How to Correctly and Safely Use the CROP High Voltage Power Supply

Supplying high voltage to the CROP detectors: Step 1: Make sure the power supply is turned OFF Step 2: Turn the blue knob on top of the supply (the potentiometer) counter- clockwise all the way (to reduce the voltage to zero) Step 3: Connect the detector(s) to the power supply (with the supply turned OFF) Step 4: Turn the power supply on Step 5: Slowly and gradually increase the voltage until you read the desired value on the display screen (take about 10 - 15 seconds to increase the voltage) You can change (increase or decrease) the voltage while the detectors are plugged in and the supply is turned on

Removing high voltage from the CROP detectors: Step 1: When you are ready to disconnect the detector(s) from the power supply, slowly and gradually decrease the voltage until the display screen reads 003 or 004 volts (take about 10 - 15 seconds to decrease the voltage) Step 2: Turn the power supply off Note: The display screen might read “LO BAT” after you have turned the switch off - that is perfectly normal, and the screen will go blank in just a few seconds, and that is when it is safe to disconnect the detectors

Always remember: If the power supply is turned on, do not connect (or disconnect) the detector to (or from) the power supply

Important Information The potentiometer on the top is insulated (plastic) so you will not shock yourself when you are adjusting the voltage Do not touch the plastic high voltage connectors once they are plugged into the supply and the supply is on - any stray pieces of ground wire or high voltage wire might give you a shock There is an LED (light emitting diode) on the top of the supply that will emit a red light when the power supply is ON Contact the CROP staff if the high voltage power supply does not function properly, or if you have any questions or concerns about using the supply