DAQami software cannot get the right data from DAQ (USB-1608G)

[clement-AA]

Hi, 
I have a probleme similar to this one, but I'm using a USB-1608G.

After verification our sensors have an impedance between 1 and 2 kOhms. Do you have any recommandations on how to implement the convertion from high impedance signal to low impedance ?

Regards,

Clement

[QiwenSheng]

Hi Clement,

Thanks for asking. Unfortunately, I'm still trying to solve this issue. For my case, I need to connect with an operational amplifier or switch to a new photodetector with integrated amplifier.  Hope this helps. 

Qiwen

[clement-AA]

Hi Qiwen,

You were thinking to use an operational amplifier as a Voltage follower ? I was looking for a pre-made solution but signal conditionner are expansive and i need 10 of them, so i was thinking to implement a simple voltage follower, but I'm not sure if it's the right choice.

Clément

[Fausto]

Hello.

Use a voltage follower op amp configuration to change your high impedance signal to low impedance. 

[clement-AA]

Hello,

Currently I don't have symetrical power available yet, I only have 0-24V and 0-5V. Do you have a recommendation ? Or should I add one, and use TL081 op amp for example ?