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Low-Flow Flowmeters (Optional)
For low-flow anesthesia, the NARKOMED
3 can be configured with low-flow, dual-
tube flowmeters for oxygen and nitrous
oxide. These flowmeters function in the
same manner as the standard dual-tube
flowmeters, but are calibrated to provide
greater resolution for low-flow anesthesia.
They are calibrated as shown in the table
below.
Auxiliary Oxygen Flowmeter (Optional)
For the delivery of a metered flow of pure
oxygen (such as for the delivery of oxygen
through a nasal cannula), an optional
auxiliary
oxygen
mounted on the left side of the flowmeter
bank. It is calibrated from 0 to 10 l/min at
an accuracy of ±5% of full scale. This
flowmeter can be used with the machine
turned off.
NOTE: The flow control valve for the
auxiliary oxygen flowmeter does not
include a zero stop. Do not over tighten.
LOW-FLOW FLOWTUBE RANGES & ACCURACIES
GAS
Oxygen
Oxygen
Nitrous Oxide
Nitrous Oxide
flowmeter
can
be
TUBE
Fine
Coarse
Fine
Coarse
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GAS DELIVERY SYSTEM (continued)
Minimum Oxygen Flow
The oxygen dispensing system incorporates
a calibrated bypass flow of 150 ±50 ml/min
(at 50 psi pipeline pressure), to ensure the
delivery of some oxygen even if the flow
control valve is fully closed.
If required for low-flow anesthesia, the
NARKOMED 3 can be optionally modified
to eliminate the minimum oxygen flow
feature.
A
flowmeter indicates that the anesthesia
machine has been modified to eliminate
minimum oxygen flow.
If air is an additional gas, when the gas
selector switch is set to the "ALL GASES"
position, the minimum oxygen flow is
automatically disabled.
RANGE
0 - 500 ml/min
0 - 10 l/min
0 - 500 ml/min
0 - 10 l/min
label
above
the
ACCURACY
±2.5% (FS)
±2.5% (> 1 l/min)
±15% Rate (< 1 l/min)
±2.5% (FS)
±2.5% (> 1 l/min)
±15% Rate (< 1 l/min)
oxygen
13
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