HELPFUL TIPS ON BUYING YOUR NEXT DIGITAL MULTIMETER
Dated:27/6/2019
Here are the following items before you buy one:
1. General usage: Consider if the digital multimeter is to be used for home/hobby use. If so, it is unlikely to need the same level of robustness and reliability as one used for industrial or professional use. There is a considerable difference between the cost of the entry levels meters and those used for professional use.
2. Amps, Volts and Ohms: All digital multimeters will be able to offer the basic measurements of amps volts and ohms. These are the basic measurements that are included in any multimeter that you will want to buy.
3. Additional ranges: Today, digital multimeters are able to provide a number of ranges beyond the basic Amps, Volts and Ohms. Ranges may include a buzzer for continuity, temperature, capacitance, diode and transistor measurements, as well as frequency and several other measurements. As different DMMs will offer different capabilities, it is necessary to consider what might be needed when buying a digital multimeter.
4. True RMS: Many digital multimeters only provide an average reading of an AC waveform that may be calibrated as RMS. This will not provide an accurate reading of the waveform differs from a sine wave. If a true RMS reading is needed, this should be checked so that the correct digital multimeter is bought. Typically DMMs that are able to provide true RMS readings are more costly than those that do not. If this is required then check that it says ‘True RMS’ and not just RMS.
5. Accuracy and Resolution: Accuracy and resolution are two key aspects associated with any digital test instrument. When choosing a digital multimeter it is necessary to distinguish between the two aspects and determine whether the performance is adequate.
6. Autoranging: One useful facility that is available, typically on higher-end digital multimeters is the auto range facility. It is worth considering whether it is a requirement when buying a digital multimeter. Using this it is only necessary to select whether volts, amps, ohms, etc are being measured. The meter will detect the level of the measurement and select the required range. This is particularly useful for applications like field service where it may not be convenient to keep selecting a range to obtain the optimum reading.
7. Safety Ratings: When measuring voltages, particularly on electrical installations it is necessary to ensure that the digital multimeter has an adequate safety rating. IEC 1010 categorises meters according to their safety ratings. These not only take into account the working voltage, but also the resilience to peak transients that often occur on the lines. It is necessary to ensure that any meter being used for these applications is suitably rated. This may result in needing to buy a more expensive meter.
We got an array of DMM brands tools just call our stores: Al Dhafra Electronics Co. Muroor Branch (02-6347590) and Mirpur Electrical Appliances Trading (02-5546151). Please do navigate our official website and follow this link here - http://tct.brawaa.com/hm/al-dhafra/home for more key products.
