There are some specialist environments that utilise higher frequencies, but tend to be apparatus specific. Avionics on aircraft have traditionally used 400Hz supplies. I have also come across 400Hz for pilot exciters on brushless generator designs. The higher frequencies reduce the sizing of the magnetic components. Some construction concrete wackers / vibrators use a low voltage 200Hz supply to generator the best frequencies to move the concrete. Probably a load more out there that I have not come across. Thanks for watching and commenting.
Who really needs a CD-Rom I mean its completely redundant. What are the CAT ratings in the leads and croc clips. Do you have any tips for for high quality large, medium and small croc clips at least CAT IV 600v rated? Clamp meter is pretty decent. Great video again envious of all your testing tools wondering whether you do your own calibration for your tools it’s an area of cost which really should be addressed.
Yeah, certainly not much use with modern computers, but then again I have had a lot of problems sourcing software for Uni-T meters from their website. The clamp meter is ok when you get used to it quirks, specially for the price. For my work I tend to get lead and large crocodile clip sets from either Megger or Fluke. Fluke just have the one large size (TLK1550-RTLC) Megger have three different sizes. For more standard sizes that are compatible with 4mm safety leads I guess the Fluke SureGrip ones are pretty good. TETC did a comparison video a while back on some crocodile clips, may be worth digging out if you haven't seen it. With regard to calibration, I do some of mine own and some I send away. I have two high spec instruments that I send out for UKAS calibration, that is the UK standard for traceable calibration to national standards. I then use these to check out some of my own instrumentation. There are issues doing this though, to purely check another instrument is reasonably easy but is time consuming. Adjustment is a different ball game, you then need a stable test environment at the specified test temperature. You can also not always get the actual calibration adjustment procedure for the instrument, some such as Fluke, Keysight, they are readily available, Megger and Chauvin Arnoux are not. There is also an issue with the time it takes, I do not have automated test setups, so am way slower that a proper lab. For the Omicron you see, it takes me around a full day to check it out, that is quite a bit at my hourly rate and sometimes it is just more cost efficient to send them away. It also depends on your client, some will not like an instrument that is internally calibrated and you need a third party calibration to keep them happy. Cheers for watching.
@@three-phase562 Thankyou for this details as always I have yet to see anyone go into the level of detail you do. It’s amazing and feeds my own OCD. I have been interested in getting some high quality power quality test tool analysis I like the dranetz hdpq explorer series they are owned by gossen mettrawatt (and same equipment are branded as G&M in Europe) but it has its limitations on the frequency range its good for single and 3-phase stuff but not great oscilloscope quality. The other option is to get a very high end Keysight oscilloscope and try to live with its built in power quality functions. Either way I would still need to code/program higher end power quality metrics based around wavelet, multi resolution and other multi Fourier integral series type analysis with cross spectral analysis to track/monitor and map by co-linking different signals. Taking me back 20 years with my PhD when I used these techniques with very different types of data (financial and economic). Choices are always a compromise. I think I will just take two separate tool and utilize them for what they are really good at having the two tools gives a better choice but a much bigger cost😭☹️
@@mathman0101 Whilst I really do like the Fluke leads, they are rather expensive for what they are. I've fairly recently bought this set which works well for my use: uk.rs-online.com/web/p/multimeter-test-leads/1253735/ The one criticism I have is that the right angle plugs don't sit tight to the meter, they stick out further than I'm used to. The leads are at least as flexible as my Fluke ones, and I prefer the hook-grabber things to the retractable claw grabber things that Fluke uses.
Great review, thank you for your time.
I have a question about frequency's higher than 60hz, are there equipement who use power at those frequency's ?
There are some specialist environments that utilise higher frequencies, but tend to be apparatus specific. Avionics on aircraft have traditionally used 400Hz supplies. I have also come across 400Hz for pilot exciters on brushless generator designs. The higher frequencies reduce the sizing of the magnetic components. Some construction concrete wackers / vibrators use a low voltage 200Hz supply to generator the best frequencies to move the concrete. Probably a load more out there that I have not come across.
Thanks for watching and commenting.
Who really needs a CD-Rom I mean its completely redundant. What are the CAT ratings in the leads and croc clips. Do you have any tips for for high quality large, medium and small croc clips at least CAT IV 600v rated?
Clamp meter is pretty decent. Great video again envious of all your testing tools wondering whether you do your own calibration for your tools it’s an area of cost which really should be addressed.
Yeah, certainly not much use with modern computers, but then again I have had a lot of problems sourcing software for Uni-T meters from their website. The clamp meter is ok when you get used to it quirks, specially for the price.
For my work I tend to get lead and large crocodile clip sets from either Megger or Fluke. Fluke just have the one large size (TLK1550-RTLC) Megger have three different sizes. For more standard sizes that are compatible with 4mm safety leads I guess the Fluke SureGrip ones are pretty good. TETC did a comparison video a while back on some crocodile clips, may be worth digging out if you haven't seen it.
With regard to calibration, I do some of mine own and some I send away. I have two high spec instruments that I send out for UKAS calibration, that is the UK standard for traceable calibration to national standards. I then use these to check out some of my own instrumentation. There are issues doing this though, to purely check another instrument is reasonably easy but is time consuming. Adjustment is a different ball game, you then need a stable test environment at the specified test temperature. You can also not always get the actual calibration adjustment procedure for the instrument, some such as Fluke, Keysight, they are readily available, Megger and Chauvin Arnoux are not.
There is also an issue with the time it takes, I do not have automated test setups, so am way slower that a proper lab. For the Omicron you see, it takes me around a full day to check it out, that is quite a bit at my hourly rate and sometimes it is just more cost efficient to send them away. It also depends on your client, some will not like an instrument that is internally calibrated and you need a third party calibration to keep them happy.
Cheers for watching.
@@three-phase562 Thankyou for this details as always I have yet to see anyone go into the level of detail you do. It’s amazing and feeds my own OCD. I have been interested in getting some high quality power quality test tool analysis I like the dranetz hdpq explorer series they are owned by gossen mettrawatt (and same equipment are branded as G&M in Europe) but it has its limitations on the frequency range its good for single and 3-phase stuff but not great oscilloscope quality. The other option is to get a very high end Keysight oscilloscope and try to live with its built in power quality functions.
Either way I would still need to code/program higher end power quality metrics based around wavelet, multi resolution and other multi Fourier integral series type analysis with cross spectral analysis to track/monitor and map by co-linking different signals. Taking me back 20 years with my PhD when I used these techniques with very different types of data (financial and economic). Choices are always a compromise. I think I will just take two separate tool and utilize them for what they are really good at having the two tools gives a better choice but a much bigger cost😭☹️
@@mathman0101 Whilst I really do like the Fluke leads, they are rather expensive for what they are.
I've fairly recently bought this set which works well for my use: uk.rs-online.com/web/p/multimeter-test-leads/1253735/
The one criticism I have is that the right angle plugs don't sit tight to the meter, they stick out further than I'm used to. The leads are at least as flexible as my Fluke ones, and I prefer the hook-grabber things to the retractable claw grabber things that Fluke uses.
Bad light
Sorry about the light - thanks for watching.