April 13, 2004

VI curve

I managed to get the 6430 to take a VI curve using the following code:

:*RST;
:TRAC:FEED:CONT NEVER;
:TRAC:CLE;
:TRAC:POIN 100;
:STAT:MEAS:ENAB 512;
:*SRE 1;
:TRIG:COUN 100;
:SOUR:FUNC VOLT;
:SENS:FUNC "CURR:DC";
:SENS:CURR:NPLC .01;
:SENS:CURR:RANG:AUTO OFF;
:SENS:CURR:PROT:LEV 100E-3;
:SENS:CURR:RANG 100E-3;
:FORM:ELEM:SENS CURR;
:SOUR:VOLT:START 0.01;
:SOUR:VOLT:STOP 1;
:SOUR:VOLT:STEP 0.01;
:SOUR:VOLT:MODE SWE;
:SOUR:SWE:RANG AUTO;
:SOUR:SWE:SPAC LIN;
:TRIG:DEL .1;
:FORM:SREG BIN
:TRAC:FEED:CONT NEXT;
:OUTP ON;
:INIT;
followed by
:TRAC:DATA?
and a wait period. I have several things in mind for this device. I would like to:
  1. Test input current for various amplifiers, and on the Softsens sensors,
  2. Measure the DC resistance for various electrode combinations, and
  3. Measure the impedance between 0-100Hz for various numbers of pins in my pin-electrode.

Probably the easiest first test is to do the resistance. That will also give me a chance to measure noise in the measurement. According to IEC 60601-1-4, for non-cardiac, floating ground applications, the limit is 100 μA DC and 10 μAC.

Things to do:

  1. Figure out how to get raw data from the machine
  2. Get labview to plot my data
  3. The grounding configuration...

Posted by torque at April 13, 2004 4:37 PM
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