RFL 505 Gaussmeter Notes

I have a RFL505 Gaussmeter.  The calibrate mode wasn't working initially but this was just due to dirty switches.

I checked the calibration by building a small Helmholtz coil running at 1A and generating around 40 Gauss.  I discovered that my probe was a x10 probe, meaning the most sensitive range on this meter is 500 Gauss.

Here are some notes in case anyone else is working on one of these:-

https://drive.google.com/file/d/1DhvNSDjCZfwB-D-KHEGmuBReMH-8cX2e/view?usp=sharing