Vaisala DRYCAP DMT340 SERIES Guia do Utilizador Página 73

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Chapter 4 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 73
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 11
below. The period for the trend and max/min calculations depends on the
selected graph window as follows:
Table 11 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
4 year* 12 days
* Shows the maximum logging period of the data logger module (available when data
logger module is installed)
Use the following functions in the graphical display:
- Press the NEXT button to change between the trend graph and
max/min graph for the quantities selected for display.
- Press the EXIT button to return to the basic display.
- Press the ▼▲ arrow buttons to zoom in and out in the graph window.
- Press the ◄► arrow buttons move the cursor (vertical bar) along the
time axis. The cursor mode allows you to observe individual
measuring points. The numerical value at the cursor position is shown
at the left upper corner. The right upper corner shows the time from
the present to the chosen moment (without the logger module), or the
date and time at the cursor position (when the logger module is
installed).
- If the optional data logger module is installed, you can scroll the
cursor off the screen to move to a new point on the time axis. The new
date will be displayed, and the cursor will be centered at the date
where the cursor scrolled off the screen.
0706-030
Figure 49 Graphical Display with Data Logger
The time that is shown below the graph is adjusted with the current time
offset of the transmitter. If you change the transmitter's date and time
setting, the displayed timestamps in the history graph change
accordingly. For an explanation of the effect of changing the date and
time manually, see section Data Logger Module on page 66.
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