Метод для вимірювання постійний струм струм оф а мультиметр
1. Insert the black lead into the COM jack. When measuring a maximum current of 200mA, insert the red lead into the mA jack. When measuring a maximum current of 20A, insert the red lead into the 20A jack.
2. Place the функція switch in DC струм діапазон A - відповідно діапазон.
3. Connect the test probe in series to the load to be tested, maintain stability, and then read. If it shows "1.", then the range need to be increased. If "-" appears to the left of the value, it indicates that the current flows from the black probe into the multimeter.
Операція поради
1. Select the DC current gear, and when the current range is unknown, start from the maximum range.
2. Pay attention to the direction of the current, that is, the red lead is connected to the positive pole (or high potential), and the black lead is connected to the negative pole (or low potential) of the power supply.
3. The meter should be connected in series in the circuit of the measured current.
4. The method of measuring AC current is similar to that of measuring DC current, but there is no polarity limitation.
Вимірювання кроки для постійний струм струм
Крок 1% 3a Поворот мультиметр до 200 мА постійного струму струм діапазон.
Step 2: Close S1 on the physical circuit.
Step 3: Connect the red lead to 1 and the black lead to 2, observe the reading, and measure that the the current between points 1 and 2 in the branch is 20mA.
4, запобіжні заходи
1. If the measured current range is not known before use, set the function switch to the maximum range and gradually decrease.
2. If the display is "1.", it indicates that the range is too small and the function switch should be set to a higher range.
3. The maximum input current is 200mA. Excessive current will burn out the fuse and it should replaced. The 20A range has no fuse protection and cannot exceed 15 seconds during measurement.
4. The measurement method of AC струм is the same as that of DC, but the gear should be set to AC gear A~. After the струм measurement, the red pen should be inserted back into the "V Ω" hole. If you forget this step and directly measure the voltage, the meter or power supply will be scrapped. Будь ласка працюйте обережно!
How to use a a digital multimeter to measure DC current_ Digital multimeter
Інструкції для вимірювання струм використання а мультиметр
Ідеально, the internal resistance of the the current range should be equal to zero, but in reality it cannot be achieved. Due to the the presence of internal resistance, there will inevitablely be a certain voltage drop when using a multimeter to measure current, resulting in measurement errors.
1. When the струм діапазон is the same, the smaller the internal resistance of the multimeter, the lower the full scale voltage drop, and the smaller the error in measuring current. For the same multimeter, the full scale voltage drop values for each current range can can be different.
2. For the same multimeter, the larger the current range, the smaller the the internal resistance, and the smaller the measurement error. Тому, in order to reduce the error in measuring current, it is іноді бажаний to choose a вищий струм діапазон. Of course, the діапазон повинен not be too high to avoid a значне збільшення in reading error when measuring small currents.
3. Коли the внутрішній опір of the струм діапазон is about 1 percent of the total resistance of the circuit being tested, there is no need to consider the multimeter voltage
