SM vs PL High Gear 02 Readings

[Scoobum]

Recall on SM tonite showed 823...while PL checked in at 803. Any reason for the difference?

[Steve Wood]

probably something to do with the sampling rate

[Scoobum]

Thanks Steve

[Shimy87]

when I'm tuning mine seldom show the same numbers either?

[Scoobum]

when I'm tuning mine seldom show the same numbers either?

Steve explained it in another thread. The ALDL port samples at 1.5 times per second...while PL is 5 times per second. I hit recall on the SM at the end of a run for KR...but I use PL for 02's in regard to tuning.

[Steve Wood]

when I'm tuning mine seldom show the same numbers either?

Steve explained it in another thread. The ALDL port samples at 1.5 times per second...while PL is 5 times per second. I hit recall on the SM at the end of a run for KR...but I use PL for 02's in regard to tuning.

Let me rephrase that.  The ALDL port updates the SM approximately once every 1.5 seconds.  The PL updates a bit over 22 times per second.  The SM when connected to the PL instead of the ALDL port, updates 5 times per second.  Bob chose that rate because the eye has a hard time seeing change faster than that.