In that same vein, my electronics lab had several features I added after working on OH and CH downhole tools. Fashioned a Deadman Pedal that had to keep pressed to energize tool with 200-400vdc @ 2-5amps from a Sorensen supply.
Not quite related but shows spontaneous hazards... The tools would sometimes leak but not quite flood. Normally is just a PITA to clean up. Then I ran into my first Salt Water Saturation tool (used a 40curie Cesium source) that had H2S inside. Knocked me on the floor and was unconscious for several minutes. Regained consciousness in the back of an ambulance.
Answer to that scenario was a klaxon wired to 30sec delay. Would turn it on when opening all tools coming back from sour wells. If reset wasn't hit after 30 seconds, sonalert would fire for 15 seconds, if that timer expired, very loud and irritating klaxon would sound off. All in shop trained what that sound meant, and would respond in SCBA (no 'U') gear. Needed that response twice.
My battery Tek TDS2024 scope was a strange bird. No idea what option (attached to front) it had, but it had an input tolerance to 10kvpk with Tek probes, 1000vpk using typical X1/X10/X100 probes. Burned up so many Tek probes while probing HV that ended up buying by the dozen. Of course, this was when running on battery. Plugged in, I think was derated to 600vrms or similar. Spare batteries littered my lab.
Incidentally, burned up the GPIB on day 2 due to static discharge, I think.
Sign on exterior door " Danger! 10,000 ohms in use" kept a lot of looky-loos out. The braver visitors were usually turned back an over-driven GM tube. That just plain went *NUTS* several days after Fukushima!
~SD
