Vaisala DRYCAP DMT346 Guia do Utilizador descarregar pdf (Página 57)

Chapter 4 _________________________________________________________________ Operation

VAISALA________________________________________________________________________ 55

Graphic History

The graphical display shows the data trend of the selected quantities,

one at a time. The graph is updated automatically while measuring.

Use the following functions in the graphical display:

- Press the NEXT button to have the trend graph and max/min graph

in turns.

- Press the EXIT button to get back the basic display.

0605-037, 0605-038

Figure 36 Graphical Display

Trend graph: Shows you a curve of average values. Each value is a

calculated average over a period. See Table 10 below.

Max/min graph: Shows you the minimum and maximum values in a

form of curve. Each value is max/min over a time period. See Table

10 below. The period for the trend and max/min calculations depends

on the selected graph window as follows:

Table 10 Periods for Trend and Max/Min Calculations

Observation Period Period for Trend/Max/Min

Calculations (Resolution)

3 hours 1.5 minutes

1 day 12 minutes

10 days 2 hours

2 months 12 hours

1 year 3 days

- Press the ▲▼ arrow buttons to zoom in and out the time in the

graph window.

- Press the ◄► arrow buttons to have a cursor mode where you can

observe an individual measuring point. Press an arrow button to

move a cursor (vertical bar) along the time axis. The numerical

value at the cursor position is shown at the left upper corner. Time

from the present to the chosen moment is shown at the right upper

corner.

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Vaisala DRYCAP DMT346 Guia do Utilizador Página 57