74. Use of modern electronic equipment grounding Why?

If the equipment is not grounded, when the staff touched the instrument input, there will be some leakage from the AC power line of fire, the transformer and 74 datasheet and the insulation resistance between the case and 74 price and the distributed capacitance to reach chassis, and 74 suppliers and then reach through the instruments input resistance input side, then through the body resistance to earth formed loop. Modern instruments are generally large input resistance, the pressure drop is also great, it is possible to reach tens of volts or higher. This is equivalent to the instrument input plus a lot of input signals, resulting in instrument instability or measurement error. For some work on the high sensitivity of the instrument, the instrument is easy to overload can damage the instrument. The chassis ground, the leakage current without input resistance, since the power transformer and the chassis to earth form a loop, so no impact on the instrument.