Vaisala BAROCAP PTB330 Guide de l'utilisateur télécharger pdf (Page 51)

Chapter 4 ________________________________________________________________ Operation

VAISALA _______________________________________________________________________ 49

Pressure 3h Trend and Tendency

Reading

NOTE

The pressure tendency and trend readings are not available until

PTB330 has been powered up for at least three hours.

Using Basic Display

Figure 30 P

Tendency

Numbers refer to Figure 30 above:

1 = Tendency: Increasing/decreasing graph sym

bol with the code

number (for more information, see Figure 31 on page 50).

2 = P3h symbol

3 = Trend (middlemost numeric value in the example),

that is, pressure change during last 3 hours

Pressure Tendency Graphics and Codes

The characteristic symbols of pressure tendency during the 3 hours

preceding the time of observation are described in Figure 31 on page

50.

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 143 144

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Vaisala BAROCAP PTB330 Guide de l'utilisateur Page 51