NI Spy Time stamp format

[Shamsan]

I'm Using NI spy. I want to calculate the elapsed time between write and read.
Write 08:50:56.5346
Read 08:50:56.5358
Hour:Mimute:Second
The second portion contains decimal point and 4 digits. What should I consider the fraction? as we know the fraction of a second is the millisecond. 

Thanks

[patrick.o]

Shamsan,

The decimal refers to the accuracy of the second. In the example you posted below, the Write time is 8 hours, 50 minutes, 56 seconds, and 534.6 milliseconds. The 4th decimal digit marks ten-thousandths of a second.

I hope this helps.