Typically E-Beam power supplies driving electron guns. Applications today include; XRay imaging, Sterilization, Semiconductor fabrication, and a few defense related applications
Current from these supplies are typically in the 80-120mA range- for the HV section of the supply. There are numerous other ancillary supplies to support the gun (filament, grid etc) and host system.
I’ve never seen a Cart “Guy” selling drinks on the golf course. And most courses around here try to hire young pretty girls (many are still in high-school). And I find it disgusting all the number of guys my age hitting on these girls. This one guy in my golf league is 74yo, 5’10, 330lbs, balding, Married with 3 kids and a few grand-kids and he’s ALWAYS hitting on the Cart Girl. As if he has a snowballs chance in ■■■■. He does buy a lot of drinks from them over the season.
Back in the 70s there was an Australian waitress with a strong accent. One day she came into my place of business, we were talking, I asked her what happened to her accent. She told me she only used it at the club, got higher tips.
I was golfing near Cocoa Beach, Fl one morning. Four of us went out early and the refreshment cart came by. One of our group bought a ■■■■ and downed it quickly. We came across the same cart, operated by a man, and our friend got another ■■■■. He downed that one fast too. This happened a couple more times. Well before the 9th hole he made a bee line for the woods. He threw up everything. Hard to believe that he was swilling ■■■■ in the course at 8am.
Yes, but there are still a number of older meters floating around that may not meet the CAT III requirements we recommend for current HV situations.
But leads are wear items and get replaced several times over the life of a meter. More than once I’ve been chasing an open circuit to find the open was actually in my test lead. Make sure the replacement leads are as good as the meter.
Yes.
Yes. That’s why it’s the expensive impact, because it will survive that kind of use. Look, let’s say I’m doing something quick like a water pump on an LS engine. I use my 3/8 air or cordless ratchet to remove the 6 bolts, yet the water pump is still stuck to the block. Do I put my ratchet down and go get a small hammer or prybar? No, I smack the pump with the ratchet that’s already in my hand.
Yes, but it has still taken a tumble from 6 feet high to the ground, had a hood close on it, been left out in the rain, etc. Things happen in a production environment.
Even today the majority of auto techs are still only familiar with 12V DC systems. They’re more likely to be around high voltage while doing work around their homes than they are at their jobs. Some are too scared of high voltage, some aren’t scared enough. Safety has come a long way in the last couple of decades. It’s fairly common now to require techs to wear lineman’s gloves while “pulling the plug” on a live HV system. When I went through my first round of hybrid/HV training 25 years ago, the procedure was to put your left hand in your pocket and use your right hand only to avoid current flowing across your chest and stopping your heart.
That’s funny, cause one of the things I always said was to test your test light before checking fuses etc, and test your DVOM to make sure it is reading, for 12V DC, put both leads on the battery post to make sure it reads B voltage, checking ohms, touch the leads 1st thing to make sure it reads accordingly…
I used to zip off the wheels on one side (or calipers or whatever) and let the 1/2" impact slide down while gripping the hose and sling it to the other side of the vehicle all in one motion, rather on a lift or working off jack stands, yeah it has scrape marks, I would also pull it across the floor by the hose back to me if/when needed…, been known to do that with the 3/8" air ratchets also…
Heh, I worked third shift while in the Philippines. Sometimes we would head over to either the Airman’s Club or NCO club after work, the bars were open for hard liquor drinks at 7AM. Sometime in the 70s the Air Force decided to “ deglamorize alcohol, drinks could not be served until after 4PM.
Perhaps my example of an impact wrench wasn’t a good comparison. Some tools are designed to withstand harsher treatment. What I was getting at is purposeful abuse or just not caring enough to take care of something. I skid my stuff around too and sometimes things fall. But I don’t do that purposefully. I wouldn’t treat a meter in the same way I would a hard tool for example.
My good fluke meters have a rubberized outer shell so they can withstand a lot of shock and not damage the instrument. But I wouldn’t press my luck and wing them around and I still wince if they happen to fall.
That’s why the case is designed in a way to allow the meter to withstand a 100G 1/2 sine wave impact There are standard shock and vibe tests for everything. It’s meant to withstand an occasional mishap but not willful abuse.
We build some large equipment where I work. We also supply all the tools people need to do their jobs. If someone was observed mistreating those tools, they would receive a warning about it. Consistent mistreatment would be cause for termination. You bust up your own tools? That gets expensive and you either wise up and exercise more care or you might go broke replacing them…
That reminds me of one time my Snap on dealer told me my very large flat blade screw driver was not a prybar, I said then what else can you use a screw driver that size for in an automotive application, he replaced that blade so many times he finally had to replace the handle…
Should have seen the look on my Mac dealers face when I handed him my large (at the time) prybar that I broke the tip off on…
But for the most part, I take very good care of my tools and some still look almost new after 35 years of use…
I certainly do that before using any piece of test equipment. But meter leads can fail intermittently. I was tracing a circuit, I had 12V at point A, 12V at point B, and 0V at point C. Simple open between B and C. Checked point C 5 minutes later and had 12V. Intermittent bad connection in the car? No, my meter lead was open, but only when pulling on the damaged section. It’s a good idea to periodically give your test leads a gentle tug.
I buy the best hand and air tools I can and use them hard. Once my Snap-On dealer looked at my beat up air ratchet and asked when I was going to buy a new one. He looked at the date code and told me it was over 20 years old. Still worked great, never even needed a rebuild kit. I lubed the head and oiled it regularly. It also got dropped in coolant or oil, used as a hammer or breaker bar, got in the way of a torch, etc. and never failed. Sure, it was an expensive purchase–I think it was $300 back in 1996 or so. But if I think about it taking 25 years of use and abuse, I will say the price was high but the cost was low.
I would never have used an Astro or Chicago Pneumatic air ratchet that hard.
I still have the Snap-On 3/8 flex head ratchet I bought in 1993.
Same, but the broke neck (flex head) just flops now, but still works very well…
I also had a 800 pound tire fall on it and then the 20,000 pound forklift (Lull 844 IIRC) fall over on it, got the forklift back up but had to drag the 800 pound tire (foam filled) out from under the forklift while still on the ratchet, now the ratchet has scrape marks on it but didn’t hurt it… Well worth the money way back when…
BTW foam filling a tire make a normal wheelbarrow tire weigh about 50 pounds… lol.. The Lull 1044 wheel/tire weighed 1,200 pounds (each) after foam filling…
I have a buddy that was a diesel mechanic and worked on fleet trucks/trailers. He had some of the largest wrenches I ever saw at his work. I joked that you could unbolt light poles with those tools. At home he had a lot of similar stuff but not quite as huge.
This guy is huge himself and quite intimidating looking albeit actually a very nice guy. At one point he bent this huge wrench using it as a pry bar. It was a Sears wrench and we made a detour for him to go exchange it under their generous policy back in the day
So this big dude has a patch on his eye from some debris that got in there. We got him all fired up on the way there, telling him they would probably deny the exchange since it was obvious case of tool abuse. He goes in with a big chip on his shoulder ready for a fight. Of course, we are all in tow behind him wanting to see what transpired.
He marches in there and behind the register is this pimply faced kid watching this hulk dude coming straight at him. “Can I help you sir?”
“This wrench is defective!” and he holds up this ginormous wrench that is twisted out of shape.
The kid looks at the bent up wrench, then at my huge buddy with the eye patch and a scowl on his face and says “Yes Sir!! Let me go get you a new one”.