Campbell FW05 Manuel télécharger pdf (Page 13)

CSAT3 Three Dimensional Sonic Anemometer

3.2 DM Address

Each CSAT3 on the SDM bus must have a unique address. A hex thumb

switch within the electronics box is used to change the SDM address. Remove

the lid and orient the electronics box with the connectors pointing down. The

hex thumb switch is now located in the lower right hand side of the electronics

box (see TABLE 3-1 for SDM addresses).

SDM ad

dress F (hex) is a special address used during

a Group Trigger. Do not set the hex thumb switch to

SDM address F on the CSAT3’s CPU board.

TABLE 3-1. SDM Addressing Scheme

CRBasic

Datalogger

Address

(base 10)

EDLOG

Datalogger

Address

(base 4)

CSAT3

Thumb

Switch

(hexadecimal)

0 00 0

1 01 1

2 02 2

3 03 3

4 10 4

5 11 5

6 12 6

7 13 7

8 20 8

9 21 9

10 22 A

11 23 B

12 30 C

13 31 D

14 32 E

4. Installation

4.1 Orientation

The three components of wind are defined by a right handed orthogonal

coordinate system. The CSAT3 points into the negative x direction (see

FIGURE 4-1). If the anemometer is poin

ting into the wind, it will report a

positive u

wind.

In general, point the anemometer into the prevailing wind to minimize the

amount of data that is contaminated by the anemometer’s arms and other

supporting structures.

CAUTION

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 71 72

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Campbell FW05 Manuel Page 13

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