Products > Test Equipment
Modern replacement for 2-channel recorder with high voltage input needed
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egonotto:
Hello,

Unfortunately, I do not understand the requirements sufficiently.
At what frequency should the sample be scanned? Should the RMS value of the input voltage be measured?
So it's not clear to me if my hint is useful, but if not, it's not a bad thing.

Perhaps a device from the Analog Discovery Pro 3000 series will suffice. These have 14 bits with a maximum of 125 MSamples/s. However, there are only the input ranges +-1 V and +-25V with possible offset. There is a two-channel and a four-channel device. There is a logger mode. The devices can be operated via USB or LAN, but have a standalone operation (Linux)
Digilent has a very good forum when questions need to be clarified. The four-channel devices cost about € 1200 excluding VAT.

I almost sound like a sales person, but I'm not. However, I do own a few Analog Discoveries.

The WaveForms software can be downloaded for free and tried out in demo mode.

You can use normal probes, so a range of +-250 V is easily possible. The temperature could be detected with an external sensor if you use the four-channel device.

Best Regards
egonotto





BILLPOD:
EEVblog 121GW with a thermocouple.
Just hit the 'MEM" button. :horse:
simba15:
I have done lots of environmental testing with Hioki GL840, with over 40ch of data logging. ( temp or voltage or current)

Good unit, but software and menus are a bit outdated when compared to modern scopes, but functionally works great.
Martin72:
Hi,
I'm going to feed the Hioki a 400Hz voltage the next few days at work, less than 115V of course, to see if it even measures/displays correctly.
If that works, I will calculate a 1:10 voltage divider.
We have 0.2% resistors in stock, so that the accuracy can be sufficiently taken into account.
I will then report with results and thank you already now all who had participated with ideas and suggestions. :-+
Nevertheless, I find it amazing that there is no direct successor to the old paper recorders, which can measure high voltages and temperature (-sensors) simultaneously. :P

tautech:

--- Quote from: Martin72 on August 15, 2023, 09:13:15 pm ---Nevertheless, I find it amazing that there is no direct successor to the old paper recorders, which can measure high voltages and temperature (-sensors) simultaneously. :P

--- End quote ---
SDM3000 in Dual measure mode ?
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