Groov View Trend issues

The time stamps of the data will be the same for 2-3 seconds.
Once it occurs, it occurs several times at short intervals.
What caused it?

I’m not sure off the top of my head. Have you changed the default scan rate on the device you’re trending?

I changed period is 4 weeks and update Interval is 1 second.

4 months at 1 second? Why so fast?

I meant the scan rate of your device, not your trend. If you’re not sure, it’s probably still the default 1 second scan interval. In your device configuration, the scan interval appears here:

Device scan Interval is 1 second.

I have a history of instantaneous flow rates.

I have seen this too when I have exported the data.