Anyone reccomend a good C.A.T scanner.

[eggsarascal]

5 minutes ago, Matthew Storrs said:

Good call, just booked a cat scanner course my local NHS trust is offering, should do the trick?

Yeah, I would have thought so. 

[Shane]

Let us know how you get on.

 

I've wondered about the insurance get-out on this, ie

If you use a scanner but hit something, will the insurers argue that you couldn't have scanned properly.

 

It really seems we need to identify EVERYTHING down there all the time, otherwise we are screwed.

What happened when you hit the gas supply?

[Matthew Storrs]

41 minutes ago, Shane said:

Let us know how you get on.

 

I've wondered about the insurance get-out on this, ie

If you use a scanner but hit something, will the insurers argue that you couldn't have scanned properly.

 

It really seems we need to identify EVERYTHING down there all the time, otherwise we are screwed.

What happened when you hit the gas supply?

I paid for the gas repair myself, utilities had it fixed in an hour or two and I got a bill for £800. The funny think was the hole I drilled when I did it wasn’t even the job but just added an extra fence rail in to make good a corner! Such is life.

i asked ins if I would have been covered, they said yes as long as all precautions were taken- ie I had scanned the area and or got maps!

often moled in pipes arnt accurate on maps anyway so they should always be taken with a healthy pinch of salt.

[LeeGray]

Hit bt and water in the same hole before, luckily the person who built the house was there and consulted after I suggested it looked in line with meter box from road. Got down to the duct, stopped and got owner and builder out. “Oh no, that’s just old gpo duct...just give it a pull” was the call. I said ok but you pay if it’s wrong, 2 minutes later the yard was full of water and teenager came out worried the internet wasn’t working!

 

[dent]

Plastic gas and water mains arnt picked up by cat scanners and older scanners dont pick up fibre optic cables 

If u feel the need to scan you should have stats from dial before you dig aswell that way you know what is registered in the visinity 

Newer cat scans can be downloaded onto a computer to prove they have been used 

And even they very latest cat scans can give plenty of false readings saying something is there so if you have the stats printed out it helps a lot 

[eggsarascal]

21 minutes ago, dent said:

Plastic gas and water mains arnt picked up by cat scanners and older scanners dont pick up fibre optic cables 

If u feel the need to scan you should have stats from dial before you dig aswell that way you know what is registered in the visinity 

Newer cat scans can be downloaded onto a computer to prove they have been used 

And even they very latest cat scans can give plenty of false readings saying something is there so if you have the stats printed out it helps a lot 

yes, false reading are common. I scanned my driveway when I wanted to get a mate in to thrust bore me a new water main and 'found' a power cable, the supply to my property comes in overhead. The only power underground here I put in from the house to the garage at the rear of the house. My mate scanned it and got a reading for power, l assured him there wasn't anything there he said if we hit anything it's a on your head which I was happy. He didn't hit anything.

[openspaceman]

13 hours ago, Matthew Storrs said:

Think I’m right in saying you need the Genny for gas and water. And be able to put a conductor on the pipe in the first place.

 

i hit a gas last year, the area hadn’t been scanned, but wonder if it would ever pick it up anyway as the pipe had been moled in.

We used C Scope

 

Just remember it is a cable avoidance tool, it doesn't prove anything is not there.

 

As to fibre optics I'd be interested to know how it finds those.

 

It looks for electrical "noise" which can be from signals passing in a conductor, AC travelling in  a conductor or induced currents in an isolated conductor from another electrical source.

 

The ones we had had three detection settings, 50Hz, radio frequency and generator. Always best to scan on all three.

 

It won't find gas or water pipes unless they have a conductor in or buried with them, even then you would need access to one end of the conductor to inject a signal. I buried some old cable when I installed a gas supply on site.

 

The generator setting is interesting and there are two detectors in the Cscope, one above the other, so it can tell the difference in time it receives the signal  on each receiver and calculate the depth.

[eggsarascal]

9 minutes ago, openspaceman said:

We used C Scope

 

Just remember it is a cable avoidance tool, it doesn't prove anything is not there.

 

As to fibre optics I'd be interested to know how it finds those.

 

It looks for electrical "noise" which can be from signals passing in a conductor, AC travelling in  a conductor or induced currents in an isolated conductor from another electrical source.

 

The ones we had had three detection settings, 50Hz, radio frequency and generator. Always best to scan on all three.

 

It won't find gas or water pipes unless they have a conductor in or buried with them, even then you would need access to one end of the conductor to inject a signal. I buried some old cable when I installed a gas supply on site.

 

The generator setting is interesting and there are two detectors in the Cscope, one above the other, so it can tell the difference in time it receives the signal  on each receiver and calculate the depth.

Are fibre-optic cables communication cables/lines?

[openspaceman]

24 minutes ago, eggsarascal said:

Are fibre-optic cables communication cables/lines?

Yes but I don't know  what it is that they emanate that a CAT can detect

Edited August 4, 2018 by openspaceman
typo

[eggsarascal]

6 minutes ago, openspaceman said:

Yes but I don't know  what it is that they emanate that a CAT can detect

I saw a machine a while back that could locate fibre optics but the more I think about it was'nt a cat as such. I think it was a ground penetrating radar? Although there is a radio detection cat that claims to be able to locate communication cables. I wonder if they are referring to Ethernet?