DT830B Digital Multimeter

The DT830B is a digital multimeter that can measure AC and DC voltage, DC current, resistance. It has diode and transistor test functions as well.

For your convenience the device has a large display. Compact size and light weight will allow you to take it with you simply putting in into your pocket.

DC Voltage (DCV)	1000 V
AC Voltage (ACV)	750 V
DC Current (DCA)	10 A
Resistance	2 MΩ
Diode test	+

Specifications

• Wide operating temperature: 32°F to 104°F / 0°C to 40°
• Storage temperature: 10°F to 122°F / -12°C to 50°C.
• Relative humidity: 75%
• 3,5digit LCD, 7 segment, 0.5" high
• Dimensions: 5x2.8x1 in / 126x70x25mm
• Weight: 6 oz / 170g

AC voltage

Frequency range: 45Hz to 450Hz.

Range / Resolution / Accuracy:

• 200V; 100mV; ±1.2 % ± 10
• 750V; 1V; ±1.2 % ± 10

DC voltage

Range / Resolution / Accuracy

• 200mV; 0.1mV; ±0.5 % ± 2
• 2000mV; 1mV; ±0.5 % ± 2
• 20V; 10mV; ±0.5 % ± 2
• 200V; 100mV; ±0.5 % ± 2
• 1000V; 1V; ±0.8 % ± 2

Input impedance: 1MΩ.
Maximum input voltage: 1000V DC or 750V rms (200mV scale: 500V DC or 350V AC rms)

DC current

Range / Resolution / Accuracy

• 200µA; 0.1µA; ±1.0% ± 2
• 2000µA; 1µA; ±1.0% ± 2
• 20mA; 0.01mA; ±1.0% ± 2
• 200mA; 0.1mA; ±1.5% ± 2
• 10A; 10mA; ±3.0% ± 2

Overload protection: F250mA 250V fuse (10A range is unfused!).

Resistance

Range / Resolution / Accuracy

• 200Ω; 0.1Ω; ±0.8% ± 3
• 2000Ω; 1Ω; ±0.8% ± 2
• 20kΩ; 10Ω; ±0.8% ± 2
• 200kΩ; 100Ω; ±0.8% ± 2
• 2000kΩ; 1kΩ; ±1.0% ± 2

Maximum open circuit voltage: 3.2V.
Overload protection: 250V rms. AC on all ranges.

Diode testing

• Voltage approx.: 2.8V
• Current: 1mA.
• Overload protection in the diode test mode: 250V RMS AC.
• Over range: LCD will indicated "1"

AC voltage measurement

• Connect the red lead to "VΩmA" and the black one – to "COM"
• Set the rotary switch to the required V~ range
• Connect the test leads across the source or load that you would like to measure. Check the voltage value on the LCD.

DC voltage measurement

• Connect the red test lead to "VΩmA” and the black one – to "COM”.
• Set the rotary switch to the required range. If you do not know the voltage which should be measured set the range switch at the highest range position and then reduce it until the required resolution.
• Connect the test leads across the source or load that you would like to measure. Check the voltage value and polarity on the LCD.

DC current measurement

• Connect the red test lead to "VΩmA” and the black one – to "COM”. To measure current between 200mA and 10A, insert the red lead into "10A” (unfused) jack.
• Set the rotary switch to the required range.
• Open the circuit in which the current should be measured and connect the test leads in series with the circuit.
• Check the voltage value on the LCD as well as the polarity of red lead connection.

Resistance measurement

• Connect the red test lead to "VΩmA” and the black one – to "COM”. In this mode the red lead polarity is positive “+”.
• Set the rotary switch to the required range.
• Connect the test leads across the resistance that should be measured and see the results on the LCD.

Note: If the resistor under measurement is connected to a circuit, turn the power off and discharge all capacitors before applying measurements!

Transistor test

Before transistors insertion into the socket for testing make sure to disconnect the test leads from any measurement circuits. No components should be connected to the hFE socket when making voltage measurement with the test leads!

• Set the rotary switch to "hFE”.
• Determine the transistor type under testing, NPN or PNP, and locate the emitter, base and collector leads.
• Insert the leads into the proper sockets of hFE.

Diode test

• Connect the red test lead to "VΩmA” and the black one – to "COM”. The red lead polarity is positive "+”.
• Set the rotary switch to diode position.
• Connect the red lead to the diode anode under testing and the black lead – to the diode cathode.
• Check the results in mV on the LCD. If the connection is reversed there will be "1” figure displayed.