Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
wkb:
--- Quote from: tautech on January 22, 2025, 12:09:37 am ---
--- Quote from: wkb on January 22, 2025, 12:04:36 am ---
--- Quote from: tautech on January 21, 2025, 08:27:05 pm ---
--- Quote from: wkb on January 21, 2025, 06:21:30 pm ---True. But stuff like Rigol and Siglent is a direct write-off if (when) it breaks once the warranty period has expired. Because "we don't repair on component level. And, no, there is not service manual. We offer module exchange.. Only 80% of new price".
Not thanks.. never again.. 🤮
--- End quote ---
Doesn't have to be.
Modules are not excessively costly until a greedy markup is placed on them. >:(
Doing such amounts to double dipping on the customer IMO.....and when they have supported your business, returning the favor is the right thing to do.
--- End quote ---
A €900 ex VAT replacement module for a DSA815TG which new was around €1400 incl VAT or so.
No, never again.
--- End quote ---
Supplier issue not a brand one.
As mentioned ex factory costs are reasonable for replacement modules.
--- End quote ---
Quality issues are. Upon inspection found abysmal soldering quality on the PCB
So.. no..
tautech:
--- Quote from: wkb on January 22, 2025, 09:06:37 am ---
--- Quote from: tautech on January 22, 2025, 12:09:37 am ---
--- Quote from: wkb on January 22, 2025, 12:04:36 am ---
--- Quote from: tautech on January 21, 2025, 08:27:05 pm ---
--- Quote from: wkb on January 21, 2025, 06:21:30 pm ---True. But stuff like Rigol and Siglent is a direct write-off if (when) it breaks once the warranty period has expired. Because "we don't repair on component level. And, no, there is not service manual. We offer module exchange.. Only 80% of new price".
Not thanks.. never again.. 🤮
--- End quote ---
Doesn't have to be.
Modules are not excessively costly until a greedy markup is placed on them. >:(
Doing such amounts to double dipping on the customer IMO.....and when they have supported your business, returning the favor is the right thing to do.
--- End quote ---
A €900 ex VAT replacement module for a DSA815TG which new was around €1400 incl VAT or so.
No, never again.
--- End quote ---
Supplier issue not a brand one.
As mentioned ex factory costs are reasonable for replacement modules.
--- End quote ---
Quality issues are. Upon inspection found abysmal soldering quality on the PCB
So.. no..
--- End quote ---
:-//
Not seen such on Siglent PCB's replaced under warranty or in older stuff.
Hydron:
Ironic that one can get an ADCMT brochure from R&S gloris but I cannot download the manual for a R&S scope I own as a private individual |O :-BROKE
atokhy:
I did notice that it had multiple channels (rear ports) but I imagine these values can only be read over USB/GPIB. I am looking for multichannel instruments so these ticked all the boxes. I might also be buying these to satisfy my curiosity in this subject.
At the moment I have no GPIB cables or accessories, and the time investment and money required to prepare all that is a whole other can of worms (I am starting brand new). Even low baud rate RS232 is sufficient for my needs. Both USB and RS232 are cheap and fast enough for my use case. I have some old commodity hardware that I need to make use of, some old servers from the 2000s for data processing and logging.
For my requirements, I'll need to simultaneously measure every battery in a DUT and record the performance of the circuit that ends up charging and discharging it (a BMS). I wonder if such a thing as a multi-multi-meter exists :D (so, a lower precision multimeter that does multiple simultaneous measurements at a lower rate). A BMS effectively does this, but it would be nice to get an extra digit of precision over the BMS's multi-multi-meter. Maybe I could find a higher end BMS and turn it into a multi-multi-meter, since it really just a circuit that iterates across every battery cell, taking a voltage and resistance measurement. I guess I could probably take one of my used medical grade BMSs and use it as some kind of specialized, single range, 3 1/2 digit multimeter. But then again this all sounds very easy, and there is a chance that I sound like I don't know what I'm talking about. I have no clue how any of this actually works. I have no way to tell what the maximum drift for a BMS is.
Anyway, on with talking about my online equipment gambling addiction. I am looking at the ADCMT 6541 4 quadrant source measuring unit. It can source 4 simultaneous DUTs at 4 1/2 digit precision and measure with 5 1/2 digit precision with a voltage range of +/-10V and a current range of +/-500mA. It's nothing like the Keithley 2401s which can go to +/-20V and +/-1A. But with the Yen being what it is, maybe it's actually worth going with the ADCMT given that it's specifically designed around designing battery management systems.
https://www.adcmt.com/en/products/vig/6540#a_03
timeandfrequency:
Hello atokhy,
--- Quote from: atokhy on January 22, 2025, 10:42:29 pm ---[...]
For my requirements, I'll need to simultaneously measure every battery in a DUT and record the performance of the circuit that ends up charging and discharging it (a BMS). I wonder if such a thing as a multi-multi-meter exists :D (so, a lower precision multimeter that does multiple simultaneous measurements at a lower rate).
--- End quote ---
Check out the 34970A with suitable multiplexer modules.
Take care when buying : there's an option that cancels/removes the 6 1/2-digit (22-bit) internal DMM.
And of course, you want to keep such a nice feature.
By using an unique 34901A multiplexer module, you can already monitor a 20S battery.
Device is easy to find on the second hand market : ebay (fleebay^^), T&M brookers,...
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