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Quick Visual of Results

vLog VL interface includes horizontal bars that move automatically with min, max, and avg values. Superimpose up to 4 indicators wherever you want-set the value, units (temp or RH), label, and color for each indicator.

Detailed, Customizable Graphs 

Add statistics such as min, max, and avg values, max minus min value, max minus avg value, avg minus min value, group statistics to your vLog graphs. Use more explanation in the signoff area with up to 6 lines of text to describe the run.

Industry-standard Security Control

vLog VL supports up to 3 levels of security-Windows user names and unique passwords (Windows Active Directory). Use domain level or local account authentication.

File Security Status Indication for 21 CFR Part 11 Compliance

Security status of the data is identified on every report. Know whether files are secure or not, or if files have security problems or tampering issues. 

System-wide Traceability

Built-in audit trail report generator creates reports for all logger data or for a time you specify. No interaction with the system goes unrecorded.

Time Saving Batch Setup

A settings from one logger in additional data loggers-start and stop time, sample interval, logger and channel descriptions, and channel flags.

Detailed Graphical & Tabular Reports

Use the graph overlay to highlight relationships between files, or use zoom or cursor pin-point to highlight actual values, times and dates. See sample report.

Horizontal lines dynamically track min, max, avg -or add your own.

Reports are presentation-quality.

Easy Data Transfer

Copy and paste or export graphs, TXT and CSV files into other Windows and/or database applications

Quickly, conveniently download data from your loggers, using automatic filename creation with descriptive naming.

Easy Logger Configuration

Software allows you to quickly set up multiple loggers with similar properties, or set each logger individually. Set sample rates, synch start/stop times, enable/disable channels, set user-defined measurement units, and adjust memory modes (stop when full, wrap-around when full, etc.)

Flexible Graph Scaling

Customize graphs with manual or automatic scaling, multiple Y-axes, selectable decimal place precision, temperature unit display options (°C or °F), and user-adjustable International date and time formats.


Vaisala vLog  is secure and easy-to-use validation system with a Windows-based interface for configuring, downloading, displaying, analyzing and reporting information from Vaisala data loggers. vLog software is compatible with 32-bit and 64-bit versions of Windows® XP, Windows Server® 2003, Windows Vista®, Windows Server® 2008, Windows® 7, and 32-bit Windows® 2000.

The vLog IQ/OQ protocol provides assurance that the system has been properly set up, is functional, and operating with integrity, security and reliability.  The Installation Qualification (IQ) protocol has been designed to ensure that the system, comprising hardware and software, has been installed correctly. The Operation Qualification (OQ) protocol verifies that each component of the system performs as intended.  Please view our Draft IQOQ and contact us if you have any questions.

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