Preventive Maintenance
96
4.6.2.8 External Flow Sensor Calibration
(Skip to Step 5 if already in the Main menu.)
1 Enter the Service Software by pressing the following keys prior to the end of the startup routine:
a
SET
b
OPT.
c
d
OK
2 Select KEYCODE to enter the diagnostic screens.
3 Enter a valid key code to invoke the service software.
4 Advance from this window to the main menu by pressing ENTER.
5 Select TEST MENU.
6 Select MISC.
7 Activate the patient module heater by pressing the HEAT key.
8 Switch to the P, O
2
, °C screen and monitor the temperature. When a tem perature higher than
30 °C is reached, select QUIT twice to return to th e MAIN menu.
9 Select FLOW EXT to enter the External Flow Sensor Calibration screen.
Fig. 44 External Flow Sensor Calibration screen
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