OVLOV JAY:
Unstitched because you say the tacho calibration is the most accurate, totally dismissing people saying 56 on the head is 54 on the gps, then you’re saying it’s doing 56, while another truck is also doing 56 while passing it, often at a considerable difference. You can’t have your cake and eat it norb, only one can be doing 56. The truck going slower has not been set up properly, it’s not rocket science. I’ve took trucks in for calibration on the normal drive tyres, and it’s come away 3 mph quicker than it went in. So why is it not possible to be under, even though you say there is a speed range tolerance?
So what am I supposed to do when someone says the sat nav says 54 when the tacho says 56 ■■?..Again I will say the tacho rollers are the calibrated approved method ,sat navs are not approved …I a not dismissing people ,I know what happens ,as I said my car is the same …Though you never answer any questions I put …
So again my question to you is .customer states his sat nav reads slower than the tacho,what do I do ?Do I recalibrate it at his expense to find it still reads different to the sat nav ■■? Or do you expect me to manually enter a K W factor that has them reading the same ■■? I will point out the last option will never happen…May be you should contact the authorities and explain how the tacho never tallys up with the sat nav…Other posters have pointed out that sat navs are not accurate and why
I know how the calibration process works. If I was an owner driver I would ask for recalibration. A miscalibrated tacho will give corrupt mileage readings and incorrect fuel consumption figures. We had 15 trucks calibrated at mc in hythe, and all were 3 mph out. Each one redone at Thurrock. Turns out the rollers were out of calibration. As you will know, if the rollers not set up properly the truck can’t be either. I’m not going to fall out about it, I just didn’t like the dismissive nature that the rollers are never wrong. Maybe it’s why a lot of calibrators choose the over tolerance, meaning a lottery if the rollers are out and the truck does the correct speed, or the rollers are bang on and the truck ends up a flying machine
I never meant to make it sound that the rollers are never wrong …Maybe it sounded that way because I was using facts ,as the rollers etc are all in calibration and working correctly…I did say if your rollers are out of cal then you have to do the manual method ,which I dread to think what kind of calibration you would up with
Unfortunately sometimes when typing things never come across as intended,different people take the info differently…
Like I said I’m not going to fall out about it, I’m of an age where sticks and stones apply, I just love a good debate, it’s the only reason I come on here. And don’t get me started on context of type, it’s a nightmare. You can say it in your head 3 times in different stiles and get different contexts
All car speedometers over read because the manufacturing law states that they must not under read. It also helps their 0 to 60 mph times too. I generally get a different unit every day and the accuracy between them according to what my sat nav reads is wildly different.
The company I used to work for had a fleet of new to two year old trucks, and with the tacho showing 90 kph would show 55mph on my sat nav and other trucks from the same manufacturer and serviced at the same dealer would creep past on the limiter.
