Vaisala Hydromet Data Collection Platform - Manual (Page 102)

User’s Guide ______________________________________________________________________
100 __________________________________________________________________M210785EN-E
Unit Conversion in Logging
All internal calculations in the QML logger are done in SI units.
However, you can convert measured or calculated values to another unit
before storing data into the log memory. Typically, these conversions
are made from an SI unit to a US unit, for example, from meters per
second to miles per hour. There are several predefined conversions you
can select from the list. Only those specified for each unit are displayed.
For example, there is no conversion from Celsius to knots. In addition,
only those values can be converted whose unit is known. In most cases
of predefined sensors, Lizard knows the unit. For manual sensors and
generic sensors, you have to specify the unit manually. See section
Setting Unit and Conversion for Manual Sensors on page 162 .
If you download a log file from the QML logger and convert it to a .csv
file, only the converted values can be seen in this file.
In order to make a conversion, select a Log item. Then select the unit
from the conversions available for that item in the Conversion list of
the Log item options frame. For example, in
Figure 45 on page 100 , a
Celsius to Fahrenheit conversion for a temperature measurement has
been selected.
0711-063 Figure 45 Logging View: Unit Conversion