
NM2B
ADJUSTMENT AND CALIBRATION PROCEDURES (continued)
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)
Compensated Regulator
Output Setting (psi)
Compensated Regulator
Output Tolerances (-4, +2)
2000
42 (*45)
38 - 44 (*41 - 47)
1800
43 (*46)
39 - 45 (*42 - 48)
1600
44 (*47)
40 - 46 (*43 - 49)
1400
45 (*48)
41 - 47 (*44 - 50)
1200
46 (*49)
42 - 48 (*45 - 51)
1000
47 (*50)
43 - 49 (*46 - 52)
* Canada Settings
NOTE:
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.
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:
FREQUENCY: 10 BPM
I:E Ratio: 1:2
Tidal Volume: 1400 mL
PLC: MAX
INSP FLOW: HIGH
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
5-2A
Содержание Narkomed 2B
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