4 Fault Judgments of a Multimeter
Multimeters have a very wide range of applications, with the power electronics sector being the most common, as they are indispensable for measuring metal rotor flowmeters. A multimeter can not only measure the resistance of the object being tested and AC/DC voltage, but some can even measure key parameters of transistors, the capacitance of capacitors, and more.
Given their broad usage, instrument operators should be able to simply diagnose their faults. Today, let's popularize multimeter fault diagnosis!
Use the observation method to inspect components, such as whether they are discolored, bubbled, or spotted, and check for unusual odors.
If there are two metal rotor flowmeters of the same model or new spare parts, the replacement method can be used to diagnose faults.
Therefore, we generally recommend that enterprises with high usage frequency have a spare instrument.
Intermittent malfunctions in multimeters (e.g., working intermittently) are often caused by poor contact or cold soldering. The tapping and hand-pressure method can be used for diagnosis: gently tap suspected faulty components to see if it causes errors or shutdowns. Meanwhile, check plugs and the power supply to ensure stable power.
When a metal rotor flowmeter malfunctions in a high-temperature environment, cooling methods can sometimes eliminate the fault.
