With the help of a tester or multimeter, you can independently carry out a number of household measurements at home, for example, check the voltage in the outlet, determine the performance of a battery or accumulator, an electric light bulb.
It is necessary
- - battery;
- - multimeter.
Instructions
Step 1
Connect the tester probes to the battery: connect in parallel: plus to plus, and minus to minus. Then set the switch for the type of work to the values "Amperes - DC" Do not use the "Volts" position to test the batteries.
Step 2
To test the batteries for voltage, turn on the pull-up resistor. In the case when the tester is turned on in voltage measurement mode, there will be significant input resistance. And then the battery (practically without load) will display almost full or full voltage, for example, 1.5 volts. If it is faulty / unusable, then when installed in any device, the voltage will immediately decline.
Step 3
Set the job switch on the tester to constant current (amps) at maximum limit. On the multimeter, this mode will be called DC Voltage Test Mode. Short-circuit the battery for half a second so that you have time to fix the readings of the device. It is not worth keeping it longer, this can lead to a short circuit and negatively affect the functioning of the power supplies. Take a current reading from the meter to determine the suitability of the battery.
Step 4
Draw conclusions about the health of the battery after measuring the voltage according to the following characteristics. The current of twelve-volt batteries should be at least two and a half amperes, inexpensive finger batteries show a result of 2–2.5 A, and those that are more expensive, for example, Duracell or Energizer, should show at least 4–4.5 A.
Step 5
If during the measurement the result does not exceed one ampere, do not throw them away, use such copies in the remote controls of players or TVs. Remember also that the battery voltage is one and a half volts, and the battery voltage is 1, 2.
