Model 73PO14. Just picked this up (cheap). But with no manuals and none to be found via Google.
I'll have to pick up some Type J thermocouple wire and goof around with it. In the mean time, has anyone here had any expreience with one of these (or something similar) and know what the knobs do? Calibration procedures?
There's a photo of it posted on on alt.binaries.schematics.electronic.