I also posted this in the Epson 6500 calibration guide.
I just got a PRO1 meter and wanted to see how my LT compared to it. Here's what I did:
1) Selected High lamp, Natural setting on my 6500UB
2) Calibrated using the LT and Dan's 75% sat method
3) Checked the calibration with the PRO1 (files attached "Nat High 230 hrs PRO1 reading of LT cal.zip").
4) Recalibrated using PRO1 (Files attached "Nat High 230 hrs. PRO1 cal.zip").
5) Offset LT against PRO1 (Files attached "PRO1 to LT offset.zip")
6) Checked PRO1 cal with the LT offset (Files attached "Nat High 230 hrs LT offset of PRO1 cal.zip").
All went well and the LT offset of the PRO1 cal seems to match quite well.
The problem is that I did a calibration of dynamic low lamp with the PRO1 and then checked it with the LT offset, and they were not close at all.
I may not understand how an offset works. It looks like I need to create a new offset matrix for the different lamp and preset modes of the projector. Does this make sense? I was under the impression that an offset would be valid regardless of the number of lumens or preset, but maybe because the 6500 moves a lense out of the light path for dynamic that this messes up the offset.
Thoughts/comments on the calibrations and the offset problem would be greatly appreciated.
I plan on doing a dynamic calibration with the PRO1 and then creating a new offset matrix for the LT and checking that against the PRO1 to see if it works.
One final question: When I set up the various meters, I put up a 100% window to get the max Y reading. I then took the RGBW 75% stim windows. Since the meters mounted differently on my tripod I thought it was best to center them before the readings. Is this correct?
Nat High 230 hrs PRO1 readings of LT cal.zip 414.755859375k . file
Nat High 230 hrs PRO1 cal.zip 435.1220703125k . file
PRO1 to LT offset.zip 9.8916015625k . file
Nat High 230 hrs LT offset measure of PRO1 cal.zip 383.298828125k . file