In the arsenal of any master working with electronic devices, there should be a multimeter for measuring various parameters of devices. Using this device, you can determine the presence of a wire break, measure direct and alternating voltage and current, capacitor parameters and the resistance value of the resistor. Consider the important criteria when choosing a device for use at home and in the car, and also present to your attention the rating of multimeters in terms of functionality.
The multimeter is a versatile device that combines the functions of a voltmeter, ammeter and ohmmeter, thanks to which you can accurately determine the cause of an electrical malfunction in a car or household appliance.
A digital multimeter is necessary for professionals working with power and low-current networks, as well as for masters in the field of electronic devices. The device is based on a double-integration analog-to-digital converter, where the input signal is compared with the standard one. Polarity and overload indication system are detected automatically.
Content
How to choose a multimeter
The choice of a multimeter is based on parameters that are important for further use. In addition to technical specifications, it is recommended to focus on user reviews about specific models. In terms of quality and reliability, manufacturers Fluke, Mastech, APPA, Resanta, CEM are in the leading positions.
Considering the types of multimeters, we can distinguish the following:
- Stationary and mobile. Stationary ones have extended functionality and increased accuracy of results, while mobile ones are suitable if constant transportation is required. So, stationary ones are used for installation in the workshop, and mobile ones can be used in a car, at home or in the country.
- Analog and digital. In analog multimeters, the result is displayed using an arrow on the scale of the device. Devices do not give a very accurate result, but their popularity does not fall due to low cost. The digital multimeter has a large display that shows the measurement result. In addition, digital models usually have a larger set of functions.
In the selection process, you also need to pay attention to the manufacturer, it is better to give preference to well-known brands that have proven themselves in the market.
Important! The error in home multimeters can be within 0.025 - 3%.
Multimeters are divided according to the safety of use into the following types:
- CAT I – for low-voltage networks (electronics, office equipment and household appliances);
- CAT II – for measurements in local networks (loads connected to single-phase sockets);
- CAT III – for power supply networks inside buildings (three-phase power supply, including single-phase lighting lines);
- CAT IV - can be used outside (connection point to a three-phase network, any external lines 0.4 kV).
When choosing, pay attention to the build quality of the case so that the parts are securely fixed and fixed to each other. The shockproof case will help protect the digital multimeter from mechanical impact. High-quality probe wires, high bandwidth and large cross section will help to avoid breaks and chafing. Also pay attention to the length of the wires, the longer they are, the more convenient it will be to work.
Which model is better to buy
To select a quality multimeter for specific applications and tasks, it is necessary to analyze the characteristics of the models offered on the market and real reviews.
If the device is needed for rare use at home, then the simplest analog or digital type multimeter at a low cost will be the best solution. Such a basic device has the necessary characteristics for taking measurements, detecting the integrity of the wires, and measuring the voltage on the battery. From most manufacturers in the lineup, you can find an inexpensive compact multimeter for domestic use with an average level of accuracy.
Professional accurate digital multimeters with extended functionality and increased accuracy are recommended to be purchased by specialists and craftsmen who use multimeters quite often in their work. Professional models often have additional features that you need to familiarize yourself with before buying so as not to overpay for unused options.
Parameters for selecting a multimeter
In the process of choosing for domestic or professional use, you need to pay attention to the technical characteristics and features of the devices:
- Conditions under which the device is intended to be used. Based on the specific application, it is necessary to select a digital multimeter with a suitable degree of protection, for example, against dust and excessive moisture, mechanical impact.
- Power type. Most household appliances are powered by standard 9 V krone batteries, while professional models are equipped with a rechargeable battery.
- Feature set and additional options. It is advisable to choose devices with built-in overload protection, as well as with additional options for comfortable use. For example, the backlight of the display will become indispensable in conditions of limited space without sufficient lighting or the presence of a sound signal when the wires ring. Digital multimeters make it possible to perform a continuity test of diodes to detect burnt ones. Someone will benefit from the HOLD button, which allows you to remember the measured value.
- Complete set and availability of auxiliary elements. For example, current clamps are provided in the kit of devices of some manufacturers, which eliminates the need to purchase them separately. Check the quality and length of wires and probes.
- Degree of error. Professional devices can have an error of up to 0.025%. Devices purchased for domestic use may have an error in the result obtained up to 3%.
- Permissible measurement mode and result range. For home use or for a car, the minimum range will be sufficient, however, in professional instruments, the range of each measurement will be an advantage.
- Convenience of design. Comfort of use, dimensions, features of controls, convenient mode switch.
Given the above selection criteria, you can choose the best device for specific purposes and tasks without overpaying for unnecessary options provided by the manufacturer.
What is the difference between a multimeter and a tester
Many people mistakenly believe that a multimeter and a tester are the same device. However, voltage testers have fewer functions, they have only a few diodes on the panel that provide voltage information. Also, the digital tester has a phase indicator, with which you can determine the integrity of the electrical circuit or the presence of breaks in it.
The multimeter has a lot of other options, and thanks to its advanced functionality, it replaces several devices, including a tester. A multimeter, unlike a tester, can be used with sudden power surges.
Rating of the best multimeters for home and car
Choosing a multimeter for a car or domestic use, you can purchase both budget models and more expensive ones with additional functions if necessary.Let's compare some models, their characteristics, the data was collected in the top models depending on the cost of the device.
Best Inexpensive Devices
When choosing between a pointer and a cheap digital device, it is better to give preference to the second one, because it immediately displays the result on the display. A budget compact multimeter is designed to determine the values \u200b\u200bof current and voltage, and will also help check the integrity of the wiring. Here are the best digital multimeters in this segment:
- Resanta DT 830V - measures direct and alternating current, resistance, tests transistors and diodes. There is a switch for 20 modes, overload protection, power from the crown. The device can be used in everyday life, for a car and in small auto repair shops. The disadvantages are the lack of an auto-shutdown mode and thin probes that are prone to breakage;
- UNI-T UT33D characterized by compactness and lightness, equipped with built-in overload protection. The percentage of error is minimal at high sensitivity, so the multimeter is suitable for home and for radio amateurs. The pluses are the presence of a sound signal and an auto-off function;
- Mastech MAS838: the device will become optimal in terms of price and reliability. The device is ideal for use at home or in the garage, has a minimum error. Equipped with a large screen and clear mode controls. The advantage is the presence of a hold memory button, diode continuity mode.
Rating of multimeters with advanced options
Among the models with additional options, the most popular should be noted:
- Mastech MS8260E. It has modules for testing bipolar transistors, testing diodes and checking the circuit for integrity, measuring the inductance of coils and chokes. The device has a switch for 30 modes, backlight, the presence of the Hold key to fix the last result. The advantages of the device are a wide measurement range, convenient location of the fuse, protection against incorrect connection, high-quality probes. A significant disadvantage is the fact that after the strikes, the battery charge drops to zero;
- CEM DT-61. The device combines basic options with the function of assessing environmental parameters. An extended set of options includes temperature, humidity, noise and light measurements. The device has a double housing with anti-shock characteristics and high-quality wiring. The only drawback with such a set of functions is only the high price.
Recommended professional appliances
Instruments for professional use are distinguished by a shockproof housing with several levels of protection against moisture and dust. Such multimeters provide a wide range and high speed display of the result on a large display:
- Fluke 17B+. The American device is characterized by increased reliability, the display is updated three times per second, the range is adjusted automatically or manually. The advantages of this digital multimeter are informative, smooth turns of the controls, convenient and high-quality probes. Powered by 2 AA batteries;
- APPA 107N – thanks to the IP64 protection class, the device can be used in extreme conditions, and humidity and drops do not affect the measurement accuracy in any way.The last 1600 values are entered into the memory of the device, the device is compatible with computer technology through the interface. The result is displayed not only in numbers and symbols, but also on a linear scale of 42 segments.
So, a multimeter is a device that may be needed not only by electricians and electrical workers, but also by ordinary craftsmen for domestic use in a garage or at home. The device will help to establish the causes of breakdowns, since it allows you to carry out various measurements due to its versatility.
Similar articles:
