LabVIEW
Timing for VISA Measurement Device
Hi Ahraar,
@Ahraar wrote:
The current data recorded on excel sheet is random and there are 4 measurements in a second and sometimes there are no measurements for 2 or 3 seconds. I want to configure my device so that a reading is noted in the excel only at one second intervals.
A big problem: you are using the WriteMeasurementFile ExpressVI to write to a XLSX file! This will take longer than you might expect!
A better solution would be to write to a simple CSV file, which is opened once before the loop and closed once after the loop…
When you want to write to the file once per second you might write each 4th iteration of the loop: use Q&R (quotient&remainder) on the loop counter to check for each 4th iteration and place the FileWrite function inside a case structure…
Btw. cleaning up the block diagram will help you and others to understand the code better/easier:
Hi Ahraar,
@Ahraar wrote:
How do i save it to CSV file. In the properties of my 'Write to Measurement file' module, i can select .tdms , .xlsx , .lvm options for file formats.
Use WriteTextFile with FileOpen/-Close before/after the loop. No need for ExpressVIs!
@Ahraar wrote:
Can you also please describe something about how to use the Q and R inside the case structure to record the measurements every one second
Do you know about modulo division? "i modulo 4 == 0" every 4th iteration of the loop…
(Read the help for the Quotient&Remainder function!)
