How to use a clamp ammeter, the correct way to use a clamp ammeter
Regarding the correct use of the clamp ammeter, the clamp ammeter can measure the current in the circuit without cutting off the circuit. Issues to pay attention to when using the clamp ammeter correctly include gear selection, measurement lead placement, usage environment, etc. .
How to use clamp ammeter
Since the clamp ammeter can measure the current in the circuit without cutting off the circuit, you should pay attention to the following issues when using the clamp ammeter correctly:
1. Choose the gear correctly
Before measuring the current, you should roughly estimate the size of the current to be measured based on the size of the load and select the appropriate range. When it is impossible to estimate, you can use a larger range first, and then change to a suitable range according to the size of the current being measured. However, when shifting gears, the wire to be measured should be placed outside the bayonet of the clamp ammeter.
2. The measuring wire should be placed in the correct position
When measuring the wire current, the current-carrying wire to be measured should be placed in the center of the jaws; when measuring the motor current, remove the movable magnet from the jaws and place a power cord of the motor in the center of the jaws.
3. Usage environment
Try to stay away from strong magnetic fields (such as energized auto-voltage regulators, magnets, etc.) and use a clamp ammeter to reduce the impact of the magnetic field on the clamp ammeter.
The correct way to use a clamp ammeter to detect current
When using a clamp ammeter to detect current, be sure to clamp one conductor (wire) being measured. If you clamp two (parallel wires), the current cannot be detected.
In addition, when using the center (core) of the clamp ammeter to detect, the detection error is small. When checking the power consumption of home appliances, it is more convenient to use a line separator. Some line separators can amplify the detection current by 10 times.
Therefore, currents below 1A can be amplified before detection. When using a DC clamp ammeter to detect DC current (DCA), if the current flows in the opposite direction, a negative number will be displayed. This function can be used to detect whether the car's battery is in a charged or discharged state. .
