The modal shop 485B37 for NI 6036E

[crimolvic]

Hello, I want to use a "the modal shop 485B37" for the signal conditioning of accelerometers signals to be acquired with the NI 6036E daq card.

My questions are about the signal conditioner: I have never before used this modal shop devices, thus, I don't know how to set the parameters like the LowPass filter cutoff frequency and the Gain. I don't know if this device is recognized by the MAX or I have to do this by other way.

Please, someone that has already worked with this devices give me some clues.

Thanking all of you in advance
CJMV

[Tom_W_[DE]]

Hi CJMV-

I haven't used your device in particular, but a good starting point for understanding signal conditioning fundamentals can be found in these two references:
Signal Conditioning Fundamentals for Computer-Based Data Acquisition Systems.
Increase Your Measurement Accuracy by 10X with Signal Conditioning

You settings for gain and LP filter cutoff will depend on the application. Lowpass filters are usually used to reduce jitter that can be induced in low-level signals by outside sources such as 60 Hz noise from nearby electrical devices.

The object of applying gain to a signal in signal conditioning (i.e. before cabling the device a comparitively long distance to the DAQ card) is to increase the level of weak sensor signals above any line noise that might be induced and to better utilize the input resolution of your card.

Basically, your sensor will not be recognized in MAX, but it's effect on your signal quality and strength will increase your system accuracy and performance significantly.


Thanks,

[crimolvic]

bien, ya aprendí a usar este dispositivo. poner los parámetros es necesario envían al acondicionador de señal un byte solo que los trozos determinan:
- el estado de la fuente ICP (con./desc.) - mordía P7
- el estado del Filtro de LP (permite/incapacita) - trozos P6 a P4
- el límite del Filtro de LP (10, 20, 30, 40, 50 o 70kHz) - mordía P3
- la ganancia (1, 2, 3, 4, 5x) - trozos P2 a P0

the digital output of the 6036E DAQCard is used for the byte sending and then, once the parameters are configurated, the acquisition is done in the conventional way.

example:
the byte 00000101 means: gain=1X (000); LP Filter enable (0); cutoff= 10kHz (010); ICP on (1)

best regards
CJMV

[Tom_W_[DE]]

Hi CJMV-

It seems that you will need to send a digital configuration pattern from one of your digital outputs in order to configure the parameters. The "Write Dig Port.vi" DAQmx example under Hardware Input and Output>DAQmx>Digital Generation in the NI Example Finder (Help>Find Examples in LabVIEW) shows how to accomplish this.

You can then use an analog measurements example to acquire your data such as "Cont Acq&Graph Voltage-Int Clk.vi" under Analog Measurements>Voltage in the same location.

Thanks-