- From: John Sims <john_at_coherentimaging.com>
- Date: 02 Oct 2002 09:15:27 -0600
On Wed, 2002-10-02 at 09:09, Calin A. Culianu wrote: > > Greetings, > > I am humbly requesting some advice from you data acquisition and control > experts out there... > > I wanted to ask you guys what would be the best DAQ board for our > application? (More on the specifics of out application below). I have > been perusing the products offered by both Measurement Computing and NI > and can't decide what to get. It seems the Measurement Computing boards > are somewhat cheaper than the NI boards, even though they seem to have > better specs overall. (higher sampling rates, etc). > > However, I know that the multiplexer on a board is often an issue -- > especially if you are sampling from more than one channel at a time. We > plan on doing mapping of cardiac tissue, using voltage 'sensors'. We plan > on having 64 electrodes map out an 8x8 grid of cardiac tissue in order to > record cardiac wave propagation on the tissue. Since 8 * 8 == 64, we > basically need the ability to sample all 64 channels at once, at a rate of > 1000 kHz per channel (for an overall rate of 64 kS/s). > > Here are the two boards I am looking at: > > Measurement Computing -- > PCI-DAS6402/16 High-Speed PCI-bus Compatible, 16-bit, 64-Channel AI. This > one publishes a 200kS/s sampling rate, and only costs $1,199.00. > > National Instruments -- > NI PCI-6033E 100 kS/s, 16-Bit, 64 Analog Input Multifunction DAQ - This > one seems to have a lower sampling rate than the above board, but costs > $1,695, which is about $500 more! I have used Measurement Computing's boards before, though not this one. The board performs very well in all areas, and I think it will be a good choice for you. However, the inside cover of my manual has a notice regarding the use of MC's boards in medical applications. It basically states that their components are not designed or tested for applications for "treatment and diagnosis of people". You might want to contact them before making your choice, and probably see if NI has a similar disclaimer. Regards, John
Received on 2002-10-02Z14:15:27