CALIBRATE THE NONFADE CIRCUIT
Perform the following procedures to calibrate the nonfade circuit.
a. Check and Adjust the Linearity. Refer to Appendix E, Monitor Board Power
Supply Schematic, sections C-23 and C-24.
Apply an ECG signal to the input of monitor.
Check the horizontal width for correct adjustment.
Adjust both linearity controls R216 and R217 for the best linearity of trace.
b. Calibrate the Delayed Analog Signal. Refer to Appendix B, Monitor Board
Analog Schematic, section D-10.
Apply an ECG signal to input of the monitor.
Adjust R141 for proper level on the chart recorder.
CALIBRATE THE DEFIBRILLATOR BOARD
Perform the following procedures to calibrate the defibrillator board.
Potentials of approximately 1.4kvdc are present on the defibrillator board.
a. Calibrate the High Voltage. Refer to Appendix G, Porta Pak 90 Defibrillator
Schematic, section C-10.
(1) With a digital voltmeter (with appropriate attenuator for 1500vdc) connected
at J1, pin 3 (-) and pin 5 (+), turn on the power. Be sure that the standard paddle set is
connected at J10.
(2) Select 200j energy level and activate the charge button. The meter should
read 1170v when the ready light comes on. If not, then R111 should be slowly adjusted
clockwise or counter clockwise until the voltage reads 1170v.
(3) Press the disarm button and select energy levels progressively from 5j.
Check the voltages. The voltages will all be within 2.0v if R111 was carefully set. Check
for the following (table 1-1).