(3) Charge the defibrillator in the 360j position and fire it into the defibrillator
tester and also take note of the reading on the display. Let us assume it reads 280j against
340j displayed on the defibrillator tester.
(4) Repeat the operation at 30j setting. Let us assume the delivered energy
reading is 22j against 30j on the defibrillator tester.
(5) Comparing the readings of low and high energy, both appear low. This is
an indication that the calibration control (R132) needs adjustment.
(6) Set the energy selector of the defibrillator to 200j and charge and fire into
the defibrillator tester. During the display time (eight seconds), adjust R132 until a close
reading to that of the defibrillator tester is obtained.
(7) After completion of the 200j adjustment, check readings at 30j and 360j.
They should fall within 15 percent +1 digit of the defibrillator tester indication.
Let us assume now a different condition exists: Readings on the high energy
levels are above or below the error limit.
(8) Keep the energy setting of the defibrillator at the extreme where the
readings show the worst error.
(9) Charge and fire into the defibrillator tester repeatedly. Between firings,
adjust R140 a 1/8th turn at a time until your error seems to be corrected.
corrections explained earlier.
The third possible error may be as follows: All delivered energy readings are
correct with the exception of 5j and 10j. This indicates that a dc offset is
present and is percentage-wise most important on the low reading.
(11) Adjust the setting of R160 (balance) slightly.
This concludes the calibration procedure for the delivered energy section. The
other three display digits for selected energy are mounted on this pcb board for
The voltages of selected energy display are referred to real, not floating,
ground. Up to 1360vdc may be present between the two groups of display