What if the resistance of a digital multimeter does not go to 0 when shorted?
Hold down the HOLD+RANGE keys simultaneously for 10 seconds to zero.
Digital multimeters are available as portable units for basic troubleshooting or as bench-placed units, some with resolutions up to seven or eight digits.
A digital multimeter is an electronic instrument to be used in electrical measurements. It can have many special functions, but the main function is the measurement of voltage, resistance and current. Digital multi-meters, as modern multi-purpose electronic measuring instruments, are mainly used in the field of physical, electrical and electronic measurements.
Digital multi-meter in terms of safety features
1,Fuse current input protection.
2,Use of high energy fuse off (600 volts or higher).
3, High voltage protection in resistance mode (500 volts or higher).
4, Voltage transient protection (6000 volts or higher).
5,Safety designed test leads, safety handles, etc..
6, Independent safety certification.
Regardless of what the digital table, 20MΩ or 200MΩ block, that is, more than 20MΩ gear resistance block even if the high resistance, high resistance shorting the pen shows 0.9 is generally normal, in the case of determining the 7106 reference voltage is normal, shorting the pen 0.9 is not considered to have a fault. Because 200MΩ belongs to the high resistance block.
Digital multimeter resistance measurement steps
Step 1: Insert the black pen into the "COM" hole, the red pen into the "VΩ" hole.
Step 2: Select the appropriate resistance range, the black and red pens were connected to both ends of the resistor, pay attention to try not to use your hands at the same time to contact the two ends of the resistor, due to the human body is a very large resistive conductor, which affects the accuracy of resistance measurements.
Step 3: Combine the data shown on the display with the resistance range to get the final measurement result.
