Fluke 189 II / 287 / 289 Jack Plug

thingiverse

I've had this recurring anxiety that when I'm working with IPA, resin, CA, silicone, hot glue, water, and other liquids on my desk, I'll accidentally spill it into my multimeter's unused probe ports. It's an entirely irrational fear, especially considering I always keep the multimeter propped up. So, I've decided to create custom plugs for my own peace of mind. The goal is to keep probes plugged into two of the jacks and seal off the other two. The reason specific models are mentioned in the description and tags is that these particular plugs have been designed not to trigger the Fluke's probe detection feature. This feature uses IR LEDs and photodiodes inside the jacks to detect when a connector is inserted, which then alerts you if you've got the leads plugged incorrectly for the chosen mode. The tolerances are quite precise - I've designed the plugs so they won't fall out but also aren't too difficult to insert. However, your results may vary depending on your printer and material. If you encounter issues, try scaling up or down a little.