AEROGRAPHER'S MATE 3 & 2 



VOLTMETER 

 RANGE SWITCH 



C EED CONTROL 

 SWITCH 



MASTER AC 

 SWITCH 



SYSTEM START 

 SWITCH 



' ' ' ' i , . i 



(S 



-<§> 



TIMER 

 CONTROL 



FLASH FILTER 

 SWITCH 



SIGNAL LEVEL 

 CONTROL 



TONE LEVEL 

 CONTROL 



DARK MAX 

 SWITCH 





Figure 5-12. — Cloud height recorder RO-121/GMQ-13 showing controls. 



209.385 



hubs engaging the two slots of the paper holder 

 in the paper supply compartment so that the 

 paper unrolls from the top. 



3. Pull the paper up and over the top 

 of the recorder, putting the end of the paper 

 in the slot of the take-up roller (See fig. 5-1 3.) 

 Make one or two turns on this roller as in 

 camera film loading. The take-up roller is 

 removed from the take-up roller assembly by 

 pushing the roller to the left and disengaging 

 the nylon drive rachet on the right end of the 

 roller from the drive source. 



4. Close cover and secure cam lock handles. 

 Make sure the paper is flat, smooth, and moist. 



To obtain a cloud height value from the 

 recorder, place the "Dark Maximum" switch 

 in the "ON" position, and read the left-hand 

 edge of the "Dark Maximum" pulse on the 

 paper that corresponds to the angle reading 

 on the lucite window cover. This angle is then 

 converted into a height value from the table 

 posted on or near the equipment. 



Maintenance 



Routine preventive maintenance consists of 

 making weekly checks on the major components 

 of Cloud Height Set AN/GMQ-13( ). Checks 



90 



