Several metrological functions are popular with DIYers. Household multimeters allow you to evaluate the characteristics of an electrical circuit, including determining voltage, resistance and amperage. In the circles of radio amateurs, such devices are also in demand, since they are used to check the state of transistors and diodes. Inexpensive multimeter DT-830B is provided with all of the above functions, and it makes measurements with high accuracy. In any case, if we compare it with other representatives of the class, which sometimes do not suit even amateur radio amateurs.
General information about the device
The multifunctional tester of the DT-830B series is positioned as an affordable, understandable and versatile tool for determining various electrical parameters. The model is optimized for work at home, but this did not prevent it from acquiring the features of a professional multimeter as well. This is hinted at by the presence of measuring probes in the kit, a wide range of indicators and means for self-diagnosis. The digital multimeter DT-830B is powered by 9V Krona sources. In particular, the domestic manufacturer "Resant" includes one battery of this format in the kit. The model belongs to the budget class, so its cost is low. On the market, you can find a modification at a price of about 200-300 rubles.
Device appearance
The device continues the series of traditional analog testers, which allowed users to record voltage and current readings with varying degrees of accuracy. The differences of this device include a digital way of presenting data and the ability to work with several parameters. These features just determined the form factor and the nature of the implementation of the control elements of the device. The filling is reliably and compactly enclosed in a small case, on the surface of which the switch takes the central place. Ordinary users describe the DT-830B multimeter to such characteristics as portability, ergonomics and productivity. Actually, a massive 20-position knob for switching modes with parameters, although it is a somewhat outdated element in the equipment of digital testers, it is thanks to its function that the comfort of physical handling is achieved. Around the switch are icons indicating the modes of operation, which also adds convenience, especially for inexperienced users. The digital screen is realized at the expense of a liquid crystal panel, on which information about the current measured parameter is promptly displayed.
Main characteristics
Household electrical meters are often provided with wide functionality, but they are inferior to professional equipment in accuracy and durability. As mentioned above, the DT-830B multimeter, due to its high sensitivity, demonstrates good accuracy indicators, but in other technical and operational qualities it is slightly inferior to more solid testers. This is evidenced by the official characteristics of the device, presented below:
- Constant current strength - 10 A.
- Constant voltage - 1 kW.
- AC voltage - range from 200 to 750 W.
- Digit capacity of the LCD display - 3.5.
- The limit of resistance force measurement is 200 kOhm.
- Temperature range allowed for operation is from 0 to 40 ° С.
- Dimensions - 126 x 28 x 70 mm.
- The weight of the device is 137 g.
This device still differs from professional models in limited functionality. Many users, for example, point out that there is no verification option. But, in comparison with other household testers, the DT-830B multimeter is already positively distinguished by the presence of so-called alarm indicators, a diode tester and an extended measurement scale.
Instructions for use
Working manipulations with the device are carried out using the aforementioned complete probes, for which the corresponding sockets are provided. These are metal rods with insulated handles that are designed to create contact between the tester and the medium under test, in particular the conductor. Depending on the desired indicator, the probe is inserted into one of three connectors. For example, the COM jack can act as a negative connector, grounded and common - again, depending on the mode in which the DT-830B multimeter operates. A detailed instruction gives the possibilities of using the other two sockets. If you need to measure resistance or voltages, then a connector labeled VΩmA will do. Most of the modifications of this multimeter work with this section of the probe integration and to determine the current strength up to 200 mA. If you want to measure the current strength over 200 mA, then you need to use the 10ADC socket. After making a contact with the set operating mode, the device display will show information about the required parameter.
Modes of operation
The information panel of the device is divided into sectors and around the switch. Each section determines the mode of operation of the multimeter, and in some cases also allows you to more accurately indicate the measurement ranges. This is especially true for DCV and DCA modes. In the first case, the user can measure the DC voltage in the voltmeter mode, and in the second, use an ammeter, which will help to directly determine the DC current value. The sector for assessing the state of diodes, with which the DT-830B multimeter also works, deserves special attention. How to use the device in this mode? Measuring probes are installed in the VQmA and COM connectors, and the switch is located on the sector with the operating mode for diodes. Further, with the tips - by direct contact - the resistance is measured. It is important to consider the nature of the voltage drop here. The element is faulty if the resistance when measured in the reverse and forward directions is the same.
Maintenance instructions
The developers position the tester as wear-resistant, but the duration of its effective operation will still depend on the frequency of preventive measures. After each measurement, the device is cleaned of dirt and dust if the work was carried out in a construction site or workshop. To maintain measurement accuracy, the DT-830B multimeter should be diagnosed regularly. The operating instructions for the model also indicate problems with its operation in conditions of high humidity with a coefficient of about 75%. Firstly, under such conditions, the measurement accuracy is noticeably reduced, and secondly, there is a risk of failure of the sensitive elements of the electrical filling.
Transportation and storage rules
The device can be transported by any type of transport, having previously ensured its physical safety. The tester should not be subjected to mechanical shock, sudden pressure drops or extreme temperatures. More stringent requirements are imposed on the conditions in which the DT-830B multimeter is supposed to be kept for a long time. The instruction indicates that the device may only be stored in a heated room with effective ventilation. Moreover, the air temperature should be in the range from 0 to 40 ° C. And especially, storage conditions should be avoided where there is a risk of contact of the multimeter with dust, acids and alkalis, which contribute to corrosion processes.
Positive reviews
The device is praised for its wide range of positive qualities. As a rule, there is a combination of high precision and versatility. The creators endowed the device with a rich option, but at the same time they managed to maintain a sufficient level of measurement accuracy. The users themselves testify that the tester demonstrates an accuracy of about 0.5% in terms of the set of operating parameters. Experts point out that the DT-830B multimeter can be configured to work with more reliable indicators, but for household models of this class this does not make much sense.
Negative reviews
Despite the generous bundle, it is not the strong point of the device. Experienced users recommend not even starting to use the probes, since they have very thin veins that can fail at a crucial moment. The owners also note another drawback. Due to the lack of a fuse, repair of the DT-830B multimeter may be required even in normal operation. The absence of buzzer and safety indicators leads to the fact that the user is not aware of the excess loads and thereby endangers the electrical stuffing. But this applies to the latest modifications of the device, which are produced according to simplified schemes. By the way, the low price tag of the tester is caused by the transition to a new concept of models with limited protective functions.
Conclusion
For a home radio amateur, the device is more than suitable. It is quite suitable for working with typical electrical appliances and network parameters. Therefore, in terms of operational capabilities, this decision is fully justified. Only the reliability indicators can be questioned. But such shortcomings can be corrected with experience. In particular, the masters recommend modifying the DT-830B multimeter with their own hands, providing it with the same fuses and the latest transistors. The upgrade will be inexpensive, but the device will significantly add to the durability. Another thing is that one should invade the base of the device only with an understanding of the device and principles of operation of a modern multimeter, otherwise there is a risk of minimizing the existing indicators of reliability and accuracy.
