Products > Test Equipment
Old Fluke Multimeters
frozenfrogz:
--- Quote from: Electro Detective on April 30, 2017, 11:57:24 pm ---@ frozenfrogz
I have a mains operated 240 volt Fluke 8050A I was using just a few days ago, and verify it's still doing its job properly etc and have never noticed any "gentle ’tick’ noise every couple of minutes"
I'll get it out later today to check for that, and reply back.
Edit: No 'tick' noise here, just a wee small transformer hum when held up close, and no relays that I can see inside.
What switch mode/s or conditions does it do the ticking business? Is yours a mains or battery operated type? If it's a battery type perhaps it's a charging/ switching sound? just guessing :-//
Mine is surprisingly still up to spec on all ranges, but not sure if the RMS AC reading 'may' be a few volts off compared with other RMS meters.
Difficult to verify which meter is the spec winner when using slightly flat top 240 volt mains power as a reference/comparison.
I'll have to do it with a function gen and see how my meters really fare one day.
--- End quote ---
It’s mains only, no batteries inside, the 'tick' appears when it is plugged in. There is no difference in the different mode selections and whether the unit is powered on, or off.
I will take it apart in the next couple of days and patiently wait for the 'ticks' to appear and localize its origin.
drtaylor:
I have scanned a write-up I did long ago that explains some hidden features of the 8060A. The illustrations aren't there, but there is sufficient text to explain them. I think these all work...there's always a possibility that the software was modified to eliminate these special features. I also scanned a summary of power up features which shows the ratio mode and the switch test - Useful for troubleshooting.
ModemHead:
--- Quote from: frozenfrogz on May 01, 2017, 03:06:03 pm ---It’s mains only, no batteries inside, the 'tick' appears when it is plugged in. There is no difference in the different mode selections and whether the unit is powered on, or off.
--- End quote ---
Can't hear anything from any of mine. (My hearing is not the best, though.) Both battery and non-battery models use low-voltage power switching, so maybe something to do with the transformer.
Or.... GET OUT NOW! :o
saturation:
Thanks Dr T, love those those old typewritten app notes
--- Quote from: drtaylor on May 01, 2017, 04:28:54 pm ---I have scanned a write-up I did long ago that explains some hidden features of the 8060A. The illustrations aren't there, but there is sufficient text to explain them. I think these all work...there's always a possibility that the software was modified to eliminate these special features. I also scanned a summary of power up features which shows the ratio mode and the switch test - Useful for troubleshooting.
--- End quote ---
drtaylor:
Re 8050 Tick
I too don't hear anything on my 8050 (at 120VAC). I would suspect intermittent arcing in the AC supply components which are aggravated by the 240VAC typical European mains. The transformer might have a worn winding that arcs occasionally causing a tick. Check all input components and look for carbonized PCB areas. I've also known old electrolytic caps to tick, caused by arcing across the insulator, but that's less likely. If it's the transformer, you should be able to observe a glitch monitoring the secondary AC across the bridge. If the transformer is bad you're probably out of luck for fixing it.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version