Are there any now available at a reasonable price which are accurate? The
Gunson ones are crap, basically.

--
*Acupuncture is a jab well done*

Dave Plowman dave (AT) davenoise (DOT) co.uk London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" <dave (AT) davenoise (DOT) co.uk> wrote

I found very good results from the Professional one, but it needs care to
set up and even greater care in use. Great for your SDI and anything
precat. However, I would not regard it as accurate enough for all the new
stuff, which throws out really clean air with almost immeasurable CO.
I do know someone that has just replaced his Exhaust gas machine and has
the old one up for sale, it is an MoT quality Sun one (IIRC), if you want
his number drop me a line, it is reasonably near to you.

Mrcheerful

"Dave Plowman (News)" <dave (AT) davenoise (DOT) co.uk> wrote

I would add to that - very crap.

tim...

In article <LYB3i.28226$Ug.16105 (AT) fe1 (DOT) news.blueyonder.co.uk>,
MrCheerful <nbkm57 (AT) hotmail (DOT) com> wrote:
All I can say is mine reads nothing remotely close to an MOT one - which
I assume is accurate. And that's including observing the setting up
instructions to the letter. IIRC, the problem is it doesn't actually
measure the CO content.

Thanks. How big is it? It would need to be reasonably portable as I don't
have a garage.

--
*Did you ever notice when you blow in a dog's face he gets mad at you? *

Dave Plowman dave (AT) davenoise (DOT) co.uk London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" <dave (AT) davenoise (DOT) co.uk> wrote

I think they measure CO2 and correlate that to CO. I found that you need a
remote (non vehicle) power supply, to leave it warm up for at least fifteen
minutes and handle extremely gently, as even the slightest bump will affect
the accuracy.

The one my friend has is the standard, on a trolley type. about an eighteen
inch cube of actual operating stuff, plus the hose, screen etc. I don't
think you would get anything good in a significantly smaller package.

I think it is a DGA1800, there is one on ebay at present in east Sussex.

Mrcheerful

On Sat, 19 May 2007 14:21:11 +0100, "Dave Plowman (News)"
<dave (AT) davenoise (DOT) co.uk> wrote:

With care, most MOT gas analysers have to be calibrated every 6 months
and many will lock out the user if it is not done.

Graham

"Graham" <gra (AT) hglmotors (DOT) co.uk> wrote

I had the snap-on man remove the calibration requirement from my DGA 1800
before I sold it for £150, it will then work as a basic tester for ever.
You can pick these up on eBay for less than £100 now and a friendly snappy
man will type in the code for a drink.

"Fred" <Don't-ask (AT) hidden (DOT) co.us> wrote

Calibration is required every 6 months, especially with the age of the
equipment on sale, as it basically loses accuracy over that time. So not
having it calibrated again is going to be not so good for the poor punter
buying it.