I bought this Fluke 52 II as a 'for parts' item, and it couldn't power on. I disassembled it and found signs of suspected battery leakage causing corrosion on the PCB. After ultrasonic cleaning and reassembly, it started working normally.
Its casing has wear and tear, but it's not very noticeable. The plastic lens of the display has deep scratches that are quite unpleasant to look at. Is there any good way to fix it?
Yes, for some reason the plastic of the older 50-II series of thermometers are crap: I had a 54-II, since 2009, where the original case broke by normal use, no fall damage or any kind of damage since I take care a lot about by stuff. Replaced by a new one, and started cracking in the corners of the lens 2 years later. Replaced again and sold it in 2023.
I recommend replacing it with the newer 54-IIB case, it's easy to spot because the shade of grey is different, don't remember if lighter or darker. But you may need to add some shims in the LCD to make it contact the zebra strips on the PCB - at least in my case it missed some segments when normally assembled, had to put some layers of Kapton tape on the top as a shim. I may be able to source some directly here in Hong Kong/Shenzhen. But they will have the Chinese Lettering on the back for the warnings, since Fluke have their own Chinese versions here for most products.
Regarding me, I have to thank TERRA Operative for a MiniPRO TL866CS EEPROM programmer.