Looks like BradM was on the money about MT. I called MT and they said they only teach their licensed people like my vendor.
We have over 200 scales, which are calibrated quarterly. From large floor scales to small table scales.
The info merrick65 provided looks great...I've downloaded the manual..probably take a couple days to go over it and I'll come back if I have more questions....Thanks!
Mettler is like a Roto Rooters. They have nation wide service network and their revenues from field serivce is significant They'll do nothing for you that will cause you to drop them. I think the service is where they make more money.
I'm a self trained tech engineer. A good start is to read and attend seminars about weighing uncertainties so you understand what it is you're adjusting. What many users understand is what idea scales will be, but they're far from it.
I have a handful of older Mettler laboratory balances and I've hit a road block already. In the process, I researched Mettler-Toledo and you'll see that they're like Roto-Rooters
The procedures in IES manual is a get-around method and it does not have the ability of factory procedures.
User calibration is all you can do.
If the corner load is off, mechanical adjustments are needed.
After these adjustments, it must be followed by temperature coefficient learning and linearization.
Even if corner load adjustment is not needed, a linearity calibration would be a good idea. These settings are made in the flash memory on the main board and the programming requires service program.
Since on a Mettler you can't get to linearity or temperature constants adjustments, if you adjust the corner load, you won't be able to adjust it back to original specs.
Ohaus has some of their products made by Mettler and have the same setup, but there are some models that let the user adjust linearity.