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Multimeters are not just for electricians and technicians; even home users can also benefit from multimeters. It might seem difficult to understand how they work but it is easier than expected. Learn more about multimeters below.

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Hantek 2D72 3 in 1 Handheld Digital Oscilloscope + Waveform Generator + Multimeter
HK$ 1,407.00

Features: Oscilloscope + Waveform Generator + Multimeter: This multi-purpose oscilloscope owns 3 universal test instrument functions. Necessary helper for an engineer. Intelligent Charging Control: 5V/2A large current or USB port of ordinary computer can be charged, easy to use, very convenient and handy with Auto one-key test. Ultra-low Power Design: Type C charging interface, and standby for 2 months after every recharge of 2 hours with large capacity 18650 replaceable lithium batteries power supply. Universal Multimeter Function: Test voltage, current, resistance, diode, capacitance, continuity. Waveform Generator Output Function: Provide sine wave, square wave, triangular wave, trapezoidal wave and other waveform output, sine wave is up to 25MHz. 5V/2A Charger + Type C Charging Cable: Type C power + data transfer interface, can share the charger and data cable with your mobile phone. Small In Size Held In Single Hand: The 45 degree suspension bracket design provides you a work station anywhere anytime. One Key Export Out Quick Comparison: 2 groups of reference waveform+ 6 groups of waveformstorage, simple and effective. Digital Voltmeter Function: Automatic frequency and amplitude measurement, convenient to use and it supports Chinese English menu display. With Cursor Measurement Function: Supports time and voltage manual measurement, and measure the required waveformaccurately. Color LCD Screen: Exquisite and smooth lines make the waveformclear and undistorted when magnify with minimalist keyboard design simplify operation. Unibody Casing: Fine touch feeling, favorable impact resistance, outstanding heat resistance, easy to disassemble. Self Calibration Function: Free from level drift after long time unused. Scan Code for Video Help Function: Scan code on back of machine to get help of online video help.

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Uni-T Ut139C High Performance True RMS Digital Multimeters for Electrical Maintenance and Repairing
HK$ 336.00

Features Ut139 Series digital multimeters are newly designed to offer users better performance and higher safety rating. Totally over-load protection and unique structural design make it new type of multimeter with high performance/ price ratio and a best choice for electricians used in electrical maintenance and repairing. 1、True RMS for the whole series; 2、Measure signals with varied frequency (Vfc); 3、Measure large capacitance up to 100mF; 4、Optional Ac/dc 60A current clamps in different models to measure current up to 60A(1mv=1A); 5、ncv designed for the whole series, a necessity for electricians; 6、aa1.5V*2(5#) battery, easy for users to purchase and replace; 7、Soft rubber holster is easy to stand 2m drop; 8、Optional magnetic hanging strap offered to facilitate tests in special location; 9、Fast to replace fuse, just by opening battery cover; 10、Reliable with use of internal 2Pcs fuses with high-breaking capacity; 11、Protection against 600V input/1 minute from misconnection; 12、Safety Rating: CAT III 600V. Applications An ideal tool for equipment testing, maintenance and repair widely needed in electronics, electric power, schools, metallurgy, communications, manufacturing, petroleum, national defense, chemical industry, etc. Features: Display Count: 6000 Auto Range: Manual Range: True Rms: Bandwidth (Hz): 45Hz ~1kHz V.f.c: Duty Cycle: 0.1% ~ 99.9% Diode: Around 3V Ncv: Auto Power Off: Around 15 Minutes Continuity Buzzer: Low Battery Indication: 2.5V Data Hold: Relative Mode: Max/min: LCD Backlight: Input Protection: 600Vrms Input Impedance for Dcv: 1GΩ Max

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What Can a Multimeter be Used for at Home

A digital multimeter is a useful tool that can be used to test electronic components and circuits, learn about electronic designs, and even test a battery. A multimeter also enables you to conduct basic checks and troubleshooting electrical systems at home. Here are some things that you can measure with a multimeter:


Continuity testing is used to test the resistance between two points which lets you know whether they are connected electronically. If there is a low resistance, the two points are continuous, meaning that an electric current can flow freely from one end to the other. A tone is emitted by the multimeter to signify that the points are continuous. Hence, if there is no continuity, it means that there is a break somewhere in the circuit. This test is important and is considered one of the most useful tests for electronic repairs as it enables users to identify if two points are connected when they should not be and vice versa.


Before you conduct this test, take note that it is not advisable for home owners to test for AC voltage as it is more dangerous unless you are an expert. Hence, you should only test for DC voltage – the kind that runs on all consumer electronic devices. To test for DC voltage, first plug the black probe into the COM port on your multimeter and the red port into the mAVΩ port. Then switch on the multimeter and set the dial to DC voltage mode (indicated by a V with a straight line). As most multimeters are not autoranging, you will need to manually set the correct range for the voltage you want to measure. If you are not sure, start with the highest setting.

Once you are done with the setup above, place the red probe on the positive terminal and the black probe on the negative terminal. If the range you set is too high, the multimeter will not show a very accurate reading. If it is too low, the device will simply read 1 or OL, meaning that is out of range. In this case, simply set the dial to a higher range.


Before you begin a resistance test, make sure that no current is running through the circuit or component you want to test. Set up the multimeter by plugging the black probe into the COM port and the red probe into the mAVΩ port. Then, switch on the device and set the dial to resistance mode, represented by the Ω symbol. You need to manually set the range for the resistance you want to measure. Place the probes at each end of the circuit or component you want to test; it does not matter which probe goes where as resistance is non-directional. If the multimeter reads close to zero, the range is too high. If the range is too low or the component is not continuous, the multimeter will simply read 1 or OL.

To protect the electronic products you have at home, you should install these surge protection devices to prevent them from short-circuiting.