9100c
5-4 M1207026
“high flow” regulated pressure can fall within the
specification.
— If the regulator subsequently fails the “low flow”
specification (Step 3) because the reading is too high,
replace the cylinder supply.
8. Set the system switch to Standby.
9. Close the cylinder valve.
10. Bleed the system of all pressure (Section 9.1)
11. Disconnect the test device and plug the test port (pull on the plug
to make sure it is locked in the fitting).
12. Replace the bellows assembly.
13. After the last regulator has been tested, perform the checkout
procedure (Section 3).
Test B For all gases not used to supply drive gas to the ventilator:
Under low flow conditions, the output pressure of a properly adjusted
and functioning regulator should fall within specifications listed in step
3. Under high flow conditions, the output pressure should not drop
below the specifications in step 6.
1. If the cylinder supply being tested is N
2
O, connect a source of O
2
to pressurize the balance regulator and allow N
2
O to flow.
2. Slowly open the cylinder valve for the regulator being tested.
3. Low Flow Test: Set the fresh gas or O
2
flow to 0.1 L/min.
• Close the cylinder valve and allow the pressure to decay to
2068 kPa (300 psi) as indicated on the cylinder gauge (upper
limit of the red band). The flow may be temporarily increased
to facilitate the decay.
• At the time that the cylinder pressure reaches 2068 kPa (300
psi), close the O
2
or Air flow control valve.
• Within one minute, the test device must stabilize between
310 – 341 kPa (45.0 – 49.5 psi).
— If the test device pressure does not stabilize within one
minute, replace the cylinder supply.
— If the test device pressure stabilizes within one minute,
but the readings are not within specifications, readjust
the regulator (Section 5.1.3).
4. Slowly open the cylinder valve.
5. Set the system switch to On.
6. High Flow Test: Set the flow control valve to the maximum
indicated flow on the flow tube.
• The test device reading must be greater than 221 kPa (32.0
psi).
— If the test device reading under “high flow” conditions is
less than specified, readjust the regulator per the
procedure in Section 5.1.3; however, set the regulated
pressure higher by the difference noted in this step plus 7
kPa (1 psi). This adjusts the “low flow” regulated output to
M1207027 004 MANUAL−DOC, Technical Reference Manual, Technical Reference Manual for 9100c, English−default
Reproduced from the electronic master in MATRIX
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