, the pointer is deflected, and the amount of electricity to be measured is directly read out, such as a voltmeter, an ammeter, a power meter, a multimeter, and the like.
(2) Compare the meter. The measurement needs to be compared with the corresponding standard quantity to read the ratio of the two. For example, the Wheatstone bridge is used to measure the resistance, and the universal bridge is used to measure the capacitance and the inductance. Often used to accurately measure some electrical quantities and to test other instruments or instruments.
(3) Graphic instrument. Specifically used to show the relationship between two related quantities. Such as an oscilloscope, this instrument has a good visual effect, but it can only be used as a rough test.
(4) Digital meters. The measured analog quantity is converted into a digital quantity and directly read out, for example, a commonly used digital voltmeter, a digital multimeter, and the like.
How is the electrical instrument classified? What are the basic requirements for electrical instruments?
There are many types of electrical instruments, and there are usually different classification methods.
(1) According to the working principle: there are electromagnetic, magnetoelectric, electric, inductive, rectifying, thermoelectric, electrostatic, electronic and so on.
(2) According to the nature of the measurement: there are ammeter, voltmeter, power meter, ohmmeter, electricity meter, power factor meter, frequency meter, multimeter, etc.
(3) According to the way of use: switch board and portable. Switch panel meters are usually fixed on the switch board or switchboard with large errors. Portable meters generally have small errors and high accuracy.