Electrical Safety Analyzers and Testing Procedure for NFPA99 with Fluke ESA 609
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- Опубліковано 12 лип 2024
- This video briefly covers different electrical safety analyzers used for biomedical engineering technology, aka as BMET, aka healthcare technology management.
We cover the basics of the testing Procedure for NFPA99 using a Fluke ESA 609. Topics include mains testing, ground resistance test, and touch current test (enclosure/chassis leakage).
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I had a 612 and loved it. Failed cal and it was no-longer supported by Fluke, so I ended up with a 609. This gave me the big sads. I would love my 612 back. The ESA609 definitely seems to have much less stable resistance readings.
Thanks for providing value sir👍 great help
Excellent!!!
Good one and keep it up. More videos on EST. Specially with fluke 612..
Thanks! Yeah I have one recorded - but this video got so long I decided to split up the content and process one at a time - need to get some free time to process the 612 video. Thanks again!
Also - I should have mentioned that it is also part of the standard to test touch current with the ground wire intact (no fault condition) and the current should be under 100 microamps. In accordance with standard-10.3.6.4 Also check out some of my favorite Fluke Products!
Voltage Detector - amzn.to/3rfapv9
Fluke Multimeter and Clamp Combo Kit - amzn.to/3xddAax
Fluke VT04A Infrared Imager - amzn.to/3E866Y1
I have always wondered about the DUT Power Off leakage test and I wonder if it pertains to devices with soft switch power buttons...
Yeah that could be - just to verify the device can be shutoff properly may be a needed safety check (so that power can be turned of in case of an emergency) - just seems odd to check leakage current
I have seen mainly in power supplies, some capacitor drain circuits get energized in order to drain the caps. maybe that is why you got to do the leakage test when unit is powered off.
That is a good point, I just struggle to see how the leakage current could be higher than when the device is on (when testing in the off position). But from a troubleshooting perspective I can see some value.
@@HTMWorkshop I thinking there is a difference between when device is ON / Device is turn off / Caps are draining / Caps are drained and unit is de energized. depending on the result it may be telling us something. perhaps time to dust or clean the boards, helps PM services.
Can you provide any insight on how to do an EST on a piece of equipment that is drawing up to 50 amps? I've not been able to find a safety analyzer that can do that.
Interested in the issue you have with zeroing the Ohms on the 609. I have the same issue with mine as I am doing some evaluation between a 612 and a 609 for earth resistance measurements. My 612 gives repeatable results consistent with my 10 Amp earth tester. the 609 seems to give pretty random results even when as you showed a short lead is connected.
Yeah I have seen that - but I am not sure why. I suspect that the ground prong receptacle contact wears down (loses retention force maybe) after repeated use (since you use that receptacle for the medical device and to zero the leads). As opposed to the 612 which has a dedicated ground equipotential point - just a theory.
thank you. its been a long while. needed to refresh. I got to go tomorrow check out multiple patient chairs that are causing the GFI plug to pop intermittent. chairs are all on different breakers (do I need to say different gfi plug?). they are made in china. no parts available no tech service or support, no OEM contact info LOL, But they are a good source of income for me, LOL. they work fine every time I been there. so I will take the 609 there tomorrow.
Strange - Im surprised they were even using GFCI in the first place. Yeah better safe than sorry - I guess you can see if you can replicate the issue and find the root cause. Goodluck!
@@HTMWorkshop thanks for taking the time to reply.
I asked a friend contractor who builds clinics. he said he never installed GFCI for chairs or tables.
but these are Chinese chairs, sold for 1/6 the price of the cheapest domestic. here is the catch, you can never find parts for them.
any way my measurement I think eliminated the chairs & units to be the cause of the GFI popping.
current leak was low,
1st chair 1 micro amp.
2nd chair 30 micro amp.
but the chassis resistance was hi I think.
1st chair 1.86 ohms. (I noticed on this chair gnd goes through a circuit first before connecting to the body).
2nd chair 0.370 ohms.
I told them they might want to replace the GFCI and don't use GFCI plugs. before that though get the gnd chassis to a lower resistance.
@@bobbauvian7700 @Bob Bauvian Yeah could definitely be bad GFCI's. I agree there is no reason to have GFCI's just for those chairs. Did you see any power strips being used? With the leakage currents being that low it should not be setting of the GFCI - did you make sure to check in reverse polarity? I am wondering if any of the outlets may be reversed and causing an issue.
@@HTMWorkshop well guess what. I am dealing with a bunch of pin pushers who don't know their head from their behind.
1st She did not see the value of doing an electrical safety test. I was scowled cuz I spent time doing it, stating "we didn't ask you for that why did you do it.".
then when I tried to explain to them why. I was cut short. and now they have another technician doing their work. lol.
the funny thing is I have seen the other tech's work. burnt wires due to loose wire nuts is a common thing, on his installations..
same thing happened to me in 2009 when I spend over 10K on a T400 flir. non of my customers saw the value in it.
it just made me diagnose much faster which would cut my labor time hence my fee. so now I just dedicate it for work in the shop only.
PIn pushers
@@bobbauvian7700 Yeah it can definitely be a challenge to explain the value of the work to people without experience in the field - often times the long term returns/savings will be what justify the work and a lot of people just care for the the short term. Goodluck!
only time i see leakage current higher when the device is off is in some bairhugger patient warmers
Very interesting! Good to know there are some instances for the process - Thanks for sharing : )
It’s not a patched cord. It’s a ferrite bead for HF filtering….
Yes you are correct - I was not even thinking about that at the time - but you are absolutely right.
If the device under test has a plastic chassis and no ground terminal for testing or other conductive surface is there another process I should do for chassis leakage and other tests? Thanks!
There are two schools of thought on this - and depends a bit on where you are and who you are
1) No testing required for double insulated device (which this should be if there is no ground/equipotential point.
2) You use conductive foil to create a contact point - the foil will show you how much capacitive leakage current is flowing. I think it's 10cm by 10cm of foil but I honestly can't remember.
I have not heard of anyone actually doing the foil method - but I have seen it recommended by testing companies.
Can ESA 609 measure insulation resistance?
I have not personally used it for that - I don't think its marketed - so I think its a no but can't say I have ever tried
Speak UP!
? - I could be missing something but the audio comes in pretty clear.
@@HTMWorkshop At times it dies off and becomes inaudible.
@@flycastfish timestamps?
@@HTMWorkshop :40>47
@@flycastfish I do see a point at 3:30 where it goes down but still pretty audible on my end (maybe you are on a cell phone and the audio does not come through as well ...just a guess)