LTI 20-20 UltraLyte 100 Calibration checks
Discussion
If it is reading 0mph when it should be 0mph it is calculating the speed correctly.
One guy did question the accuracy of these devices, the prosecution tested the devive on a moving vehicle at over 100mph and the court accepted the results. He had to foot the bill. - http://www.bbc.co.uk/news/uk-wales-32733002
In using these guns for 6 years I would say they are 99% accurate. The 1% being when I drove off leaving one on the car roof which then fell off, hit the ground and knocked the alignment out so had to be sent back.
One guy did question the accuracy of these devices, the prosecution tested the devive on a moving vehicle at over 100mph and the court accepted the results. He had to foot the bill. - http://www.bbc.co.uk/news/uk-wales-32733002
In using these guns for 6 years I would say they are 99% accurate. The 1% being when I drove off leaving one on the car roof which then fell off, hit the ground and knocked the alignment out so had to be sent back.
HantsRat said:
In using these guns for 6 years I would say they are 99% accurate. The 1% being when I drove off leaving one on the car roof which then fell off, hit the ground and knocked the alignment out so had to be sent back.
The difficulty is that if you ask anyone who aims at a target, professionally or otherwise, whether they thought they hit it then the answer would be yes. Of course with a projectile, you can see where the projectile has hit.
On an enforcement video, you can see where the sights are just before the reading takes place. Without that, we just have to trust what the operator thinks they hit.
My issue is that human error must be there. Please take this in the positive way that this is intended in that I think you would be brave to suggest that over six years you have never succumbed to human error, or made a mistake.
HantsRat said:
If it is reading 0mph when it should be 0mph it is calculating the speed correctly.
At 0mph it is. What about 0+mph?
Your test of 0mph for a stationary object does not confirm accuracy of anything but 0mph. The difference between my car's speedo and GPS speed varies as speed increases.
Are you saying the manufacturer is incapable of confirming it's reading correct speeds in all circumstances?
mybrainhurts said:
HantsRat said:
If it is reading 0mph when it should be 0mph it is calculating the speed correctly.
At 0mph it is. What about 0+mph?
Your test of 0mph for a stationary object does not confirm accuracy of anything but 0mph. The difference between my car's speedo and GPS speed varies as speed increases.
Are you saying the manufacturer is incapable of confirming it's reading correct speeds in all circumstances?
For other doubters the range is of no consequence to accuracy in the speed.
tapereel said:
mybrainhurts said:
HantsRat said:
If it is reading 0mph when it should be 0mph it is calculating the speed correctly.
At 0mph it is. What about 0+mph?
Your test of 0mph for a stationary object does not confirm accuracy of anything but 0mph. The difference between my car's speedo and GPS speed varies as speed increases.
Are you saying the manufacturer is incapable of confirming it's reading correct speeds in all circumstances?
I'll try to understand it if you provide some more information.
tapereel said:
the device calculates all speeds in the same way so a 0mph test confirms the accuracy for the full range of speeds. As it happens a 0mph target is the most difficult for the device to measure...but as your brain is hurting trying to understand how it works you either won't believe what I have written or won't understand it.
For other doubters the range is of no consequence to accuracy in the speed.
I call bFor other doubters the range is of no consequence to accuracy in the speed.
ks on all of those statements I'm afraid.
JustinP1 said:
tapereel said:
the device calculates all speeds in the same way so a 0mph test confirms the accuracy for the full range of speeds. As it happens a 0mph target is the most difficult for the device to measure...but as your brain is hurting trying to understand how it works you either won't believe what I have written or won't understand it.
For other doubters the range is of no consequence to accuracy in the speed.
I call bFor other doubters the range is of no consequence to accuracy in the speed.
ks on all of those statements I'm afraid.ks so that's fine.tapereel said:
JustinP1 said:
tapereel said:
the device calculates all speeds in the same way so a 0mph test confirms the accuracy for the full range of speeds. As it happens a 0mph target is the most difficult for the device to measure...but as your brain is hurting trying to understand how it works you either won't believe what I have written or won't understand it.
For other doubters the range is of no consequence to accuracy in the speed.
I call bFor other doubters the range is of no consequence to accuracy in the speed.
ks on all of those statements I'm afraid.ks so that's fine.ks.mybrainhurts said:
tapereel said:
JustinP1 said:
tapereel said:
the device calculates all speeds in the same way so a 0mph test confirms the accuracy for the full range of speeds. As it happens a 0mph target is the most difficult for the device to measure...but as your brain is hurting trying to understand how it works you either won't believe what I have written or won't understand it.
For other doubters the range is of no consequence to accuracy in the speed.
I call bFor other doubters the range is of no consequence to accuracy in the speed.
ks on all of those statements I'm afraid.ks so that's fine.ks.t unless you can provide more info relating to laser calibrations.I work for a company that manufactures load measuring devices up to to 1500te. We carry out a yearly calibration on all of our customers equipment. When you switch the unit on it displays a zero load and we then calibrate the equipment so, for example, at 20te it reads 20te.
Now, if I was to switch the equipment on and it shows a zero reading there is no way on earth that I can be sure it will still read 20te under a load of 20te this is why most of our customers have a fixed known load (big block of concrete / metal) that they check the readings against further up the scale.
I will admit that 9 times out of 10 once the equipment is calibrated it rarely needs adjusted again year on year unless it has been mistreated, but still, how you can say that because the equipment reads zero at zero it will then read 70 at 70 is beyond me.
Happy to be proven otherwise though.
tapereel said:
JustinP1 said:
tapereel said:
the device calculates all speeds in the same way so a 0mph test confirms the accuracy for the full range of speeds. As it happens a 0mph target is the most difficult for the device to measure...but as your brain is hurting trying to understand how it works you either won't believe what I have written or won't understand it.
For other doubters the range is of no consequence to accuracy in the speed.
I call bFor other doubters the range is of no consequence to accuracy in the speed.
ks on all of those statements I'm afraid.ks so that's fine.If you know so much it shouldn't be hard for you to explain how this all works. It's hardly giving away state secrets is it?
HantsRat said:
Congrats!
Do let us know full details. Interested to know what the error was.
Very QuicklyDo let us know full details. Interested to know what the error was.
1. The speed not being written on the ticket
2. No offence, but two absolutely useless Police Officers who clearly had little court experience, ably assisted by an equally useless CPS rep.
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