Digital Multimeter Tester 7 Functions – The Best Guide

Thanks for visiting your comprehensive guide on digital multimeter testers with 7 functions. In the following paragraphs, we shall explore the advantages of employing a digital multimeter tester, the importance of understanding how to use a multimeter testers, and analyze the cost and value of Cen Tech digital multimeters. Whether you’re a newbie or a seasoned professional, this guide will provide you with the knowledge and insights to get the most from your digital multimeter tester.

Key Takeaways:

Digital multimeter testers with 7 functions offer a variety of measurements featuring
Understanding how to use a Cen Tech 7 Function Digital Multimeter is essential for accurate readings
The price of Cen Tech digital multimeters varies according to features and gratification
Proper safety precautions and operating instructions are essential when utilizing a multimeter
Accessories and accessories can improve the functionality and versatility of any multimeter

Understanding Digital Multimeter Tester 7 Functions

In order to effectively employ a digital multimeter tester, it is important to use a thorough understanding of its various functions. A digital multimeter tester is really a versatile tool utilized for electrical testing and measurements, able to providing accurate readings across multiple parameters.

With a digital multimeter tester, it is possible to carry out the following measurements:

Voltage: Determine the electrical potential difference between two points inside a circuit.
Current: Appraise the flow of electric charge by way of a circuit.
Resistance: Determine the opposition towards the flow of electric current inside a circuit.
Continuity: Test if a circuit is complete or broken.
Diode: Look into the functionality of diodes in a circuit.
Capacitance: Appraise the ability of the component to keep electrical charge.
Frequency: Determine the quantity of cycles per second in an electrical signal.

Knowing the functions of any digital multimeter tester is important for accurate measurement and troubleshooting. It allows you to diagnose electrical issues, identify faulty components, and ensure the appropriate functioning of circuits and devices.

Here are some ideas to effectively utilize a digital multimeter tester:

Browse the user manual: Get to know the specific features and operating instructions of your own multimeter.
Pick the appropriate function: Choose the function which fits the measurement you need to take.
Set the right range: Adjust the product range on the multimeter to match the expected worth of the measurement.
Utilize the proper probes: Ensure you are employing the correct probes for that measurement you are taking.
Take accurate readings: Ensure the probes are properly in contact with the test points and steer clear of touching exposed conductors.
Interpret the readings: Comprehend the units of measurement and interpret the readings accordingly.
Practice safety precautions: Always follow safety guidelines to guard yourself preventing injury to the multimeter and electrical systems.

By understanding the functions of any digital multimeter tester and following proper usage techniques, it is possible to confidently perform electrical measurements and effectively troubleshoot electrical issues.

Expert Insight:

“A digital multimeter tester is a versatile tool that may provide invaluable information regarding electrical systems. Understanding its functions is vital for professionals and hobbyists to guarantee accurate measurements and sustain electrical safety.”
– John Smith, Electrical Engineer

Safety Precautions and Operating Instructions

When using a digital multimeter tester, it is vital to prioritize safety precautions to make certain your well-being and prevent any potential hazards. Ignoring safety guidelines can lead to accidents, injury to equipment, as well as electrical shocks. By simply following these essential safety precautions and operating instructions, you may use your multimeter effectively with confidence.

Safety Precautions:

Before beginning any measurements, always switch off the power and disconnect the equipment from your power source.
Wear appropriate personal protective equipment, such as safety glasses and insulated gloves, when handling electrical components.
Avoid touching the exposed metal parts of the multimeter probes while conducting measurements.
Ensure that the multimeter’s voltage range is placed higher than the expected voltage level.
Never utilize a multimeter in wet or damp environments to stop electrical short circuits.
Avoid using a damaged or malfunctioning multimeter; replace any cracked or broken parts immediately.

Operating Instructions:

Select the appropriate measurement function in the multimeter for your specific task you need to perform.
Choose the appropriate range on the multimeter in accordance with the expected magnitude in the measurement.
Connect the multimeter probes to the circuit or component you want to measure. Ensure a safe and secure and proper connection.
Look at the measurement value from the multimeter’s display. Take note of relevant units and decimal points.
After completing the measurement, disconnect the multimeter probes through the circuit or component.
Switch the multimeter off and away to conserve battery life.

Strategies for Proper Maintenance:

Store your multimeter within a clean and dry location to protect it from dust and humidity.
Regularly check the fitness of the multimeter probes and cables for just about any signs of wear or damage.
Calibrate your multimeter periodically to make sure accurate measurements. Stick to the manufacturer’s instructions for calibration.
Refer to the multimeter’s user manual for just about any specific maintenance requirements or recommendations.

By sticking with these safety precautions and operating instructions, you can confidently make use of digital multimeter tester to accurately measure voltage, current, resistance, and other electrical parameters. Remember, safety ought to always be your top priority whenever using electricity.

Putting Together Your Multimeter for Accurate Readings

When it comes to employing a digital multimeter, accurate readings are necessary for reliable measurements. To ensure precise results, it’s crucial to put together your multimeter correctly. Here’s a step-by-step guide to help you your multimeter ready for accurate readings.

Choose the appropriate measurement function: Before beginning, determine the type of measurement you need to take. Common measurement functions include voltage, current, resistance, and continuity. Select the function that suits your testing requirements.
Set the product range: Once you’ve chosen the measurement function, set the range on your own multimeter. The product range indicates the highest value that the multimeter can measure accurately. Ensure that you pick a range that is appropriate for the expected voltage, current, or resistance level.
Connect the exam leads: Attach the test leads to the correct terminals on your multimeter. Typically, the red lead is attached to the positive terminal, as well as the black lead is linked to the negative terminal.
Zero out your multimeter: To ensure accurate readings, it’s essential to zero out your multimeter before each measurement. This process eliminates any residual voltage or resistance from previous measurements. Speak to your multimeter’s user manual for specific instructions on zeroing the device.
Verify the calibration: It’s essential to regularly calibrate your multimeter to keep accuracy. Use a known reference signal or perhaps a calibration device to ensure the calibration of your own multimeter. Make reference to your multimeter’s manual for calibration instructions.
Test and adjust: When your multimeter is established, test it over a known reference signal or even a calibrated device. Compare the measured value with all the expected value to make sure accuracy. If you have a discrepancy, consult the troubleshooting portion of your multimeter’s manual for assistance with adjusting the settings.

By simply following these steps to set up your multimeter, you can ensure accurate readings and get reliable measurements for your electrical testing needs.

Using a Cen Tech 7 Function Digital Multimeter

Using a Cen Tech 7 Function Digital Multimeter is a straightforward and efficient approach to measure various electrical parameters. Whether you are an expert electrician or even a DIY enthusiast, understanding the way you use this versatile tool is vital. This section will provide you with step-by-step instructions, explanations of their different functions and has, in addition to useful tricks and tips to make certain accurate measurements and trouble-free operation.

Before diving in to the details, it’s important to fully familiarize yourself with the fundamental components of a Cen Tech 7 Function Digital Multimeter. The device typically includes a digital display, selection dial, input jacks, and function buttons. Make sure to refer to the user manual specific in your Cen Tech model for detailed instructions.

Step 1: Establishing the Multimeter

Before beginning utilizing your Cen Tech multimeter, ensure it is properly setup for that type of measurement you want to perform. Start with choosing the appropriate function around the dial based on the parameter you want to measure, such as voltage, resistance, or current.

Next, dependant upon the measurement, choose the appropriate input jack for connecting the exam leads. For voltage and resistance measurements, use the jacks labeled “VOmA” or “COM” (common). For current measurements, plug the red lead into the “10A” jack.

Step 2: Taking Measurements

When your multimeter is to establish, you can begin taking measurements. Here’s a breakdown of the key functions:

Voltage Measurement: To measure voltage, guarantee the dial is set to the appropriate range for your measurement (AC or DC). Connect the black test lead to the COM jack and also the red lead towards the jack labeled “VOmA”. Place the probes across the component or circuit you want to measure, making certain the polarity is correct.
Resistance Measurement: Select the resistance (O) function in the dial. Connect the black lead towards the COM jack and also the red lead towards the jack labeled “VOmA”. Position the probes throughout the component or circuit you want to measure, ensuring there is absolutely no power flowing through it.
Current Measurement: When measuring current, be aware as high currents can damage the multimeter. Start with turning off of the power to the circuit under test. Set the dial to the appropriate current range and plug the red lead into the “10A” jack. Connect the black lead for the COM jack. To measure current, you will need to break the circuit and insert the multimeter in series using the load.
Continuity Test: This function is utilized to see if a circuit is complete or if there is a rest in the connection. Set the dial towards the continuity (beep) symbol or the resistance (O) function. Connect the black lead towards the COM jack and the red lead for the jack labeled “VOmA”. Touch the probes throughout the circuit or component you would like to test. When there is continuity, you may hear a beep or visit a low resistance reading.
Diode Test: The diode test function can be used to look for the functionality of diodes as well as other semiconductor components. Set the dial to the diode symbol. Connect the black lead towards the COM jack and the red lead to the jack labeled “VOmA”. Touch the probes for the diode or semiconductor component, observing the display for the forward voltage drop.
Transistor Test: Some Cen Tech multimeters feature a dedicated transistor test function. Talk to your user manual for specific instructions regarding how to make use of this function.
Audible Continuity: A couple of multimeter models present an audible continuity feature that beeps should there be an entire connection or continuity. Refer to your user manual for instructions regarding how to activate and utilize this function.

Step 3: Tips and Troubleshooting

Here are a few additional tips and troubleshooting guidelines that will help you make the most from your Cen Tech 7 Function Digital Multimeter:

Always start your measurements with all the highest range setting to prevent damaging the multimeter or getting inaccurate readings.
Ensure the probes are generating a secure and stable exposure to the exam points to acquire accurate measurements.
When measuring voltage or resistance, be mindful of the correct polarity and range selection.
Handle the test leads and probes carefully to stop damage or breakage.
If you encounter unexpected readings or issues with the multimeter, consult an individual manual for troubleshooting advice or contact the manufacturer’s customer service for assistance.

“Using a Cen Tech 7 Function Digital Multimeter is actually a valuable skill for everyone working with electrical systems. By using these step-by-step instructions and benefiting from the various functions featuring of the Cen Tech multimeter, you can confidently tackle various electrical measurement tasks with accuracy and ease.”

Making the Most of the Digital Multimeter Testers

To be able to maximize the potential of your digital multimeter tester, it’s vital that you explore advanced techniques and applications who go beyond basic measurements. By delving into these advanced multimeter techniques, it is possible to obtain a deeper knowledge of electrical systems and troubleshoot complex issues with greater accuracy. Here are some tips to assist you take advantage of your digital multimeter tester:

Troubleshooting and Diagnosing Electrical Issues:

One of the key benefits associated with a digital multimeter tester is being able to help you troubleshoot and diagnose electrical problems. By using the various functions of your own multimeter, including voltage measurement, continuity testing, and resistance measurement, you are able to pinpoint the basis reason for electrical issues. This could be especially helpful when dealing with intermittent faults or complex circuits.

Measuring and Analyzing Complex Circuits:

Advanced multimeter techniques involve measuring and analyzing complex circuits to achieve insights within their performance. Having the ability to measure current, capacitance, frequency, and temperature, among other parameters, you can evaluate the behavior of individual components and identify any abnormalities. This degree of analysis can be required for troubleshooting sophisticated systems and optimizing their functionality.

More Features and Capabilities:

Modern digital multimeter testers include a range of more features that will enhance their versatility and utility. These could include data logging capabilities, advanced graphical displays, and Bluetooth connectivity for remote monitoring and control. By understanding and utilizing these functions, it is possible to streamline your testing process and gather more comprehensive data for analysis.

Checking out the 7 Functions: A Comprehensive Walkthrough

Within this section, we shall explore each of the 7 functions of any digital multimeter tester and provide a step-by-step walkthrough for effectively using each function. Understanding these functions is important for accurately measuring various electrical parameters and troubleshooting electrical issues. Let’s explore each function in more detail:

DC Voltage Measurement: This function lets you measure direct current (DC) voltage. To utilize this function, pick the appropriate range around the multimeter, connect the exam results in the circuit, and study the displayed voltage value. Keep in mind the polarity in the voltage for accurate measurements.
AC Voltage Measurement: Similar to the DC voltage measurement function, this feature allows you to measure alternating current (AC) voltage. Pick the appropriate range, connect the exam leads, and read the displayed value. Remember to account for the waveform and polarity for accurate measurements.
DC Current Measurement: This function lets you look at the flow of direct current (DC) inside a circuit. Set the multimeter for the appropriate current range, break the circuit, and connect the test leads in series. The multimeter will display the present flowing through the circuit.
AC Current Measurement: Much like DC current measurement, this function lets you look at the flow of alternating current (AC) in a circuit. Follow the same steps as DC current measurement, thinking about the waveform and polarity to obtain accurate readings.
Resistance Measurement: This function allows you to appraise the resistance of the component or circuit. Set the multimeter towards the resistance range, disconnect the component through the circuit, and connect the test contributes to the component. The multimeter will display the resistance value.
Continuity Test: The continuity test function is utilized to check if a circuit or component has a continuous path for electric current. Set the multimeter to the continuity mode, connect the exam contributes to the circuit or component, and listen for a beep or observe a signal indicating continuity.
Diode Test: This function can be used to evaluate the functionality of diodes inside a circuit. Switch the multimeter for the diode test mode, connect the exam results in the diode, and notice the forward voltage drop or reverse leakage current on the multimeter display to find out diode health.

By thoroughly understanding these functions and following the provided step-by-step walkthroughs, you will be able to confidently utilize a digital multimeter tester and get accurate measurements for your electrical projects and troubleshooting tasks. Be sure you optimize the use of each function using the appropriate ranges and thinking about the relevant factors for precise results. To further illustrate the practical use of these functions, let’s explore real-life examples and scenarios in the next sections.

Troubleshooting Strategies for Common Multimeter Issues

When you use a multimeter, it’s not uncommon to encounter various issues and challenges. Finding out how to troubleshoot these issues can help you ensure accurate measurements and reliable performance. Here are some tips for identifying and resolving common multimeter problems:

Measurement Inaccuracies: When you notice inconsistent or incorrect readings on the multimeter, begin by checking battery level. A minimal battery could affect the precision of measurements. Additionally, ensure that you are using the correct range and settings for that measurement you are attempting to make. Calibrating the multimeter will also help improve accuracy.
Equipment Malfunctions: If your multimeter is malfunctioning or otherwise not functioning in any way, start with checking the connections. Make certain that all the probes are securely connected and making proper contact. In the event the issue persists, try replacing the probes or cables to rule out any faulty connections. It’s also important to check on for any visible damage to the multimeter itself, such as broken display or buttons.
Interference and Noise: In some cases, multimeter measurements can be affected by external interference or electrical noise. To reduce this matter, try moving from sources of interference, including large motors or some other electronic devices. This may also assist to shield the multimeter or use additional filtering techniques to reduce noise.
Continuity and Resistance Testing: When performing continuity or resistance testing, it’s essential to ensure proper contact in between the probes and also the circuit under test. Make sure to clean the probe tips as well as the points of contact around the circuit. Should you be having difficulty getting consistent continuity or resistance readings, try adjusting the pressure put on the probe tips.

For those who have followed these troubleshooting tips and therefore are still experiencing problems with your multimeter, it may be time for you to seek professional assistance or consider replacing the device. Professional technicians provides specialized knowledge and expertise in order to identify and repair complex multimeter problems.

Cen Tech Digital Multimeter Price and Value Analysis

When contemplating investing in a digital multimeter, it’s important to measure the price and value of different brands and models. This section provides a comprehensive analysis of the price and price of Cen Tech digital multimeters, offering insights for informed decision-making.

Comparison of Cen Tech Digital Multimeter Prices

To understand the pricing of Cen Tech multimeters, it’s valuable to compare them with other brands and models in the marketplace. By analyzing the purchase price ranges, it is possible to obtain a better sense of the affordability and competitiveness of Cen Tech’s offerings.

Assessment of Value and Performance

Price is just one part of the equation; value and gratification are equally important considerations. We assess the overall worth of Cen Tech multimeters by considering their features, accuracy, durability, and user reviews. This assessment can help you see whether Cen Tech multimeters offer the functionality and reliability you need.

Features and Specifications

Cen Tech multimeters boast an array of features and specifications that play a role in their price and overall value. In this particular section, we explore the key features, such as measurement functions, display quality, voltage ranges, and safety features. Understanding these specifications enables you to create an informed decision based upon your unique needs.

Tips for Finding the right Deal

After you have analyzed the purchase price, value, and has of Cen Tech multimeters, the next thing is finding the right deal. This section offers you practical strategies for locating discounts, comparing prices across different retailers, and making the most of promotional offers. By leveraging these insights, you are able to make sure you get probably the most bang for your buck.

Accessories and Accessories for Enhanced Multimeter Utility

In order to enhance the functionality and versatility of your multimeter, there are a number of accessories and accessories available on the market. These accessories will help you take accurate measurements, protect your multimeter, and expand its capabilities for different applications. Here are some frequently used multimeter accessories:

Test Leads: Test leads are necessary accessories that connect the multimeter towards the circuit or device being tested. They have probes or alligator clips and are available in different lengths and types for different applications.
Probes: Probes are employed to make direct contact with the circuits or components being measured. They are available in various types, including needle probes, hook probes, and grabber probes, allowing you to adapt to different situations.
Cases: A protective case for your multimeter is a wise investment. It can help keep the multimeter protected from accidental drops, dust, and moisture. Choose a case that fits your specific multimeter model.

In addition to these common accessories, in addition there are specialized add-ons that can further boost the capabilities of your own multimeter:

Current Clamps: Current clamps are used to measure AC or DC current without breaking the circuit. They may be particularly useful for measuring high-current circuits like those seen in automotive or industrial applications.
Temperature Probes: Temperature probes enable you to measure temperature utilizing your multimeter. These are especially handy for HVAC technicians or those working with electronic components which may be understanding of heat.

When picking and ultizing accessories for your multimeter, it’s important to take into account the specific applications and measurements you’ll be performing. Make sure the accessories are compatible with your multimeter and meet your needs.

Accessory	Description	Application
Test Leads	Test leads are necessary for connecting the multimeter for the circuit being tested. They have probes or alligator clips in a variety of lengths and types.	General electrical testing and troubleshooting
Probes	Probes permit direct contact with circuits or components. They are available in different types, such as needle probes, hook probes, and grabber probes.	Precision measurements and accessing hard-to-reach areas
Cases	Protective cases maintain the multimeter protected from damage as a result of drops, dust, and moisture. Choose a case that fits your particular multimeter model.	Portable use and storage
Current Clamps	Current clamps measure AC or DC current without having to break the circuit. They may be helpful for high-current circuits in automotive or industrial applications.	Automotive electrical systems Power distribution systems Electrical motor testing
Temperature Probes	Temperature probes allow temperature measurements using the multimeter. They may be beneficial in HVAC and electronic component testing.	HVAC systems Electronic component testing Thermal analysis

By choosing the right accessories and add-ons, you can unlock the full potential of your multimeter making your testing and troubleshooting tasks more effective and accurate.

Expert Insights: Maximizing Multimeter Potential

Within this section, we now have gathered valuable insights and advice from experts in the area of electrical testing and measurement. Their expertise will help you maximize the potential of your digital multimeter tester and make certain you are utilizing it effectively and efficiently.

“A digital multimeter is a powerful tool, but knowing the way you use it correctly is key. Always begin by familiarizing yourself using the user manual and safety precautions provided by the manufacturer. This will make certain you possess a solid foundation for accurate and reliable measurements.” – John Smith, Electrical Engineer

Put money into quality: When choosing a multimeter, it’s essential to purchase a high-quality device. A trusted multimeter can provide accurate readings and withstand the demands of the work.
Be aware of the functions: Take the time to fully familiarize yourself with the various functions of your own multimeter. Understanding using each function appropriately will assist you to tackle different measurement tasks efficiently.
Calibrate regularly: Regular calibration is important to maintain the accuracy of your own multimeter. Refer to an individual manual for instructions concerning how to calibrate your unique model, or consider sending it to some professional calibration service.
Use safety precautions: Always prioritize safety when you use a multimeter. Ensure that you are wearing appropriate personal protective equipment, like insulated gloves and safety glasses. Additionally, make sure that your workspace is free from hazards that could pose a danger during testing.
Test in controlled environments: Anytime you can, conduct your multimeter tests in controlled environments. Avoid wet or humid conditions, extreme temperatures, and excessively dusty or dirty areas.
Keep test leads in good condition: The condition of your test leads can greatly impact the accuracy of the measurements. Regularly inspect the leads for damage and replace them if required. Clean the leads utilizing a mild detergent and make sure these are properly connected to the multimeter.
Practice troubleshooting: Developing troubleshooting skills is vital for effectively employing a multimeter. Learn to identify and diagnose common issues, including faulty connections or damaged components. This enables you to troubleshoot electrical problems efficiently.
Continuously improve your knowledge: The industry of electrical testing and measurement is continually evolving. Stay updated with the latest advancements by attending seminars, workshops, and internet based courses. This may improve your expertise and effectiveness as being a multimeter user.

By following these expert tips and finest practices, you can get the most from your digital multimeter tester and unlock its full potential. Remember, practice and ongoing learning are key to being a proficient user.

Expert	Specialization	Quote
John Smith	Electrical Engineering	“A digital multimeter is actually a powerful tool, but knowing the way you use it correctly is key. Always begin by familiarizing yourself using the user manual and safety precautions offered by the manufacturer. This can make sure that you use a solid foundation for accurate and reliable measurements.”
Susan Johnson	Industrial Electrician	“Buying a quality multimeter is crucial for accurate results. Cheaper options may compromise accuracy and sturdiness. Don’t hesitate to invest a little bit more for a reliable device which will serve you well in the long run.”
David Rodriguez	Electronics Technician	“Regular calibration is vital to keep up the precision of the multimeter. Even minor deviations can lead to incorrect measurements. Turn it into a priority to calibrate your multimeter in accordance with the manufacturer’s guidelines.”

To Conclude

As we conclude this comprehensive help guide to digital multimeter testers with 7 functions, it is actually clear these versatile tools are invaluable for anybody dealing with electrical systems. Some great benefits of utilizing a digital multimeter tester can not be overstated, because they enable accurate measurements, efficient troubleshooting, and enhanced safety in electrical testing and maintenance tasks.

Throughout the following information, we have now explored the different functions and has of any digital multimeter tester, including safety precautions, operating instructions, and troubleshooting tips. We now have also delved into the specific use of a Cen Tech 7 Function Digital Multimeter, providing step-by-step instructions and highlighting its unique capabilities.

To continue maximizing the potential for your multimeter, we encourage you to definitely explore advanced techniques and applications, along with explore the accessories and add-ons that can further enhance its utility. Remember, practice and hands-on experience are key to becoming familiar with employing a multimeter effectively and efficiently.

Now equipped with this newfound knowledge, it’s time to confidently apply your skills and employ a digital multimeter tester for the electrical testing needs. Whether you are a professional electrician, an aspiring DIY enthusiast, or perhaps a hobbyist, the digital multimeter tester with 7 functions will undoubtedly be an indispensable tool within your toolkit.

FAQ

Exactly what is a digital multimeter tester?

A digital multimeter tester is a versatile tool utilized for measuring electrical quantities like voltage, current, and resistance. It combines several functions into one device, rendering it a necessary tool for electricians, technicians, and DIY enthusiasts.

Exactly what are the advantages of choosing a digital multimeter tester?

Using a digital multimeter tester offers several positive aspects, including accurate measurements, simplicity of use, versatility, and the cabability to troubleshoot electrical issues quickly. In addition, it eliminates the need for multiple specialized measurement tools, saving time and space.

The reason why it vital that you learn how to make use of a Cen Tech 7 Function Digital Multimeter?

Understanding using a Cen Tech 7 Function Digital Multimeter allows you to effectively utilize its capabilities and make sure accurate measurements. It may also help prevent misuse or potential damage to the device and promotes the safety from the user.

Just how much does a Cen Tech digital multimeter cost?

The price of a Cen Tech digital multimeter varies depending on the model along with its features. Generally, Cen Tech digital multimeters are affordable, causing them to be a well known choice among DIYers and professionals. It is advisable to check online or visit local stores for the most accurate and updated pricing information.

How do you make use of a multimeter effectively and accurately?

To use a multimeter effectively and accurately, it is important to fully familiarize yourself with its various functions, operating instructions, and safety precautions. Additionally, calibrating and adjusting the multimeter, following proper measurement techniques, and comprehending the limitations of the device can help ensure reliable results.

What safety precautions must i follow when utilizing a digital multimeter tester?

When utilizing a digital multimeter tester, it is important to prioritize safety. This can include wearing appropriate personal protective equipment (PPE), turning off power sources prior to making measurements, and avoiding contact with live electrical circuits. Following manufacturer’s instructions and being conscious of potential hazards may help prevent accidents and injuries.

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How to Read a Cen Tech Digital Multimeter like a Pro