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| Alternatives for obsolete Yokogawa MV2000 |
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| nctnico:
The GP10/GP20 look more like the MV2000 but since you want to have high voltage inputs, the DL950 / SL1000 with their modules (including 4 channel isolated ones) may be a better fit. What you may need to pay extra for the system, might be compensated by not needing expensive external dividers. But it also highly depends on the features you need / expect. |
| Martin72:
Jap, Actually we compensate the lack of high voltage inputs with a simple transformer circuit, the lack of high current by using a suitable shunt. As the question of a second recorder cames uo I thought it was a good situation to look for high voltage inputs, so we don´t must rescaling the values. Additional, a similar system like our old yokogawa, everyone knows how to work with. Normally we use the yokogawa for dry heat running tests and only using the channels for temperature, this happens 4...6 times a year. But now we got the new project and still the heat tests, therefore a second one is needed. This reminds me, we got an elder Yokogawa DL ??? scopecorder with 16 channels, 6 are having HV modules. But no temp inputs, no usb. |
| nctnico:
The temperature modules can be obtained on the used market. Or maybe even from Yokogawa. Lack of USB is a thing though. I have a DL708 ; together with a Prologix ethernet to GPIB converter it is easy to control over ethernet. |
| alm:
What kind of accuracy and sample rate do you mean when saying continuous recording? Many instruments with multiple analog inputs, including some scopes, will multiplex multiple signals to a single ADC. The question is how fast. High voltage scanners generally use relays so I'd expect multiplexing rate in the order of 100ms. Check the data sheet. If you don't need high voltage or very high accuracy, then maybe a DAQ like the Labjack T7(-pro) would work with 14 analog +/- 10 V inputs connected to a 16 to 24 bit ADC with sample rates up to 100 ks/s (single channel)? |
| Martin72:
--- Quote from: alm on August 13, 2022, 07:25:50 pm ---I have not used this particular unit, but I have used similar units from Keithley and Agilent, I think the Rigol works the same: it's basically a single DMM plus multiple multiplexer / switch cards. The multiplexer cards contain a bunch of relays or FETs that can connect one of the input at a time to the DMM. You can either control this directly, e. g. close switch X, or tell the unit to scan through all channels and take a measurement at a certain rate. That's why they are sometimes called scanners. . --- End quote --- Got the yokogawa MV200 open, it seems it´s the same there and this would be also on our MV2000, so I must have a look at the specs from the 2000, concerning the measure rates. And then we´ll see what alternatives will fit. |
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