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Entry impedance CR1000 / CR6 / CR200X / CR300

Benjamin.vial Oct 13, 2016 12:29 PM

Hello everybdy,

I need to know the entry impedance (on the measure terminals) of each these digitizers. The manuals said there is a "high-impedance" but no value is given to us.

Anybody know it ?

Or anybody knows how to measure it ? I'm not an electronic expert, but I need to know this value (at least for CR6 and CR300) in order to characterize a seismic sensor test.

Indeed the CR6 have an high enought frequency record to measure 3 channels differential in 125 Hz. Perfect for us, but only if there is a high impedance (but with numbers).

Thank for your help,

have a nice day

smile Oct 13, 2016 08:02 PM

Hello,

INPUT RESISTANCE: 20 GOhm for CR1000 and CR6,

INPUT RESISTANCE: 5 GΩ (fN1 = 50/60), 300 MΩ (fN1 = 2000) for CR300,

seem n.d. for CR200.

From datalogger specification documents on web site.

Smile

Benjamin.vial Oct 14, 2016 06:25 AM

Hello,

so ... ok, it was written on the specs ... Sorry about that : I was looking for occurrence "impedance".

So it's a very good news, the resistance is even better than the seismologic digitizer !

Thank you for you help.

Bye

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