Cách đo điện áp và dòng điện một chiều DC

Bạn có đồng hồ vạn năng nhưng không biết cách đo dòng điện một chiều hoặc điện áp một chiều. Hãy để chúng tôi hướng dẫn cách đo điện áp và dòng điện một chiều DC cho bạn nhé. Mời đọc.

Cách đo điện áp bằng đồng hồ vạn năng

Bảng mạch đèn LED

Nguồn 9V DC được sử dụng để cấp nguồn cho mạch. Đèn LED sẽ phát sáng ngay khi chúng ta kết nối dây với nguồn điện. Hãy chắc chắn rằng tất cả các kết nối chặt chẽ. Nếu đèn LED không phát sáng sau khi kết nối nguồn, thì hãy kiểm tra kết nối và đèn LED.

đầu dò vạn năng được kết nối với mạch LED để kiểm tra điện áp
đầu dò vạn năng được kết nối với mạch 
LED để kiểm tra điện áp

Bước 1: Kết nối các thử nghiệm dẫn đến đồng hồ vạn năng.

Bước 2: Xoay núm xoay sang đoạn điện áp DV trong đồng hồ vạn năng ở 40DCV.

Bước 3: Kết nối các đầu dò trong mạch theo cực tính

Kết quả
Kết quả hiển thị trên màn hình

Bước 4:  Bật nguồn vạn năng.

Bước 5: Lưu ý đọc.

Đồng hồ vạn năng sẽ hiển thị điện áp trên toàn mạch. Ví dụ điện áp trên mạch này là 6,84V

Cách đo dòng điện một chiều bằng đồng hồ vạn năng

kết nối của các đầu dò trong đồng hồ vạn năng để đo dòng điện một chiều

Đồng hồ vạn năng có quy trình khác nhau để đo dòng điện. Dòng điện có thể được đo trong phạm vi của cối xay (tối đa 400mA) đến Ampe (tối đa 10A) như trong hình trên.

các đầu dò vạn năng được kết nối với mạch LED để đo dòng điện
Các đầu dò vạn năng được kết nối với mạch 
LED để đo dòng điện

Đồng hồ vạn năng hoạt động như một ampe kế khi đo dòng điện

Đặt thành vùng DCA
Đặt thành vùng DCA

Bước 1: Xoay núm trên phần DCA.

Bước2: Chọn xếp hạng hiện tại. Đồng hồ sẽ hiển thị dòng điện trong cả hai đánh giá.

Bước 3: Kết nối các thử nghiệm dẫn đến cài đặt đo dòng điện.

Bước 4: BẬT vạn năng.

Bước 5: Đồng hồ vạn năng sẽ hiển thị dòng điện trong mạch hiển thị như trong hình bên dưới.

Đồng hồ vạn năng hiển thị đọc dòng điện một chiều từ mạch LED
Đồng hồ vạn năng hiển thị đọc dòng điện một chiều từ mạch LED

Như được hiển thị, 0,4 mA dòng điện chảy vào ciruit.
Như vậy bạn đã biết cách đo dòng điện một chiều DC rồi phải không. Chúc các bạn thành công.

Mời xem thêm: Cảm biến vị trí là gì ?

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