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Old 01-14-2017, 03:57 PM   #21
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I don't know about a flow chart. I have both fixed AND broken enough stuff to know likely causes of problems. But I know this: if you don't already have one, GO BUY A MEGGER!

Some guys here swear they can get by without one, but really that's only because they have no other choice. This past Thursday I was trying to locate a problem with an intermittently tripping GFCI circuit. My ohm meter didn't see a problem but two different GFCI breakers said different. The megger found it was a worn spot in an underground cable.

Get a megger.
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Old 01-14-2017, 10:42 PM   #22
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Originally Posted by RePhase277 View Post
I don't know about a flow chart. I have both fixed AND broken enough stuff to know likely causes of problems. But I know this: if you don't already have one, GO BUY A MEGGER!

Some guys here swear they can get by without one, but really that's only because they have no other choice. This past Thursday I was trying to locate a problem with an intermittently tripping GFCI circuit. My ohm meter didn't see a problem but two different GFCI breakers said different. The megger found it was a worn spot in an underground cable.

Get a megger.
Absolutely!
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Old 01-15-2017, 12:56 PM   #23
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The best advice I can offer, in regards to industrial equipment, is start at the field devices and assume it's not the PLC until you absolutely know it's nothing else. Work from the field devices back.
Whats wrong with the middle? At least then you know which way to go.
I'm only kidding you.

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Always start at the beginning and work your way out from there.
Whats wrong with the middle? At least then you know which way to go.
I'm only kidding you.

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We all use a flowchart to troubleshoot, but it's all in our heads.
This folks. Everyone has their way of troubleshooting.
We all process problems in our own way.
That is why I quoted myself above, cause there is no way that is wrong or right. There is only the way you are able to find the problem and correct it.
Personally I have always liked the saying "Keep It Simple Stupid". (KISS)
I could not count the times I have over reacted to problems and made my job much harder.
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Old 01-15-2017, 01:07 PM   #24
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Whats wrong with the middle?
Guys that do this wear themselves out going in one direction then the other.


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Personally I have always liked the saying "Keep It Simple Stupid". (KISS)
The first non family company i worked for had their own method of doing things. The staff engineers put together a training program for new hires to get you on board with their MIT based thinking process. They taught the 3 questions of troubleshooting.

1. What is it supposed to do?
2. What does it do?
3. What isn't it doing?
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Old 01-15-2017, 10:34 PM   #25
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Whats wrong with the middle? At least then you know which way to go.
I'm only kidding you.
Nah, you're not wrong. Improperly secured wiring can rub through the insulation and create a short that wakes you up at 1:00 AM haha.
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