Campbell Scientific CSAT3 CSAT3 3-D Sonic Anemometer - 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). CAUTION SDM address 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) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 EDLOG Datalogger Address (base 4) 00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 CSAT3 Thumb Switch (hexadecimal) 0 1 2 3 4 5 6 7 8 9 A B C D 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 pointing into the wind, it will report a positive ux 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. 5