OM131
61
P1939-OM-131 R11
Chapter 4
4.
Insert the flowmeter connector (Divex Part No. DM32580) from the Tool and Test Kit into the
main supply penetrator.
5.
Connect a breathing quality AIR supply to the SLS System Helmet and set a supply pressure
equal to the expected helmet supply pressure from the tables in chapter 3 of the SLS Helmet
Manual OM112.
6.
Blank the top port on the test flowmeter (Divex Part No. DM32580).
7.
Allow the test hose to pressurise until the pressure stabilises.
8.
Check the pressure gauge, which should read 138 mbar (2 psi).
9.
If not adjust regulator by slackening locknut (Fig 4.8, Item 17) and using the Allen key
provided, move the regulator adjustment screw, until 138 mbar (2 psi) is reached and tighten
the locknut.
N
OTE
As this regulator is non-venting the internal pressure should be released before adjustment and be
allowed to build up again after adjustment.
10.
Check the flow through the regulator using the test flowmeter with the test connector plug
inserted in the injection orifice penetrator. With the supply set at 10 to 15 bar, the centre of the
flowmeter ball should lie between the black bands on the scale (1.0 - 2.0 L/min).
11.
If not, check the condition of the inlet filter on the single stage regulator and if it is corroded or
clogged, replace the inlet filter fitting (Fig 4.8, Item 22) and repeat Step 9. to verify the correct
flow. If the problem persists check the condition of the filter on the helmet sideblock elbow.
Replace if necessary and repeat step 9.
4.3.2.6 Check operation of demand regulator
N
OTE
Do not carry out this test whilst the SLS System is charged with heliox gas mixtures as they act as
asphyxiants at normal atmospheric pressures.
1.
Discharge any mixed gas and charge the gas cylinders with breathing quality AIR to a
pressure of at least 200 bar.
2.
Connect the manometer (Divex Part No. DM32570) from the Tool and Test Kit to one of the
hose spigots.
3.
Ensure that the scrubber door is in place and closed tight.
4.
Connect one of the main hoses to the other spigot and inhale on the other end - the demand
regulator should start to flow gas with a differential pressure of -26 to -27 cm WG showing on
the manometer.
5.
If the regulator requires adjustment, remove the cap (Table 4.1, Item 11) and using a
screwdriver move the adjustment screw (Table 4.1, Item 10).
6.
Repeat Step 4. until the correct negative pressure is set (turn the screw clockwise to achieve
a more negative pressure setting).
7.
Pack the end cap and spring housing with Christo-lube fluorinated grease (Divex Part No
SM034). This will prevent seawater freezing within the spring chamber.
Summary of Contents for Divex SLS Mk IV
Page 2: ...Intentionally Blank...
Page 4: ...ii OM131 Approval Sheet P1939 OM 131 R11 Intentionally Blank...
Page 6: ...iv OM131 Preface P1939 OM 131 R11 Intentionally Blank...
Page 8: ...vi OM131 List of Abbreviations P1939 OM 131 R11 Intentionally Blank...
Page 10: ...viii OM131 Warnings P1939 OM 131 R11 Intentionally Blank...
Page 12: ...x OM131 Table of Contents P1939 OM 131 R11 Intentionally Blank...
Page 15: ...OM131 3 P1939 OM 131 R11 Chapter 1 Fig 1 1 SLS System Mk IV...
Page 16: ...4 OM131 Chapter 1 P1939 OM 131 R11 Fig 1 2 SLS system layout...
Page 32: ...20 OM131 Chapter 2 P1939 OM 131 R11 Fig 2 4 Two stage regulator Fig 2 5 Spool valve...
Page 42: ...30 OM131 Chapter 2 P1939 OM 131 R11 Intentionally Blank...
Page 53: ...OM131 41 P1939 OM 131 R11 Chapter 3 Fig 3 3 Hose Lanyards...
Page 54: ...42 OM131 Chapter 3 P1939 OM 131 R11 Fig 3 4 SLS System Mk IV Rear View...
Page 55: ...OM131 43 P1939 OM 131 R11 Chapter 3 Fig 3 5 SLS System Mk IV Front View...
Page 64: ...52 OM131 Chapter 3 P1939 OM 131 R11 Intentionally Blank...
Page 82: ...70 OM131 Chapter 4 P1939 OM 131 R11 Fig 4 7 Annual Maintenance Two Stage Regulator...
Page 86: ...74 OM131 Chapter 4 P1939 OM 131 R11 Fig 4 8 Annual Maintenance Single Stage Regulator...
Page 109: ...OM131 97 P1939 OM 131 R11 Chapter 5 Fig 5 2 Backpack Assembly Drawing P1939229S1...
Page 111: ...OM131 99 P1939 OM 131 R11 Chapter 5 Fig 5 4 Scrubber Housing Assembly Drawing P1939131S1...
Page 118: ...106 OM131 Chapter 5 P1939 OM 131 R11 Fig 5 9 SLS System Mk IV Gas Schematic Drawing P193940S1...
Page 123: ...OM131 111 P1939 OM 131 R11 Chapter 5 Fig 5 14 SLS System Mk IV Bottle Assembly...