Adjusting Cylinder Regulators - GE 9100c Technical Reference Manual

5.1.3 Adjusting
Cylinder Regulators
M1207026
M1207027
Reproduced from the electronic master in MATRIX
the high side of the specification so that the "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.
7. Set the system switch to Standby.
8. Close the cylinder valve.
9. Bleed the system of all pressure (Section 9.1)
10. Disconnect the test device and plug the test port (pull on the plug
to make sure it is locked in the fitting).
11. Replace the large rear upper panel.
12. Perform the checkout procedure (Section 3).
Important: Cylinder supplies in a 9100c machine must have all high-
pressure regulators set to the same pressure range. If a regulator is
replaced, the replacement regulator must be set (as required) to the
same specification as the one removed.
Important: Install a full cylinder in the cylinder supply to be adjusted.
It is essential that the cylinder be within 10% of its full pressure.
If the cylinder supply being adjusted is N
and set the O flow control to the minimum stop (pilot pressure for
2
low-pressure regulator).
To adjust the cylinder regulators, follow the procedure in Section
5.1.1 to gain access to the regulators.
Do not attempt to adjust without flow.
1. Slowly open the cylinder valve.
2. Set and maintain the fresh gas or O
to 0.1 L/min.
3. 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.
4. When the cylinder gauge reaches the upper limit of the red band,
adjust the regulator output pressure to 327 to 341 kPa (47.5 to
49.5 psi).
It may be necessary to open the cylinder valve and repeat steps 4
Note
and 5 a number of times to achieve the above setting.
5. Test the regulator setting per the appropriate test in Section
5.1.2:
• Test A — For cylinder regulators that supply drive gas to the
ventilator.
• Test B — For all gases not used to supply drive gas to the
ventilator.
004 MANUAL−DOC, Technical Reference Manual, Technical Reference Manual for 9100c, English
5 Calibration
O, connect a source of O
2
flow of the gas being tested
2
2
5-5