This book covers all models in the E/B series of stabilised bench power supplies. The series offer a choice of output voltage and output current. By use of a slider switch the precision analogue meter is used to display output voltage or output current. A push button switch is used to turn the power supply on and off. A green LED is used to indicate the power ‘on’ condition. A 10 turn precision potentiometer is use to vary the output voltage over its range from near zero to its maximum rating. The power supply is protected against current overloads by electronic current limiting preset at approximately 110% of the nominal output current rating. In operation this circuit remains approximately constant. On removal of the overload the output will reset to its original value. The current limit condition is indicated by a red LED near the output terminals. The power supply incorporates circuitry that gives limited protection against the application of external voltages in the reverse and forward mode and thus the unit may be used for battery charging and parallel applications.