How to use a computer repair multimeter to detailed steps

You only need to know the usage of the multimeter, mainly to know the resistance and on/off gear.

Multimeter Maintenance:

1. Do not connect the voltage higher than 1000V DC or higher than 700V AC RMS.

2. Do not connect the voltage source when the function switch is in and position.

3. Do not use this watch when the battery is not properly installed or the back cover is not tightened.

Multimeter Repair:

1. Visual inspection.

If you find such as broken wire, desoldering, short circuit, broken fuse tube, burned out components, etc., you can touch the number of battery clusters, resistors, transistors, and manifolds.

The temperature rise can be referred to the circuit diagram.

Find out the cause of the temperature rise anomaly.

2. Voltage measurement method.

Measure whether the working voltage of each key point is normal, and the fault point can be found quickly. For example, measure the working voltage and reference voltage of a D converter.

3. Short circuit method.

The short-circuit method is generally used in the method of checking the AD converter, and this method is used more when repairing weak current and microelectric instruments.

4. Circuit breaker method.

Disconnect the suspicious part from the whole machine or unit circuit, if the fault disappears, it means that the fault is in the disconnected circuit. This method is mainly suitable for the case of short circuit in the circuit.

5. Measuring element method.

1.Protect against violent vibrations. 2.If not used for a long time, remove the battery. 3.The measurement voltage and current should be selected to the right range, and the meter pen should not be reversed.

How to repair a universal meter.

1. Sensory method: observe the appearance of the universal meter, and find that such as wire breakage, desoldering, short circuit, broken fuse tube, burned out components, mechanical damage, copper foil warping and fracture on the printed circuit, etc. You can touch the temperature rise of the universal meter battery, resistor, trouser or transistor, and manifold pure calendar.

Check whether the universal meter components are loose and whether the integrated circuit pins are firmly inserted. can hear and smell whether there are abnormal sounds and odors;

2. Voltage measurement method: measure whether the working voltage of each key point of the universal meter is normal, and the fault point can be found quickly. For example, measure the working voltage and reference voltage of a D converter.

3. Short-circuit method: The short-circuit method is generally used in the method of checking the universal meter A D converter, which is commonly used in repairing weak current and microelectric instruments;

4. Circuit breaking method: disconnect the suspicious part from the whole machine or unit circuit of the universal meter, if the fault disappears, it means that the fault is in the disconnected circuit;

Summary. 3. Professional maintenance masters: There are some professional maintenance masters who can provide maintenance services for multimeters, but they need to charge a certain fee.

Power failure of the multimeter is the most common cause and can be a damaged power cord, damaged power plug, damaged power strip, etc. 2. Circuit failure: The circuit failure of the multimeter may be damage to the circuit board, damage to the circuit components, poor circuit connection, etc.

Hello, I am happy to answer for you, your question is: multimeter repair point The answer is: the location of the multimeter repair point 1, electronic repair shop:

An electronic repair shop is a place that specializes in repairing electronic products, and can repair multimeters, but it costs a certain amount of money to dismantle them. 2. Electronic noise cover maintenance**: There are many electronic maintenance**, which can provide maintenance services for multimeters, but a certain fee is charged.

3. Professional maintenance masters: There are some professional maintenance masters who can provide maintenance services for multimeters, but they need to charge a certain fee. 4. Do it yourself:

If you have some knowledge of electronics, you can repair the multimeter yourself, but pay attention to safety. 2. Causes of the first shot problem 1. Power failure: The power failure of the multimeter is the most common reason, which may be damage to the power supply reed, damage to the power plug, damage to the power board, etc.

2. Circuit failure: The circuit failure of the multimeter may be damage to the circuit board, damage to the circuit components, poor circuit connection, etc.

3. Appearance failure: The appearance failure of the multimeter may be damage to the shell, damage to the buttons, damage to the display screen, etc. Third, the solution with the method and practice steps of Pei stupid 1, check the power supply:

First of all, check the power supply of the multimeter, check whether the power cord is damaged, whether the power plug is damaged, whether the power strip is damaged, etc. 2. Check the circuit: Secondly, check the circuit of the multimeter, check whether the circuit board is damaged, whether the circuit components are damaged, whether the circuit connection is poor, etc.

3. Check the appearance: Finally, check the appearance of the multimeter, check whether the shell is damaged, and whether the keys are damaged.

Multimeter repair service repair scope: pointer multimeter repair, digital multimeter repair, oscilloscope multimeter repair, as well as phase sequence meter repair, clamp meter repair, etc. Brands: Agilent agilent, Tektronix, Fluke multimeter repair manufacturers, multimeter repair** Shunqi.com.

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Multimeter Repair Service - Intelligent Manufacturing Network.

Multimeter repair service repair scope: pointer multimeter repair, digital multimeter repair, oscilloscope multimeter repair, as well as phase sequence meter repair, clamp meter repair, etc. Brands: Agilent agilent, Tektronix, Fluke multimeter repair manufacturers, multimeter repair** Shunqi.com.

Zhongyi ZT-S multimeter digital automatic without shifting general intelligent anti-burning high-precision maintenance universal meter **: Taiwan Brand: Zhongyi |Model Number:

ZT-S Shenzhen Dingxinyi Experimental Equipment**** Rent and sell AGILENT 3458A high-precision. Click on the link to take a look.

If there is a small problem, it is okay to repair it, and if you want me to see it, it is better to buy a new one to save trouble.

Question] [question].

Multimeter repair service.

Reference price x09 negotiable.

The specific transaction price is subject to the contract agreement.

Company Name: Chengdu Xingyingchuang Electronic Technology Co., Ltd.**** Brand Number: Location: Chengdu Manufacturer: Nature: **BusinessUpdated: 2015 12 29 21:07:24 Visits: 780

Product Label: Pointer Multimeter Repair, Digital Multimeter Repair, Oscilloscope Multimeter Repair, and Phase Sequence Meter Repair, Clamp Meter Repair.

Purchasing Department: 158--5710--0067

Multimeter repair manufacturers, multimeter repair**

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Saturday to Sunday 8:00-22:00 I don't know which city you are in, you call ** and ask Ha.

When repairing a car, once the multimeter burns out, the fuse needs to be replaced, and the Volkswagen family teaches everyone how to replace it.

Multimeter manufacturers generally do not allow personal repair, if within the warranty period, please send it back to the manufacturer If it is outside the warranty period, charge for repair, if you want to repair it yourself, you can check Fishtech Technology ** There is a special person to explain it to you].

The repair method of the analog multimeter is: 1: If the multimeter is damaged because of the wrong gear, you can generally check whether the fuse in the multimeter is blown first.

If it's broken, just replace it. If it doesn't break, it's a circuit problem. This is generally how it is repaired:

First turn on the multimeter, hit the gear to the gear when you burned out, and then check if the resistor on that gear is damaged, if it is, just change it. [Because the resistors in the multimeter are non-standard resistances, and they are all high-precision resistors with 5 color rings, it is difficult to buy, and the required resistance value can be obtained by connecting in series and in parallel], if it is not good, it is generally the meter head is damaged by overload. ]

2.A few points in the test of the digital multimeter (1) For high resistance, it is normal for the resistance test result to be different from the analog meter test result. This is mainly due to slightly different test conditions.

2) When testing the physical quantity of the correlation polarity, the polarity display corresponds to the stylus. That is, when the polarity is not displayed, the red watch pen contact is the high end of the potential or the current inflow end, and when the polarity is displayed "-", the red watch pen touch is the low potential or the current outflow end. (3) Resistors and diodes are different from pointer meters.

When the pointer meter measures the resistance, the red and black watch pens are opposite to the polarity of the test source, that is, the black watch pen is the positive end of the test source, and the red watch pen is the negative end. However, the polarity of the digital meter is consistent with the test source, that is, the red watch pen is the positive end of the test source, and the black watch pen is the negative end, which is consistent with the voltage and current block representation. This does not confuse and is superior to an analogue table.

4) For the triode that does not know the polarity or pin order, the electrodes of the triode can be identified and determined by the multiple pin change detection of the triode HFE stop. (5) Calibration. The digital multimeter should be calibrated regularly, and the same type or higher precision digital instrument should be selected when calibrating, and the order of first calibrating the DC block, then the AC block, and finally the capacitor block should be calibrated. ]

Multimeter repair method to find the fault should be first outside and then inside, easy first and then difficult, into zero, key breakthroughs. The methods can be broadly divided into the following:

The sensory method directly judges the cause of the fault by virtue of the senses, and through the visual inspection, it can find such as wire breakage, desoldering, short circuit, broken fuse tube, burned out components, mechanical damage, copper foil warping and fracture on the printed circuit, etc.; You can touch the temperature rise of the battery, resistor, transistor, and manifold block, and refer to the circuit diagram to find out the cause of the abnormal temperature rise. In addition, you can also check whether the components are loose, whether the integrated circuit pins are firmly inserted, and whether the transfer switch is cassette; can hear and smell whether there are abnormal sounds and odors;

The voltage measurement method measures whether the working voltage of each key point is normal, and the fault point can be found quickly. For example, measure the working voltage and reference voltage of a D converter.

The short-circuit method is generally used in the method of checking the AD converter mentioned above, and this method is used more when repairing weak current and microelectric instruments.

The circuit breaker method disconnects the suspicious part from the whole machine or unit circuit, and if the fault disappears, it means that the fault is in the open circuit. This method is mainly suitable for situations where there is a short circuit in the circuit.

Tools: Average lifespan:

1 Electric screwdriver for two years, if you use it for 4 hours a day, an average of 2 or 3 months to inspect and repair once.

2 The power of the electric soldering iron is 30-35W for one or two years, mainly depending on how much time it is used.

3 Digital multimeters know that caring for two or three years is not a problem.

4 Diagonal pliers 4'The brand is good, four or five years, and the kind that is not good for iron will be scrapped in a week.

5 needle-nose pliers 4'The brand is good, four or five years, and the kind that is not good for iron will be scrapped in a week.

6 Slotted anti-static brushes 7 Poke hairs Look at the frequency of use, generally a few months.

7 Pointed tweezers *** can be used for 2 or 3 years, and the pointed tip can be trimmed at ordinary times.

Have you ever used a multimeter with pointers? If you use it, it's easy to do! It's hard to explain if you're just getting started with multimeters.

This involves voltage and current, Ohm's law, and more! There is a lot of this information on the Internet. Since it is a multimeter, it is not something that can be clearly explained in two sentences.

It is possible to buckle and buckle the exchange.

Voltages and currents, as well as ohms, vary depending on the type of meter.

The multimeter is a relatively sophisticated electronic instrument, and people who do not have this professional knowledge once and for a while cannot repair it for ordinary users.

I recommend sending it to an exclusive repair shop for repair.

"Multimeter Repair" mainly introduces the use, basic structure and working principle of analog multimeter and digital multimeter, routine maintenance methods and maintenance examples. The content of "Multimeter Repair" is easy to understand and has practical value.

There are no dedicated instruments. Individuals are unable to repair. The internal parts are all dedicated. It is not available on the market. You can only try by replacing the battery. The battery voltage is too low. This can also be the case.

If you change it, you can go to the electrical repair department.