I'm going to start working on my first restore/rebuild. It's a Brasilia Portofino Del-2 Compact. I wanted to start this thread to post pictures of my progress and what I'm learning as I go. If you have input or suggestions I would extremely appreciate them as I am new to this process.
First, from what I was told when I got this machine the main issue was the heating element. There is also corrosion that needs to be cleaned. I have a workshop that has power that I will be working on the machine.
CHALLENGE 1: Getting water setup. I do not have a water line available so I need a good way to get water to the machine.
Water, especially boiler water, isn't going to be much of an insulator. The only time I've been fooled using my Fluke, is when I failed to notice the "K" symbol lit up. Both elements in a steam boiler read 14.8. One was 14.8 K ohm and the other was 14.8 ohm.
Hmmm... doesn't sound like a tool worth carrying if you're a guy that usually tests machines out in the wild. Glad we talked about it though.
Latté 911 said:
The difference between using the Megger versus a regular multimeter is the ability to put a high voltage across the testing points using capacitive discharge. Admittedly when there's water in the boiler a water short is usually pretty obvious, but when evaluating a machine for refurbishment that has an empty boiler and/or trips the breaker when powering up, the insulation resistance test with a Megger is quick, easy and conclusive. Cheers
I test insulation resistance using a Curtis Handyman Multitester. This is a device left over from my days working on electric forklift trucks. There are meters devoted to the purpose, and most domestic units range in the $6-800 range, though Chinese units can be found for far less which still deliver acceptable accuracy and service life. I keep it in the shop as you acknowledge, working units freshly broken-down can be usually diagnosed without one. I only take it with me when purchasing units for refurbishment. You can test a heating element, and verify integrity of motor armature and field windings, without powering-up a machine. It does have its uses. Cheers