In the present scenario, almost everything works on electricity. Doesn’t matter whether it is a household appliance, toys, industrial equipment and recent days vehicles are being manufactured that run on electricity. Not only this we can’t even imagine our house without electricity. Without electrical power, we would be living in pitch darkness or we would have to opt for other ways of lighting. It would be like modern age people an early age. Hence our dependency on electrical energy has increased to a great extent. So there must be a device to measure the voltage and electricity. One such device is a multimeter.
Wiring in houses
The very first thing that a person does after getting his house or shop constructed is to get the electrical wiring done. Generally, the contractor himself provides a technician for this purpose then why you should always hire professional technician? As we know that a certain range of voltage is required for these appliances. High or even low voltage supply may lead to the malfunctioning of the devices and equipment. There could be an error on the part of a rookie but a professional will always make sure that wiring inside the house is done in a proper manner so the voltage supply is within the stipulated range. Any error in electrical wiring may lead to short-circuiting which eventually may get your house or shop on fire. To avoid such accidents, hiring a professional technician is the best choice.
It is a device that measures the current and voltage. Some advanced multimeter also measures resistance. Technicians use it to find the basic faults in the wiring. Now some people might think that why you should always hire professional technician? The answer to this is very simple. Though it is a hand-held device, normal people or a newbie might not be able to use it properly. And when the consequences are in the form of loss of life and property than trusting a professional technician is far better than going for an inexperienced technician just to save a few bucks.
Basically, a multimeter is of two types namely, analog multimeter and digital multimeter.
It is installed with a galvanometer and with a moving pointer to indicate the readings. It also uses an amplifier, set up between the meter movement and the measured circuit.
It has a numeric or digital display. Although it is preferred over the former as it is more accurate and durable. It has an embedded computer. It selects the range automatically. It auto-detects the polarity indicating that whether the voltage applied is positive or negative. It also has the feature of graphical representation.
The equipment to be investigated must be disconnected from the mains supply. Using a multimeter with the equipment attached to the mains supply may be risky and need and extra care. This may be cited as another reason for why you should always hire professional technician for getting any kind of assistance.