Products > Test Equipment
Keysight 34465A reliability
Smith:
--- Quote from: alm on April 09, 2022, 03:27:47 pm ---So it was only used for maybe 40 hours yet it's already out of warranty? Could be an open thermal fuse. But test equipment companies (Keysight, but also Keithley / Tektronix) certainly aren't as helpful with service information and spare parts as they used to be.
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It was sold about 2 or 3 years ago. I've done a lot of software for the last years, and haven't used it much.
--- Quote from: alm on April 09, 2022, 03:27:47 pm ---And I've had numerous HP/Agilent instruments, none of which has had any transformer trouble. I do have a Keithley 6485 with an open primary in its transformer. Tektronix are ignoring my requests to buy a spare, so it's just sitting there. None of this gives any useful data about the reliability of the Keysight 34465A or the Keithley DMM 6500, however. Just anecdotes.
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I never had any trouble getting Keithley parts. I've ordered displays, display assemblies, connectors, resistors (which I had blown), housing parts and such. Never had any transformer fail on me though. At this moment I have 7 Keithleys on my personal bench, so fingers crossed.
I'm almost sure it's the thermal fuse, but it would be quite some destructive work disassembling the whole transformer. I would if it would be my personal unit. Some transformers have the fuse accessible from the outside, this one was epoxied in the transformer. Took about 140 dollar for a new unit from China via Ebay.
wraper:
--- Quote from: Smith on April 09, 2022, 05:43:38 pm ---It was sold about 2 or 3 years ago. I've done a lot of software for the last years, and haven't used it much.
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AFAIK it has 3 year warranty. Warranty status checked on the Keysight website does not matter since purchase date in a proof of sale actually matters.
--- Quote ---I have a 34465A at work, just died after maybe 40 hours. The transformer is blown (input side is open), I'm still waiting for a replacement from China. Keysight won't sell the transformer to me.
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I don't think that a usual transformer is up to the task for such precision meter. It will probably inject too much leakage current into the DUT. I would take the outer insulation off and see if a thermal fuse can be reached.
Smith:
--- Quote from: wraper on April 09, 2022, 05:51:35 pm ---I don't think that a usual transformer is up to the task for such precision meter. It will probably inject too much leakage current into the DUT. I would take the outer insulation off and see if a thermal fuse can be reached.
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The transformer had the same number as the original, not just a compatible transformer. It was also sold as a 34465 / 34461 type transformer, it looked the same too, so I guess it should work. The transformer was epoxied stiff. It would take some serious work the get to the thermal fuse, with a reasonable probability of doing more damage. I did this type of repair to other transformers without any trouble, but not this one.
tautech:
--- Quote from: skander36 on April 09, 2022, 03:03:04 pm ---Siglent SDM 3065X is already out of calibration after 3 years.
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Which ranges ?
Are you aware of the SDM Cal site Defpom made ?
http://www.thedefpom.com/siglent_sdm_calibration.php
skander36:
--- Quote from: tautech on April 09, 2022, 07:31:27 pm ---
--- Quote from: skander36 on April 09, 2022, 03:03:04 pm ---Siglent SDM 3065X is already out of calibration after 3 years.
--- End quote ---
Which ranges ?
Are you aware of the SDM Cal site Defpom made ?
http://www.thedefpom.com/siglent_sdm_calibration.php
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Yes I am aware. But this method is useless if you don't have a calibrated source like his Datron.
I know that after one year any DMM need calibration, but the ideea was that SDM3065X left me with the sensation of not being in the same league as Keythely,Fluke or KS. This is why I headed to 34465A. But this topic make me anxious about ... :-\
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