Track furnace duty cycles?

With a time monitor on each valve, blower, etc., as needed. This could be separate hour meters on each device (designed for the device voltage - 24V,

120V, etc.) or a chart recorder with appropriate interfaces or the electronic equivalent of a chart recorder (using analog to digital converters to convert AC on/off into a logic signal).

Dataq

has a number of electronic chart recorder equivalents, including the DI-194RS starter kit (4 channels, PC serial port interface, basic monitoring software) for $25. If you're interested in an electronic monitor, this is a good way to start.

John

More about me:

VB3/VB6/C/PowerBasic source code: Freeware for the Palm with NS Basic source code: Drivers for Pablo graphics tablet and JamCam cameras: johnecarter at@at mindspring dot.dot com. Fix the obvious to reply by email.