Test Procedures
Note: Failure of the following test will require unit to be returned for service.
These tests must be conducted periodically to ensure proper operation.
(Refer to gure 1)
Test: Connect unit to a 50psi gas source. Check to make sure control
valves are turned off. Gently turn both valves clockwise until unit
resistance is felt.
1. Minimum oxygen: Turn on unit by pushing and turning on/off knob. A 3
liter ow of oxygen should be produced through O2 tube.
2. Oxygen ush: Depress O2 ush button to determine a rapid ow of
oxygen into breathing circuit. Flow should stop when button is released.
3. Maximum nitrous: Turn N2O needle valve wide open. N2O ow should
not exceed 7 LPM.
4. Fail safe test: Establish a 7 LPM N2O ow and 3 LPM O2 ow. Disconnect
O2 supply source or turn off O2 shut-off valve. Both O2 and N2O ows
should stop owing.
5. Air intake valve: Attach breathing bag and corrugated breathing tube
to proper ports of tee. Unit should be turned off and bag attened. Inhale
through breathing tube. Room air must enter through air intake located on
bottom of breathing circuit tee.
6. Non-Rebreathing valve: Connect corrugated tube to front of tee and
attempt to exhale through tube. Valve should be closed preventing
exhaled air from going into tube.
Maintenance
1. Ascertain a proper gas supply
pressure of 50psi.
2. Inspect machine hoses and
connections for damage, wear and
leaks daily.
3. Perform functional test periodically.
4. Keep unit clean. Unit and
accessories may be cleaned with
activated dialdehyde (Cidex).
Follow manufacturers directions
for use.
Service: All Service and repair must
be completed at Belmed, Inc. Have
your dealer return the unit to our
facility for service.
Operation
1. Turn unit on (100% O2) and set
the oxygen ow rate to equal total
gas ow (minute volume) to be
administered to patient. Maintain
breathing bag about ⅔full.
2. Apply nasal hood to patient.
3. Gradually introduce nitrous
oxide ow rate while proportionally
decreasing oxygen ow rate
(maintaining total gas ow) until
determined patient ratio is reached.
4. If oxygen is required, press oxygen
ush button.
5. To remove patient from conscious
sedation, return to 100% oxygen ow
rate established at beginning of
procedure. 4
