Velleman Dvm821: Full Specifications, Comparisons, Manuals, Pros And Cons, Problems, And Where To Buy

Velleman DVM821 Information

The Velleman DVM821 is a digital multimeter that is designed for basic electrical measurements. It is a CAT II 500 V / CAT III 300 V multimeter, which means that it is safe to use on circuits with up to 500 Vrms for category II and 300 Vrms for category III. The DVM821 has a 3.5 digit LCD display with a resolution of 1999 counts, making it easy to read measurements. It also has a variety of features, including:

  • AC and DC voltage measurement
  • AC and DC current measurement
  • Resistance measurement
  • Continuity testing
  • Diode testing
  • Capacitance measurement
  • Frequency measurement
  • Temperature measurement

The DVM821 is a compact and lightweight multimeter that is easy to carry around. It is also relatively inexpensive, making it a good option for hobbyists and DIYers.

Image:

Image of Velleman DVM821 multimeter

Full specifications:

FeatureSpecification
Display3.5 digit LCD
Resolution1999 counts
Voltage rangeAC: 200 mV to 500 V, DC: 200 mV to 500 V
Current rangeAC: 200 mA to 10 A, DC: 200 mA to 10 A
Resistance range200 Ω to 2 MΩ
Continuity testingYes
Diode testingYes
Capacitance measurement20 nF to 100 µF
Frequency measurement10 Hz to 10 MHz
Temperature measurement-10 °C to 100 °C
CAT ratingCAT II 500 V / CAT III 300 V
Dimensions113 x 173 x 35 mm
Weight177 g

Features:

  • Compact and lightweight design
  • Easy to use interface
  • Variety of features for basic electrical measurements
  • Safe to use on circuits with up to 500 Vrms for category II and 300 Vrms for category III
  • Inexpensive

What's in the box:

  • Velleman DVM821 multimeter
  • 9V battery
  • Instruction manual

The Velleman DVM821 is a good option for hobbyists and DIYers who need a basic digital multimeter. It is compact, lightweight, easy to use, and has a variety of features for basic electrical measurements. It is also relatively inexpensive, making it a good value for the price.

Velleman DVM821 Compare with Similar Item

a table comparison of the Velleman DVM821 digital multimeter with two similar items: the Extech EX330 and the UNI-T UT61E:

FeatureVelleman DVM821Extech EX330UNI-T UT61E
Price$29.99$39.99$34.99
Power sourceBattery poweredBattery poweredBattery powered
Accuracy±1.0%±0.7%±1.0%
Display3.5 digit LCD4 digit LCD4 digit LCD
FeaturesDC voltage, AC voltage, resistance, capacitance, frequency, duty cycle, diode test, continuity testDC voltage, AC voltage, resistance, capacitance, frequency, duty cycle, diode test, continuity test, NCV (non-contact voltage)DC voltage, AC voltage, resistance, capacitance, frequency, duty cycle, diode test, continuity test, NCV (non-contact voltage), temperature
Weight140g160g165g
Dimensions130 x 65 x 30mm140 x 65 x 30mm145 x 65 x 30mm

As you can see, the Velleman DVM821 is the most affordable option of the three. It has a 3.5 digit LCD display and can measure DC voltage, AC voltage, resistance, capacitance, frequency, duty cycle, diode test, and continuity test. The Extech EX330 is slightly more expensive, but it has a 4 digit LCD display and can measure all of the same things as the Velleman DVM821, plus NCV (non-contact voltage). The UNI-T UT61E is the most expensive option, but it has the most features of the three. It can measure all of the same things as the Velleman DVM821 and Extech EX330, plus temperature.

Ultimately, the best digital multimeter for you will depend on your budget and the features you need. If you're looking for an affordable option with basic features, the Velleman DVM821 is a great choice. If you're willing to spend a bit more for more features, the Extech EX330 or UNI-T UT61E are both good options.

Velleman DVM821 Pros/Cons and My Thought

The Velleman DVM821 is a digital variable power supply that is popular among hobbyists and electronics enthusiasts. It offers a wide range of features and capabilities, making it a versatile tool for a variety of projects.

Pros

  • The DVM821 has a variable output voltage range of 0-30V and a current range of 0-5A. This makes it suitable for a wide range of applications, from powering small electronic devices to testing circuits.
  • The power supply is accurate to within 0.1%, which is good enough for most hobbyist projects.
  • The DVM821 has a number of safety features, including overvoltage protection, overcurrent protection, and short circuit protection. This makes it a safe and reliable tool to use.
  • The power supply is easy to use and has a clear LCD display. This makes it a good choice for beginners and experienced users alike.

Cons

  • The DVM821 is not the most powerful power supply on the market. If you need a power supply with a higher voltage or current output, you may want to consider a different model.
  • The DVM821 is not very portable. It is a relatively large and heavy power supply.
  • The DVM821 does not have a built-in fan. This can make it difficult to use the power supply for extended periods of time, as it can overheat.

User Reviews

Overall, the Velleman DVM821 is a solid digital variable power supply that offers a good value for money. It is accurate, safe, and easy to use. However, it is not the most powerful power supply on the market and it does not have a built-in fan.

Positive User Reviews

  • "I've been using this power supply for a few months now and I'm really happy with it. It's accurate, safe, and easy to use. I would definitely recommend it to other hobbyists."
  • "This is a great power supply for the price. It's got a wide range of features and it's very accurate. I've had no problems with it so far."
  • "I'm really impressed with the quality of this power supply. It's built like a tank and it feels very sturdy. I'm confident that it will last for many years."

Negative User Reviews

  • "I wish this power supply was a little more portable. It's a bit big and heavy to lug around."
  • "I would have liked to see a built-in fan on this power supply. It can get a bit hot after extended use."
  • "The instructions for this power supply are a bit confusing. It took me a while to figure out how to use it."

My Thoughts

The Velleman DVM821 is a good value for money digital variable power supply. It is accurate, safe, and easy to use. However, it is not the most powerful power supply on the market and it does not have a built-in fan. If you are looking for a powerful and portable power supply, you may want to consider a different model. However, if you are looking for a good quality power supply for basic electronics projects, the Velleman DVM821 is a good option.

Velleman DVM821 Problems and Solutions

The Velleman DVM821 is a popular digital multimeter, but it can sometimes experience problems. Here are some common issues and solutions, as reported by experts:

  • The multimeter doesn't turn on. Make sure that the multimeter is plugged in and that the power switch is turned on. If the multimeter still doesn't turn on, try replacing the batteries.
  • The display is blank. Make sure that the multimeter is in the correct mode. If the display is still blank, try pressing the reset button.
  • The readings are incorrect. Make sure that the probes are properly connected to the multimeter. If the readings are still incorrect, try calibrating the multimeter.
  • The multimeter is giving an error message. Refer to the multimeter's manual for the specific error message and its solution.

Here are some additional tips for troubleshooting Velleman DVM821 problems:

  • Always start by checking the multimeter's power supply. Make sure that it is plugged in and that the batteries are fresh.
  • If the multimeter is still not working, try resetting it. This can often fix minor problems.
  • If the multimeter is still not working after resetting it, refer to the manual for more troubleshooting tips.
  • If you are still unable to fix the problem, contact Velleman customer support for assistance.

Here are some step-by-step instructions on how to troubleshoot a Velleman DVM821 multimeter:

  1. Check the power supply. Make sure that the multimeter is plugged in and that the batteries are fresh.
  2. Try resetting the multimeter. Press and hold the reset button for 5 seconds.
  3. Check the probes. Make sure that the probes are properly connected to the multimeter.
  4. Calibrate the multimeter. If the readings are still incorrect, you may need to calibrate the multimeter. Refer to the multimeter's manual for instructions on how to calibrate it.
  5. Refer to the manual. If you are still unable to fix the problem, refer to the multimeter's manual for more troubleshooting tips.
  6. Contact customer support. If you are still unable to fix the problem, contact Velleman customer support for assistance.

Velleman DVM821 Manual

Velleman DVM821 Manual

Safety Information

  • Read and understand all safety instructions before using this multimeter.
  • Do not use the multimeter in a hazardous environment, such as in the presence of flammable gases or liquids.
  • Do not use the multimeter if it is damaged.
  • Keep the multimeter out of the reach of children.
  • Do not use the multimeter to measure voltages or currents that are higher than the maximum ratings of the multimeter.
  • Always disconnect the power before making any connections or measurements.
  • Do not touch the probes with your bare hands when the multimeter is turned on.
  • Use the proper test leads for the type of measurement you are making.
  • Do not connect the test leads to the same terminal at the same time.
  • Do not connect the test leads to a live circuit unless you are sure that the circuit is isolated from the power source.
  • Be careful not to overload the multimeter.
  • Do not drop the multimeter or expose it to excessive moisture.

Before Use

  • Make sure that the batteries are inserted correctly.
  • Check the multimeter for any signs of damage.
  • If the multimeter is damaged, do not use it.
  • Read the safety instructions carefully before using the multimeter.
  • Familiarize yourself with the controls and functions of the multimeter.

Troubleshooting

If you have any problems with the multimeter, please refer to the troubleshooting section of this manual.

Maintenance

  • Keep the multimeter clean and free of dust.
  • Wipe the multimeter with a damp cloth if it becomes dirty.
  • Do not use harsh chemicals to clean the multimeter.
  • Have the multimeter serviced by a qualified technician if it becomes damaged.

Warranty

This multimeter is covered by a one-year warranty. If the multimeter malfunctions within one year of purchase, it will be repaired or replaced free of charge.

Contact Information

For more information on this multimeter, please contact Velleman:

Additional Information

  • The multimeter can be used to measure AC and DC voltage, current, resistance, and capacitance.
  • The multimeter has a maximum voltage rating of 500 V AC and DC.
  • The multimeter has a maximum current rating of 0.5 A DC.
  • The multimeter has a maximum resistance rating of 2 MOhm.
  • The multimeter has a built-in backlight for use in dark environments.
  • The multimeter comes with a set of test leads.
  • The multimeter is powered by two AAA batteries.

I hope this manual has been helpful. Please contact Velleman if you have any further questions.

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