The voltage across the sensor must be between 8V and 36.0V. The supply polarity is diode protected but J1.1 must be plus and J1.2 must be minus to operatate correctly.
The equation to determine the maximum load resistance for RL is as follows: RL max = (Vsupply  8) / 0.02
Example: Maximum load resistance at 24 volt supply is (24  8) / 0.02 = 800 ohms
To determine the load resistance RL for a single sided 010 volt meter that reads the voltage across the load resistor. 10 volts / .020 mA = 500 ohm resistance. The supply voltage VSupply must be greater than 18 volts (10 across the resistor plus 8 across the sensor) and less than 36 volts.
For best performance operate the sensor as follows: Null (rotate sensor in slot) is set at 13mA, 45 arcdegress is 5mA, and +45 arcdegrees is 21mA. The sensor to 420 mA converter becomes nonlinear below 5mA.
General Specifications:Range: +/ 50 degrees Resolution: .001degree
Linearity:

Typical Accuracy: +/ 0.5% FSO
Temperature: Tc of Null: 0.008 arcdegrees per degree Celcius Tc of Scale: 0.1% per degree Celcius Time Constant: 0.3 Sec

PIN ASSIGNMENTS 

Pin designations 
Description/Function 
J1.1  Supply Voltage High (in) 
J1.2  Supplay Voltage Low (in) 