Neopuff Service Information
• Version History
• Service Testing Procedure
• Maintenance Procedures
Manufactured prior to May 1999
RD900 and RD1000 units
The pre-1999 RD900 is essentially a
repackaging of the RD1000 valve
system (pictured) into the new warmer
Spare parts are unavailable
(manometer excepted) and the entire
fascia should be replaced with a
Version 2 fascia/valve assembly.
Manufactured May ’99 to present
Change to plastic moulded valve
Valve failure means that the entire
assembly (pictured), (excluding
the manometer) should be
Neopuff Service Testing
Purpose of Testing
– Does the manometer reflect the actual circuit pressure?
– Does the valve system generate maximum pressures in the range it
is designed to?
– Minimum of 65cmH2O @ 5 Lpm
– Maximum of 80cmH2O @ 15 Lpm
– Does the valve system allow for controlled and steady adjustment
of the inspiratory pressure (especially after impact or damage)?
Equipment Required for Testing
Supplementary pressure gauge
Gas supply capable of providing
constant flow at 5, 10 and 15 L/min
Test lung or ET tube fitting (as pictured)
Neopuff Testing Setup
There are two options for connecting
a pressure gauge to the Neopuff.
1) Connect pressure gauge
between Neopuff™ outlet
and resuscitation circuit
with test lung fitted (as
2) Connect pressure
gauge to an ET tube
fitting connected to the
end of the T-piece
(Refer previous slide).
Disconnect all devices from the Neopuff.
Check that the manometer reads within ± 2cmH2O of zero. Fine
adjustments to the zero position can be made until the needle lines
up with the zero mark by using a small flat-head screwdriver to
carefully adjust the screw behind the plastic cap on the manometer
Connect the Neopuff to an auxiliary pressure gauge, and a bleed
valve (or T-piece).
Use the inspiratory control valve to adjust the Neopuff to read 10,
20 and 40 cmH2O. At each pressure, open and close the bleed
valve / T-piece 3 times and check that the auxiliary gauge reads
within 2 cmH2O of the Neopuff gauge each time and that the
manometer needle moves smoothly up and down.
If the manometer fails, it should be regarded as inaccurate and
Valve Performance Test
Wind the maximum pressure and inspiratory control valves all the
way clockwise (fully closed).
Adjust the flow supply to 5 L/min and cover the bleed hole. The
manometer should read higher than 65cmH2O.
Adjust the flow supply to 15 L/min and cover the bleed hole. The
manometer should now read less than 80cmH2O.
If the manometer reading is outside the limits above, the valve
system and fascia may need to be replaced. Refer to the technical
manual for the correct replacement part number.
Valve Stability Test
Close the bleed hole and turn the maximum pressure relief down to
40cmH2O, ensuring that the manometer needle moves smoothly
downwards as the valve is adjusted. Move the pressure relief
cover over the valve.
Close the bleed hole again, and turn the inspiratory control valve
down to 20cmH2O, again observing that the manometer needle
moves smoothly downwards.
Jerking or jumping of the manometer needle during valve
adjustment indicates that the valve system may need to be
For manometer or valve replacement procedures, refer to the
NOTE – This test should always be performed after the Neopuff is dropped or
after mechanical shock.
Valve System Replacement
The valve system is not userserviceable, and must be
replaced as an entire set.
Remove all four screws in the
back of the Neopuff. Remove the
plugs and screws in the top and
Disconnect the tube from the
back of the manometer and
unscrew the manometer
Replace the new valve system,
and reassemble the unit.
Perform all service tests before
releasing for use.
1. Remove all four screws in the back of
the Neopuff. Remove the plugs and
screws in the top and bottom caps.
2. Disconnect the tube from the back of
the manometer and unscrew the
manometer retaining nuts.
3. Replace the manometer, and
reassemble the unit.
4. Perform all service tests before
releasing for use.
Resetting the Manometer to Zero
Disconnect everything from
the inlet and outlet of the
Remove the opaque plastic
plug from the face of the
Use a small flat-head
screwdriver to carefully
adjust the screw on the
manometer face so that the
needle rests on zero.
Replace the plug.