mini and portable digital multimeter

Specifications

1.Digital Multimeter DT831B
2.Max display: 1999
3.Measuring DC & Ac voltage,DC current,resistance and diode
4.Good Quality

1.General characteristics

This instrument is a compact pocket-sized and integration design 3 1/2 digit multimeter for measuring DC and AC voltage, DC current, resistance, transistor, diode and battery check. This instrument is ideal for use in fields, such as hobby, home and DIYs user applications.

Maximum display: 1999
Polarity indication: Auto
Over range: "1" figure only in the display
Operating temperature: 0°C to 40°C
Storage temperature: -15°C to 50°C
Power supply: DC 9V (6F22)
Size: 103x75x21 mm
Weight: 60g (including battery)

2.Specification
Accuracies are ±(% reading+No.of digits) Granted for 1year, 23°C ±5°C less than 75% RH.

1)DC voltage

Ragnge	Accuracy	Resolution
200mV	±(0.5%+3)	100uV
2000mV	±(1.0%+5)	1mV
20V		10mV
200V		100mV
500V	±(1.2%+5)	1V

Input impedance: 1MΩ

Maximum input voltage: 500V DC or peak AC

2)DC current

Ragnge	Accuracy	Resolution
2000uA	±(2.0%+2)	1uA
20mA		10uA
200mA		100uA

Overload protection: PPTC fuse 0.2A/250V

3)AC voltage

Ragnge	Accuracy	Resolution
200V	±(2.0%+10)	100mV
500V		1V

Frequency range: 40-400Hz

Maximum input voltage: 500V rms AC

4)Resistance

Ragnge	Accuracy	Resolution
200Ω	±(1.0%+10)	0.1Ω
2000Ω	±(1.0%+4)	1Ω
20KΩ		10Ω
200KΩ		100Ω
2000KΩ		1KΩ

Overload protection: 250V DC/AC rms

Open circuit voltage: less than 2.8V

5)Battery check (1.5V and 9V)

Check 9V battery bearing power.

6)Diode test

Rang	Description	Test condition
	Display read	Forward DC current approx
	approx forward	1mA. Reversed DC
	voltage of diode	voltage approx 2.8 Volts.

7)Transistor Measurement

Base current approx 10uA, Vce approx 2.8V 

Display range: 0-1000