Products > Test Equipment
An ugly but working HP6060B Electronic Load
AMR Labs:
--- Quote from: jwrodgers on January 17, 2023, 02:17:26 pm ---Also, need to check, but I am sure some mods need done to the sensing circuitry when putting the posts on the front to make sure the sense is picked up close to where the posts are installed, I will have a look in the service manual and report back later.
--- End quote ---
HP used to offer a Front Panel upgrade kit for the 6060B, and all it included was the two additional binding posts, and appropriate lengths of red/black #8 wire with fitted terminals on each, plus I assume the front panel reinforcement plate. Personally I would go for #6 fine strand (marine spec) wire which is much more supple and easier to bend although this might still make it a bit more difficult to fit and handle for the installation. Then again for such a short length good quality #8 wire might be more than appropriate to handle 60amps without any appreciable and measurable loss that might influence the accuracy given the readout resolution. And btw I understand that #8 is exactly the same wire size that the factory fitted front posts also used.
AVGresponding:
--- Quote from: jwrodgers on January 17, 2023, 02:35:18 am ---Managed to get 2 Black from RS, but they have discontinued the Red ones. A further search led to the same parts, and other 60A binding posts from Cliff Electronics:
https://www.cliffuk.co.uk/products/terminals/touchproof.htm
Seems like an audio-foolery site, but nice terminals :) Hope they don't have audio-fool prices.
--- End quote ---
Cliff Electronics are a well known and long established manufacturer in the UK. The quality will be good, if not superb. There's no audiophoolery.
These have been an industry standard for decades: https://www.cliffuk.co.uk/products/tools/quicktest.htm
AMR Labs:
--- Quote from: AVGresponding on January 17, 2023, 05:56:22 pm ---
Cliff Electronics are a well known and long established manufacturer in the UK. The quality will be good, if not superb. There's no audiophoolery.
These have been an industry standard for decades: https://www.cliffuk.co.uk/products/tools/quicktest.htm
--- End quote ---
I think the correct link you meant to publish regarding the quality of the posts is this one instead:
https://www.cliffuk.co.uk/products/terminals/touchproof.htm
The one you posted is unrelated.
AVGresponding:
No, the link I posted was the one I intended to. Perhaps I should have added some context; the Quicktest is an industry standard, and anyone that works testing and repairing things that can be powered from 1-ph mains is likely to have one for bench testing purposes.
amc184:
--- Quote from: AMR Labs on January 17, 2023, 01:05:01 pm ---Very nice work you did there, and look forward to the Gerber files if your prototype plates work out. Its a good idea, and perhaps even a piece of regular FR4 blank fiberglass PCB might also be strong enough even without the aluminum backing.
One thing I noticed in your pictures is that you set the holes of both posts vertically (where the wire goes into), which would make it a bit difficult to insert the wire into the lower post unless you come from bellow, except for example if the unit is sitting flat on a bench as shown in the picture. In the original 6060B with front panel posts these holes are set to be on the horizontal plane so both wires can easily be inserted from either side of each post.
--- End quote ---
Thanks. I would think that normal FR4 would work fine, but aluminium backed is almost as inexpensive. The acrylic I'm using now is okay for a 6060B, but in something like a 6644A a better material is really required, and the existing ones I'm about to replace are quite concave once installed (but functional).
It's a good point about the post orientation, I must have thought something different at the time, but what you say makes sense. The panels I drew up have the orientation notch in all four directions, so they don't restrict how it's used. I might even rotate them when I put in the new panel.
--- Quote from: AMR Labs on January 17, 2023, 02:40:09 pm ---HP used to offer a Front Panel upgrade kit for the 6060B, and all it included was the two additional binding posts, and appropriate lengths of red/black #8 wire with fitted terminals on each, plus I assume the front panel reinforcement plate. Personally I would go for #6 fine strand (marine spec) wire which is much more supple and easier to bend although this might still make it a bit more difficult to fit and handle for the installation. Then again for such a short length good quality #8 wire might be more than appropriate to handle 60amps without any appreciable and measurable loss that might influence the accuracy given the readout resolution. And btw I understand that #8 is exactly the same wire size that the factory fitted front posts also used.
--- End quote ---
As far as I've seen the additional plastic moulding in the official option is only decorative, I don't think it would provide more structure (or that any is needed). You could install the binding posts without adding anything but the hole, I mainly added my panel for the legend and to match other units I've done the same thing to.
The wire I used is about 5AWG, and it's a high flexibility rubber insulated welding cable. Here's the datasheet:
https://products.lappgroup.com/online-catalogue/power-and-control-cables/harsh-conditions/rubber-cables/h01n2-d.html
It probably drops about 30mV at 60A, round trip. I'm okay with that, it's probably below what's dropped at the various connections, including the binding posts.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version