SR830 data storage
in [LabView]
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From: pankajain on 6 May 2008 01:10 I am planning to develop the C-V measurement set-up of MOS capacitors using SR830 lock-in amplifier. I am using 2 instruments in my experiment. One is the source meter with the help of which I am providing a linear voltage ramp from -10 to +10 volts to the MOS capacitor.I want to store the corresponding values in the channel 2 of the lock-in. I have the labview drivers for the SR 830 lock-in. I am using the data storage vi for storing the data. I want to plot this data from the lock-in (y axis) vs the data from the source meter (x axis). The problem is that the variation in the channel 2 is very small in milli volts whereas the data storage vi captures the values only in volts. The values in the instrument can be changed from volts to millivolts but the data storage vi captures the values only in volts. As the values are very small, the data storage vi is showing constant values (for eg. 0.002 volts) whereas the values are actually varying from 2.1 mV to 2.9 mV. I hope you understand the problem. Please reply.
From: GerdW on 6 May 2008 03:10 Hi pankajain, change the "data storage vi" to save more digits! :smileywink:Well, you gave a lot of information, but not exactly the needed...Either attach the "data storage vi" so we can have a look at it.Or search for some format codes in the vi. Set them to "%.6g" (or similar...).
From: pankajain on 6 May 2008 04:40 Thanks for your reply. Actually I am new to labview. I am attaching the data storage.vi. Please have a look at it. Kindly suggest me a solution
From: mathan on 6 May 2008 04:40 Dear pankajain, You have missed the attachment.:smileysad: Mathan
From: pankajain on 6 May 2008 04:40
Sorry I forgot to attach the vi. sr830.llb: http://forums.ni.com/attachments/ni/170/321279/1/sr830.llb |