Spacelabs BleaseSirius - Figure 64 - Test Points

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To check or adjust the regulators:
1. Remove the small rear inspection panel.
2. Connect a standard low pressure gauge capable of reading
0 to 100 psi ± 5% into the test point by removing the blanking plug.
3. Open the oxygen cylinder or connect the O
2
pipeline.
4. Switch on the machine and set a fl ow of 0.5 lpm on O
2
fl ow meter.
5. Check that the gauge registers the regulator output pressure.
6. If the pressure is outside the required setting, adjust the regulator output
pressure.
7. Remove the front cover, (see section 5.1).
8. Adjust the regulator.
9. Adjust the pressure by undoing the lock nut and turning the hexdrive
clockwise to increase and counter clockwise to decrease the pressure.
Once the pressure is correct, retighten the locknut.
10. Switch off the machine.
11. Disconnect the pressure gauge and refi t the blanking plug.
12. Check the pressure of the secondary nitrous oxide regulator by repeating
steps 3 to 10 for the nitrous oxide regulator.
Nitrous Oxide
Test Point
(Hypoxic Guard)
Oxygen Test
Point
(Hypoxic Guard)
Figure 64 - Test Points
Detailed Repair Procedures