Chapter 4— TEMPERATURE, HUMIDITY, AND PRECIPITATION 



Figure 4-11. — AN/GMQ-29( 

 group. 



209.394 

 ) Converter display 



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209.395 

 Figure 4-12. — Air temperature sensor ML-641/ 

 GMQ-29( ). 



209.396 

 Figure 4-13. — Dew point sensor ML-643/GMQ- 

 29( ). 



DATA RECEIVER AND CONTROL ASSEM- 

 BLY. — This unit is contained in a slide-mounted 

 drawer which provides access to all parts of 

 the assembly from the front of the display 

 unit. Contained within the drawer are the dis- 

 play station power supply, electronic equip- 

 ment for data reception and computations, and 

 the control panel. (See figure 4-14.) Data elec- 

 tronic equipment is contained in a circuit card 

 cage. Also included are a time-of-day clock 

 module and an internal digital voltmeter. The 

 control panel, mounted just inside the drawer, 

 has provision for control of power, selection 

 of system calibration, setting of the time clock, 

 resetting stored maximum and minimum tem- 

 peratures and rainfall, and digital input and 

 control. 



READOUT PANEL. — The readout panel con- 

 tains digital displays for time of day, tempera- 

 ture, dew point, maximum and minimum 

 temperatures, wind speed (averaged), wind di- 

 rection (averaged), and the digital voltmeter. 

 (See figure 4-15.) Each display consists of 

 sufficient digital readout lamps to display the 

 data. 



65 



