Vaisala vLog 4.4 - Manual (Page 106)

Glossary
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Sample interval The sample interval is the rate at which the logger takes and records readings
to memory. The sample interval applies to all enabled channels on the logger.
You may want to occasionally change the sample interval on the logger
because:
• Faster sample rates may be required by the application
• You need to record readings over a longer duration
• You want to minimize the collection of unnecessary data
Scale The range of values a graph displays
Secure The status of an on-screen or printed graph file (.spg) that has been created
in Veriteq vLog using data from a Veriteq VL-Series Data Logger. Although
Veriteq vLog displays graph files produced from Veriteq Spectrum data log-
gers, they are labeled Not Secure. Only Veriteq VL-Series loggers produce
secure files.
Serial port The communications port to which you can attach devices such as a modem,
mouse, or serial printer to the computer. The serial communication ports on
the computer are commonly referred to as COM1, COM2, COM3, and so on.
Serial ports exchange data sequentially, one unit at time.
Stability The ability of a sensor or measurement instrument to maintain its perfor-
mance characteristics over a specified period of time
Thermistor A temperature-sensing element (a thermally-sensitive resistor) composed of
sintered semiconductor material that exhibits a large change in resistance in
proportion to a small change in temperature. The relationship between tem-
perature and resistance is approximated for most thermistors by the Stein-
hart-Hart equation.
Traceable Capable of being traced back to a recognized measurement standard or ref-
erence
Transfer The term used when the software makes a copy of the data contained in a
connected data logger. The transfer process creates a file on the PC but does
not affect or delete the data on the logger. Other terms commonly used to
describe the transfer process are download, upload, backup, or copy. Trans-
fers can be performed one logger at a time or in batches.