The short anwer is YES, it does.
However, one can always make a further question.
 |
| Choosing among different instrument techonologies |
Why does it?
This question is anwered by recalling about two important activities in engineering:
- instrument selection and
- instrument specification.
You cannot select/specify the most convinient instrument for your control loop or monitoring or recording task unless you know the process requirements such as
- precision,
- installation location,
- available power,
- available budget,
- control mode,
- compatibility with already installed hardware/software, etc.
Once you know the above you need to find the instrument technology that matches this requirements. The only way of doing this is by also knowing the working principles of a number of instruments or technologies available.
You should remember, as well, that selection/specification may become an iterative procedure. This is, a choice for instrument with certain capabilities may be changed in further stages of the design of a control loop so that models, power input, communication, etc. can change a number of times.
Knowing the working principles of the instruments installed in the process may also help in troubleshooting assesment. This not only will save you time but money.
Any question? Write in the comments and I shall try to help.
Other stuff of interest
- LE01 - AC and DC voltage measurement and continuity test
- LE 02 - Start and stop push button installation 24V DC
- LE 03 - Turn on/off an 24V DC pilot light with a push button
- LE 04 - Latch contact with encapsulated relay for turning on/off an AC bulb light
- What is a process variable?
- What are the most important process variables?
- Time dependence of process variables
- A list of process variables
Ildebrando.
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