Hmm.. I tried using the HPT canned PID for the LM-1 and couldn't get the LM-1 screen to match what HPT was showing.
I finally did 0-5v, 10-18 AFR in LMProgrammer on Analog 2 out, then created a PID in HPT with volts/.625 +9.68. When I set the voltage in LMProgrammer to 2.5, HPT read 14.0 only when I had the 9.68 in there, not 10. Then I programmed it to 0-0volts, and HPT should have reported near 10 AFR, but it was 9 something. I'm afraid I'm only accurate near stoich. Is it because when you set it to 0 volts, your seeing the voltage of the MPVI? I guess I should check 5-5volts and see if it shows 18 AFR in HPT?