Instructions for using the dt 838 multimeter. Digital Multimeter - instructions and operating instructions
A multimeter is a very useful device that will allow both novice and experienced electricians to quickly check the voltage in the network, the performance of an electrical appliance, and even the current strength in the circuit. In fact, working with this type of tester is not at all difficult; the main thing is to remember the correct connection of the probes, as well as the purpose of all the ranges indicated on the front panel. Next, we will provide detailed instructions for dummies on how to use a multimeter at home!
Meet the tester
First of all, we will briefly tell you what is on the front panel of the measuring device and what functions you can use when working with the tester, after which we will tell you how to measure resistance, current and voltage in the network. So, on the front side of the digital multimeter there are the following symbols:
- OFF – tester is turned off;
- ACV – alternating voltage;
- DCV – constant voltage;
- DCA – direct current;
- Ω - resistance;
You can clearly see the front appearance of the electronic tester in the photo:
You probably immediately noticed the 3 connectors for connecting probes? So here we need to immediately warn you that it is necessary to correctly connect the tentacles to the tester before taking measurements. The black wire is always connected to the output labeled COM. Red according to the situation: in order to check the voltage in the network, current up to 200 mA or resistance, you must use the “VΩmA” output; if you need to measure the current value above 200 mA, be sure to insert the red probe into the socket marked “10 ADC”. If you do not take this requirement into account and use the “VΩmA” connector to measure large currents, the multimeter will quickly fail because The fuse will blow!
There are also old-style devices - analog or, as they are commonly called, dial multimeters. The model with an arrow is practically no longer used, because such a scale has a higher error and, moreover, measuring voltage, resistance and current using a dial indicator is less convenient. 
If you are interested in how to use a dial multimeter at home, we immediately recommend watching a visual video lesson:
Learning to work with an analog model
We will talk in more detail later about how to use a more modern digital model of the tester, looking at step-by-step instructions in pictures.
Measuring voltage
To measure the voltage in the circuit yourself, you must first move the switch to the desired position. In a network with alternating voltage (for example, in a socket), the switch arrow should be in the ACV position. The probes must be connected to the COM and “VΩmA” sockets. Next, select the approximate network voltage range. If difficulties arise at this stage, it is better to set the switch to the highest value - for example, 750 Volts. Next, if the display shows a lower voltage, you can move the switch to a lower level: 200 or 50 Volts. Thus, by reducing the setpoint to a more suitable one, you can determine the most accurate value. In a constant voltage network, you need to use a multimeter in the same way. Usually, in the latter case, it is best to set the switch to 20 Volts (for example, when repairing car electrical systems).
A very important nuance that you should know about is that you need to connect the tentacles to the chain in parallel, as shown in the picture: 
We measure the current strength
In order to independently measure the current strength in a circuit with a multimeter, you must first decide whether direct or alternating current flows through the wires. After this, you need to find out the approximate value in Amperes in order to select the appropriate socket for connecting the black probe - “VΩmA” or “10 A”. We recommend that you initially insert the probe into the connector with a higher current value and if a lower value is displayed on the display, switch the plug to another socket. If again you see that the measured value is less than the setting, you need to use a range with a lower value in Amperes. 
Please note that if you decide to use a multimeter as an ammeter, you need to connect the tester to the circuit in series, as shown in the picture: 
Measuring resistance
Well, the safest thing in relation to the safety of the multimeter is to use a device to measure the resistance of circuit elements. In this case, you can set the switch to any range of the “Ω” sector, and then select the appropriate setting for more accurate measurements. A very important point - before using the device to measure resistance, be sure to turn off the power in the circuit, even if it is a regular battery. Otherwise, your tester in ohmmeter mode may show an incorrect value. 
Most often, you have to measure resistance with a multimeter yourself. For example, if, you can measure the resistance of the heating element, which most likely has failed.
By the way, if, when measuring the resistance on a section of the circuit with a multimeter, you saw the value “1”, “OL” or “OVER” on the display, then you need to move the switch to a higher range, because at the setting you select, an overload occurs. At the same time, if “0” is displayed on the dial, move the tester to a smaller measurement range. Remember this point and using a multimeter when measuring resistance will not be difficult!
We use dialing
If you look closely at the front panel of the tester, you can see several additional functions that we have not yet talked about. Some of them are used only by experienced radio technicians, so there is no point in telling a home electrician about them (they are unlikely to be useful in everyday use anyway). But there is another important tester mode that you may use - dialing (we have indicated its designation in the picture below). For example, to find in a circuit, you need to ring the electrical wiring, and if the circuit is closed, you will hear a sound indication. To do this, you just need to connect the probes to the required 2 points of the circuit. 
Again, a very important nuance - the power on the section of the circuit that you are going to call must be turned off. For example, if you decide
The small-sized measuring multimeter DT 838 is a multifunctional device. At the moment, the DT 838 digital measuring multimeter is the most affordable and widespread. It is used not only by professionals, but also by amateurs both in our country and in many countries around the world.
It gained its popularity due to its low cost, reliability, ease of operation, convenience and small size. All these digital devices are manufactured at numerous industrial electrical factories in China, under different brands.
These brands are unique to different regions of our planet, but all models have the same internal structure and differ only in workmanship and equipment. When buying a DT 838 multimeter, the instructions that come with it will come in handy.
By the way, it fits such popular models as M-830B and DT 832.
The question often arises about how to use the DT 838 multimeter. This is mainly asked by people who first purchased this miracle of Chinese industry. There is nothing complicated here. The range switch is set to the desired mode by turning it in the desired direction. Moreover, it can be turned in different directions, clockwise or counterclockwise. The probes are installed as follows. One is always in the COM hole, this is a minus for direct current (although the device is not polarity sensitive and will show a minus sign if the polarity is incorrect). The second into the VΩmA hole for all modes except current measurement.
To measure current, you need to move the second probe into the third hole marked 10ADC and switch to the appropriate current measurement mode. Digital multimeter DT 838 instructions allows you to use it at 100 percent. It also describes in detail all the steps for carrying out various measurements (and the instructions usually mention models M-830B, DT 832, DT 838). All characteristics of the device are also indicated there (see Table 1); some manufacturers may indicate in this document the circuit diagram of the DT 838 multimeter. As practice shows, this equipment is very reliable in operation.
Its only significant drawback for professionals is its low measurement accuracy. Although for domestic needs this is quite enough. At home, such a device allows you to ring wires, semiconductor diodes, measure the presence of voltage and current, check transistors, high-capacity capacitors, measure resistance and temperature.
In addition to measuring direct voltage (DCV), current (DCA), alternating voltage (ACV), this measuring device allows you to measure the resistance of DC resistors, the static transfer coefficient of the base current (though only low-power semiconductor transistors (hFE)) and measure temperature (TEMPoC) (this requires a special sensor, which can be included in the kit or sold separately).
A 3.5-digit liquid crystal display is used to display measurement results. The device can automatically determine polarity when measuring voltage and current. Three to four measurements take place in one second, of which the average is calculated and displayed on the indicator. This small-sized digital device operates in a temperature range from 0 to 40 C. It is powered by a Soviet Krona battery (9 V). All measurement limits of the Resanta DT 838 multimeter are protected from overloads.
This equipment is based on the principle of double integration of a microcircuit of the ICL7106 type (this is an analog-to-digital converter). The ICL7106 type microcircuit is similar to our domestic K572PV5 microcircuit. Such an analog-to-digital converter includes differential inputs that are used for the input signal and for a reference voltage reference.
This design of the microcircuit allows you to measure voltage without being tied to the power source of the microcircuit itself, which eliminates common-mode interference both in signal circuits and in the reference voltage circuit. You can read about the detailed internal structure and possible applications of this type of microcircuit on the Internet.
The DT 838 multimeter is manufactured according to classical circuits for the type of analog-to-digital converter used, with precise resistor dividers for all measuring modes. If the device fails, it is recommended not to repair the device, but to buy a new one, since it is quite cheap.
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How to use a multimeter or in other words, how to use a voltage tester? Quite often, such questions are asked by those who purchased this product for home use, but even the operating instructions for teapots did not provide any results. Details below.
Types of Voltage Testers
How to check the resistance and test the wires? To do this, you should use a device called a voltmeter. The device helps to determine the necessary parameters on all electrical devices.
Products come in a wide variety of models, in particular:
- DT9208A, 830;
- XL830L, VC61A, A830L;
- MAS830L, 830B, 830V, MAS838;
- DT830B, DT9205A, DT9208A, DT890B, DT838L, DT830D, DT9205A;
- M832, M838, M890G, M83, 110A, M830, 81780, M266C, MS8230B, 700B;
- DT9502A, 890V;
- Ts4353, Ts4324, M182;
- M830B, M832, DT9207A, UT30D, DT700D, 360TRN;
- DT700C, 9205A, M830BZ, EAC3TO;
- DT890V, M838, MD832, DT9202A, DT850L, MD830B;
- VC9205N, 830D, Ts4317, MAS830, Ts4317M 43101, 831B;
- DT858L, MAS830B 59002, M833, M57D, Ts4342;
- DT33C, M890C, DT700B.
These mini measuring devices can measure current, voltage, and resistance. In addition, using a multi device, you can connect or, in other words, assemble a power circuit or identify faults in it. In practice, the device is excellent for those who work directly with radio devices and need to check diodes to determine their functionality.
Testing with this device can only be carried out on devices that have an electrical circuit, in particular transistors or parts for radios, a voltage divider, LAN and USB contactors, and a rotor vibration ring.
If we consider a more expensive network meter, then it will be able to check many other electrical devices, as it is equipped with a number of additional functions. In particular, it is possible to examine capacitance, temperature, inductance and everything else that electrical equipment may have.
It is worth noting that multitesters are used for diagnostics by both experienced professionals and simply amateurs, who know how to use them only in theory. There are many instructions with detailed descriptions, there are pictures on how to work correctly and measure amperes, but it is important to remember that each device has its own characteristics, both in functioning and in operation.
How to use the tester correctly
To use a multi-tester, you need to prepare probes that touch the wires. To remove the probes, you need to pay attention to the connectors on the side, which will allow you not only to start using the autotester, but to properly prepare it for use. What products can be tested with an electrical tester?
The most important thing is that the device is electric, and in general, regardless of what it is intended for, for example:
- Resanta welding machine;
- Battery voltage;
- Sound system in the car;
- Tablet;
- Acne squeezer;
- A light bulb;
- Battery;
- Keygenerator, if it burns out;
- Vibrating bullet;
- Extension;
- Amperage in the socket;
- Electric kettle;
- Wiring in the car;
- Resistor serviceability;
- Monitor cable;
- An electronic device called a vinaigrette;
- If, when working with the multistyler, it starts to give an electric shock.
The most important thing is that when testing or measuring with a digital multimeter, it is necessary that the work be carried out as carefully as possible, namely, it is strictly forbidden to touch the bare probes. First, it is better to read the rules and learn how to use this device with your own hands to avoid problems. For example, that there will be an incorrect connection and, accordingly, there will be incorrect readings.
Features of the DT 838 multimeter
A voltammeter can be of various types, configurations and functionality. The multifunctional marking device 838 is in great demand, the operating instructions for which are in Russian, and it will not be difficult to figure out its operating principle even for beginners.
Product:
- Easy to use;
- Cheap;
- Lung;
- Compact.
The device is used almost everywhere, and it measures indicators in various modes, and the device is in demand all over the world. Why choose it when repairs are needed and is it suitable for beginners (option with a tank)?
The device is Chinese, and it helps to quickly find an open circuit, even if you do not have any special skills or special education.
To set up the device and understand the values it produces, it is enough to review the device and its operating instructions. In general, this will require setting the range switch to the desired mode by turning it in the desired direction. Rotation can occur clockwise or counterclockwise. As for probes similar in shape to a torus, they are installed in a hole with a minus to detect direct current. The second probe is placed in the hole to measure the current. The device is also suitable for measuring alternating current.
Options for checking resistance with a multimeter
You should turn on and measure the designation of the parameters and the required values with an ammeter (tseshka), but the main thing is to know how the symbolism is indicated, for which you need to pay attention to the icon that appears on the screen, and the decoding is in the instructions, which fully describe the use of the device and what it is in in general.
The device can be used to check:
- Integrity of electrical wiring;
- Serviceability of the winding on the electric motor;
- Serviceability of radio components with a fixed resistance;
- Transformer and its power supply;
- Grounding resistance.
Electrics is not as simple as it might seem at first glance, and to learn how to work with it, it is not enough to watch a video; however, to measure the various forces of electricity, you can use a conventional multimeter.
Ways to test wires with a multimeter
Each multimeter has its own specific characteristics, but the operating principle is similar. The universal device can be used both at home and for professionals who work directly with electricity. How to ring a device using a multimeter? It’s worth taking an apartment in an ordinary multi-story building as an example.
Electrical equipment is in such a room in every room, just like:
- Sockets;
- Wiring;
- Switches.
All electrical circuits are connected to a panel in which an electric meter is installed. Often, a room equipped with electrical appliances may go out, and this happens due to a breakdown in it, but the lights turn off throughout the entire apartment. What to do in such a situation?
You need to connect an analog dial multimeter and literally measure every device that can cause interruptions.
If the multitwitch beeps when connected to a certain device, then it is quite possible that the problem lies with it. You can directly connect to the panel and immediately check in general whether there are faults in the wiring or whether it is simply a breakdown of the electrical appliance. The scale on the ammeter will show all the data received, but do not forget about such a moment as error. It is the scale that shows the frequency or voltage, depending on what exactly is being measured, and to determine the readings, just look at the operating instructions.
Brief operating instructions for the DT 830B multimeter
The circuit diagram and voltage of each device can be different, just like the connection cable, and therefore before using an ohmmeter and measuring the load in the network, it is worth paying attention to the features of the object under study and the multimeter itself. Using such devices, you can measure volts, milliamps, watts, and detect such moments as phase and minus in a socket, ohms. It is worth noting that there are a huge variety of devices for measuring all these quantities.
In particular:
- M830v Digital;
- Ermak;
- Digital;
- Multimeter;
- Sunwa;
- Vorel;
- Sunma;
- Mastech;
- Multifox;
- 5808;
- Dcma;
- Digital;
- Universal;
- Passwdfinder;
- Atlantic.
For those who constantly work with electrical devices, it is simply impossible to do without a multimeter, especially one like the 830 model. The principle of operation will be clear even to a beginner, and the features of the device are reliability, accuracy, ease of use, versatility, excellent quality, and optimal cost. Let's learn how to use the device if you are not a master.
With this equipment, you can carry out wiring testing in any room, regardless of whether it is residential or not.
With its help, you can ring the board in the charger and even simply examine the light bulb for serviceability. Some people believe that the functions of a multimeter are significantly limited, however, this is not at all the case. Even if you use Gravitex, Visiograph, or a cable welding machine that has stopped working, then a multimeter is what you need. The most important thing is that the device is not just serviceable, but correctly functioning and configured, since otherwise incorrect readings will be received and this will affect the repair.
Instructions for use and how to measure current with a multimeter
Why doesn't the thermocouple device work? How to fix it if the problem is the current? To do this, you need to use a multimeter that can cope with examining even the most ordinary lamp.
For current measurements you need:
- Connecting the device to the product under test using probes.
- If the indicator does not light up upon contact, this indicates a malfunction of the equipment.
- There is an option to reduce the measurement limit by 1 unit and re-diagnosis.
The measurement should be carried out briefly in order to get it as accurate as possible, and it is also worth remembering that even a non-working device can show the current strength, but very small, especially if a low-power device is being diagnosed.
It only takes a couple of seconds to measure.
Regardless of whether the voltage and current are high or low, taking measurements is not too difficult and sometimes, if the device is being used for the first time, it is enough to simply follow the instructions.
Features of the DT 832 multimeter
In the instruction manual you can find many meanings. For example, Dcv, Acv, Dca, 181, 1000a, 182. To find out what it is, just carefully study the instructions for the multimeter, regardless of which model it is 832 or 831. Reviews about both devices are only positive, and many call them universal devices that are suitable for both masters and beginners.
The peculiarity of the equipment is that they include several functions of such units as:
- Voltmeters;
- Ohmmeters;
- Ammeters.
Every home handyman should know what a multimeter is and how to operate it, which will eliminate the need to contact specialists, whose visit to the address costs quite a lot. The most important thing is to strictly follow the instructions when working, since if there is even a minimal error, it is quite possible to carry out maintenance and repair of electrical equipment incorrectly.
As for additional features, it can be noted that the multimeter model 832:
- Reliable;
- Cheap;
- Easy to use;
- Compact in size;
- Does not require maintenance or repair;
- It has only positive reviews from users.
The devices are designed for testing the power circuit, studying alarms, monitoring the health of a semiconductor, measuring the gain in a transistor, and more. It’s not difficult to figure out how it works, but if it starts showing incorrect values, then you need to replace the device. How to identify them?
When examining any electrical device, you must follow its instruction manual.
This will allow you to compare the data obtained and what it should actually be. If the similarity is obvious, then the device is working properly, and you can understand whether the equipment is broken or not.
Rules: how to use a multimeter
When working with multimeters, you should pay attention to a number of precautions that will prevent electric shocks and more serious consequences.
When taking measurements, it is strictly forbidden to work in an environment with high humidity, measure the measurement mode if diagnostics of the device has already begun, measure parameters that may exceed the upper limit of the multimeter, use faulty equipment, measure electrical equipment if it is connected to the network.
How to use a multimeter for dummies (video)
Having your own multimeter at home is not bad, however, if you do not have the skills to work with electrical devices, then it is better to entrust the process to real professionals who can thoroughly diagnose the device and provide only the correct result, which is important for repair and maintenance.
- a combined electrical measuring device that serves to perform a number of different functions. In Russia, a multimeter used to be called an avometer, which, in turn, is an abbreviation for Ampere-Volt-Ohm meter (AVOmeter). The functions of these devices were previously performed by a multimeter (avometer). These days, in addition to the functions already mentioned, a multimeter is capable of solving many other different tasks.
A multimeter can be portable (in most cases, such a multimeter is used for basic measurements and troubleshooting), or a complex stationary device with many capabilities.
Our catalog presents the most popular models multimeters, which are intended for measuring voltage, current, resistance, capacitance, checking diodes, transistors, audio continuity:
All multimeters These models have common functions:
3.5 digit LCD display (1999 numbers with automatic detection of polarity and units of measurement)
Low battery indicator
Overload protection
Differences between multimeters presented in our assortment
Multimeters DT 830 / DT 831 / DT 832 / DT 838 are designed to measure:
Constant voltage: 200mV/2/20/200V/1000V
AC voltage: 200/750V;
DC current: 200uA/20mA, 200mA, 10A
Resistance: 200Ω/2KΩ/20KΩ/200KΩ, 2MΩ
Transistor gain, except DT-831
Diode checks,
Connection calls, except DT-830C
Temperatures only DT-838
Meander feeds with a frequency of 50Hz only DT-832
It also provides an indication of battery discharge "BAT" and overload at input "1".
Displays on a 31/2 bit LCD display (maximum displayed number is 1999). Rotary switch with 19 positions for selecting function and measuring range
DT-838 includes a K-type thermocouple.
Multimeters DT890В+/ M890C+/ M890D / M890F are designed to measure:
Constant voltage: 200mV/2/20/200V/1000V;
AC voltage: 200mV/2/20/200V/1000V;
DC and AC current: 2mA/20mA/200mA/10A
Resistances: 0.1 ohm to 200 megohm
Transistor test at a fixed base current of 100 µA
Capacitor capacities from 1 pF to 20 µF
Diode test at a fixed current of 1 mA,
Connection dialing
Temperatures with and without thermocouple ( only M890C+)
Frequencies 2KHz/20KHz M890F only
Key Features
Provides indication of battery discharge "BAT" and overload at input "1".
Displays on LCD 1999, update 2-3 times/sec
ADC measurement method with double integration.
Rotary switch with 32 positions for selecting function and measuring range
High sensitivity (100µV)
Automatic polarity indication
Automatic overload indication with "1" symbol
Protection on all measuring ranges
The set includes: instructions, a set of probes, a 9V Krona battery. Included in the set M890C+ includes a K-type thermocouple.
Multimeter functions
A multimeter is a universal measuring device that combines the functions of an ammeter, ohmmeter and voltmeter. A small device allows you to:
1) Measure resistance, voltage and direct and alternating current;
2) Measure frequency;
3) Check the capacitance of the capacitors;
4) Check the inductance of the coils;
5) Check the serviceability of diodes and transistors;
6) Determine the level of noise and illumination that comes from certain devices;
7) Identify network breaks and damaged connections.
Principle of operation:
The multimeter works with two probes, the bare tips of which touch contacts, sockets, switches, wires, etc. to obtain electrical measurements. After connecting the probes, you must use the switch to set it to the required position corresponding to the type and limit of measurement.
The choice of a multimeter depends on the specifics of further work with the device. All multimeters, depending on the scope and capabilities, are divided into several categories:CAT I
Such multimeters are used for devices that are battery-powered or have a built-in transformer for galvanic isolation. Example of use: repairing flashlights, transistor radios, stereo systems, etc.
CAT II
Such multimers are used for devices operating from the mains. Usage example: household appliances and power tools, etc.
CAT III
Such multimers are used when working with electricity indoors and when installing and repairing large and fixed equipment. Example of use: sockets, distribution networks.
CAT IV
Such multimers are used when installing low-voltage equipment. Application example: measurement on main fuses.
Each multimeter consists of a display (analog - measuring scale), a multi-position switch, and sockets for connecting cords with probes.
The position of the switch selects the operating mode of the device:
OFF - the device is turned off (some devices have a special button for this);
ACV - alternating voltage measurement;
DCV - DC voltage measurement;
ACA - alternating current measurement;
DCA - direct current measurement;
- Ω - resistance measurement;
HFE - measurement of transistor parameters.
23.09.2012
Do you need instructions (manual) for using a digital multimeter (they are also called testers)? If yes, then you have come to the right place! We will write using an example multimeter DT-838 Digital Multimeter, but it will also be useful to owners of other devices of the same series.
- DT-830B
- DT-832
- DT9205A
Before using the device, be sure to carefully read the manual, this will help to avoid problems both with the measuring device itself and with other equipment. Before I tell you, how to use a multimeter, we will give brief answers to frequently asked questions:
How to test a capacitor with a multimeter? Select the “resistance measurement” position at maximum sensitivity. We connect the contacts and touch the capacitor with them. We change the polarity. In both cases the resistance must be infinitely large. If this is not the case, the capacitor is broken. Note: if the electrolytic capacitor (jar) is swollen, it is not suitable for use.
What is DC V and AC V? DC - Direct Current (direct current), AC - Alternating Current (alternating current). These switch positions on the device are needed to measure DC and AC current, respectively.
How to test a transistor with a multimeter We select the position for measuring resistance in kilo-ohms, in the example in the picture above - this is 2000 Ohms, there is also a diode drawn there. And we touch the ends of the diode, 2 times with different polarities. With one polarity there should be infinite resistance, with the other - finite, and there is conductivity. If it runs in both directions, it is broken. If it doesn’t work at all, it means it’s also out of order. Either you are measuring incorrectly.
How to use a digital multimeter
Now, thanks to the operating instructions for the digital multimeter we have posted, we know how to change current, voltage, resistance and other physical quantities using this device. We also recommend watching this useful video:
Tags: electronics