Vaisala vLog 4.5 Manual do Utilizador descarregar pdf (Página 118)

Glossary

112

Relative humidity

Relative humidity is the measure of the amount of water

vapor in the air compared to how much it can possibly hold at

that temperature. A relative humidity of 50% means that the

air contains only one-half as much water as it could possibly

hold. The capacity of air to hold water is heavily dependent

on the temperature of the air. The colder the air, the less

water it can hold. Air at 50°F can hold only one-quarter the

amount of water as air at 95°F

Sample

A measurement reading that is stored to data logger’s

memory

Sample smoothing (deadband)

A setting in vLog (Tools | Options | Insert tab - Sample

smoothing) that controls how the samples in a logger file are

interpreted when they are inserted into a graph. Sample

smoothing (or sample deadband) is the minimum change in

the input signal required to cause a change in the displayed

channel values. Sample smoothing is used to dampen the

effects of noise, and is defined in terms of raw analog-to-

digital converter counts.

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

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Vaisala vLog 4.5 Manual do Utilizador Página 118