4.3 Front Panel Controls - Chart Recorder Section 

 Refer to Fig. 4.2 



1. AC Power Connector - centre pin grounded to case. 



2. LF Channel Output - LF signal present at these 



terminals . 

 - also used for zeroing chart re- 

 corder LF Channel . 



3. LMA Channel Output - LMA signal present at these 



terminals <, 

 - also used for zeroing the chart 

 recorder LMA channel . 



4. Chart Speed Selector - Select 'Time Base' chart speed. 



Used in 50 mm/sec . position 

 when 'Proportional Drive' is 

 used. 



5. Chart Recorder Connector - used to connect the Chart 



Recorder section to the 

 Electronic Control Section. 



6. Proportional Drive Selector Switch - synchronizes 



chart speed to 

 rope speed. 



- should not be 

 used at speeds 

 less than 10 ft/ 

 min. ( .05 m./s .) 



- requires selec- 

 tion of the 50 

 mm/sec . time 

 base on the re- 

 corder. 



The chart recorder controls for position and sensitivity 

 are used to adjust and calibrate the chart record. The 

 variable sensitivity potentiometers should be in the xl 

 position at all times. The multi position sensitivity 

 switches should be set as follows: 



A-20 



