VIII. MAINTENANCE AND SERVICE- CONT.
43
2- CALIBRATION MENU OVERVIEW
WARNING: Improper changes made in the Calibration menu can be detrimental to
the performance of the ventilator.
The CALIBRATION menu can be accessed only from the SETUP menu. The CAL Menu is designed to aid service
personnel in the testing and calibration of the ventilator. A password is required for some calibration procedures to prevent
unauthorized or untrained personnel from gaining access to these procedures as changes made can affect the operation of the
ventilator. It is possible to exit the CAL menu and return to normal operation at any time by pressing the MAIN MENU
key. When returning to the MAIN menu from the SETUP or CAL menus, the ventilator may not cycle due to invalid
settings caused by changes to those settings made during test or calibration procedures. When the MAIN MENU key is
pressed, a reminder to reset parameters is displayed prior to returning to the Main Menu to help avoid this.
BATTERY
(Password required) This function is used to acclimate the battery gas gauge to a new battery when it is installed. Refer to
the instructions for battery removal and replacement under Disassembly and Reassembly Instructions in this manual for
further details.
WARNING: This function should only be used on a discharged battery. Using it
otherwise can adversely affect the accuracy of the gauge.
PRESSURE TRANSDUCER
(Password required) Used to calibrate the pressure transducer for accurate display of airway pressure. Refer to the
Pneumatic Calibration section later in this manual for detailed instructions.
FLOW CALIBRATION
(Password required) This allows for the calibration of the flow that is set by the Flow Knob on the front of the Crossvent.
Flows are set and the flow value displayed here is compared with the actual flow being delivered as measured by a test
instrument. Refer to the Pneumatic Calibration section later in this manual for detailed instructions.
TOUCHSCREEN (CALIBRATION)
This function is used to calibrate the x and y coordinates for the touchscreen. This is only necessary when a new touchscreen
is installed or this calibration is lost due to a failure in the memory of the Crossvent. To calibrate the touchscreen, press
TOUCHSCREEN in the Calibration menu. Four boxes will be in the corner of the display. Press the center point where the
corners of these boxes converge. When the software registers the location that is pressed, these boxes will be replaced by a
second group of boxes in the opposite corner of the display. Press the center of these as before. When the second point of
reference has been registered, the calibration is complete and “CALIBRATED” is displayed. The unit then returns to the
Calibration menu.
CAUTION: Pressing anywhere other than the converging points of these boxes may
improperly calibrate the touchscreen.
KEYS (TOUCHSCREEN TEST)
Displays the Key Test menu. It is used to determine that the touchscreen is operating properly. Starting near the upper left
corner of the display, press several points as you move diagonally across the display towards the CAL MENU key. The
values for the x and y coordinates for each point pressed should increase. If not, there is a problem with the touchscreen and
it should be recalibrated. If calibrating does not fix the problem, then it should be serviced. Press the CAL MENU key to
end this test and return to the CAL Menu
DISPLAY (LCD) TEST
Tests all the pixels in the display by illuminating 16 boxes containing the 16 colors used by the Crossvent as shown below.
Press anywhere on the touchscreen to end the test and return to the Calibration menu.
BLACK BLUE GREEN CYAN
RED MAGNENTA BROWN
GRAY
GRAY
BLUE
GREEN
CYAN
LIGHT RED
LIGHT
MAGENTA
YELLOW WHITE
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