Part No. 715-0080, Rev. B
- 72 -
SECTION 9: CALIBRATION PROCEDURES
The following calibration procedures should be performed only by a person who is experienced in
electronics and has the proper test equipment. The entire system can be calibrated using the System
Calibration Procedure. Individual board calibration procedures (i.e. Control Board Calibration and
Display Board Calibration) should be performed after a board has been repaired. In order to perform
any of the calibration procedures, the circuitry must be accessed (refer to SECTION 8 for instructions
on accessing the electronics compartment).
CALIBRATION TEST EQUIPMENT REQUIRED
Four Digit Digital Voltmeter
Variable DC voltage power supply 10 - 20 volts at 10 amperes min
Oscilloscope
Resistor decade box
1% accuracy
3 Clip lead jumpers (preferably one red and two black)
10
k
resistor
Airborne temperature test circuit P/N 387-1190 (Available from International Biomedical)
Airborne sensor simulator P/N 387-1191 (Available from International Biomedical)
Calibrated digital temperature measuring device 0.1
C accuracy
SYSTEM CALIBRATION PROCEDURE
The following procedure should be used to calibrate the system after repairs or during routine
maintenance.
1. Locate
the
J2
connector on the control board and connect the sensor simulator connector. If
not using a sensor simulator, leave airflow tray connected to
J2
. Ensure
JP1
on the control
board is set to route the Secondary Thermistor to the display board’s “measured temperature”
input (jumper
JP1
should be on positions 1 and 3). Connect the incubator to an appropriate AC
power source. Check the voltage at the positive battery terminal. It should be approximately
13.7
0.2 volts with a fully charged battery.
2.
Check the voltage at
TP1
on control board. It should be 13.7
0.1 volts with a fully charged
battery. Adjust
R1
if necessary. The
BAT CHG
indicator should be on.
Summary of Contents for AirBORNE A750i
Page 1: ...A750i Transport Incubator Service Manual...
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