Just seen this on a for sale add
Description
Offered as spare/ Repair as doesn't turn on
PAT tested for safety
Is it just me or
Location: Dagenham Essex
Posts: 11,215
I'm Allen.
Just seen this on a for sale add
Description
Offered as spare/ Repair as doesn't turn on
PAT tested for safety
Is it just me or
[
Location: South West-ish, UK
Posts: 476
I'm Patrick.
Yeah, the earthing's fine it's just the fuse that has blown.
Doesn't have to work to pass a pat test. Just means it's electric ally safe
Regards,
Grant .... ؠ ......Don't be such a big girl's blouse
I've said it before and I'll say it again: democracy simply-doesn't-work.... ..... ...... ...... ................... ..... ..... ..... ..... .....
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Oh my god! There's nothing wrong with the bidet is there?
“Nothing discloses real character like the use of power. It is easy for the weak to be gentle. Most people can bear adversity. But if you wish to know what a man really is, give him power. This is the supreme test. It is the glory of Lincoln that, having almost absolute power, he never abused it, except on the side of mercy".
“You see these dictators on their pedestals, surrounded by the bayonets of their soldiers and the truncheons of their police ... yet in their hearts there is unspoken fear. They are afraid of words and thoughts: words spoken abroad, thoughts stirring at home -- all the more powerful because forbidden -- terrify them. A little mouse of thought appears in the room, and even the mightiest potentates are thrown into panic.”
"You don't have free will. You have the appearance of free will.”
“There's a war out there, old friend. A world war. And it's not about who's got the most bullets. It's about who controls the information. What we see and hear, how we work, what we think... it's all about the information!”
***SMILE, BE HAPPY***
He's probably cut the mains lead off. It's very safe now!
It is impossible for anything digital to sound analogue, because it isn't analogue!
Location: Dagenham Essex
Posts: 11,215
I'm Allen.
If it's not working how can you check it's electrically safe
[
Location: London/Durham
Posts: 7,003
I'm Lawrence.
Plug it in and stick your fingers in any holes you can find?
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Location: North Island New Zealand
Posts: 1,757
I'm Chris.
Equipment that has failed always provides very good reason electrically why it has a fault, then again intermittent faults and partial faults
can create headaches to solve- but rest assured the answer is always there.
A multimeter can help to diagnose equipment to assess a basic level of safety . Set to read resistance ohms and ranged so that it is very sensitive, firstly assess the meter itself
by touching red probe to black - it should reveal the very small resistance of the test leads, but will be reading 0.003 ohms or close to that.
Any faulty equipment should obviously NOT be powered ON, rather with the lead attached to the equipment BUT NOT plugged in, you can test resistance from
Active to Neutral which tests if the transformer internally in the equipment is or is not creating a circuit with its primary winding. The attached image shows a test of a 20VA
toroidal transformer showing resistance above 90 ohms proving its a valid primary winding.
Further tests involve observing the condition of the fitted fuse - if its intact the equipment if faulty has a very minor fault
if on the other hand the fuse is blown - you can observe if the fuse element has simply broken or worse it has shattered into
many pieces - inferring a major fault.
A testing technician will usually always take the precaution of using tools like a variac that can gently power the faulty equipment
rated at 240v AC with a much lower voltage like 50vAC to discern the exact location of a fault. A technician would also call upon
the schematic which is a drawing of all of the components how they connect, and would look for obvious faults like burned components
Equipment which displays continual faults invariably is not as well designed as it could be, and requires complete overhaul to
address the issues.
Location: Dagenham Essex
Posts: 11,215
I'm Allen.
Chris
Thanks for the reply , if I buy said item i will give it a go
[
You can carry out a partial PAT test on a Class I item that doesn't work, as this will still check out earth leakage across the main supply inputs to earth, which will give a warmer feeling that at least something catastrophic hasn't occured, melted all the insulation and shorted things to the case. That said, the earth leakage under operational conditions cannot be successfully performed.
It may all be academic anyway, as most of the items I've bought with PAT tested stickers on have either been carried out by a conman, or someone who doesn't know what they are doing. The first thing I check before powering anything up is the fuse condition and rating in the plug and, if I had £1 for the number of times I've found a 13A fuse fitted, I'd be quite wealthy!
Engineers: fixing problems you didn't know you had in ways you don't understand.
Same here, with a new item on the bench I always check the fuse rating and how well the plug is wired, if not a molded plug.
The worst I ever saw, admittedly decades ago, was about 20mm of bare conductor from every terminal within the 13A plug