What is Digital Multimeter?
A digital multimeter (DMM) is a versatile electronic instrument used to measure electrical parameters such as voltage, current, and resistance. It combines the functions of multiple instruments such as a voltmeter, ammeter, and ohmmeter into one device.
The basic components of a digital multimeter include a display, a selector switch, and two probes for measuring the electrical properties of a circuit or component. The probes are connected to the device under test, and the digital multimeter displays the measured values on the screen.
Digital multimeters typically offer a wide range of measurement capabilities, including AC and DC voltage, current, and resistance measurements. Some digital multimeters may also include additional functions, such as capacitance, frequency, and temperature measurements.
Digital multimeters are widely used by electricians, electronics technicians, and hobbyists for testing and troubleshooting electrical circuits and components. They are available in a variety of sizes and types, including handheld and benchtop models, and can be powered by batteries or AC power.
Where DMM is used?
Digital multimeters (DMMs) are used in a wide range of applications and industries that involve electrical and electronic measurements. Some common applications of DMMs include:
- Testing and troubleshooting electronic circuits and devices: DMMs are frequently used to measure voltage, current, and resistance in electronic circuits and devices to diagnose and repair faults.
- Testing and maintaining electrical systems: DMMs are used by electricians and maintenance technicians to measure voltage, current, and resistance in electrical systems to identify faults and perform maintenance tasks.
- Testing and characterizing electronic components: DMMs are used to measure the properties of electronic components such as resistors, capacitors, and diodes to ensure they meet specifications and to select appropriate components for specific applications.
- Automotive diagnostics: DMMs are used by automotive technicians to test the electrical systems of vehicles, including batteries, alternators, and sensors.
- Education and research: DMMs are widely used in educational settings and in scientific research to make precise measurements of electrical properties.
- Quality control and manufacturing: DMMs are used in manufacturing and quality control processes to ensure that electronic products and components meet specifications and standards.
Why DMM needs Calibration?
Digital multimeters (DMMs) are electronic devices that measure electrical quantities with high precision. Over time, factors such as environmental conditions, usage, and wear and tear can cause the accuracy of the DMM's measurements to drift from their initial calibration.
Calibration is the process of adjusting and verifying the accuracy of a DMM's measurements against known standards. Calibration involves comparing the DMM's readings to a reference standard with a known and traceable level of accuracy.
Calibration is important for several reasons:
- To ensure accuracy: A calibrated DMM provides accurate measurements, which are essential for ensuring the safety and reliability of electrical systems and components.
- To comply with standards: Many industries and applications require DMMs to be calibrated at regular intervals to meet regulatory and industry standards.
- To maintain consistency: Calibration helps ensure that measurements taken by different DMMs are consistent and comparable.
- To reduce costs: Accurate measurements can help prevent costly errors and downtime in electrical systems, while regular calibration can help extend the life of the DMM by detecting and correcting issues before they cause significant problems.
In summary, calibration is necessary to ensure that DMMs provide accurate and reliable measurements, comply with industry standards, and reduce the risk of errors and downtime in electrical systems.
List of Digital Multimeter Manufacturers:
There are many manufacturers that produce digital multimeters (DMMs) for use in a variety of industries and applications. Here are some of the most well-known and reputable DMM manufacturers:
- Fluke Corporation
- Keysight Technologies
- Tektronix, Inc.
- Rohde & Schwarz
- Agilent Technologies
- Extech Instruments
- B&K Precision Corporation
- Chauvin Arnoux
- Gossen Metrawatt
- Mastech Group
- Sanwa Electric Instrument Co., Ltd.
These are just a few of the many manufacturers of digital multimeters. It's important to research and compare different models and brands to find the one that best fits your specific needs and budget.
Most popular Digital Multimeter Model:
- Fluke 87V: The Fluke 87V is a high-end DMM that is widely used by electricians, electronics technicians, and other professionals for its accuracy, reliability, and ruggedness. It has a wide range of measurement functions and features, including true RMS AC voltage and current measurement, resistance, continuity, capacitance, frequency, and more.
- Fluke 179: The Fluke 179 is a versatile and rugged DMM that is commonly used by electricians, HVAC technicians, and other professionals for general-purpose electrical measurements. It features true RMS AC voltage and current measurement, resistance, continuity, capacitance, frequency, and more.
- Fluke 117: The Fluke 117 is a compact and easy-to-use DMM that is often used by electricians and other professionals for general-purpose electrical measurements. It features non-contact voltage detection, true RMS AC voltage and current measurement, resistance, continuity, capacitance, frequency, and more.
- Fluke 115: The Fluke 115 is a low-cost and user-friendly DMM that is often used by DIY enthusiasts, hobbyists, and students. It features true RMS AC voltage and current measurement, resistance, continuity, and more.
It's important to note that Fluke offers many other models of DMMs that are popular in various industries and applications. It's always a good idea to research and compare different models and brands to find the one that best fits your specific needs and budget.
Who can Calibrate Digital Multimeter?
Zenith Sales and Calibrations Pty Ltd has state of the art NATA (ISO17025) certified calibration standards and offers smart close loop computerised calibration service in our Sydney and Melbourne Laboratory.
Our Calibration Certificate will satisfy requirements of ISO 9001, ISO 14001, ISO 27001 ISO 45001, ISO 55001 etc.
We also provide on-site Calibration service, where we come to your site or facility.