American Magnetics 187 Self-Compensating Liquid Level Controller - Manual (Page 16)

5
Introduction
Instrument/Sensor System Diagram
1.4 System Diagram
SENSOR CABLES
RG-59/U COAXIAL
150 FEET MAXIMUM LENGTH
FRONT PANEL MODEL 187
LIQUID LEVEL
CONTROLLER
REAR PANEL
32:(5
2))
+,
/2
0RGHO  0RGHO 
/LTXLG /HYHO /LTXLG /HYHO
&RQWUROOHU &RQWUROOHU
$0, $0, $
%
),//
(6&
81,76 (17(5
237,21
 Г +,  Г /2
 Г %  Г5$7(  Г /(1
 Г ),//  Г087( Г&200
 Ã &$/
 Ã $
0(18
O
2
/HYHO  
PLQ 
- -
&21752//(5 287387
/,1( 92/7$*( $ 0$;
$0(5,&$1 0$*1(7,&6 ,1&
2$. 5,'*( 71 86$
- ,(((
56
- - - - - -
*$6 5() /,4 5() 352%( *$6 5() /,4 5() 352%(
2873876 ,13876
6(/(&725 6:,7&+ ,16,'(
/,1(  +] $ 0$;
 9  9

SOLENOID-OPERATED
FLOW VALVE
(OPTIONAL)
LIQUID REFERENCE
PLATE CAPACITOR
VAPOR REFERENCE
PLATE CAPACITOR
CONCENTRIC-TUBE,
CAPACITANCE-BASED
PROBE
MAXIMUM
MEASURED
SPAN
MINIMUM
ZERO
OFFSET
Figure 1-1. Model 187 instrument, control valve, and sensor system diagram.