I'm sure everybody knew this but me, but just in case you didn't here's a warning. When connecting an E-Meter RS-232 to any other device on the car that is chassis grounded be sure that you use an isolator that is not the B&B 9POP4 or any other supposed isolator with the following flaw. In this case the negative side of 12 volt supply to the isolator is connected to pin 5 of the DB-9 connector on the computer side i.e. The E-Meter side since it only takes data in one direction. The modem side is actually isolated but a lot of good that does since it's the E-Meter that needs protection.
There is apparently a 100 ohm resistor in the E-Meter between pin 1 of the main connector and pin 5 of the DB-9. This gets instantly fried as soon as it's hooked up to a chassis grounded pin 5 of the DB-9 when power is applied. If by chance it doesn't get instantly fried, it will when you start to run the car because of the inductive current induced. After 2 fried E-Meters, I won't be hooking up anything without checking the device against chassis ground. The E-Meters still works and actually transmits most data accurately to a laptop computer but the signal is too messed up, having no ground of its own, to work with anything else. Does anyone know where the resistor is that gets fried? I looked at the board carefully with a magnifying visor and couldn't find a trace. Rick Woodbury Phone: (509) 624-0762 President, Commuter Cars Corporation Toll-free: (800) 468-0944 Doubling the capacity of freeways Fax: (509) 624-1466 Quadrupling the capacity of parking Cellular: (509) 979-1815 Zero to 60 in under 4 seconds 715 E. Sprague Ave., Suite 114 Email: [EMAIL PROTECTED] Spokane, WA 99202 Web: http://www.commutercars.com
