Some of you may remember the somewhat crushed Solartron 7075 which I repaired a while back.
After being taken care of in a nice equipment friendly apartment instead of being neglected in a pile of scrap in an outdoor shipping container, the meter is now showing the kind of stability you'd expect. If I warm it up and then connect it to my Weston cell, the reading is rock solid. In 6x9 mode with 10s integration time, it varies no more than +/- 1μV as long as the room temperature is stable.
So it was opportune that I saw another tip here on the forum, this time about a small Swedish calibration lab. Consequently, the 7075 and I will be taking the ferry over to Gotland at the end of February for a few days.
Not calibrating such a stable and well aged meter was such a waste, but until now, the only calibration places I could find here in Sweden didn't even want to know if you were a private person. The place I found on Gotland is called Nanocal and the guy who runs it (Kjell) is really helpful and quoted me a price which was actually no more than I paid for the meter.
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Seeing as he's also nice enough to let me be there with him while he works on the meter also gives me the golden opportunity to stuff my bag with as many precision resistors and voltage standards as I can manage and get them on his Fluke 8508A and HP 3458A.
It's not every day you get the chance to put your references on a cal lab's 8.5 digit meters!
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Shipping the meter over with a courier crossed my mind for about a tenth of a second. Subjecting a stable and sensitive meter to the mechanical violence from a courier, and particularly the extremes of temperature, would have made calibrating it a pointless exercise. And anyway, it will be nice to have some time to look around Visby a bit before it fills with tourists.