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HOT PACK
The 1040-4B serves as a high voltage and/or current source to test or high-pot telephones, intercoms or electrical appliances. It will also destroy many wiretaps. A DC-DC inverter supplies over 1,000 volts via the OUTPUT LEVEL control. A momentary ON/OFF switch serves as both a safety device and battery saver. The negative side of the supply is tied directly to the BLACK - terminal (not the case) while the positive output is derived from the center contact of a potentiometer. In operation, the RED + terminal may be varied from 0 to over 1,000 volts DC (no load condition). Voltage and current output of the 1040-4 is a direct function of the resistive load applied. Both terminals float free of the case. OPERATION: Insert the red and black test leads supplied into the appropriate colored jack. Use a multimeter that can measure 1,000 volts and connect the red clip from the 1040-4 to the positive lead of the multimeter and the black clip to the black lead. Eight "AA" Alkaline batteries power the 1040-4. The batteries should be replaced when it takes longer than ten seconds for the DC-DC inverter (voltage) to stabilize. To replace the batteries, remove the two cover screws and lift off the cover. Remove and replace the old batteries with fresh Alkaline batteries. Replace cover and screws. Don't over-tighten.
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MAKE SURE YOUR HANDS ARE WELL AWAY FROM THE TEST LEADS! Hold the momentary ON switch UP for a few seconds and adjust the output to roughly 1,000 volts. Connect the wires from the 1040-4 and multimeter to the lines under test. Hold UP the ON switch and note the voltage. Any decrease in the voltage reading means that a current path exists. Use normal search techniques to find the leakage/current path.