Download wiring diagram of the dt 182 multimeter

A multimeter is a tool used to test AC or DC voltage, resistance, or current continuity in a circuit. Consider 3 ways to use a multimeter for dummies to find out if there is current in the local electrical network.

The structure of the multimeter

Before starting work, it is necessary to study the components of the device, because instructions are far from always attached, we have prepared a description of them:

Dial: Has an arched scale visible through a glass or plastic display. A pointer on the display shows the scale values. If you are a digital multimeter (mastech mas838, ms8230b, m890d, dt700d, dt 9202a, 59002, mas830, my64), then its dial will be replaced by an ice display.
Pointer or arrow: This is a thin black needle at the leftmost position in the dial window, designed to read measured data on dial gauges - yx 360trn, pmm 600, sunwa yx 1000a, m83. Before using a pointer multimeter, be sure to read the instructions, especially the section "division values".
Switch or button: Allows you to change the functions (voltmeter, ammeter, ohmmeter) and scale (x1, x10, etc.) of the meter. Many functions have multiple ranges, as with touch switches. It is important to have a complete set of operating modes. Most meters use this type of pen as shown in the picture, but there are others. Regardless, they work the same way. Some meters have an “off” position that serves as a switch, while others have a separate button to turn the meter on. The meter should be set to off during storage.
Jacks or holes in the housing for inserting the styli. Most multimeters have multiple jacks. One is usually labeled COM or (-) for general and negative. For connecting a black test lead. The other connector is labeled V (+) and the Omega symbol for Volts and Ohms, respectively, and positive charges. The + and - symbols represent the polarity of the probe when setting and testing the DC current value. If the test leads are installed according to the instructions, the red lead will be positive and the black lead negative. Many instruments have additional connectors that are required for high voltage testing.
Test Leads with Clamps: The tester comes with 2 leads: one black and one red.
Battery and fuse compartment: usually located on the back. Fully charged batteries will be required for resistance and test continuity.
Zero Adjust: This small button is usually located near a dial called Ohm Adjust, 0 ADJ, or similar. It is used only in ohmmeter mode or resistance range measurement, while the sensors are shorted, for example, to install a boiler thermostat.

Video review of working with a multimeter

Using a multimeter to measure resistance

Many do not know how to use a multimeter to measure resistance, but this is its main function, which will be especially useful if you need to install electrical wiring in an apartment or house. Set the multimeter to the Ohm indicator by turning the knob to the appropriate indicator (Figure 1).

Figure 1. Measuring resistance with a multimeter

Pay attention to the meter reading. If the test leads are not in contact with any object, the needle of the pointer or the analog meter of the tester will deviate to the left, when working with a digital device, the value will "jump" upward. This represents an infinite amount of resistance, or “breakage,” but also means that there is no path connection between the black and red probes.

Connect the black test lead to the -COM connector (Figure 2)
Connect the red test lead to the jack marked with the Omega (symbol denoting Ohm) or the letter “R” or “P” next to it (Figure 3)
Set the range (if available) to R x 100 (Figure 4)
Keep the test lead probes together. The pointer of the device should move completely to the right side of the dial. Find the "zero setting" and rotate the knob so that the meter reads 0 (or as close to 0 as possible) (Figure 5)

Figure 2. Connecting the black probe to -COM

Figure 3. Connecting the red test lead to the letter P (+) of the multimeter

Figure 4. Setting the Range on the Multimeter

Figure 5. Zero setting on the multimeter

Note that this position is called "Short Circuit" or "Ohm at Zero" and the reading for this range is 1 R X. Ohm Figure 6

Figure 6. Ohm at zero of the multimeter

Replace batteries (if necessary). If the ohmmeter does not show 0, this may mean that the batteries are discharged and must be replaced.

Using a multimeter to measure voltage (volts)

Set the meter to the highest range for Volts. alternating current... It is not yet known what voltage will be the highest, therefore, so that the device does not damage, we set the indicator to the maximum.

Insert the black dipstick into the COM or -. Volt Figure 1
Insert the red probe into the V or + hole. Volt Figure 2
Turn the dial to the desired mode (DCV or ACV) (Figure 3). The maximum scale value must match the range selector knob. Voltage readings are linear. Division accuracy up to 0.001 (Figure 4)
Check the shared electrical outlet.
Insert the black wire into one of the holes of the installed socket, the red wire into the other. Unplug the wires from the outlet, and crank the selector knob to the lowest range. Volt Figure 5
If the pointer did not move, it is likely that DC was selected instead of AC. The fact is that this error can be fatal, especially if the measurement is carried out to change the wiring in the apartment, so it is better to check the voltage in both modes.

Figure 3. Selecting the voltage measurement mode in the multimeter

Figure 4. Setting the ACV range in the multimeter

Figure 5. Measuring the voltage in the socket with a multimeter

Ammeter mode for a multimeter

How to use the dt 832, dt 838, dt 830b, dt9205a multimeter correctly in the voltage measurement mode in the car? This is not difficult to learn. Set the meter to the highest AC or DC if the Amp range is supported.

Note that most multimeters will only measure a very small amount of current in the μA and mA ranges. These are the current values that pass only in the thinnest electronic circuits, and thousands (and even millions) times less than the values in any home electrical network. For example, a conventional 100W / 120V emergency light bulb needs 0.833 amps.

Insert the black dipstick into COM or -.
Insert the red probe into -. Turn off the circuit power, turn off the isolation transformer.
The ammeter is placed in series with the circuit for measuring the current strength. The polarity must be observed. The current flows from the positive side to the negative side. Set the current range to the highest value (Figure 1)
Apply power and adjust the data range to decrease. Do not exceed the range of the flow meter, otherwise it may be damaged. A reading of about 2 mA should be indicated since from Ohm's law I = V / R = (9 volts) / (4700 Ω) = 0.00191 = 1.91 mA amplifiers.

Figure 1. Setting the current range

Some important nuances:

If the multimeter stops working, check the fuse. In some cases, it is necessary to use patch terminals (Figure 2)
Never connect the instrument through a battery voltage source or when installed to measure current (amperes).
It is important not only to be able to use the device, but also to choose high-quality devices. Test the device immediately at the time of purchase!
In addition to theoretical knowledge, we offer you to gain practical skills and watch a video on how to use a digital pointer and analog digital multimeter - dt 830v, dt 181, dt9208a, dt 182.

Figure 2. Contact terminals in the multimeter

The structure of the multimeter

Before starting work, it is necessary to study the components of the device, because instructions are far from always attached, we have prepared a description of them:

Dial: Has an arched scale visible through a glass or plastic display. A pointer on the display shows the scale values. If you are a digital multimeter (mastech mas838, ms8230b, m890d, dt700d, dt 9202a, 59002, mas830, my64), then its dial will be replaced by an ice display.
Pointer or arrow: This is a thin black needle at the leftmost position in the dial window, designed to read measured data on dial gauges - yx 360trn, pmm 600, sunwa yx 1000a, m83. Before using a pointer multimeter, be sure to read the instructions, especially the section "division values".
Switch or button: Allows you to change the functions (voltmeter, ammeter, ohmmeter) and scale (x1, x10, etc.) of the meter. Many functions have multiple ranges, as with touch switches. It is important to have a complete set of operating modes. Most meters use this type of pen as shown in the picture, but there are others. Regardless, they work the same way. Some meters have an “off” position that serves as a switch, while others have a separate button to turn the meter on. The meter should be set to off during storage.
Jacks or holes in the housing for inserting the styli. Most multimeters have multiple jacks. One is usually labeled COM or (-) for general and negative. For connecting a black test lead. The other connector is labeled V (+) and the Omega symbol for Volts and Ohms, respectively, and positive charges. The + and - symbols represent the polarity of the probe when setting and testing the DC current value. If the test leads are installed according to the instructions, the red lead will be positive and the black lead negative. Many instruments have additional connectors that are required for high voltage testing.
Test Leads with Clamps: The tester comes with 2 leads: one black and one red.
Battery and fuse compartment: usually located on the back. Fully charged batteries will be required for resistance and test continuity.
Zero Adjust: This small button is usually located near a dial called Ohm Adjust, 0 ADJ, or similar. It is used only in ohmmeter mode or resistance range measurement, while the sensors are shorted, for example, to install a boiler thermostat.

Video review of working with a multimeter

Using a multimeter to measure resistance

Figure 1. Measuring resistance with a multimeter

Connect the black test lead to the -COM connector (Figure 2)
Connect the red test lead to the jack marked with the Omega (symbol denoting Ohm) or the letter “R” or “P” next to it (Figure 3)
Set the range (if available) to R x 100 (Figure 4)
Keep the test lead probes together. The pointer of the device should move completely to the right side of the dial. Find the "zero setting" and rotate the knob so that the meter reads 0 (or as close to 0 as possible) (Figure 5)

Figure 2. Connecting the black probe to -COM

Figure 3. Connecting the red test lead to the letter P (+) of the multimeter

Figure 4. Setting the Range on the Multimeter

Figure 5. Zero setting on the multimeter

Note that this position is called "Short Circuit" or "Ohm at Zero" and the reading for this range is 1 R X. Ohm Figure 6

Figure 6. Ohm at zero of the multimeter

Replace batteries (if necessary). If the ohmmeter does not show 0, this may mean that the batteries are discharged and must be replaced.

Using a multimeter to measure voltage (volts)

Set the meter to the highest range available for AC Volts. It is not yet known what voltage will be the highest, therefore, so that the device does not damage, we set the indicator to the maximum.

Insert the black dipstick into the COM or -. Volt Figure 1
Insert the red probe into the V or + hole. Volt Figure 2
Turn the dial to the desired mode (DCV or ACV) (Figure 3). The maximum scale value must match the range selector knob. Voltage readings are linear. Division accuracy up to 0.001 (Figure 4)
Check the shared electrical outlet.
Insert the black wire into one of the holes of the installed socket, the red wire into the other. Unplug the wires from the outlet, and crank the selector knob to the lowest range. Volt Figure 5
If the pointer did not move, it is likely that DC was selected instead of AC. The fact is that this error can be fatal, especially if the measurement is carried out to change the wiring in the apartment, so it is better to check the voltage in both modes.

Figure 3. Selecting the voltage measurement mode in the multimeter

Figure 4. Setting the ACV range in the multimeter

Figure 5. Measuring the voltage in the socket with a multimeter

Ammeter mode for a multimeter

Note that most multimeters will only measure a very small amount of current in the μA and mA ranges. These are the current values that only pass through the thinnest electronic circuits, and are thousands (and even millions) times less than the values in any home electrical network. For example, a conventional 100W / 120V emergency light bulb needs 0.833 amps.

Insert the black dipstick into COM or -.
Insert the red probe into -. Turn off the circuit power, turn off the isolation transformer.
The ammeter is placed in series with the circuit for measuring the current strength. The polarity must be observed. The current flows from the positive side to the negative side. Set the current range to the highest value (Figure 1)
Apply power and adjust the data range to decrease. Do not exceed the range of the flow meter, otherwise it may be damaged. A reading of about 2 mA should be indicated since from Ohm's law I = V / R = (9 volts) / (4700 Ω) = 0.00191 = 1.91 mA amplifiers.

Figure 1. Setting the current range

Some important nuances:

If the multimeter stops working, check the fuse. In some cases, it is necessary to use patch terminals (Figure 2)
Never connect the instrument through a battery voltage source or when installed to measure current (amperes).
It is important not only to be able to use the device, but also to choose high-quality devices. Test the device immediately at the time of purchase!
In addition to theoretical knowledge, we offer you to gain practical skills and watch a video on how to use a digital pointer and analog digital multimeter - dt 830v, dt 181, dt9208a, dt 182.

Figure 2. Contact terminals in the multimeter

DT 182 DC CURRENT RANGE CONTENT 200 mA SAFETY RULES SPECIFICATIONS PANEL DESCRIPTION DC VOLTAGE MEASUREMENT AC VOLTAGE MEASUREMENT DC CURRENT CURRENT MEASUREMENT COMPACT RESISTANCE digital multimeter designed for measuring DC, AC current and voltage, resistance, diode test, sound continuity with high accuracy and simplicity. Light and small in size with a case and probes hidden in the body, this instrument will serve you for many years. SAFETY RULES - Always make sure the function switch is in the correct position. - To avoid electric shock, use CAUTION when measuring high voltages. Always turn off the circuit under test before connecting probes to it. - Before measuring resistance, make sure all power supplies (AC and DC) are turned off. - Never operate the device with the back cover open. Never apply the maximum permissible measured values to the input of the device. CHARACTERISTICS GENERAL Measurement method Dual integration mode Display 3.5-digit LCD display Polarity Automatic indication Measurement speed 2 - 3 times per second Battery discharge indicator sign on the left of the display Operating temperature range 0C - 40C, hum. 80%. Dimensions 70 x 120 x 18 mm Weight 110 g (including battery) Battery 9-12 V, can be used: GP23A or equivalent Accessories Battery GP23A, case, manual DC VOLTAGE RANGE 2V 20 V 200 V 500 V RESOLUTION CAPACITY 1 mV 10 mV 0.1V 1V ACCURACY (1year) 18-28С + 0.5% + 1D *) + 0.8% + 1D *) D - low-order unit Maximum allowable input voltage 500 V. AC VOLTAGE RANGE 200 V 500 V RESOLUTION CAPACITY RESOLUTION CAPACITY 0.1 V 1 V ACCURACY (1 year) 18-28С + 1.2% + 10D + 1.2% + 10D Operating frequency range: 45 - 1000 Hz. The maximum permissible input voltage is 500 V eff. Indication: Indication of the rms value of sinusoidal AC voltage. 0.1 mA ACCURACY (1 year) 18-28C + 2% + 2D Overload protection: fuse 200 mA / 250 V. RESISTANCE RANGE RESOLUTION CAPACITY 2 K 20 K 200 K 2000 K ACCURACY (1 year) 18-28 C 1 10 100 1K +1.0 % + 2D Open circuit voltage: approx. 0.65 V. Overload protection: 250 V rms. perm. current DIODE TEST RESOLUTION CAPACITY 1 mV TEST CURRENT 0.8mA MAX. VOLTAGE OPEN CIRCUIT 3.2 V Overload protection: 250 V eff. perm. current RING OF CONNECTIONS RESOLUTION CAPACITY 1 DESCRIPTION Sound signal at resistance. less than 50 Overload protection: 250 V eff. perm. INSTRUCTIONS FOR USE DC VOLTAGE MEASUREMENT 1. Set the function switch to position V = 2. Set the limit switch to the desired position. If the voltage to be measured is not known in advance, set the range selector to the highest limit, and then decrease the limit until the required accuracy is achieved. 3. Connect the test leads to the voltage source or load to be measured. The indicator will show the voltage and its polarity on the red probe of the device. 4. When the limit switch is set to “500 V”, the display will show “HV” to remind you of high voltage operation. Caution is required. AC VOLTAGE MEASUREMENT 1. Set the function switch to position V 2. Set the limit switch to the desired position. Measurements can be made with the switch position 2V and 20V, but accuracy is not guaranteed. 3. Connect the test leads to the voltage source or load to be measured. Read the readings on the display. 4. When the limit switch is set to “500 V”, the display will show “HV” to remind you of high voltage operation. Caution is required. DC CURRENT MEASUREMENT 1. Set the function switch to position A. 2. Set the limit switch to position 200 mA. Reading is possible with other positions of the limit switch, but the decimal point will not be displayed correctly. 3. Open the circuit to be measured and connect the test leads of the device in series with the load in which the current is measured. 4. Read the current value and polarity on the display. RESISTANCE MEASUREMENT 1. Set the function switch to position. 2. Set the limit switch to the desired position. 3. If the resistor to be measured is in the circuit, turn off the power and discharge all capacitors before connecting the probes. 4. Connect the test leads to the measured resistor and read the resistance value on the display. DIODE TEST AND RINGING OF CONNECTIONS 1. Set the function selector to position. 2. Set the limit switch to position. Connect the red probe to the anode and the black probe to the cathode of the diode under test. Read the forward voltage drop across the diode in millivolts on the display. When the diode is turned on in reverse, only “1” will appear on the display. 4. Connect the test leads to two points of the circuit, the signal will sound when the resistance of the circuit is less than 50 ohms. REPLACING THE BATTERY 1. When the battery is discharged, the icon appears on the left of the display. 2. Before replacing the battery, turn off the multimeter and disconnect the test leads from the circuits being measured. 3. Remove the screw on the rear cover and open it. Replace the battery observing the polarity. WARNING Do not operate the instrument until the rear cover is closed. FUSE REPLACEMENT A fuse rarely needs to be replaced and will burn out almost always as a result of operator error. To replace the fuse, unscrew the screw on the back cover and open it as you would when replacing the battery. Replace the fuse with the same type. WARNING 1. Before replacing a fuse, make sure the range switch is in the “OFF” position and disconnect the test leads from the circuits being measured. 2. To prevent fire, use fuses with the same amperage / voltage rating as the factory-installed fuse (200mA / 250V).

The DT182 is a small 100x50x20mm multimeter, very convenient for measurements in the field. Such multimeters are not protected from damage when voltage is applied to the input in the resistance measurement mode. In this case, the conductive layer on the low-resistance resistors of the ohmmeter-milliammeter divider burns out, and their ratings remain unknown. Failure of IC ADC is possible. It is often made using a package-free technology. Even if there are contact pads on the board, it is extremely difficult to find a suitable analogue for replacement. All that remains is to discard the multimeter.

Sometimes the device itself is not so much expensive as its absence. To repair such devices, it is not necessary to know their circuit; after purchasing the device, it is enough to remove the back cover of the case, draw the location of all the elements on a sheet of paper and put down their denominations (Fig. 1). It is advisable to glue the sheet with the layout diagram and the denominations of the parts to the back cover of the multimeter.

In devices of the M-93, DT92xx and others series, in the event of a breakdown of the IC in an unpackaged version, it can be replaced by an ICL7106 in a DIP-case, which can be glued on the free space of the board and soldered to the existing contact pads with a PEV-0.1 winding wire. Figure 3 shows the correspondence of the pins of these microcircuits.

To control the supply voltage, it is necessary to lead the wire from the negative pole of the battery to the countersunk bolt on the device body. When the device's own "V; Ohm" probe is connected to this contact at the "20 V" limit, the battery voltage value minus 3 V of the internal stabilizer will appear on the indicator. when the DT182 supply voltage is 12 V, the readings are -9 V. The supply voltage can be reduced to -7 V, the instrument readings down to -4 V.

After completing the revision or repair of the multimeter, the board can be varnished from the side of the elements location. In order to avoid getting the varnish on the contact surfaces of the mode and limit switch, the varnish should be dried by placing the device with the elements down.

Date of publication: 15.02.2008

Readers' opinions

bratmena / 19.02.2019 - 05:04
Friends! Is it possible for this trimming dt-182 to measure the current strength up to 10 amperes (this function is in the previous model dt-181)? I looked on the Internet - I could not find it. This is a very necessary function, and it is not clear why it was removed in this model (he would have known that he could not measure it - he would not have bought this product).
Ayrat Nuraev / 06/29/2018 - 15:43
There was such a malfunction - it stopped turning off in the "Off" position. The analysis of the malfunction showed that unauthorized jumpers were formed on the switch tracks in 3 places, apparently, the soft metal of the tracks was erased under the pressure of the switch contacts and accumulated between the tracks. I removed them with a needle and everything returned to normal. Moreover, it began to turn off after the removal of two jumpers, the third simply constantly lit the middle segment, turning "0" into "8".
victor / 07/21/2017 - 11:08
Tell me please. the device shows an underestimated voltage, for example, I measure a 12v battery and the display shows 0.38v. and with a break as well. the ohmmeter and ammeter are normal, the continuity is also normal. I can never use it incorrectly. after opening, I found a resistor R23 1 Ohm suspiciously dark, dropped out, changed everything, cleaned it, wiped it, but it did not help. Thanks.
Dmitry / 11/04/2016 - 09:41
I bought DT182 because of its small size. Everything works, but the diodes and transistors do not ring for diode continuity. Changed the battery did not help. Details without external damage. I can not understand why the buzzer works to close the probes, and the diodes and transistors will show numbers for a split second and again unit.Maybe faced with someone like that, help me figure it out. Thanks for earlier.
Valery / 10/29/2016 - 00:39
Disassembled DT182 removed the board (wash, clean the contacts, the lamellae of the switch fell off. The question of seats for lamellas 6 I had 5. How many lamellas should there be for the mode switch of the tester?
Grigory / 10/13/2016 - 10:39 PM
And my DT-182 circuit does not coincide at all with your circuit. Can you advise on how to modify my DT-182? http://fastpic.ru/view/82/2016/1013/c6641d3f4ab309abd011f89660d5a76f.jpg.html
Vlad / 05/23/2016 - 16:01
And who can tell how the following is treated: The device is lying in the readings, at the 20V position it shows -0.37?
dgts-24 / 03/10/2016 - 14:18
thanks helped
/ 29.09.2015 - 19:45
andre / 09/25/2015 - 06:22
the article is sensible, I read it. recently, too, burned a cartoon - a pair of resistors burned out - one of them is 900 ohms, the second is like 1 k. 900 ohms replaced by 1.1 k. it all worked. burned - measured the resistance on the switch under voltage (ringing the contacts). By the way. on old multimeters - it does not burn out like that - this is the current on fresh Chinese everything is on, since I always called it with the old M830b masteh multimeter - and nothing ever burned out, but then I lost the old one, bought a new IEK 830B - so it immediately burned out instantly a day later ... so the IEK multimeter is full of rubbish.
Anatoly / 09/16/2014 - 05:59
Why, when the input is short-circuited when measuring on the ohm scale, the display shows a value of 1-.5 ohm. The wire resistance of the input probes is much lower.
Igor / 12/18/2013 - 15:46
Thanks to all thanks to the advice, I revived my device !!!
vadim polyakov / 05/06/2012 - 10:24
how to use it?
Sergey / 27.02.2012 - 19:11
Thanks. Very good article
Kazimir / 09.01.2012 - 10:29
I have R 21 - 900 Om, and R16 burned out, but the first digit 1 was preserved, so I conclude that R16 is 152 or 1.5 kilo-ohms.
alex / 16.10.2011 - 21:14
on the probes sorry))))
alex / 16.10.2011 - 21:13
please tell me, in the dialing mode, I discharged the capacitor on the probes and now the device only measures the resistance and the continuity works, it does not measure the constant and the change, the numbers just jump. instrument type DT92xx
svem / 02.10.2011 - 10:28
Tell me pliz what is the difference between multimeters with a switch and a selector. The Chinese do a little different. According to rumors, the latter are more accurate. Thank you in advance.
marat / 09/29/2011 - 08:11
?
S.V. LEBEDEV / 03.09.2011 - 14:32
Thanks everyone! Replaced R16-dial tone earned !!!

Only with slightly reduced dimensions. An unpleasant feature of this multimeter is that it is not protected from damage when voltage is applied to the input in the resistance measurement mode. Very often from this, the IC ADC, made using open-frame technology, fails. Even if there are contact pads on the board, it is extremely difficult to find a suitable analogue for replacement. But with the DT-182's price of only $ 4, it's easier to throw out the old one (after removing the 12V battery and probes) and buy a new one.

For the repair of such devices, we will also give the location of the radio elements on the board.

The microcircuit can withstand an input voltage of 1.5 ... 1.8 V. For microcircuits with an unknown pin location, the input can be found by the details of the strapping or by the next voltage measurement between the common wire of the device - the "COM" probe - and each of the IC terminals. In the modes "Continuity diode measurement" and "200 Ohm" with open probes, this voltage is 1.10 V, in modes "2k" - "2M" - 130 mV. When the probes of the measured device are closed, the input voltage of the IC becomes zero.

The wires of the probes that come with the DT-182 are too thin and unreliable, and they are not fixed in the probes themselves, so after a few turns of the wire in the probes it comes off. Also, such thin wires give a considerable error when measuring resistance of 10 ohms or less. After purchasing a multimeter, it is recommended to immediately replace the wires with others with a larger cross-section, and fix them in the plastic probes themselves, wrapping PVC insulation on top, removed from a thin wire, and pushing the wire back into the probe with force.

Another weak link is the springy contacts of the battery. Unlike the usual 9 V crown used in the DT-830 full-size multimeters, a 23A mini-finger disk battery (these are not amps) for 12 V is installed here.

Due to the thin strips of metal of the contacts, they do not spring well and after several changes of the battery do not touch the battery at all. It remains to replace them with more reliable ones or even solder the power wires to the battery. By the way, it was this defect that was in this device, which was brought to me for repair.