Uptowngirl Posted September 9, 2011 Share Posted September 9, 2011 An accelerometer and known mass. Despite what you think there are people out there who actually do build these things or do you assume your car just pops into existance at some building somewhere with no human input at all? Of course you did. I am fully aware of the fact that people build these things. I have visited the factory at Halfway where many of them were built. I also know about the Treaty of Rome and the requirements for such things, so perhaps you could try not talking down to people all the time. So I'll just humour you. If you can tell me the serial number of the dead weight tester and it's traceability back to the NPL I might even take you seriously. I assume that you are aware of BS4613 and BS 1780 Link to comment Share on other sites More sharing options...
Alcoblog Posted September 9, 2011 Share Posted September 9, 2011 Of course you did. I am fully aware of the fact that people build these things. I have visited the factory at Halfway where many of them were built. I also know about the Treaty of Rome and the requirements for such things, so perhaps you could try not talking down to people all the time. So I'll just humour you. If you can tell me the serial number of the dead weight tester and it's traceability back to the NPL I might even take you seriously. I assume that you are aware of BS4613 and BS 1780 Eeeek! ... I'm now hiding behind my chair! Big fight coming on ... I didn't realise tyre pressure gauges were so controversial ! Link to comment Share on other sites More sharing options...
Obelix Posted September 9, 2011 Share Posted September 9, 2011 Of course you did. I am fully aware of the fact that people build these things. I have visited the factory at Halfway where many of them were built. I also know about the Treaty of Rome and the requirements for such things, so perhaps you could try not talking down to people all the time. So I'll just humour you. If you can tell me the serial number of the dead weight tester and it's traceability back to the NPL I might even take you seriously. I assume that you are aware of BS4613 and BS 1780 Why on earth do you think I'd go to that trouble - it's not a product that I sell it's something that is built partly as a curiosity and partly to see how accurate I could make it. With a known mass from a balance and a acceleration it's easy to derive the force measured by a pressure sensor. Accuracy? With the mass used it's error is going to be within 0.01%, the inherent error in the sensor is about five times that. Drift rate in the electronics is less than 10ppm/year so you can derive it from that I'm sure. But is all this really worth it for you to try and get one over on someone? go on - off you see if you can dream up some more reasons to object to a free air machine as a loss leader. Link to comment Share on other sites More sharing options...
Obelix Posted September 9, 2011 Share Posted September 9, 2011 Eeeek! ... I'm now hiding behind my chair! Big fight coming on ... I didn't realise tyre pressure gauges were so controversial ! there not - just some person spoling for a fight because she simply doesn't like what someone else said. You get a lot of it on here. Link to comment Share on other sites More sharing options...
saxon51 Posted September 9, 2011 Share Posted September 9, 2011 Eeeek! ... I'm now hiding behind my chair! Big fight coming on ... I didn't realise tyre pressure gauges were so controversial ! Stop taking the PSI. Link to comment Share on other sites More sharing options...
Alcoblog Posted September 9, 2011 Share Posted September 9, 2011 Stop taking the PSI. I can't help it ... I'm feeling under pressure here and very tyred! Link to comment Share on other sites More sharing options...
Obelix Posted September 9, 2011 Share Posted September 9, 2011 I can't help it ... I'm feeling under pressure here and very tyred! :hihi: like it! Link to comment Share on other sites More sharing options...
saxon51 Posted September 9, 2011 Share Posted September 9, 2011 I can't help it ... I'm feeling under pressure here and very tyred! Goodyear innit!! Link to comment Share on other sites More sharing options...
5358darren Posted September 9, 2011 Share Posted September 9, 2011 It is amazing what people can be suckered into believing will make their car go better. what makes you say that, is a fact nitrogen is better than air in tyres so who's getting suckered?? Link to comment Share on other sites More sharing options...
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