The problem with today's technology and equipment is that most people do NOT READ the instructions! Whether it is because they feel that they don't need to or that it is beneath their level of intelligence, we all need to realize that the manufacturers wouldn't bother to write them and chop down millions of trees in the process of printing them if they were not necessary.
Most equipment comes with instructions and they are normally provided to assist in the use and care and maintenance of the equipment being used. Floor jacks for instance use hydraulic oil to operate, if the oil and the seals aren't checked regularly by following the maintenance instructions then the jack could fail during use and potentially cause a serious accident (once the jack has lifted the vehicle to the required height then axle stands should be used to support the vehicle for safety anyway.)
The same thing goes when using diagnostic equipment, although personal accident is a less likely occurrence in this regard, misuse could cause extensive (and expensive) damage to the equipment and because of misuse the likelihood of a warranty claim being possible is significantly reduced.
The bottom line is ALWAYS read the instructions and familiarize yourself with the operation of equipment before you use it.
Source: CDX Global & Wikipedia - en.wikipedia.org
