Measurement range and application method of digital multimeter

This article takes the DT-830 digital multimeter as an example to illustrate its measurement range and usage.

1. Measure the size 　

(1) DC voltage is divided into five levels: 200mV, 2V, 20V, 200V, and 1000V.

(2) The AC voltage is divided into five levels: 200mV, 2V, 20V, 200V, and 750V.

(3) DC current is divided into five levels: 200 mV, 2 mA, 20mA, 200mA, 10A.

(4) The AC current is divided into five levels: 200 mV, 2 mA, 20mA, 200mA, and 10A.

(5) Resistance is divided into six grades: 200 W, 2k W, 20k W, 200k W, 2M W, 20M W

2. Panel Description

(1) Display: Displays four digits. The highest digit can only display 1 or no digit, which is considered half a digit, so it is called three and a half digits (). The maximum indication is
1999 or -1999. When the measured value exceeds the maximum indication value, "1" or "-1" is displayed.

(2) Power switch: Turn the switch to the “ON” position when in use; turn the switch to the “OFF” position when finished.

(3) Conversion switch: used to select function and range. Select the corresponding function position according to the measured quantity (voltage, current, resistance, etc.); select the appropriate range according to the size of the measured range.

(4) Input socket: Insert the black test pen into the "COM" socket. There are three ways to insert the red test pen: insert it into the "VW" socket when measuring voltage and resistance; insert it into the "mA" socket when measuring current less than 200mA; insert it into the "10A" socket when measuring current greater than 200mA.