Vaisala vLog 4.4 - Manual (Page 102)

Troubleshooting
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• The next calibration date
• Security information (to prevent unauthorized calibration or manipulation
of the data in the logger).
Does the software account for daylight savings time changes?
Yes. Daylight savings time changes are automatically accounted for in all graph
and tabular displays.
How many logger files can I overlay onto the same graph?
You can overlay many channels of data onto the same graph; in testing, we in-
serted more than 100 channels successfully.
Do all graphs have to be created from one data logger?
No. You can create graphs using files from different data loggers and different
data logger models.
I have a version of vLog earlier than version 4.10. What happened to that Ver-
ification process? And why, in Version 4.10 and later, has this been replaced
by the Logger File Creation Report?
In Veriteq vLog, logger data and graph files can be generated at different times
by different people. Consequently, there is a need for verification that the log-
ger files used to create graph files are the right ones—and are not ones that have
been created by somebody else. This has been handled in vLog versions prior
to version 4.10 by the verification process that required a transfer username and
password to be entered in order to verify graphs.
The Logger File Creation Report is a more flexible approach that provides the
same assurance by allowing users to compare the printed records they have
against the logger files they are using to create graphs. Correlation between
Logger file and Logger File Creation Report is further assured by the Logger
File ID Number, a unique automatically-generated checksum value.
How can I verify a graph on the screen if I have forgotten my password (the one
I chose when transferring the logger file as on page 48)?
You can’t. Veriteq vLog software requires the original password to be used
when transferring the data logger in order to verify the status of the file. This is
a security feature for validation to ensure that the person responsible for trans-
ferring the data is also the person who creates the graph. For vLog 4.10 and lat-
er, the username and password feature is optional and can be turned off.