What happens with the E-meter/etc if you limit the available current, say to 10-20ma? Will it retain accumulated amphours? Counting function? No display until xx ma?
-Chris On July 27, 2015 5:56:16 PM CDT, Lee Hart via EV <[email protected]> wrote: >Cor van de Water via EV wrote: >> Lee, Thanks for setting me straight that the backlight draws so much >> power that it is better not to use a zener. > >The older E-meter/Link-10 had LED displays. They drew more current. The > >later LinkPro/LinkPro-Lite has an LCD display with LED backlight. These > >draw less, but the backlight is still a power hog and takes about 30ma >at full brightness. The measurement electronics adds an additional >10-20ma depending on what it is doing at the moment. > >> An ordinary buck >> converter can be OK if both the meter power and measurements are >> connected only to the pack, since then no chassis connection exists. > >Sure; that's fine if you don't mind the continuous supply current. It's > >not a problem in an EV that's driven (and charged) regularly. The >problem comes if you park the EV for months, and forget to disconnect >the meter and don't have some kind of charger connected. > >> Do you know if the meter can be powered off when the car is not used >> without losing its memory? > >Yes, they have an EEPROM that retains setup information. But it will >reset the accumulated amphours to zero. > >-- >Pollution is nothing but the resources we are not harvesting. We >allow them to disperse because we've been ignorant of their value. > -- R. Buckminster Fuller >-- >Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com >_______________________________________________ >UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >http://lists.evdl.org/listinfo.cgi/ev-evdl.org >For EV drag racing discussion, please use NEDRA >(http://groups.yahoo.com/group/NEDRA) -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150727/6c5d0d3a/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
