Hey guys!
I'm new here, pretty new in the EE-hobby.
Tried searching the forums, but I could not come upon any information on the matter, so here goes.
I happened upon a cheap Fluke 1503 on Ebay, knowing that it's the cheaper version, but pretty sure it would be enough for my needs.
However, when I tore it down, much to my surprise I found all the 1507, the more sofisticated version, buttons hidden under the plastic case, exept of course with lower profile and without writing. It also had the Pass LED on there. I found that a bit interesting.
On further testing (with any bodyparts far away from the output jacks) it turns out that it actually has all the 1507 functions built in to it, includin the 250, 100 and 50V modes, the Compare function, the PI and that other function I cant remember the name of. Pretty cool huh? In other words, all you have to do to turn the 1503 into a 1507 is to change out the case and keypad. Except one thing of course. The 1507 measures up to 10 gigaohms, whilst the 1503 only goes to 2 gigaohms. Now, I can't imagine that it would have all the buttons and LEDs, as well as all the fuctions programmed in the micro, and then not have the 10 gigaohms function on it as well. Question is how to access it.
Any chance anyone here knows about this?
If not, would anyone that has the 1507 in their posession feel the slightest inclination to tear it down and take some high res photos of the board so I can compare mine to the photos, and see if they have maybe changed a resistor or put a jumper somewhere or something of that sort?
The 1503 has some unpopulated pads on the top of the battery side of the board, however I think those are for some type of IR interface rather than for extending the metering range, but I don't know.