Test a diode with advanced digital multimeter
Advanced digital multimeter has many useful test function , it is suitable for industrial use , technician level and also fit basic measurement. It provide both auto range and manual range setting , high DC and AC current test function and some model add temperature measurement. Another key feature it passed higher safety standard CAT III , CAT IV level which will print on multimeter to indicate and ensure safety , level of usage. Low cost digital multimeter can set range by manual only so it is suitable for student , DIY circuit , basic repairing. Here it will use advance digital multimeter to test diode. Is it easy to use ? , measurement below will give an answer.
Advance digital multimeter for industrial and complex measurement , technical level
Low cost digital multimeter for basic measurement.
CAT IV Measurement Category level is suitable for industrial measurement.
Step to test diode with advance digital multimeter.
1. Insert the red test lead to V Hz ll terminal and the black test lead to COM terminal.
2. Turn the range switch to Diode Test. The screen will display diode symbol as above photo No.1
3. Forward bias to diode , connect the red test lead to Anode terminal and black test lead to Kathode terminal. Good diode will display 0.3-0.8V. Shorted diode display 000 , open diode display OL.
Kathode terminal has white stripe indication.
Forward bias to diode , good diode will display 0.3-0.8V forward voltage drop
4. Reverse bias to diode , connect the red test lead to Kathode terminal and the black test lead to Anode terminal. Good diode will display OL. Shorted diode display 000 ( or very small amount such as 002)
Reverse bias to diode , good diode will display OL.
4. Shorted Diode will display 000 ( or very small amount such as 002) for forward biasing and reverse biasing. Switch the test leads also still get the same display as 000.
Shorted diode will display 000 ( or very small amount such as 002)
4. Open Diode will display OL for forward biasing and reverse biasing. Switch the test leads also get the same display as OL.
Open diode will display OL , switch the test leads still get the same OL display.
Read more .... all of other testing
