Section 5 Adjustment And Calibration Procedures - Dräger Narkomed 2B Service Manual

NM2B
CAUTION: Based on information supplied by the cylinder regulator manufacturer,
when the regulator is used for gases other than N2O or CO2, its output pressure will
decrease 0.5 psi for every 100 psi increase in cylinder pressure above 1000 psi.
Currently, these regulators are calibrated at 47 psi with a cylinder supply of 1000 psi.
If a 2000 psi cylinder is then installed, the regulator output will be 42 psi. This
change in output must be compensated for to provide accurate performance
throughout the cylinder's working range.
NOTE: Cylinder pressure compensation for the N2O regulator is not required.
Cylinder
Pressure (psi)
2000
1800
1600
1400
1200
1000
* Canada Settings
NOTE:
Open the O2 cylinder valve, install a breathing circuit with test lung to absorber, and
make the following settings:
MAN/AUTO selector to AUTO
Ventilator:
Set the Fresh Gas flow to 10 L/min.
Turn on the ventilator. While the ventilator is cycling, press the O2 flush button and
verify that the Lo O2 Supply alarm is not activated. If the alarm is activated, refer
to Section 5.2 for Oxygen Supply Pressure Alarm Switch Adjustment.
Rev. U
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ADJUSTMENT AND CALIBRATION PROCEDURES (continued)
Compensated Regulator
Output Setting (psi)
42 (*45)
43 (*46)
44 (*47)
45 (*48)
46 (*49)
47 (*50)
If the O2 cylinder regulator is adjusted according to the chart,
perform the following test to verify that the Lo O2 supply alarm is
not activated during ventilation.
FREQUENCY: 10 BPM
I:E Ratio: 1:2
Tidal Volume: 1400 mL
PLC: MAX
INSP FLOW: HIGH
5-2A
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Compensated Regulator
Output Tolerances (-4, +2)
38 - 44 (*41 - 47)
39 - 45 (*42 - 48)
40 - 46 (*43 - 49)
41 - 47 (*44 - 50)
42 - 48 (*45 - 51)
43 - 49 (*46 - 52)