Source for replacement piezo buzzer? (Fluke 117) - Page 1
Forum section: electronics / testgear

author: iXod
author_rank: Frequent Contributor
timestamp: May 12, 2016, 05:31:02 pm
content: Piezo died in Fluke 117.Where can I source a replacement piezo buzzer? Fluke no help.Cheers.

author: retiredcaps
author_rank: Super Contributor
timestamp: May 16, 2016, 04:55:20 am
content: There doesn't seem to be a Fluke part number, so I suggest going to digikey/mouser and trying a few different versions.BTW, I saw your post about a DMM with a loud beeperhttps://www.eevblog.com/forum/chat/what's-a-handheld-dmm-with-a-loud-beeper/This may be an opportunity to try different buzzers in the 117 to find a really loud one?

author: Zero999
author_rank: Super Contributor
timestamp: May 16, 2016, 07:42:02 am
content: I don't know about Fluke but it most meters I've taken apart, the buzzer is just a piezo disc transducer which is externally driven by an oscillator or MCU IO pin on the main board.It's unlikely it's the piezo which has failed because there really isn't anything to fail. It's far more likely a wire has become detached from either the piezo or the PCB.

author: Raj
author_rank: Frequent Contributor
timestamp: May 16, 2016, 09:00:11 am
content: buy a "passive piezo buzzer"http://www.ebay.com/itm/5-X-DC-3-24V-Black-Piezo-Electronic-Tone-Buzzer-Alarm-Continuous-Beep-DB-/201434092339you might need to mod the housing though...get your dremil ready (cut the buzzer's housing not the meter's)

author: Micke
author_rank: Regular Contributor
timestamp: May 16, 2016, 11:25:47 am
content: In some FLUKE´s there are two springs mounted on PCB making the contact to the piezo disc. I had one FLUKE 177 with faulty buzzer, but it was just the springs that got mis-aligned to the discpuh!

author: Zero999
author_rank: Super Contributor
timestamp: May 17, 2016, 11:23:46 am
content: Quote from: Raj on May 16, 2016, 09:00:11 amThe buzzers linked to in your post are unsuitable as a replacement for the piezo transducer in a meter because they have a built-in oscillator. You need a piezo transducer without a built-in oscillator.

author: Raj
author_rank: Frequent Contributor
timestamp: May 17, 2016, 01:40:22 pm
content: but I've linked passive peizo...IE without any circuitry just the peizo disk inside of plastic housing.... besides... he can desolder with ease

author: Monkeh
author_rank: Super Contributor
timestamp: May 17, 2016, 01:47:03 pm
content: Quote from: Raj on May 17, 2016, 01:40:22 pm'continuous beep'. That ain't a bare piezo.

author: Zero999
author_rank: Super Contributor
timestamp: May 17, 2016, 03:07:17 pm
content: You need a bare piezo transducer, like this:http://www.ebay.com/itm/5-Piezo-Transducer-Sound-Discs-YOU-CHOOSE-SIZE-Drum-Trigger-Guitar-Pickup-/121253903935?var=&hash=item1c3b4bbe3f:m:mFyEDs70E0LLsV_harzYKegNote that they come in a variety of sizes, so make sure you get the right one.

author: Raj
author_rank: Frequent Contributor
timestamp: May 17, 2016, 04:21:50 pm
content: those might be hard to source.My guitar had one :pbetter look for whatever source is cheapest for you and salvage it from there

author: Zero999
author_rank: Super Contributor
timestamp: May 17, 2016, 07:14:57 pm
content: Quote from: Raj on May 17, 2016, 04:21:50 pmPeizo disc transducers fairly common. Most component shops sell them and failing that, cheap toys and musical greetings normally contain one.