DT-830B 3½-Digit LCD Digital Multimeter – AC/DC Voltage, DC Current & Resistance
The DT-830B Digital Multimeter is a compact and easy-to-use handheld measuring instrument for electronics, electrical troubleshooting, laboratory work, education and DIY projects.
It features a clear 3½-digit LCD display and manual range selection for measuring DC voltage, AC voltage, DC current and resistance. It also provides diode testing and transistor hFE testing, making it a practical entry-level multimeter for electronics work.
Technical Specifications
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Model: DT-830B
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Display: 3½-Digit LCD
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Maximum Display: 1999 Counts
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Ranging: Manual
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Polarity: Automatic Negative Polarity Indication
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DC Voltage: Up to 1000V
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AC Voltage: Up to 750V
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DC Current: Up to 10A
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Resistance: Up to 2MΩ on Common Versions
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Diode Test: Yes
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Transistor hFE Test: Yes
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Low Battery Indication: Yes
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Power Supply: 1 × 9V Battery
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Input Terminals: COM / VΩmA / 10A
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Design: Compact Handheld
DC Voltage Measurement
Selectable DC voltage ranges typically include:
- 200mV
- 2000mV / 2V
- 20V
- 200V
- 1000V
This makes the DT-830B useful for testing batteries, Arduino circuits, ESP32 projects, DC power supplies and many other electronic circuits.
AC Voltage Measurement
Selectable AC voltage ranges:
The meter is average-responding and calibrated for RMS indication of sine-wave AC signals.
DC Current Measurement
Typical DC current ranges include:
- 200µA
- 2000µA / 2mA
- 20mA
- 200mA
- 10A
The dedicated 10A input terminal is used for high-current measurements.
Resistance Measurement
Typical resistance ranges include:
This is useful for checking resistors, wiring, electronic components and basic circuit troubleshooting.
Diode Test
The built-in diode test function allows the forward voltage drop of a semiconductor diode or junction to be checked.
It is useful for basic testing of:
- Rectifier Diodes
- Signal Diodes
- LEDs
- Transistor Junctions
- Other Semiconductor Components
Transistor hFE Test
The DT-830B includes a dedicated socket for basic NPN and PNP transistor hFE testing.
This allows users to perform a quick check of a bipolar transistor's DC current gain.
Easy Manual Range Selection
A central rotary selector allows the required measurement function and range to be selected manually.
Manual ranging is particularly useful for students and beginners because it helps users understand measurement ranges and electrical quantities.
Applications
Ideal for:
- Electronics Repair
- Arduino Projects
- ESP32 Projects
- Raspberry Pi Electronics
- Battery Testing
- Power Supply Testing
- Educational Laboratories
- STEM Projects
- DIY Electronics
- Component Testing
- Electrical Troubleshooting
- Hobby Electronics
- Workshop Use
Important Safety Notes
- Always select the correct measurement function and range before connecting the probes.
- When the expected voltage is unknown, begin with the highest available range.
- Never measure resistance or test diodes on a powered circuit.
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Current must be measured with the multimeter connected in series, not across the power supply.
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Move the red probe to the dedicated 10A terminal when using the 10A current range.
- Never attempt to measure voltage while the red probe remains connected to a current input.
- The 10A range on many DT-830B versions is unfused and should only be used according to the limitations specified for the particular meter.
- Exercise extreme caution when working with mains electricity.
- Do not use damaged probes, cables or a damaged multimeter.
- This is a basic general-purpose multimeter and should not be treated as a professional high-energy industrial safety meter.
Package Includes
- 1 × DT-830B LCD Digital Multimeter
- 1 × Pair of Test Leads
9V battery inclusion may vary by supplied version.
