[Bill Grubbs]

Does the O2 always drop off at the same point prior to the end of recording?

Are you using a switch panel, or a stock key switch?

Are the O2 heater wires wired through the switch? The wires that power the heaters should be connected to a buss or "hot" stud. the heaters are turned on by the "black box when it receives power; not when the record button is pushed.

Are you using relays on any wires?

Any circuit breakers?

It really sounds like the "Black Box" and maybe more are loosing power from a bad connection/switch/relay/wire.

I did have a friend recently track the same problem down to a bad main cable. He swapped in a spare cable and all was right in the universe again. this is the only instance I know of or even heard of where this was the problem. RP just makes a great product.

Any problems I have had have been due self induced programing issues, or sensors themselves going bad.

Sensors will occasionally go bad (4 sensors in 15 years) but I consider them to be expendable for our applications.

If you wish to discuss this quicker give me a call @ 716.nine.nine.seven.916oh

Bill