电压表校准服务

With the aim of serving customers with the best after-sales services, EMIN Vietnam has established the Equipment Inspection - Calibration - Repair Service Center. With the support from numerous equipment manufacturers in the world, EMIN Vietnam possesses well-prepared calibrating instruments. EMIN Vietnam has successfully repaired and calibrated specialized equipment in Vietnam, ensuring the quickness, effectiveness and convenience for customers. Only few technical trading company in Vietnam do possess this technical capacity including EMIN Vietnam.


>> Voltmeter
- An electric measuring instrument used to measure the voltage between the two ends of the circuit (or electrical tools such as lamps ...).

In circuit diagrams Voltmeter is usually represented by the symbol (V).


>> Other information
♦ Classification
Main types of voltmeter are available:

1. The analogue voltmeter is constructed from a gavanometer, which displays data over a continuous range through a pointer on the scale;
2. Digital voltmeter, or digital voltmeter, adopts an analog to digital converter (ADC) and displays the data on the digital display.
When connecting a voltmeter to the circuit to be measured, the voltmeter extracts part of the electrical energy to determine the magnitude of the voltage. The level of extraction is determined by the resistance of the voltmeter on that scale, and to avoid deviating the circuit under test, this resistance must be large enough.

Previously, there was a large resistance voltmeter used for measurement in experiments, they invented a lamp voltmeter, a voltmeter with an amplifier circuit using an electronic lamp or transistor, ensuring a resistance of tens of mega Ohm. Nowadays, with microchip technology developed, the volt scales of a universal digital multimeter ensure these high input impedance requirements.

♦ Use
One can use an on-board voltmeter to measure voltage to deduce the plane's speed (theoretically). However, in fact, because the Earth's magnetic field has the direction and magnitude of the planet continuously changes (because planes sometimes fly high, sometimes fly low depending on the location), people do not use this method because The voltmeter changes continuously, making it difficult to determine the aircraft's speed. Instead, pitot tubes are used to measure aircraft velocity.

For further information about calibration service, visit our website at: https://emin.vn/en_US/calibration-inspection-service-985/pc.html


For further information and calibration requirements, Please contact

Equipment Inspection - Calibration - Repair Service Center - EMIN Vietnam JSC 

 Adress: No 11, Hoang Cau Moi Street, Trung Liet Ward Dong Da District, Ha Noi City

Email: hn@emin.vn - Hotline: 097.251.2864 (Mr. Truong)