Datex-Ohmeda 7100, Техническое справочное руководство

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5 Troubleshooting
1006-0836-000 02/03 5-19
5.4.5.B VMB board
evaluation
(Aespire machine)
1. Remove the tabletop to access the VMB pneumatic circuit connections.
2. Remove the ABS and the exhalation valve.
3. Enter the Valves-Test Tool service page and record the bit counts on the
inspiratory and expiratory flow transducers.
4. Connect the calibration orifice test tool ( A ) to the drive gas port (not the
pilot pressure port used for PEEP calibration).
5. Separate the Bellows Module from the Circuit Module.
6. Remove the Flow Sensor Module from the ABS and install it on the
machine .
7. Install the Circuit/Flow Sensor Module.
8. Connect a 22-mm hose from the calibration orifice test tool to the
inspiratory flow port ( B ).
9. Set the inspiratory flow valve to 60 L/min. Gas will exhaust out the rear of
the inspiratory flow sensor where it is normally connected to the circuit
module (reverse flow through the inspiratory flow sensor).
10. Record the change in bit counts observed on the inspiratory flow
transducer channel as compared to step 2 (negative polarity). There may
be some variation in the last digit of the counts, try to pick the average
value.
11. Stop the inspiratory flow.
Refer to Figure 9-9 •
12. Swap the inspiratory channel pneumatic connections (white to black,
black to white)
13. Repeat steps 9 through 11.
14. Move the two inspiratory connections to the expiratory channel of the VMB
(white from harness to blue of VMB pressure transducer, black from
harness to yellow of VMB pressure transducer).
15. Repeat steps 9 through 11 using counts from the expiratory flow
transducer channel.
16. Swap the two inspiratory connections to the expiratory channel of the VMB
(white from harness to yellow of VMB pressure transducer, black from
harness to blue of VMB pressure transducer).
17. Repeat steps 9 through 11 using counts from the expiratory flow
transducer channel.
18. Variation of greater than 40 bits in any of the four measured count
changes indicates a problem with the VMB function.
19. Return to Section 5.4.3.
A
B