Here is a little group of my results with the 5970 Kal. Most of the time I was at or around 1280 to 1315mv for these clocks. Hope this gives you a reference point or two.
GL mate
3dm03.146523.5970wm.jpg
3dm05.43640.5970wm.jpg
3dm06.33095.5970wm.jpg
3dmV28461.5970wm.jpg
aqm3.365994.5970wm.jpg