TS-352A/U Multimeter Obsolete Battery Upgrade To Modern Batteries & Overview Of How To Use The Meter

Follow along as Erik makes this vintage military spec TS-352 A/U (also called ME-9 H/U) multimeter useable again by replacing the obsolete batteries with modern types while avoiding any unnecessary modifications to the multimeter. Details on how to use the meter are also shown.
#learnelectronics #multimeter #vintageelectronics

[@robbo6460]

I have to say that your videos are very well done and super informative. I find myself watching them more and more. Thank you.

[@EriksElectronicsWorkbench]

Thank you for the compliment! Glad to know you enjoy the videos.

[@bobbrown4088]

Eric, thanks for your video. I have a Weston TS-352A/U and need to replace the batteries. I am going to try 4 Lithium-Ions for a total voltage of 14.8 plus the 1.5 d cell for a total of 16.3 volts. This only leaves me a cushion of .6 volts. I will have to make sure the Lithium-Ions aren't charged to the max, but it should work.. Wish me luck!

[@levent8208]

That's a pretty cool multimeter when was it made ?

[@EriksElectronicsWorkbench]

The military service manual is dated January 1967 so these meters were made in the 60's and 70's. Not sure if they built them into the 80's. They were built under contract for the military. There is no date on this unit so I don't know exact date of manufacture.

[@levent8208]

@@EriksElectronicsWorkbench Thank you Erik, it's a very nice instrument, I have myself and old Simpson electronic multimeter I acquired in 1978 or around that date when I was studying electronics, I love it and they are rather accurate.

[@levent8208]

@@EriksElectronicsWorkbench And I have subscribed, I live in Montreal.

[@EriksElectronicsWorkbench]

@@levent8208 Simpson makes very nice meters that do last a long time.

[@EriksElectronicsWorkbench]

@@levent8208 thanks!

[@splitprissm9339]

Might be prudent to insulate the inside of the battery lid, and even the bolts - if any of that retrofitted battery wiring shorts or arcs to the case, it could result in a live case when measuring high voltages.

[@EriksElectronicsWorkbench]

Yes I placed an insulating spacer cushion between the batteries/holders and the lid. Otherwise the batteries would be loose and moving around and as you mention possibly shorting to the case.

[@nick8231]

It seems that I'm having no luck whatsoever trying to find the replacement connectors

[@EriksElectronicsWorkbench]

Which connectors are you referring to?

[@nick8231]

@@EriksElectronicsWorkbench the tip Jack for the probes

[@EriksElectronicsWorkbench]

@@nick8231 The socket connectors to accept the pin plugs on the test leads are available at Digikey (Mouser and others too) here are links for some examples: www.digikey.com/en/products/detail/pomona-electronics/3542-3/736506 == www.digikey.com/en/products/filter/banana-and-tip-connectors/jacks-plugs/302 == www.surplussales.com/equipment/testequipment/TestEquip-18.html the type used in this meter were special in how they mounted to the front panel so they were water tight. An exact replacement is not likely available. I think you'd have to salvage from a parts meter.

[@nick8231]

@@EriksElectronicsWorkbench I'm looking for the plug itself not the socket

[@EriksElectronicsWorkbench]

@@nick8231 here are two sources: probemaster.com/3436-design-your-own-test-leads/ == www.ebay.com/itm/225608641720?hash=item348752acb8:g:6lIAAOSwihpkRHhb&amdata=enc%3AAQAIAAAAwEs%2BiPl6cYJLl4ZoR5ImT4%2FJTQqHMoq1sTQXelOr1soDmIrP9oEMdGzKNQY9kIz%2BIAhYP6kQrXI2vl7bH6VB%2BaXHP67ldWf%2B93noLeQfi2oAgN1P2fLwLxgHeerCy2yNuxsX85UzY0lFkgg12Gy30wIwuiprutbxJHPeuM%2Bo2pRmithENtHKE91fYte7ObZifhVu8NPeaAAX5qEIzme7tgx6Faf2vXmON7lI7aeDNo4Xt9zkbyjzTAqitqhRKtPl7Q%3D%3D%7Ctkp%3ABk9SR8LWrZCYYg