PCRU01 mini channel four signal recorder

Hi all,
Here we have an issue we bought Velleman PCRU01, it was connected to source 24 Vdc but when try to chech de output looks like velleman divided the voltage intheir four channels.

We need to feed radiation sensor which it has low impedance. Shoul be have a problem wit that?

Sorry, I do not quite understand this:

Could you please explain the problem more in detail.

The recorder is working well, only one channel is 0 ohm. What is meant by “Measuring DC components only?” All signals can float. kind regards

I mean what frequency and amplitude is acceptable?

The max sampling rate is 1000S/sec (1kHz).
It is possible to measure signals up to about 10Hz with good resolution.
The maximum amplitude is 40Vpp.
Here an example PCRU01 screenshot of 10Hz 10Vpp waveform:

pcru01_10hz

thanks for your messages, I understood the problem, and fixed!!
Regards,
SR