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Fire Alarm -- Maintenance

Start with not knowing what is going on, learn from the experience, become experienced with the situation.
When things go wrong, an experience is happening. Learn from the experience and become experienced.
Douglas Krantz -- Fire Alarm Engineering Technician, Electronic Designer, Electronic Technician, Writer






How Does One Gain Experience?

By Douglas Krantz

Someone once said, "Experience is something you gain when things go wrong."

If every time one goes on site to fix the fire alarm system the problem is obvious, being a troubleshooter is boring. No experience is gained.

When, for the umpteen-hundredth time, the battery in someone's fire alarm communicator needs replacement, as a troubleshooter, you know what to bring into the building with you. It's an obvious problem, and it's an obvious fix. The equipment has called the monitoring company to say "replace the batteries" and the building manager may not even know about the problem yet.

You explain to the building manager the reason for the visit and say "I know what the problem is." You ask for the telephone room. Then, without any real troubleshooting, you replace the battery. Then you walk out; no experience gained.

Experience is Gained When Things Don't Work Out

Originally, the service call may have been for replacing the battery, but then a new battery doesn't fix it. When this happens, you have to wonder "Why doesn't it work?"

You search until you find the real problem and then you make the repairs.

Once the problem is found and fixed, you can say "I have gained the experience of finding and fixing this problem."
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Experience

When troubleshooting isn't obvious, when going on site one doesn't just walk up to the problem and fix it, when one can't say to the building manager "I know just where the problem is" without looking first, that's when new things are learned and that's when one gains experience.






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Douglas Krantz

Describing How It Works
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Electrical Flow


On this website, most references to electrical flow are to the movement of electrons.

Here, electron movement is generally used because it is the electrons that are actually moving. To explain the effects of magnetic forces, the movement of electrons is best.

Conventional current flow, positive charges that appear to be moving in the circuit, will be specified when it is used. The positive electrical forces are not actually moving -- as the electrons are coming and going on an atom, the electrical forces are just loosing or gaining strength. The forces appear to be moving from one atom to the next, but the percieved movement is actually just a result of electron movement. This perceived movement is traveling at a consistent speed, usually around two-thirds the speed of light. To explain the effects of electrostatic forces, the movement of positive charges (conventional current) is best.

See the explanation on which way electricity flows at www.douglaskrantz.com/
ElecElectricalFlow.html
.