Levels accuracy - Checking level

[liamlomond9]

Hi Brilliant site

I have a 1200mm level and want to check its accuracy, I.E. have the bubble in the middle where it's supposed to be, and accurately level. Does anyone know how I can do this. Many thanks, Cheers

[remus]

The old style levels from years ago used to have adjustments on them. But I think that most these days are pre set in the factory.
If you find a fairly level surface, put your level on it and make a note of where the bubble comes in relationship to the lines. Then turn the level around. If the bubble comes in the same position the level is accurate.

Kevin

[liamlomond9]

many thanks for the reply,
Liam:D

[Tony McC]

You can have spirit levels properly tested for accuracy at specialist labs, such as York Survey in (of all places) York, or Survey Systems in Wilmslow (well, Handforth, really!) but the testing can cost as much as a new level. Automatic levels need to be tested and calibrated fairly regularly, and this is easiest to do in a lab, although there are ways and means of doing your own checking.

However, Kevin's answer is as good as you'll likely need: find a flat surface and take level readings using the spirit level one way and then turned through 180º - the bubble should come to rest in the exact same place for both readings.

[Bob_A]

Rather than start a new thread I thought I'd ask a question about levels here.

Now I know there are a lot of professionals on here requiring professional tools but do you think this would be useful for a diyer to help set out the levels of a 8m x 8m patio.
Cheers

http://www.screwfix.com/search.....h=79067

[msh paving]

i hate to admit it but i have a similar article i got from ebay it is usefull for short range simple level work on grade,more accurate than judging a turn on the bubble
but 4 bubbles each have a different grade so you need to keep you eyes peeled or tape over the unused bubbles not over priced but keep it in the simple grade work should be ok MSH

[Bob_A]

Cheers MSH
What I had in mind was a simple area with a straight forward fall.
Good tip about the tape:)

[Suggers]

That reminds me of (many moons ago) a good mate from college days, has a Moggie Minor, -
Me - " What's that bit of gaffa tape doin' over that dial with a red glow behind it?"
Him - " Oh, that's just the oil pressure warning light - it was gettin' on me nerves."