B. Main Flow
1.
Adjust the front panel controls as follows:
Mode
A/C
R.R.
,
10 BPM
I .T. 3.0
Sec.
Spontaneous flow OFF
2. Remove the reservoir bag (or plug) so that the reservoir outlet is
open to atmosphere.
3. Attach RT-200 to the main flow outlet of the unit using a 24"
adult breathing circuit tube.
4. Adjust RT-200 to read flows.
5. Set the flow on unit and verify that the flow read by the RT-200
is within the tolerance range.
6.
Repeat step (5) for several settings.
NOTE:
Refer to Test Record sheet for settings and their tolerance ranges.
Calibration Method for Main flow
Use the potentiometer R54 on the CPU PC board
(PCB410A) to
make adjustments in the flow. If the flow cannot be calibrated with
R54, then use the flow potentiometer on the flow control assembly
and adjust as explained in the following steps.
1.
Set R54 in mid-range so that it could be used for fine flow
adjustments during calibration.
2. Loosen the set screw on the potentiometer mounted on the
assembly so as to disengage it electrically from the main flow
assembly.
3.
Adjust the display to read the same as the actual flow read by
the RT-200, by turning the shaft of the potentiometer manually.
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