Safe operation instructions for oscilloscope probe that must be read by engineers

The probe is the bridge between the oscilloscope and the measured object , Without this bridge , The oscilloscope cannot read the information of the tested object , Therefore, the oscilloscope probe is also an integral part of the test . that , What problems should we pay attention to when using the oscilloscope probe ？ Today, oscilloscope probe experts —— Puke Technology （PRBTEK） Share with you the use of Oscilloscope probe Safety precautions that must be known ：

PRBTEK It is suggested that users should read the following safety precautions , Avoid personal injury , Prevent damage to the test equipment or any product connected to the test equipment . To avoid possible losses , Use the test equipment only according to the manufacturer's instructions . remember , All voltages and currents are potentially dangerous , Including personal injury or equipment damage .

One 、 Observe the rated data of all terminals

● To avoid fire or electric shock hazards , Observe all ratings and marks on the product . Before connecting the product , Consult the product manual , For further rating information .

● Do not apply a potential greater than the maximum rating of any terminal .

● Only connect the ground wire of the probe to the ground .

Be careful :

For oscilloscopes specially designed and specified for floating oscilloscope applications ( Such as tech THS700 Series battery powered digital storage oscilloscope ), The second line is the public line , Not ground . under these circumstances , The manufacturer's specification for the maximum voltage that can be connected shall be observed .

● Inspection probe and test equipment instructions , Observe the information of any rating decrease . for example , As the frequency increases , The maximum input voltage rating may decrease .

Two 、 Use the correct grounding procedure

● The probe is indirectly grounded through the ground wire of the oscilloscope power line . To avoid the risk of electric shock , The ground wire must be connected to the ground . Before connecting the input or output terminals of the product , Ensure that the product is properly grounded .

● Do not try to make the power line of any test equipment grounding defects .

● Only connect the probe ground wire to the ground .

● Separate the oscilloscope from a ground that is not specifically designed and designated for such operations , Or connect the ground wire to any other item besides the grounding , It may cause the connector of oscilloscope and probe 、 Dangerous voltage appears on control equipment or other surfaces .

Be careful :

This applies to most oscilloscopes , But some oscilloscopes are designed to work in floating applications , Such as tech THS700 Series battery powered digital storage oscilloscope .

3、 ... and 、 Connect and disconnect the probe correctly

● First connect the probe to the oscilloscope . Before connecting the probe to any test point , The probe should be properly grounded .

The probe ground wire should only be connected to ground _ On .

● When disconnecting the probe from the circuit under test , First unplug the probe tip from the circuit , Then disconnect the ground wire .

Except probe tip and probe connector center wire , All metals that can be touched on the probe ( Including grounding clip ) Must be connected to the connector housing .

Four 、 Avoid exposed circuits

● Avoid touching exposed circuits or devices with hands or any other part of the body .

● The connection between the probe tip and the ground clamp must be Ensure that it will not accidentally touch or touch other parts of the circuit under test .

● Avoid RF Solidification

● In existence RF At high power , Resonance and reactance effects may convert small voltages into potentially harmful or dangerous voltages .

● If necessary, it exists RF Use the probe in areas where there is danger of fusion , Turn off the power of the signal source , Then connect or disconnect the probe lead . When the circuit is active , Do not handle input leads .

● Do not use measuring equipment without a protective cover

● When removing any protective cover or protective housing , Oscilloscopes and probes should no longer be used . Remove the protective cover 、 Shell 、 The wires or components exposed by the probe body or connector shell may have dangerous voltage .

5、 ... and 、 Do not use measuring equipment in a humid environment

● To avoid electric shock or damage to the equipment , Do not use measuring equipment in a humid environment .

6、 ... and 、 Do not use measuring equipment in explosive atmosphere

● Using electrical or electronic equipment in explosive atmosphere may lead to explosion . Gasoline in use or storage 、 solvent 、 Ether 、 Propane and other volatile substances , Explosive air may be produced . in addition , Some fine dust or powder suspended in the air may produce explosive air .

7、 ... and 、 Do not use measuring equipment when there may be problems

● If you suspect that there are electronic or physical problems with the oscilloscope or probe , It should be checked by qualified personnel , Can continue to use .

How to maintain the oscilloscope probe ?

● Water vapor on the probe 、 Dust and other impurities will provide a conduction path . To ensure the safety and accuracy of measurement , Keep the probe surface clean and dry .

● Only use the procedures specified in the probe instructions to clean the probe .

Which environments are not suitable for using the probe ?

● Immersing the probe in liquid may provide a conduction path between internal devices , Or damage or corrosion of internal devices or external enclosures and shielding .

● Only use the procedures specified in the probe instructions to clean the probe .

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