AEROGRAPHER'S MATE 3 & 2 



temperature is between 180° and 210°. Time 

 and temperature may vary; therefore, always 

 follow the manufacturer's instructions. Feed 

 the material into the machine with the original 

 on top, adjusting the speed of the machine so 

 that a clear print is obtained. 



Printing speed is dependent on the trans- 

 lucency of the original and the density of the 

 opaque image, also on the type of sensitized 

 material used. 



Stopping The Machine 



When stopping the machine, turn the ammonia 

 flow off, then feed a sheet of porous wrapping 

 paper 16 inches wide into the machine. Stop 

 the machine with the paper in position around 

 the printing cylinder and between the sealing 

 sleeve and the perforated tank. This will pre- 

 vent the sleeve from sticking to the perforated 

 tank top and will also protect the belts from 

 the heat of the cylinder while it is cooling. 



Adjustments and Maintenance 



Normally, when the machine is first installed, 

 no adjustments are required. Occasionally, how- 

 ever, some readjustments may be necessary 

 due to atmospheric changes which may cause 

 shrinkage or expansion of some of the belts. 

 These adjustments should be performed in ac- 

 cordance with manufacturer's instructions and 

 then only by qualified personnel. Maintenance 

 is required on a periodic basis. Specific daily, 

 weekly, monthly, semiannual, and annual main- 

 tenance tasks are required and are outlined in 

 the manufacture's instructions. 



Safety Precautions 



1. Ammonia is a toxic solution so ensure 

 proper ventilation. 



2. Handle the lamp assembly with great care. 

 It is fragile and expensive. Do not attempt to 

 remove the lamp from the machine until it has 

 cooled. Always rest the lamp assembly flat 

 on a table; never stand it on end. 



3. During machine operation, the ammonia 

 feed regulator should never be turned completely 

 off. If the machine is left running and no moisture 

 Is entering the developer section, the evaporation 

 tray and heater rods are likely to be warped 

 due to excessive heat. 



LOCAL DISSEMINATION EQUIPMENT 



Many hours of valuable time are needed 

 during the normal course of the day to dis- 

 seminate local weather conditions and forecasts. 

 To aid in the dissemination of pertinent data, 

 most weather offices use the telephone and the 

 Code-A-Phone. 



CODE-A-PHONE 



The Code-A-Phone in most weather offices 

 is used to record the daily forecast, local warn- 

 ings, tidal, and astronomical data. The amount 

 and type of data to be recorded will vary, de- 

 pending on the needs of the office and the 

 length of tape supplied with the equipment. The 

 recorded data is usually updated at 6 hour 

 intervals to coincide with the Aviation Forecasts. 

 It may be revised more often as weather con- 

 ditions dictate. The Code- A- Phone has proven 

 to be invaluable in this capacity. 



The typical Code-A- Phone, as shown in fig- 

 ure 8-3, is a self-contained instrument. It op- 

 erates on the same principle as a tape recorder. 

 The mouth piece acts as the microphone and 

 the ear piece as a listening device. Most Code- 

 A-Phones have a playback and an automatic 

 answering capability. The playback capability 

 enables the individual to check the tape for 

 errors after making the recording. The auto- 

 matic answering capability permits the caller to 

 dial directly into the weather office and receive 

 the recorded information without anyone answer- 

 ing the phone. This saves time for the caller 



RECORD SWITCH 



RECHECK SWITCH 



AUTOMATIC SWITCH 

 OFF/ON SWITCH 



RECORD 

 BUTTON 



209.432 

 Figure 8-3. — Typical Code-A-Phone. 



152 



