Contact Us
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Tel: +8618822802390
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E-mail: admin@gvda-instrument.com
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WhatsApp: 8618822802390
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Add: Room 610-612, Huachuangda Business Building, District 46, Cuizhu Road, Xin'an Street, Bao'an, Shenzhen
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n202609100937006bc33.jpg)
How to Measure Internal Resistance of Multimeter Ammeter Range
How to Measure Internal Resistance of Multimeter Ammeter Range Question A flashlight bulb and a battery form a discharge circuit. I want to connect a multimeter in series into the
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n20260910092958a150f.jpg)
The Relation of Multimeter Ammeter Internal Resistance to Electric Power
The Relation of Multimeter Ammeter Internal Resistance to Electric Power Relationship Between Multimeter Current Internal Resistance and Electric Power Under ideal conditions, the
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n202609100923575912f.jpg)
Methods for Testing Fluorescent Lamps with a Multimeter
Methods for Testing Fluorescent Lamps with a Multimeter A common fluorescent tube (lamp strip) has four pins. How are its internal parts connected and what is its working principle
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n20260910091950eb659.jpg)
Methods for Testing the Quality of Chargers with a Multimeter
Methods for Testing the Quality of Chargers with a Multimeter Method 1: Use the resistance range or diode range of the multimeter to check whether the power input wire is open-circ
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n20260910090855884d0.jpg)
Methods and Tips for Measuring Circuit Earth Resistance with a Multimeter
Methods and Tips for Measuring Circuit Earth Resistance with a Multimeter Find two pieces of Φ12 steel bars, each about 1 m long. Polish their surfaces smooth with sandpaper. D
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n202609100901349d491.jpg)
How to Measure AC and DC Using a Multimeter
How to Measure AC and DC Using a Multimeter ① Measuring AC Voltage with a Digital Multimeter: Connect the black test lead to the COM or ground jack (marked on the meter terminal),
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n20260910085555dcfb4.jpg)
Why a Multimeter Cannot Measure the Polarity of Alternating Current
Why a Multimeter Cannot Measure the Polarity of Alternating Current Alternating current (AC) is an electric current whose magnitude and direction change periodically. It has no pol
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n20260910085028c575e.jpg)
Precautions for Using Analog MF47 Multimeter
Precautions for Using Analog MF47 Multimeter Precautions for Multimeter Use (1) Before using the multimeter, perform "mechanical zero adjustment". That is, when no electr
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n20260910084719d7e83.jpg)
Notes on Operation of Analog Multimeters
Notes on Operation of Analog Multimeters ① Before use, carefully read the product manual to fully understand the performance of the multimeter. Correctly interpret the meaning of s
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n202609100845075dfba.jpg)
Three Practical Tips for Using a Multimeter
Three Practical Tips for Using a Multimeter 1. Testing Continuity of Wires with a Multimeter First, confirm there is no voltage across both ends of the wire. Either DC or AC voltag
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08
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n2026090910480595f01.jpg)
Multimeter Test Procedure for Ordinary Light-emitting Diodes
Multimeter Test Procedure for Ordinary Light-emitting Diodes 1. Measurement with the Multimeter R×10k Range An analog multimeter with the R×10k range can be used to rou
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08
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n20260909103925305dd.jpg)
Detect Wire Short Circuits with a Multimeter — Get Instant Results Effortlessly
Detect Wire Short Circuits with a Multimeter - Get Instant Results Effortlessly 1. Test Method Separate the conductors of the two wire terminals, ensuring no crossing or contact be
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08
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n2026090910304096843.jpg)
How to Test Thermistor Quality Using a Multimeter
How to Test Thermistor Quality Using a Multimeter When performing the test, use the ohm range of the multimeter. The operation consists of two steps: First, conduct the room-temper
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08
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n20260909102615c0e2a.jpg)
Daily Maintenance of Digital Multimeter Calibrator
Daily Maintenance of Digital Multimeter Calibrator The digital multimeter calibrator is used to verify multimeters and various meter heads of Class 1 and below. Improper operation
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08
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n2026090910194615810.jpg)
Summary of Maintenance Methods for Digital Multimeters
Summary of Maintenance Methods for Digital Multimeters I. Maintenance Methods for Digital Multimeters Digital multimeters feature high sensitivity and accuracy and are widely used
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09
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n20260909100926fb5c2.jpg)
How to Measure DC Current with a Multimeter: Four Steps to Remember
How to Measure DC Current with a Multimeter: Four Steps to Remember 1. Mechanical Zero Adjustment A multimeter can measure resistance and voltage. Mechanical zero adjustment must b
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08
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n20260909100355165c6.jpg)
How to Use a Multimeter to Check for Electrical Leakage
How to Use a Multimeter to Check for Electrical Leakage First, set the multimeter to the 250V AC voltage range. Insert both test leads into a live socket to verify whether the mult
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08
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n202609090958391b816.jpg)
Five Precautions for Testing Circuit Short Circuits with a Multimeter
Five Precautions for Testing Circuit Short Circuits with a Multimeter Before testing a circuit for short circuits with a multimeter, turn off the main power supply. Then use the 1&
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08
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n202609090953035cdef.jpg)
Sharing of Methods for Measuring Current with a Multimeter
Sharing of Methods for Measuring Current with a Multimeter Range Selection The DC current range of the multimeter is marked with "mA", including three ranges: 1mA, 10mA a
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08
Sep
2026
![[[TitleNews]]](/uploads/25961/info/n2026090909460550de3.jpg)
Eight Methods for Multimeter to Judge Common Faults of Instruments and Meters
Eight Methods for Multimeter to Judge Common Faults of Instruments and Meters 1. Tap and Press Method It is common to encounter intermittent faults in instruments during operation.