After a little more digging, I learned the device is basically a data logger attached to the OBD-II diagnostics port. The data supplied is all metric, but coded for efficient packing in binary. To provide Customary data for US customers, they had to convert it all. I wonder if they skip the conversion step for metric, or reconvert the Customary back to metric.
Wikipedia gives a fair (and free) summary of SAE J1979 and the parameter IDs that may be requested. OBD-II answers back with one or more bytes of binary data that must be converted to decimal SI data by the indicated formula. http://en.wikipedia.org/wiki/OBD-II_PIDs ________________________________ From: John M. Steele <[email protected]> To: U.S. Metric Association <[email protected]> Sent: Saturday, January 4, 2014 5:43 AM Subject: [USMA:53483] RE: Fleet Genius Pro management software now supports metric system | Technology content from Fleet Owner Another version of the press release shows some screen shots, and it uses km/L; however, it mis-symbolizes as KPL. It also showed examples of maximum speed and average speed etc to demonstrate safety features. As the maximum speed was in excess of 150 km/h(156?) and mis-symbolized as KPH, I concluded they don't understand metric very well and chose not to post the article. I found a link to that other article, but it may not be working. My browser can't reload the page: http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=newssearch&cd=2&cad=rja&ved=0CC0QqQIoADAB&url=http%3A%2F%2Fwww.prweb.com%2Freleases%2F2013%2F12%2Fprweb11450702.htm&ei=CeXHUrjYK8qwygGE04DICw&usg=AFQjCNGe4dRq_GMG8HNxjp_iw7qtjMrluQ&sig2=68UAzIzFwqUpUUyvAKPYsw ________________________________ From: Martin Vlietstra <[email protected]> To: U.S. Metric Association <[email protected]> Sent: Saturday, January 4, 2014 2:50 AM Subject: [USMA:53482] RE: Fleet Genius Pro management software now supports metric system | Technology content from Fleet Owner Does the package use L/100 km or km/L when displaying fuel consumption? I know that the European convention of L/100 km is not popular everywhere, but to the commercial user, it is the most sensible. A trucking manager might well look at his costs as follows (the actual figures are total works of fiction on my part): Amortistaion - 75c / km Tyres - 55c km Fuel - 121c / km Labour - 132c / km If he calculated his fuel costs in L/100 km, then he need only multiply the cost of fuel (in $/L) by his consumption to get the price in cents per kilometre. If he used L/km, he would have to use division rather than multiplication to get his answer. In IT, multiplication is always preferred to division because firstly one will never come across the "divide by zero" problem and secondly A*B is identical to B*A, but A/B does not equal B/A. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Metric Rules Info Sent: 03 January 2014 21:28 To: U.S. Metric Association Subject: [USMA:53481] Fleet Genius Pro management software now supports metric system | Technology content from Fleet Owner http://m.fleetowner.com/technology/fleet-genius-pro-management-software-now- supports-metric-system Sent from my iPhone
