My digital multimeter uses a piezo-electric thing for a continuity tester, and it has failed. I call it a "thing" because I'm no longer sure if it is a buzzer, diapragm, or some of the other things.
If one is called "externally driven", does that mean it will have 3 wires instead of two?? No pictures are given where that word is used.
Trying to find a replacement. It's quite small. It's like a plate or disk, 22mm in diameter, 4.5mm high. It has two ears for mounting, and on the top there are embossed concentric circles, with a hole in the middle of them, with a copper diaphragm visible through the hole.
At a hamfest I bought one that was the right size, but it has 3 wires instead of 2. I don't know how to make that work. I think I need one with only 2 wires.
My meter is a Circuitmate DM25, fwiw. The original beeper had no part number, but the one I bought is PKM11-6A0 (or O). From looking at catalogs, the eleven should represent a diameter (right?) of 11mm, but in fact, it is 22mm in diameter.
Any advice?
** This one is like a dinner plate, 22mm in diameter, with two "ears" with holes for mounting, 4.5mm high, and the top has concentric circles showing in the black plastic with a hole in the middle for the sound.Meirman
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