Clearing Historical Samples in DL Data Loggers - viewLinc 5.1

Vaisala viewLinc Enterprise Server version 5.1 User Guide

Document code
viewLinc 5.1
Content type
Product description
Product description > Features
Reference information
Document type
User guide

Manage Devices

If your system includes DL data loggers, use the clear history function to:

  • Remove collected data on a DL data logger prior to sending it out for calibration or repair.
  • Remove data collected on the DL data logger during calibration (you can also choose to ignore the interim data when you relink the device channel to a Location in viewLinc).
  • Set DL data logger sampling to Wrap When Full (the required device setting for continuous data collection in viewLinc).

    Editing DL data logger properties (sample interval, sample warmup time, enable/disable channels, calibration settings) automatically clears data history.
  • If you use older models of Vaisala DL data loggers (with gray case) which do not support timebase synchronization, clearing history automatically synchronizes the data logger clock with the viewLinc clock to correct any time drift.

    Over time, the clock time in a data logger begins to differ from the clock time in viewLinc; this is called time drift. Some time drift is expected over long data monitoring periods and is corrected through synchronization. Synchronized timing ensures more accurate data collection results.
    If your DL data loggers are already set to Wrap When Full (by a calibration team or using vLog), clearing of historical samples is not required.
  1. In Sites Manager select the Hosts and Devices tab.
  2. On the Hosts and Devices tree, select one or more DL data loggers (CTRL+click).
  3. Select Configure > Clear Historical Samples.
  4. At the warning prompt, select Clear.
  5. At the confirmation prompt, select OK.