I know there’s at least a few of you who use the old pin-type meters, I just saw Christian B. pull his out in his most recent webinar. I thought I’d give one a shot, so I went on Ebay and picked up a Delmhorst J-1. However, there’s no manual or info that I can find on how to adjust (I assume calibration is a different thing done at the factory) the meter to give accurate results. Can anyone help steer me in the right direction?