A-A-54368 Defibrillator And Cardioscope (Three Lead, Portable, With Charger)This commercial item description covers a cardiac care system suitable for use on patients experiencing cardiac crisis and for examining the electrical activity of the heart, with a means to produce a permanent record of the heart activity in the three standard ECG lead formats.

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A-A-54368

Defibrillator Paddle Insulation test.

a. Apply aluminum foil to the entire gripping surface of one paddle with sufficient pressure to make it conform to the surface.

NOTE: The gripping surface for verification purposes is defined as the approximately cylindrical area around each handle where the operator’s fingers grasp the paddle, but not beyond any barrier or curvature that is obviously intended to limit hand placement, including areas one inch in diameter centered on any control located on the paddle, representing the location(s) of the operator’s thumb and/or finger.

b. With the paddles connected to the defibrillator, connect the high potential lead of a 60 Hz (or 50 Hz, if preferred) high potential test source to the aluminum foil. Connect low-potential or ground lead to the paddle electrode. Slowly adjust the peak voltage amplitude of the test source to equal 1.5 times the maximum voltage occurring on the defibrillator energy storage capacitor. For a sine wave this corresponds to an rms value of 1.06 times the capacitor voltage. Maintain this voltage for 1 minute. Repeat this test with the low-potential lead connected to the other paddle electrode.

c. There shall be no voltage breakdown, and the 60 Hz leakage current shall not exceed 250 microampere peak (177 microampere rms); if a 50 HZ test source is used, the current shall not exceed 210 microampere peak (148 microampere rms).

NOTE : Any leakage current that flows when the high-potential lead is disconnected from foil, but the output voltage is set as described in paragraph b above, represents internal leakage of the test apparatus and may be subtracted from the total current reading. Alternatively, an external ammeter may be placed in the ground circuit to eliminate this internal leakage and to enhance resolution, if necessary.

Repeat steps as described in paragraphs a, b, and c above, using the other paddle grip.