Calibration error DU 640
I'm trying to calibrate, and an error message pops up saying it failed "zero order". What does that mean?
I've been seeing this on my DU650. It could mean the UV lamp is old and not getting enough power so the cal sequence can't find the peaks. In my case I seem to have a bad "purple" filter (partly frosted) on the filter wheel which causes the same thing. See my other post for interesting other things like melted goo on the mainbaord.
Zero order is white light. If it happens when you are calibrating then replace the UV lamp. If it is happening during the initial start up then it is probably the visible lamp.
I think the wavelength calibration is only using the 656.1nm peak from the UV deuterium lamp, so why would the white lamp come into play?
I mis-spoke a little bit, I'll blame it on a long day.
When you do a calibration, the first thing it does is go to 0nm (white light), if it can't find it or if it is dim you will get the Zero Order error.
I would start by replacing the visible lamp and peaking it.