What are the characteristics and shape and measuring range of digital multimeter?

1.Characteristics of panel shape, measuring range and polarity of watch pen.     

Digital multimeter has the advantages of small volume, high precision, visual display, moderate price and so on. It has been widely used in electrical and electronic measurement.

2.Panel shape and measuring range.

At present, the digital multimeter is mostly used in DT-890. The DT-890 digital multimeter panel is shown in figure 1.It can automatically display the units and symbols of the measured values, such as Ω, kΩ, MΩ, mV, V, mA, A, μ F, etc. In addition to DC voltage (200mV~1000V), DC current (2mA~20A), AC voltage (2V ~ 700V) and HFE, additional test blocks such as AC current (200mA~20A) and capacitance (2000pF~20 μF) have been added.

 Fig.1  Diagram of DT-890 digital multimeter panel

3.Characteristics of pen polarity.

The red meter pen of the digital multimeter is the positive pole of the power output, and the black meter pen is the negative polarity of the power supply, contrary to the polarity of the pointer multimeter, this must be fully noted.

This article is from Allicdata Electronics Limited which offers a varity of digital multimeter for selecting.