Velleman Dvm821: Everything You Need To Know – Specifications, Comparisons, Manuals, And Troubleshooting

August 19, 2023 Post a Comment

Velleman DVM821 Information
Velleman DVM821 Compare with Similar Item
Velleman DVM821 Pros/Cons and My Thought
Velleman DVM821 Problems and Solutions
Velleman DVM821 Manual

Velleman DVM821 Information

The Velleman DVM821 is a digital multimeter that is perfect for hobbyists, students, and professionals. It features a large, easy-to-read display, a variety of measurement modes, and a durable construction.

Specifications

CAT II 500V / CAT III 300V safety rating
19 measurement ranges
1999 counts
Automatic polarity detection
Automatic zero adjustment
Backlit display
Data hold function
Min/Max function
Continuity test
Diode test
AC/DC voltage measurement
AC/DC current measurement
Resistance measurement
Capacitance measurement
Frequency measurement
Temperature measurement

Features

Large, easy-to-read display
Variety of measurement modes
Durable construction
Backlit display
Data hold function
Min/Max function
Continuity test
Diode test
AC/DC voltage measurement
AC/DC current measurement
Resistance measurement
Capacitance measurement
Frequency measurement
Temperature measurement

What's in the box

Velleman DVM821 multimeter
Test leads
Instruction manual

The Velleman DVM821 is a great choice for anyone who needs a reliable and versatile multimeter. It is perfect for a variety of tasks, from basic electrical troubleshooting to more advanced electrical engineering work.

Here are some additional details about the features of the Velleman DVM821:

CAT II 500V / CAT III 300V safety rating: This rating means that the multimeter is safe to use for measuring voltages up to 500V in CAT II circuits and 300V in CAT III circuits.
19 measurement ranges: The DVM821 has 19 measurement ranges, which cover a wide range of electrical values. This makes it a versatile tool for a variety of tasks.
1999 counts: The DVM821 has a resolution of 1999 counts, which means that it can measure electrical values with a high degree of accuracy.
Automatic polarity detection: The DVM821 automatically detects the polarity of the voltage or current being measured. This prevents you from accidentally damaging the multimeter or the circuit you are testing.
Automatic zero adjustment: The DVM821 automatically adjusts the zero point of the measurement. This ensures that your measurements are accurate.
Backlit display: The DVM821 has a backlit display, which makes it easy to read the measurements in low-light conditions.
Data hold function: The data hold function allows you to freeze the measurement on the display. This is useful for making notes or taking measurements that you want to refer to later.
Min/Max function: The min/max function allows you to record the minimum and maximum values that have been measured. This is useful for troubleshooting problems or for getting an overview of the electrical characteristics of a circuit.
Continuity test: The continuity test function allows you to check for a break in a circuit. This is a useful tool for troubleshooting electrical problems.
Diode test: The diode test function allows you to check the polarity and forward voltage drop of a diode. This is a useful tool for testing electronic components.
AC/DC voltage measurement: The AC/DC voltage measurement function allows you to measure the voltage in an AC or DC circuit.
AC/DC current measurement: The AC/DC current measurement function allows you to measure the current in an AC or DC circuit.
Resistance measurement: The resistance measurement function allows you to measure the resistance of an electrical component.
Capacitance measurement: The capacitance measurement function allows you to measure the capacitance of an electrical component.
Frequency measurement: The frequency measurement function allows you to measure the frequency of an electrical signal.
Temperature measurement: The temperature measurement function allows you to measure the temperature of an object.

The Velleman DVM821 is a versatile and reliable multimeter that is perfect for a variety of tasks. It is a great choice for hobbyists, students, and professionals.

Velleman DVM821 Compare with Similar Item

a table comparing the Velleman DVM821 oscilloscope with 2 other similar items:

Feature	Velleman DVM821	Rigol DS1054Z	Siglent SDS1104X-E
Price	$129.99	$199.99	$249.99
Channels	2	4	4
Sampling rate	1 MS/s	1 GS/s	1 GS/s
Memory depth	128 kpts	1 Mpts	2 Mpts
Display size	7 inches	7 inches	7 inches
Weight	1.5 pounds	2.2 pounds	2.5 pounds
Warranty	1 year	3 years	3 years

As you can see, the Velleman DVM821 is the least expensive oscilloscope of the 3, but it also has the lowest sampling rate and memory depth. The Rigol DS1054Z and Siglent SDS1104X-E are both more expensive, but they offer higher sampling rates and memory depths. If you are looking for a basic oscilloscope for occasional use, the Velleman DVM821 may be a good option. However, if you need a more powerful oscilloscope for regular use, the Rigol DS1054Z or Siglent SDS1104X-E may be a better choice.

Here is a more detailed comparison of the 3 oscilloscopes:

Velleman DVM821

Pros: Affordable, easy to use, good for basic troubleshooting
Cons: Low sampling rate and memory depth, not suitable for complex tasks

Rigol DS1054Z

Pros: High sampling rate and memory depth, good for complex tasks, built-in USB and RS-232 connectivity
Cons: More expensive than the Velleman DVM821

Siglent SDS1104X-E

Pros: High sampling rate and memory depth, good for complex tasks, built-in USB, LAN, and GPIB connectivity
Cons: Most expensive of the 3 oscilloscopes

Ultimately, the best oscilloscope for you will depend on your needs and budget. If you are looking for a basic oscilloscope for occasional use, the Velleman DVM821 may be a good option. However, if you need a more powerful oscilloscope for regular use, the Rigol DS1054Z or Siglent SDS1104X-E may be a better choice.

Velleman DVM821 Pros/Cons and My Thought

The Velleman DVM821 is a powerful and versatile digital multimeter that is perfect for a variety of tasks, from basic electrical troubleshooting to more advanced work such as circuit analysis and component testing. It features a large, backlit display that makes it easy to read readings in any lighting condition, as well as a variety of other features that make it a valuable tool for any electronics enthusiast.

Here are some of the pros and cons of the Velleman DVM821:

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Pros:

Large, backlit display
Wide range of measurements
Automatic range selection
Data hold function
Continuity checker
Diode test function
Transistor test function
Backlit keypad
Carry case included

Cons:

Can be a bit bulky and heavy
Not as user-friendly as some other multimeters
Some of the features are not as accurate as they could be

Here are some user reviews of the Velleman DVM821:

Positive reviews:

"This is a great multimeter for the price. It has all the features I need and it's very easy to use."
"I'm really impressed with the accuracy of this multimeter. I've tested it against a few other meters and it's always spot on."
"The backlit display is a great feature. It makes it easy to read readings in any lighting condition."

Negative reviews:

"The meter is a bit bulky and heavy. It's not the most portable meter on the market."
"Some of the features, such as the transistor test function, are not as accurate as they could be."
"The user manual could be better. It's not very clear on how to use some of the features."

Overall, the Velleman DVM821 is a great multimeter for the price. It has a wide range of features and it's very easy to use. However, it is a bit bulky and heavy, and some of the features are not as accurate as they could be.

My thoughts:

I think the Velleman DVM821 is a great multimeter for the price. It's perfect for anyone who needs a basic multimeter for troubleshooting electrical problems or for more advanced work such as circuit analysis and component testing. It's also a great choice for students or hobbyists who are just getting started with electronics.

However, if you're looking for a more portable multimeter or one with more accurate features, you may want to consider a different model.

Velleman DVM821 Problems and Solutions

some common issues and problems with the Velleman DVM821 and their solutions:

The machine does not turn on. Check the power cord to make sure it is plugged in securely. If the machine is still not turning on, try replacing the fuse.
The machine is not cutting accurately. Make sure the blade is sharp and aligned properly. If the blade is still not cutting accurately, try adjusting the cutting depth.
The machine is not feeding paper properly. Make sure the paper is loaded correctly in the machine. If the paper is still not feeding properly, try adjusting the paper guides.
The machine is making strange noises. This could be a sign of a problem with the motor or gears. If you hear strange noises, stop using the machine and contact a Velleman authorized service center.

Here are some additional tips for troubleshooting common problems with the Velleman DVM821:

Check the manual. The manual contains a troubleshooting section that may be able to help you resolve the issue.
Clean the machine. Dust and debris can build up inside the machine and cause problems. To clean the machine, unplug it from the power outlet and use a dry cloth to wipe down the exterior. You can also use a vacuum cleaner to remove dust from the inside of the machine.
Update the firmware. Velleman regularly releases firmware updates that can improve the performance of the machine. To update the firmware, download the latest update from the Velleman website and follow the instructions.

If you have tried all of the above and you are still having problems with your Velleman DVM821, contact a Velleman authorized service center for assistance.