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Simpson 260 VOM Troubleshoot And Repair - Part 1
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- เผยแพร่เมื่อ 22 พ.ค. 2024
- Follow along as Erik troubleshoots this Simpson 260 - Series 4 VOM with a problem on the DC volt ranges. A look at the schematic is also included.
#testequipment #electronicsrepair #learnelectronics
This is a classic, they were everywhere !
Thanks for trying to get this meter working again. They are quality instruments and they still have applications today that cannot be handled with DMMs
Any examples?
@@RPike-bq3xm Yes, zero EMI emission environments. One in particular I know of was a physics lab conducting experiments to measure the EM emissions from various materials under various conditions. The detection system needed to be calibrated using equipment that had zero EMI emissions, for obvious reasons.
Obviously you don't have much experience in electronics because then you would not ask.
Excellent meter. Still made. I use one all the time. Makes you understand what you're attempting to measure. If you purchase new in 2024 between 550-750 dollars.
Wow, I didn't know that, I found a place where they sell it (ITM) probably made in China ? same quality ? is there a market for that ?
I have an old Simpson 303-Xl, still working, I love it.
@@levent8208
They are Made in USA. Still a market for them. Several areas still use them. A couple are power monitoring and in EMI free testing environments.
I love these meters too. I was taught on the Simpson but in less than a years time Fluke came out with the 8060A(B) and the company went with that for any new purchases.
Reading any common return AC on Airliners made them wig out. For some reason, I don't have that issue anymore.
330+470 also conveniently adds up to exactly 800.
I'd guess most of the resistors have aged up slightly over time, I'd look at ordering new ones (R10, R12, R14, R15) for the next time you need to make a buy from a supplier.
I have one of these meters from the 60's still in the box. Where can I find batteries for it?
This series 4 version and other earlier version models used a standard D cell and four AA's. Later models starting at series 6 and newer used a D cell and 9volt battery.
@@EriksElectronicsWorkbenchI had one for years with the 4 AA cells and D but due to a fall it suffered it wasn't reliable anymore. I bought one that the man said was from the 1960s and it takes either a 22v or 15v battery I forgot exactly what because it was removed (and both the 15 and 22 were very close in size). The slot the higher voltage battery sits in looks like a CR17345 would fit (but not work of course) I'm positive they're still available.
@@RetroCaptain None of the Simpson 260 series used the hard to find higher voltage batteries. If your meter uses those batteries it is a different model. The very first 260 from the 1930's used two "905" 3 volt batteries and one "C" cell 1.5 volt. 260-series 2 up to modern series 8 used combinations AA, D, and in newer models a 9volt battery.
@@EriksElectronicsWorkbench
It says Simpson Canada "260SP"
It has a white Reset button on the front
The slot for the oddball battery the contacts are top and bottom and it's too shallow for an 006P type to drop down in.
Oh it's possible there's a 9v with top and bottom contact...I know I had something decades ago with a very similar battery.
I also have a Triplett USA model 630 type 2 and it also has this same size slot battery missing and I'm positive I read somewhere it's supposed to be 15v and someone taped together a stack of LR44 .. probably not Cells but batteries that dimension and managed to supplant the original No. battery.
The Triplett lacks the Current range I was after. I mainly used the 10a option on the 260 at my old job this Triplett 630 only has 60uA.
Worst case scenario I can swap out the D'arsonval movement from this to the one that is damaged as it still works apart from having to tap it repeatedly to get a reading (that may still be out).
This one has I think 2 capacitors that will be out of tolerance.
I forgot I also have a Simpson Canada small Ammeter. Micro Ampere Miliampere and Simpson Element Tester for testing the accuracy of Baking Elements and Firing Rods.
@@RetroCaptain ok makes sense the 260SP is a different series than the 260 model in my video. The 260SP is the industrial safety version with overload protection. The reset button is part of the overload protection. The 260SP is still manufactured today although batteries used are modern types.