The equipment is a Gretag MacBeth Spectrolino using Profile Maker 5. Is everyone out there setting their gamma at 2.2? Jim
No, I actually set mine to L* but that's closer to 2.2 than 1.8. Certainly, you'll have a hard time getting the screens to match if you're not using the same settings.
Have you absolutely determined the Spectrolino is not operating correctly? Do you have access to any other spectros or colorimeters to verify your results? If you're in the market for a new device, you may consider investigating other applications. FWIW, I've not had much luck with Profilemaker and screen profiling. I love it for printer profiling, but have chosen a different application to manage my screens.