Difficulty configuring Array microphone using NI-9215 and MAX

[LGardiner]

Hello All, 

             Apologies in advance for the stupid question.

As stated above, I'm having some difficulty configuring a G.R.A.S. Array Microphone Type 40PH though my N1-9215 DAQ. When I attempt to assign a global virtual channel its telling me "no supported devices found" when attempting to configure as a sound pressure sensor.

I can set it up as a voltage analog device, but the readings I get from it are nonsense, its just white noise that doesn't react to sound differences at all.

I fear I have missed something basic!

Apologies if this is on the wrong discussion board.

[Henrik_Volkers · Accepted solution]

Seems like your mics needs a IEPE input, that your 9215 doesn't support.

Use a DAQ that supports IEPE inputs with a current meeting the requirement of 2mA,

or use a signal conditioner between your mics and the voltage input of your 9215 that provide a IEPE (or CCLD or CCP or ICP or Deltatron.... or  however the company name it ;)) 

Look in box if you find a conditioner or another DAQ 😄