how to use ammeter
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Answers
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1
Set the ammeter current type and range. If your ammeter divides the range of current into settings, choose the highest setting. Next you should select the kind of current you’ll be measuring: AC (Alternating Current) or DC (Direct Current).
Choosing the highest setting on your ammeter from the outset will prevent you from blowing the meter’s internal fuse if the amperage is too high.
Battery powered circuits run on DC. Other power supplies may be AC or DC, and some can alternate between both. Check the power supply manual or label to determine its current type.
2
Test the internal fuse of your ammeter. This will only take you a second and it will save you some time wasted on false readings. Your ammeter should have two leads: an input (+) and an output ( - ). Hold these together with your ammeter on. If the resistance rating is low, your fuse is good.
The resistance reading of your ammeter will be indicated on a display on the front of the meter. You may have to adjust the power range before it can read the low level of a working fuse.
Most ammeter fuses can be easily replaced or reset, though this process will vary according to your brand and model. Consult your ammeter’s manual to learn how to fix blown fuses.
If you adjusted the power range lower to check the fuse, reset the range to its maximum to prevent the fuse from blowing when taking the actual amperage.
3
Break the circuit. But before you do, make sure the power is off and all batteries are removed to prevent getting zapped. Now you need to create a break in the wiring between the negative ( - ) terminal of the power source and the power input for the item receiving power.
The ammeter will be tied into the circuit at this break so that electricity passes through the meter on its way to the item being powered, allowing the meter to take a reading.
You may be able to “break” your circuit by loosening the fasteners connecting wiring to the power source’s negative ( - ) terminal or at the power input for the item receiving power.
If you can’t create a break in the circuit at the negative ( - ) terminal or power input, you can cut, strip, and then resplice the wire.
Hope it helps you.
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Answer:
An ammeter measures the electric current in a circuit. The name is derived from the name for the SI unit for electric current, amperes (A).
In order for an ammeter to measure a device’s current, it must be connected in series to that device. This is necessary because objects in series experience the same current. They must not be connected to a voltage source — ammeters are designed to work under a minimal burden, (which refers to the voltage drop across the ammeter, typically a small fraction of a volt).
Explanation:
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