How to measure cable breaks with a digital multimeter
How to use a digital multimeter to determine the breakpoint of wires and cables: When a breakage fault occurs in a cable or cable, due to the outer insulation wrapping,
The exact location of the broken wire is difficult to determine. This problem can be solved easily with a digital multimeter. Specific method: Connect one end of the wire (cable) with a breakpoint to the live line of the 220V mains power, and leave the other end floating. Pull the digital multimeter to AC2V.
Starting from the live wire access end of the wire (cable), hold the tip of the black test lead with one hand, and slowly move the red test lead along the insulation of the wire with the other hand. At this time, the voltage value displayed on the display is approximately 0.445 V (measured by DT890D meter) is about.
When the red test lead moves somewhere, the voltage displayed on the display suddenly drops to 0.0 volts (about one-tenth of the original voltage).
About 15cm forward from this position (live wire access end) is the break point of the wire (cable).
When using this method to check the shielded wire, if only the core wire is broken but the shielding layer is not broken, this method is powerless.
How to use a digital multimeter to detect breakpoints in cable wires
In addition to measuring basic parameters such as voltage, current, resistance, capacitance and transistors, digital multimeters can also be used in various ways to further expand their functions and achieve the purpose of a multi-purpose meter.
How to use a digital multimeter to determine the breakpoint of wires and cables: When a breakage fault occurs in a cable or cable, due to the outer insulation wrapping,
The exact location of the broken wire is difficult to determine. This problem can be solved easily with a digital multimeter. Specific method: Connect one end of the wire (cable) with a breakpoint to the live line of the 220V mains power, and leave the other end floating. Pull the digital multimeter to AC2V.
Starting from the live wire access end of the wire (cable), hold the tip of the black test lead with one hand, and slowly move the red test lead along the insulation of the wire with the other hand. At this time, the voltage value displayed on the display is approximately 0.445 V (measured by DT890D meter) is about.
When the red test lead moves somewhere, the voltage displayed on the display suddenly drops to 0.0 volts (about one-tenth of the original voltage).
About 15cm forward from this position (live wire access end) is the break point of the wire (cable).
When using this method to check the shielded wire, if only the core wire is broken but the shielding layer is not broken, this method is powerless.
