DAQCard-6036E excitation

[Minguccio]

I need to enable excitation on the input channels of a DAQCard-6036E. When I try to set the the voltage or current property for the channel I get the following error:

Possible reason(s):

Specified property is not supported by the device or is not applicable to the task.

Property: AI.Excit.VoltageOrCurrent
Channel Name: Dev1/ai0

Task Name: _unnamedTask<16>

Does this mean that the DAQCard-6036E does not support excitation?

Thank you,
Dominic Lacatena

[Tom_W_[DE]]

Hello Dominic-

You're precisely correct- the DAQCard-6036E does have support for configurable excitation to external transducers.  What type of transducer are you trying to measure?  In general, there is an SCXI module that will provide the necessary excitation, amplification, and filtering to the transducer.  For example, the SCXI-1520 is designed for strain gauges, load cells, and any other full-bridge transducer types.

Hopefully this helps-

[Minguccio]

Tom,

Are you saying that I can or cannot enable excitation on a DAQ6036E card?

I am using pcb sensors, one of which is a microphone and the other is an accelerometer and I am writing the software using DAQmx meant to be on a laptop using pcmcia.

Thank you,
Dominic Lacatena

[Tom_W_[DE]]

Hi Dominic-

The DAQcard-6036E (and all multifunction DAQ cards) do not feature excitation circuitry of any kind.  You will need some external hardware (such as the SCXI-1530) that can provide IEPE excitation for your microphones and/or accelerometers.  Alternatively, you could use a USB-9233, which has all of the excitation and acquisition hardware built-in.

[Minguccio]

Tom,

I have the DAQcard-6036E running to a SC-2345 and collecting input data through a SCC-FT01.
Would you happen to know if the SC-2345 or SCC-FT01 module send an external excitation?

Thank you,
Dominic Lacatena

[Tom_W_[DE]]

Hi Dominic-

The SCC-FT01 and SC-2345 are "front-end" signal conditioning units that don't add capabilities beyond those built-in to the DAQ card. The SCC-ACC01 does feature built-in excitation capabilities and may work for your application.

Hopefully this helps-

[Minguccio]

Tom,

Seen that I cannot get an internal excitation then I will use and external excitation source.
When using the SCC-FT01 how many channels can I hook up on one module?

I am under the impression that I can acquire data for two channels but I can only access the higher end channels ACH+8 and not the lower end.

I tried to follow the wiring specified in the manual but had no luck.
Can you please let me know how should I wire the connectors?

Thank you,
Dominic Lacatena

[Tom_W_[DE]]

Hi Dominic-

Page 5 of the SCC-FT01 user manual gives the pinouts for single-ended connections.  You will need to configure your acquisition for either RSE or NRSE mode with this configuration.  Can you please elaborate on the problems you are having accessing the lower channel?  What errors or problems are you running into?

Looking forward to your response-

[Minguccio]

Tom,

Thank you for your response. The problem has been fixed.
I needed to change the terminal configuration to NRSE instead of Differential.
At the moment I am able to acquire data on both lower end and upper end channels.

Thank you,
Dominic Lacatena

[Tom_W_[DE]]

Hi Dominic-

Glad I could help out- let us know if you run into any other problems.