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Hollis Prism 2 User's & Service Manual

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USER SERVICE GUIDE
This PRISM 2 Service Procedure conveys a list of components and service procedures that reflect the
PRISM 2 as it was configured at the time of this writing (9/12/12).
Doc. 12-4091 - r01 (9/12/12)
SUPPORT: TOLL-FREE 888-383-DIVE│ FAX 510-729-5115 │ E-MAIL info@hollisgear.com

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  • Page 1 USER SERVICE GUIDE This PRISM 2 Service Procedure conveys a list of components and service procedures that reflect the PRISM 2 as it was configured at the time of this writing (9/12/12). Doc. 12-4091 - r01 (9/12/12) SUPPORT: TOLL-FREE 888-383-DIVE│ FAX 510-729-5115 │ E-MAIL info@hollisgear.com...

  • Page 2: Table Of Contents

    OXYGEN USE ....................................8 SAFETY ......................................9 SERVICE SCHEDULE & ASSEMBLIES 1. SERVICE & PARTS REPLACEMENT SCHEDULE SCHEDULE ....................................13 2. PRISM 2 ASSEMBLIES DIAGRAM DIAGRAM ....................................15 AMBIENT PRESSURE 1. BREATHING LOOP TOOLS ......................................17 TROUBLE SHOOTING ................................18 INITIAL INSPECTION .................................
  • Page 3 SERVICE GUIDE 2. DSV (DIVE SURFACE VALVE) TOOLS ......................................35 TROUBLE SHOOTING ................................36 MUSHROOM VALVE CHECKS ..............................36 DISASSEMBLY PROCEDURE ..............................37 REASSEMBLY PROCEDURE ..............................38 EXPLODED VIEW DIAGRAMS & PARTS LISTS ........................41 3. SCRUBBER BUCKET & SCRUBBER BASKET TOOLS ......................................
  • Page 4 SERVICE GUIDE 2. OXYGEN SENSORS TOOLS ......................................60 TROUBLE SHOOTING ................................61 DISASSEMBLY PROCEDURE ..............................62 MILLIVOLT/LINEARITY TEST & CLEANING ..........................63 REASSEMBLY PROCEDURE ..............................64 RECOMMENDED SENSORS ..............................65 CALIBRATION .................................... 65 EXPLODED VIEW DIAGRAM & PARTS LIST ........................... 67 SUPPORT: TOLL-FREE 888-383-DIVE │...
  • Page 5 This guide does not replace proper instruction from a PRISM 2 Instructor. Instructions contained within this guide are only to be performed by persons trained to dive and assemble the PRISM 2. Before service, ensure with Hol- lis that this is the most current revision of this guide. If you do not completely understand the instructions given in this manual, lack the correct tools, or lack the appropriate level of mechanical knowledge - have an authorized Hollis PRISM 2 Service Facility or Hollis Customer Service complete repairs.

  • Page 6: Definitions

    SERVICE GUIDE DEFINITIONS Absorbent: chemical media used to remove CO from exhaled gas ADV: automatic diluent valve Bailout: redundant gas supply system BOV: bail out valve Breakthrough: where absorbent scrubber fails, no longer removing CO at an adequate rate Breathing Loop: parts of the rebreather that breathing gas circulates within Diluent: a gas used for breathing volume and to reduce the fraction of oxygen in the Breathing Loop DSV: dive surface valve : fraction of oxygen...

  • Page 7: Modification Warning

    - This Service Guide is not an instructional manual for operation of the PRISM 2. This guide only provides instructions on repairing the unit. No person should breathe from, or attempt to use in any way, a Hollis Prism 2 rebreather, or any component part thereof, without first completing an appropriate Hollis Certified user-training course.

  • Page 8: General Procedures

    Air supply system, that is not rated for Oxygen Service, it cannot sub- sequently be used with Nitrox breathing gases containing more than 40% oxygen by volume unless it is again prepared for Oxygen Service by a Qualified Hollis Dealer Facility who is certified in and follows Oxygen Service Procedures.

  • Page 9: Safety

    PRIOR TO DISASSEMBLY • Ensure that you have the latest revision of this Service Guide and all Hollis Service Updates. Contact Hollis Customer Service to confirm. • Be certain to perform the Initial Inspection and Troubleshooting Procedures of each section of this Service Pro- cedure Guide prior to beginning any Section's Disassembly.
  • Page 10 • Again, prior to beginning Disassembly perform the Inspection and Troubleshooting Procedures at the beginning of each of this Guide's sections. • Disassemble the different PRISM 2 components in accordance with the disassembly section provided in this Service Procedure Guide.
  • Page 11 • To ensure that the Parts do not become contaminated, assemble the components immediately after completion of Cleaning and Final Inspection. • Ensure that all Replacement Parts used are those specified in the Service Procedure(s) for use with the PRISM 2. Lubrication •...
  • Page 12 • Assemble the PRISM 2 Components according to the Reassembly Procedures described in each section of this Service Procedure Guide. Refer to the PRISM 2 User Manual for instructions on how to assemble all Compo- nents together into a complete and working PRISM 2 unit.

  • Page 13: Schedule

    SERVICE GUIDE 1. PRISM 2 SERVICE & PARTS REPLACEMENT SCHEDULE S = SERVICE, R = REPLACE PART AS NEEDED 12 MONTHS 36 MONTHS 5 YEARS Head to Inhalation Counterlung hose Head to counterlung hose connector O-rings Inhalation Counterlung Inhalation mushroom valve...
  • Page 14 SERVICE GUIDE PART AS NEEDED 12 MONTHS 36 MONTHS 5 YEARS Diluent LP Hoses & QD Diluent HP Hose O2 Pressure gauge Diluent Pressure gauge Oxygen Solenoid SUPPORT: TOLL-FREE 888-383-DIVE │ FAX 510-729-5115 │ E-MAIL info@hollisgear.com PG-14 © 2002 DESIGN (2012) Doc.

  • Page 15: Prism 2 Assemblies Diagram

    SERVICE GUIDE 2. PRISM 2 ASSEMBLIES DIAGRAM SUPPORT: TOLL-FREE 888-383-DIVE │ FAX 510-729-5115 │ E-MAIL info@hollisgear.com PG-15 © 2002 DESIGN (2012) Doc. 12-4091 - r01 (9/12/12)
  • Page 16 SERVICE GUIDE PRISM 2 ASSEMBLIES DIAGRAM PARTS LIST DIA. P/N DESCRIPTION NOTES 28674 HEAD ASSEMBLY Doc. 12-4093, Technician only 27755 SCRUBBER BASKET & CAP Doc. 12-4094 27985 BUCKET ASSEMBLY Doc. 12-4094 28224 NUT BAR 28680 MOUNTING TUBE 28217 MOUNTING POST 28681 COVER ASSY.

  • Page 17: Breathing Loop

    SERVICE GUIDE 1. BREATHING LOOP Tools Required Standard Tools Specialty Tools magnifying lens P/N 220.9102 Tribolube 71 inspection light P/N 220.9101 Christo-Lube MCG 111 pure breathing gas supply P/N TBD Oetiker clamp pliers P/N TBD STERAMINE™ sanitizer P/N TBD Thin Nut Wrench P/N TBD SI-TECH®...

  • Page 18: Troubleshooting

    SERVICE GUIDE TROUBLESHOOTING The Breathing Loop (DSV/BOV, Breathing Hoses, Coun- ter Lungs; Scrubber Assembly) of the PRISM 2 is sensi- tive to wear and tear (Fig. 1). It should be thoroughly inspected during any service. The key failure to be looking for is a leak or a worn component that is about to fail.

  • Page 19: Positive Pressure Test

    SERVICE GUIDE 4. Inspect the DRAIN VALVES (43, 54) at the bottom of each COUNTERLUNG (30, 44) for proper opera- tion. Loosen the locking collar clockwise, and actuate the DRAIN VALVES (43, 54) by depressing the nipple inward toward the body of the valve (Fig. 2). It should pop back out when you let go of the valve.

  • Page 20: Disassembly Procedure

    SERVICE GUIDE 4. Using a regulator first stage and LP QD hose at- tached to the ADV/MANUAL DILUENT VALVE (52), fill the COUNTERLUNGS (30, 44) with pure breathing gas, until gas vents from the OVER-PRESSURE VALVE (OPV) (40). The COUNTERLUNGS (30, 44) should be full and firm to the touch.
  • Page 21 RUBBER GASKET (39) for damage. The Manual Oxygen Addition Valve is not serviceable. If damaged or faulty, replace with new. Otherwise, follow the PRISM 2 Service and Parts Replacement Schedule (Doc. 12-4092). Fig. 11 SUPPORT: TOLL-FREE 888-383-DIVE │ FAX 510-729-5115 │ E-MAIL info@hollisgear.com PG-21 ©...
  • Page 22 NOTE: A thorough cleaning should rectify any Fig. 12 binding in the rotation of the OPV (40). At the time of this writing Hollis is using a SI-TECH® valve identical to those commonly used on Dry- suits. If the valve needs further service besides cleaning, refer to service procedures and/or recommendations from SI-TECH®.

  • Page 23: Reassembly Procedure

    Valves and Service the DSV/BOV (1) as described in the DSV/BOV section of this service guide. 13. Clean and disinfect all components of the Breathing Loop with chemicals currently approved by Hollis before reassembly. REASSEMBLY 1. Place a O-RING (41) on the OVER-PRESSURE VALVE (OPV) (40), as shown (Fig.
  • Page 24 COUNTERLUNGS (30, 44) to the Counter- lung Mounting Yoke. 5. Lightly lubricate all BREATHING HOSE FITTING O-RINGS (15, 20, 24, 29, 37, 51) with Hollis approved Fig. 19 lubricant. Then position them inside their respective O- ring grooves.
  • Page 25 SERVICE GUIDE 6. Reinstall the INHALATION DIAPHRAGM CAGE (22) into the end of the LEFT SIDE BREATHING HOSE (21). Using Clamp Pliers attach HOSE CLAMPS (26) to secure the HOSE (21). Ensure that the CLAMPS (26) have their PROTECTIVE SLEEVE (27) installed over them.
  • Page 26 SERVICE GUIDE 9. Attach the FORWARD EXHALATION-SIDE BREATHING HOSE (13) to the Exhalation (Diver's Right-Side) COUNTERLUNG (44) (FIG. 24). Start the threads clockwise. Then adjust and seat the elbow into the proper orientation, about 225°. Tighten the fitting until hand tight. DO NOT over-tighten. CAUTION: The captive O-ring, not torque, seals the fitting.

  • Page 27: Positive Pressure Test Repeated

    SERVICE GUIDE POSITIVE PRESSURE TEST REPEATED (to check for component integrity after reassembly) 1. Ensure all Breathing Loop components are con- nected and properly tightened as described in the above sections. 2. Rotate the OVER-PRESSURE VALVE (OPV) (40) body clockwise until it is fully closed. 3.

  • Page 28: Disassemble & Disinfect Parts

    SERVICE GUIDE NEGATIVE PRESSURE TEST NOTE: This test differs from a Positive Pres- sure Test but is no less critical. Parts that pass a Positive Pressure Test may fail in a negative (vacuum) state. Much like a Mushroom Valve opens and closes, a damaged O-ring may leak under internal pressure and close with the pres- ence of external pressure.
  • Page 29 SERVICE GUIDE 6. The final check is to open the DSV/BOV (1). A brief and sudden rush of air should be observed as the internal Breathing Loop pressure equalizes with ambient pressure. Non-occurrence is a sure sign that there is a leak.

  • Page 30: Exploded View Diagrams & Parts Lists

    SERVICE GUIDE DIVE SURFACE VALVE (DSV) DIAGRAM DIA. CAT. DESCRIPTION NOTES 27762 BODY, DSV 27760 BARREL 22-126 O-RING QTY: 2 29136 O-RING 27350 SCREW 27761 KNOB 22-010 O-RING 27031 MOUTHPIECE 21978 TY-STRAP 22-028 O-RING 27763 HOLDER, OUTLET 27765 MUSHROOM VALVE SUPPORT: TOLL-FREE 888-383-DIVE │...
  • Page 31 SERVICE GUIDE EXHALATION HOSE ASSEMBLY DIAGRAM DIA. CAT. DESCRIPTION NOTES 28330.14 HOSE, BREATHING 27768 ADAPTER, HOSE OUTLET 22-130 O-RING 27766 NUT, CHROME 28333 HOSE CLAMP QTY: 4 28364 COVER, HOSE CLAMP QTY: 2 27805 ELBOW ASSY., EXHALE 22-125 O-RING SUPPORT: TOLL-FREE 888-383-DIVE │ FAX 510-729-5115 │ E-MAIL info@hollisgear.com PG-31 ©...
  • Page 32 SERVICE GUIDE INHALATION HOSE ASSEMBLY DIAGRAM DIA. CAT. DESCRIPTION NOTES 28330.14 HOSE, BREATHING 27764 HOLDER, INLET 27765 MUSHROOM VALVE 22-128 O-RING 27765 NUT, CHROME 28333 CLAMP QTY: 4 28364 COVER, HOSE CLAMP QTY: 2 27806 ELBOW ASSY., INHALE 22-125 O-RING SUPPORT: TOLL-FREE 888-383-DIVE │...
  • Page 33 29235 O-RING 27960 O2 ADDITION VALVE 219045 GASKET 24664 OPV, LP 22-125 O-RING 24558 HOLLIS LOGO, BUTTON 23237 ORAL VALVE, METAL SUPPORT: TOLL-FREE 888-383-DIVE │ FAX 510-729-5115 │ E-MAIL info@hollisgear.com PG-33 © 2002 DESIGN (2012) Doc. 12-4091 - r01 (9/12/12)
  • Page 34 SERVICE GUIDE INHALATION COUNTERLUNG ASSEMBLY DIAGRAM DIA. CAT. DESCRIPTION NOTES 28134 COUNTERLUNG, INHALE 28330.14 HOSE, BREATHING 28333 CLAMP QTY: 4 28364 COVER, HOSE CLAMP QTY: 2 28992 RETAINING RING 27813 NUT, CHROME 27770 ADAPTER, HOSE 29235 O-RING 27961 DILUENT ADD VALVE 28080 GASKET 23237...

  • Page 35: Tools

    SERVICE GUIDE 2. DIVE SURFACE VALVE (DSV) Tools Required Standard Tools Specialty Tools magnifying lens P/N 220.9102 Tribolube 71 inspection light P/N 220.9101 Christo-Lube MCG 111 dowel or rounded tool handle P/N TBD Oetiker clamp pliers P/N TBD STERAMINE™ cleaner P/N TBD Retaining Nut Tool P/N TBD...

  • Page 36: Troubleshooting

    SERVICE GUIDE TROUBLESHOOTING SYMPTOMS POSSIBLE CAUSE TREATMENT failed Mushroom Valve checks obstructed or damaged clean /replace MUSHROOM MUSHROOM VALVES (12, VALVES (11), clean VALVE HOLDERS (9,15) leaking gas out of Breathing worn O-RINGS (3, 4, 7, 18, 20) replace O-RINGS (3, 4, 7, 18, Loop rough barrel operation dirty barrel mating surfaces...

  • Page 37: Disassembly Procedure

    SERVICE GUIDE DISASSEMBLY 1. Slide the SILICONE HOSE CLAMP COVER (15, 23) off of the HOSE CLAMPS (14, 24) on the INHALATION HOSE (13) and EXHALATION HOSE (25), where it mounts to the DSV. 2. Using hose clamp pliers, remove the HOSE CLAMPS (14, 24) from the INHALATION HOSE (13) and EXHA- LATION HOSE (25) (FIG.

  • Page 38: Reassembly Procedure

    Plastic components should be cleaned in Simple Green®. REASSEMBLY 1. Lubricate O-RINGS (3,4) with Hollis approved lubri- cant and install them into the Stainless Steel Barrel (Fig. Fig. 7 2. Lightly lubricate the internal walls of the BODY (1) with Hollis approved lubricant.
  • Page 39 Valve Holders and properly seated (Fig. 11). 8. Lightly lubricate the HOLDER O-RINGS (10, 18, 20) with Hollis approved lubricant, and install the O-RINGS (10, 18, 20) in the grooves of the INLET HOLDER (17), OUTLET HOLDER (11), and OUTLET ADAPTER (21).
  • Page 40 SERVICE GUIDE 10. Press the INLET HOLDER (17) and OUTLET ADAPTER (21) onto their respective sides of the BODY (1) (Fig. 13). NOTE: The INLET HOLDER (17) and OUTLET ADAPTER (21) are not interchangeable. They will only fit together on their correct sides . 11.

  • Page 41: Exploded View Diagrams & Parts Lists

    SERVICE GUIDE DIVE SURFACE VALVE (DSV) DIAGRAM DIA. CAT. DESCRIPTION NOTES 27762 BODY 27760 BARREL 22-126 O-RING QTY: 2 29136 O-RING 27350 SCREW 27761 KNOB 22-010 O-RING 27031 MOUTHPIECE 21978 TY-STRAP 21978 O-RING 27763 HOLDER, OUTLET 27765 MUSHROOM VALVE SUPPORT: TOLL-FREE 888-383-DIVE │ FAX 510-729-5115 │ E-MAIL info@hollisgear.com PG-41 ©...
  • Page 42 SERVICE GUIDE INHALATION HOSE DIAGRAM DIA. CAT. DESCRIPTION NOTES 28330.14 HOSE, BREATHING 28333 CLAMP QTY: 2 28364 COVER, HOSE CLAMP 27766 27764 HOLDER, INLET 22-128 O-RING 27765 MUSHROOM VALVE SUPPORT: TOLL-FREE 888-383-DIVE │ FAX 510-729-5115 │ E-MAIL info@hollisgear.com PG-42 © 2002 DESIGN (2012) Doc.
  • Page 43 SERVICE GUIDE EXHALATION HOSE DIAGRAM DIA. CAT. DESCRIPTION NOTES 22-130 O-RING 27768 ADAPTER, HOSE OUTLET 27760 28364 COVER, HOSE CLAMP 28333 CLAMP QTY: 2 28330.14 HOSE, BREATHING SUPPORT: TOLL-FREE 888-383-DIVE │ FAX 510-729-5115 │ E-MAIL info@hollisgear.com PG-43 © 2002 DESIGN (2012) Doc.

  • Page 44: Tools

    SERVICE GUIDE 3. SCRUBBER BUCKET, SCRUBBER BASKET, & SCRUBBER O-RINGS Specifications Torques 9 in/lbs (1.02 N-m) P/N 28084 Screw (Latch Keeper) 9 in/lbs (1.02 N-m) P/N 24787 Screw (Head Plate) Tools Required Standard Tools Specialty Tools magnifying lens P/N 220.9102 Tribolube 71 inspection light P/N 220.9101...

  • Page 45: Trouble Shooting

    SERVICE GUIDE TROUBLESHOOTING SYMPTOM POSSIBLE CAUSE TREATMENT SCRUBBER CANISTER (15) 1. worn/broken Spring Assembly 1. replace Spring Assembly not sealing properly to the RED in the bottom of the Scrubber 2. clean or replace RED CO₂ SEAL (28) Bucket SEAL (28). 2.
  • Page 46 SERVICE GUIDE NOTE: Remove the INNER O-RING (25) first; so it slides easily over the OUTER O-RING (25) with- out seating in the groove. 4. Remove the RED CO₂ SEAL (28) (Fig. 3). If less than twelve months old, inspect the RED CO₂ SEAL (28) for signs of decay.
  • Page 47 SERVICE GUIDE NOTE: If the Spring Assembly has seized, broken, or fails to hold the SCRUBBER BASKET (15) se- curely against the RED CO₂ SEAL (28), the Spring Assembly must be replaced. Otherwise, skip step 6. 6. If removing the Spring Assembly, remove the LOCK- NUT (3) counterclockwise with a 3/8"...
  • Page 48 SERVICE GUIDE 9. Turning counterclockwise, unscrew the CAP (18) from the OUTER SCRUBBER BASKET (15) (Fig. 9). NOTE: If absorbent is caked on the threads of the CAP (18) and OUTER SCRUBBER BASKET (15), 100% white vinegar may be used to clean. Then rinse the part with fresh water to remove the vinegar.

  • Page 49: Reassembly Procedure

    SERVICE GUIDE REASSEMBLY NOTE: Light application of DOW CORNING® 7 sili- cone to the threads of the SCRUBBER BASKET (15), INNER BASKET (17), and SCRUBBER BASKET CAP (18) will aid in the prevention of absorbent caking . 1. Install the INNER BASKET O-RING (17) in the groove on the INNER BASKET (16).
  • Page 50 SERVICE GUIDE 8. Place a new RED CO₂ SEAL (28) into the groove of the HEAD PLATE (27) (Fig. 18). NOTE: If the LATCH KEEPER (23) was not removed, skip steps 9 and 10. 9. Slide the LATCH KEEPER (23) into place on the SCRUBBER HEAD (22).
  • Page 51 SERVICE GUIDE 13. Place the SCRUBBER BASKET (15) into the SCRUBBER BUCKET (1). Ensure to align the centering hole with the Spring Assembly (Fig. 21). 14. Being careful not to pinch the O-RINGS (25), seat the SCRUBBER BUCKET (1) over the O-RINGS (25) and SCRUBBER HEAD (22).

  • Page 52: Exploded View Diagrams & Parts Lists

    SERVICE GUIDE SCRUBBER BUCKET ASSEMBLY DIAGRAM NOTES; APPLY LOCTITE 220 THREAD LOCKER TO THREADS BEFORE INSTALLING DIA. CAT. DESCRIPTION NOTES 27986 BUCKET & STUD ASSY. 224817 WASHER 224819 LOCKNUT 28354 PAD, SPRING 28355 SPRING, BUCKET 29227 SPONGE PAD 27983 BAND ASSY. W/LATCHES &...
  • Page 53 SERVICE GUIDE SCRUBBER BASKET ASSEMBLY DIAGRAM DIA. CAT. DESCRIPTION NOTES 27749 SCRUBBER BASKET, OUTER 27751 SCRUBBER BASKET, INNER 22-133 O-RING 27756 SCRUBBER CAP 27869 FOAM PAD, UPPER 27908 FOAM PAD, LOWER 28977 DECAL SUPPORT: TOLL-FREE 888-383-DIVE │ FAX 510-729-5115 │ E-MAIL info@hollisgear.com PG-53 ©...
  • Page 54 SERVICE GUIDE SCRUBBER O-RINGS DIAGRAM TORQUE TO 9 1 in-lbs. 29 30 24 2 DIA. CAT. DESCRIPTION NOTES 27807 HEAD ASSEMBLY 27816 KEEPER, LATCH 28084 SCREW, BUTTON HEAD 29137 O-RING QTY: 2 22-153 O-RING 27809 HEAD PLATE 27810 SEAL, RED CO 27569 WASHER QTY: 4...

  • Page 55: Tools

    SERVICE GUIDE 1. BATTERIES & PRESSURE RELIEF VALVE Specifications Torques 35 - 40 in/lbs (4 - 4.5 N-m) P/N 29048 OP Valve 9 in/lbs (1.02 N-m) P/N 216748 Screw (Latch) Tools Required Standard Tools Specialty Tools magnifying lens P/N TBD Dow Corning inspection light Molykote 7 silicone...

  • Page 56: Trouble Shooting

    SERVICE GUIDE TROUBLESHOOTING SYMPTOMS POSSIBLE CAUSE TREATMENT flooded battery compartment 1. failed O-RING (10, 11) 1. replace O-RINGS (10, 11), clean compartment, and replace wiring no power 1. exhausted battery 1. replace battery 2. corroded or damaged 2. clean or replace BATTERY BATTERY CABLE ASSEMBLY (8) CABLE ASSEMBLY (8)

  • Page 57: Design (2012) Pg

    DO NOT use abrasives, petroleum distillates, silicone based cleaners, erasers, combust able chemicals, or any other harsh cleaners. Hollis recommends the use of DeoxIT Gold® GN5 for cleaning the electrical contacts of the BATTERY CABLE ASSEMBLY (8) Fig.

  • Page 58: Reassembly Procedure

    SERVICE GUIDE REASSEMBLY NOTE: If the INTERNAL OVER-PRESSURE PLUG (2) was still intact upon BATTERY HOUSING (1) disassembly, skip step 1. 1. Ensure the plastic sealing surface is not damaged. Then press the new O-RING (3) and OVER-PRESSURE PLUG (2) into the port until fully seated with a dull instru- ment (dental tool) (Fig.

  • Page 59: Exploded View Diagram & Parts List

    SERVICE GUIDE BATTERY HOUSING ASSEMBLY DIAGRAM TORQUE TO 9 1 in-lbs. TORQUE TO 35/40 in-lbs. DIA. CAT. DESCRIPTION NOTES 28675 HOUSING, ELECTRONICS 216823 PRESSURE PLUG 22-003 O-RING 27651 SCREW QTY: 4 27979 LATCH QTY: 2 22-113 O-RING QTY: 2 29223 BULKHEAD CONNECTOR, BAT.

  • Page 60: Tools

    SERVICE GUIDE 2. OXYGEN SENSORS Tools Required Standard Tools Specialty Tools magnifying lens P/N 220.9102 Tribolube 71 inspection light P/N 220.9101 Christo-Lube MCG 111 O-ring pick P/N TBD O-ring removal tool volt meter (plastic) snap ring pliers P/N TBD Deoxit Gold® GN5 cleaner dental tool SUPPORT: TOLL-FREE 888-383-DIVE │...

  • Page 61: Troubleshooting

    1. Sensors are expendable, the diver is not. The sensors from Hollis have a "Do not use after" date printed on the body. They should last around 12 months of use or 16 months from manufacture, whichever comes first. But regardless of the expected sensor life, they must be taken out of service whenever they fail to operate .

  • Page 62: Disassembly Procedure

    SERVICE GUIDE SYMPTOM POSSIBLE CAUSE TREATMENT 1. SENSOR (7) completely 1. replace SENSOR (7) no mV reading 2. replace SENSOR (7) exhausted 2. defective SENSOR (7) 3. clean/repair WIRING (5) 3. corroded or shorted WIRING 1. allow SENSOR (7) to dry erratic/irregular reading 1.

  • Page 63: Millivolt/Linearity Test & Cleaning

    Form. You should retain the original copy for your records. WARNING: The SENSORS (7) must be installed in the PRISM 2, tested, and pass the Final Inspection Procedure before returning the PRISM 2 unit to your customer for use. The Final Inspection Proce- dure may be found in the Receiving and Final Inspection Section of the PRISM 2 Service Guide.

  • Page 64: Reassembly Procedure

    SERVICE GUIDE WARNING: The membrane CAN NOT be cleaned if contaminated by any other contaminates besides salt crystals. Greases such as finger prints, Tribolube®, and other such contaminants can clog the pores of the membrane permanently, destroying the sensor. DO NOT use a sensor which has such contamination.

  • Page 65: Recommended Sensors

    SERVICE GUIDE RECOMMENDED SENSORS Hollis PRISM 2's require Hollis brand oxygen sensors (Fig. 3). Connector style: Molex MV Range: 8.5 - 14 mV (in air), 40 - 67 mV (in oxygen) SENSOR CALIBRATION (Shearwater Primary HUD Electronics) This will calibrate the Primary HUD Display to oxygen.
  • Page 66 SERVICE GUIDE SENSOR CALIBRATION (Shearwater Secondary Electronics) This will calibrate the sensor displays to oxygen. Close the DSV/BOV. Using the Manual Oxygen Addition Valve, fill the Breathing Loop with pure oxygen. Open the DSV/ BOV, and collapse the Counterlungs with your hands. When the lungs are collapsed close the DSV/BOV quick- ly.

  • Page 67: Exploded View Diagram & Parts List

    SERVICE GUIDE SCRUBBER HEAD (SENSOR COMPONENTS) DIAGRAM DIA. CAT. DESCRIPTION NOTES 27807 HEAD ASSEMBLY 27872 RETAINING RING 22-113 O-RING QTY: 2 29224 BULKHEAD CON., OXYGEN 29222 CABLE ASSY., OXYGEN 28683 HOLDER, SENSOR QTY: 3 27946 OXYGEN SENSOR QTY: 3, not shown SUPPORT: TOLL-FREE 888-383-DIVE │...

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