HEADQUARTERS, DEPARTMENT OF THE ARMY

1 army TM 3-4240-349-12&PMARINE CORPS TM 10224A-14&P/1 AIR FORCE 14P4-15-11 TECHNICAL MANUALOPERATOR AND UNIT MAINTENANCE MANUALFORPROTECTION ASSESSMENTTEST SYSTEM, M41(NSN: 4240-01-365-8241) headquarters , DEPARTMENT OF THE ARMY30 NOVEMBER 1999 PCN 182 102240 00 WARNING - This document contains export-controlled technical data whose export is restricted by the ArmyExport Control Act (Title 22, , Sec 2751 et seq.) or Executive Order 12470. Violation of these exportlaws is subject to severe criminal STATEMENT D: Distribution authorized to the DOD and DOD contractors only to protecttechnical or operational information. This publication is required for administrative and operational purposes, asdetermined on 10 March 1998. army requests for this document must be referred to Technical Director, Soldierand Biological Chemical Command, ATTN: AMSSB-RBD-B (D. Storms, E3549), 5183 Blackhawk Road,Aberdeen Proving Ground, MD 21010-5424.

2 Marine Corps: Requests for this document must be referred to:Commandant of the Marine Corps (ARD), Washington, DC NOTICE: Destroy by any method that will prevent disclosure of contents or reconstruction ofthe 3-4240-349-12&PWARNING SUMMARYThis warning summary includes general safety precautions and instructions thatmust be understood and applied during the operation and maintenance of this sys-tem/equipment to ensure personnel against injury, death, or long-term health haz-ards. A summary of safety and hazardous material warnings that should be heededin conduct of operation and maintenance is provided ALCOHOLI sopropyl alcohol is hazardous material. DO NOT allow alcohol to get into your contact with the skin. Do not swallow or ingest in any way. Alcohol is extremelyflammable. DO NOT expose to open flame or sources of ignition. Consuming the alcoholwill result in severe illness or death.

3 See WP 0033 00 and WP 0034 00 in this manual alcohol used with this system is pure or greater purity reagent grade isopropylalcohol. It must be stored, cared for and disposed of properly. See WP 0033 00 andWP 0034 00 in this manual for instructions. The use of other grades/types of alcohol willdamage the batteries used with this system are lithium-sulfur dioxide batteries. They must bestored, cared for and disposed of properly. See WP 0032 00 and WP 0034 00 in this manualfor in the commercial PORTA COUNT Model 8020 and M41 PATS are not inter-changeable. Using the M41 PATS batteries in the Model 8020 may cause fire or the M41 PATS in a clean area. Do not use in areas with corrosive or acidic 3-4240-349-12&PINSERT LATEST UPDATED PAGES/WORK PACKAGES, DESTROY SUPERSEDED DATALIST OF EFFECTIVE PAGES/WORK PACKAGESNOTE: The portion of text affected by the updates is indicated by a vertical line in the outer margins of the page.

4 Updates to illustrations are indicated by miniature pointing hands. Updates to wiring diagrams are indicated by shaded of issue for the original manuals is:Original .. 0 .. 30 Nov 99 TOTAL NUMBER OF PAGES FOR FRONT AND REAR MATTER IS 14 AND TOTALNUMBER OF WORK PACKAGE IS 35, CONSISTING OF THE FOLLOWING:Page/WP*ChangePage/WP*ChangeNo . 0WP 0018 00 0 Warnings 0WP 0019 00 0i-ii 0WP 0020 00 0 Chp 1 title page 0WP 0021 00 0WP 0001 00 0WP 0022 00 0WP 0002 00 0 Chp 5 title page 0WP 0003 00 0WP 0023 00 0 Chp 2 title page 0WP 0024 00 0WP 0004 00 0WP 0025 00 0WP 0005 00 0WP 0026 00 0WP 0006 00 0WP 0027 00 0WP 0007 00 0WP 0028 00 0WP 0008 00 0WP 0029 00 0WP 0009 00 0WP 0030 00 0WP 0010 00 0WP 0031 00 0 Chp 3 title page 0WP 0032 00 0WP 0011 00 0WP 0033 00 0 Chp 4 title page 0WP 0034 00 0WP 0012 00 0WP 0035 00 0WP 0013 00 0 Sample DA Form 2028 0WP 0014 00 0 Blank DA Form 2028 0WP 0015 00 0 Authentication Page 0WP 0016 00 0 Back Cover 0WP 0017 00 0* Zero in this column indicates an original page or work

5 3-4240-349-12&PTECHNICAL MANUALOPERATOR AND UNIT MAINTENANCE MANUALFORPROTECTION ASSESSMENTTEST SYSTEM, M41(NSN: 4240-01-365-8241)REPORTING ERRORS AND RECOMMENDING IMPROVEMENTSYou can help improve this manual. If you find any mistakes or if you know of a wayto improve the procedures, please let us know. army Users - mail your letter orDA Form 2028 (Recommended Changes to Publications and Blank Forms), located inthe back of this manual, directly to: Director, Edgewood CB Center,ATTN: AMSSB-RBD-B (D. Storms, E3549), 5183 Blackhawk Road, Aberdeen ProvingGround, MD 21010-5424. A reply will be furnished to you. Marine Corps Users: submitNAVMC 10772 to: Commander, Marine Corps Logistics Bases, Code G316, 814 RadfordBlvd, Albany, GA 31704-1128. Air Force Users: Recommendations for improving thismanual will be forwarded through command channels to HQ AFCESA/CEXR,139 Barnes Drive, Suite 1, Tyndall AFB, FL 32403-5319, according to STATEMENT C: Distribution authorized to Government Agencies and theircontractors.

6 This publication is required for administrative and operational purposes, as determinedon 10 March 1998. army requests for this document must be referred to Technical Director, Soldierand Biological Chemical Command, ATTN: AMSSB-RBD-B (D. Storms, E3549), 5183 BlackhawkRoad, Aberdeen Proving Ground, MD 21010-5424. Marine Corps: Request for this document mustbe referred to Commandant of the Marine Corps (ARD), Washington, DC OF CONTENTSWP Sequence SUMMARYCHAPTER 1 - INTRODUCTORY INFORMATION WITH THEORY OF OPERATIONG eneral 00 Equipment Description and 0002 00 Theory of 0003 00iTM 3-4240-349-12&PTABLE OF CONTENTS - ContinuedWP Sequence 2 - OPERATOR INSTRUCTIONSC ontrols and 0004 00 Operation Under Usual 0005 00 Operation for M17 Series 0006 00 Operation for M40/M42/M45 Series 0007 00 Operation for MCU-2A/P 0008 00 Operation for Interspiro CW (Firefighter s) 0009 00M41 PATS Operation Under Unusual 0010 00 CHAPTER 3 - TROUBLESHOOTINGI ntroduction, Malfunction Index, and Troubleshooting 0011 00 CHAPTER 4 - OPERATOR MAINTENANCE INSTRUCTIONSM41 Service Upon 0012 00M41 Preventive Maintenance Checks and Services (PMCS).

7 0013 00 Clearing the 0014 00 Changing the Alcohol and Alcohol 0015 00 Cleaning the Storage Cap and Alcohol 0016 00 Drying the Twin Tube 0017 00 Trimming the Ends of the Twin Tube 0018 00 Setting the Internal Dip Switches - Air Force & Surety 0019 00 Preparation for Storage and 0020 00 Peacetime Demilitarization 0021 00 Turn-In Procedures for Repair or 0022 00 CHAPTER 5 - SUPPORTING 00 Maintenance Allocation Chart (MAC).. 0024 00 Repair Parts and Special Tools 00 Group 00 M41 00 National Stock Number 0027 00 Part Number 0028 00 Components of End Item and Basic Issue Items 0029 00 Additional Authorized Items 0030 00 Expendable and Durable Items 0031 00 Storage, Care and Disposal of Lithium 0032 00 Storage, Care and Disposal of Alcohol and 0033 00 Material Safety Data 0034 00 Warranty 00iiTM 3-4240-349-12&PCHAPTER 1 INTRODUCTORY INFORMATIONWITHTHEORY OF OPERATIONFORM41 PROTECTION ASSESSMENT TEST SYSTEMM41, Protection Assessment Test SystemTM 3-4240-349-12&PGENERAL INFORMATION0001 000001 00-1TM 3-4240-349-12&PGENERAL INFORMATION0001 00 SCOPEType of Manual: Operator and Unit Maintenance Manual (Including Repair Parts and Special ToolsLists).

8 Model Number and Equipment Name: M41 Protection Assessment Test System (PATS).Purpose of Equipment: Validates the facepiece fit and proper function of the protective FORMS, RECORDS, AND of the army forms and procedures used for equipment maintenance will be thoseprescribed by DA PAM 738-750, Functional Users Manual for the army Maintenance ManagementSystem (TAMMS). Marine Corps personnel refer to the on-line Marine Corps Publication DistributionSystem (MCPDS) or Marine Corps Stock List SL-1-2, Index of technical publications. Marine Corpspersonnel will use TM 4700-15, Equipment Record EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR).If your M41 PATS needs improvement, let us know. Send us an EIR. You, the user, are the only onewho can tell us what you don t like about your equipment. Let us know why you don t like the designor performance. Put it on an SF 368 (Product Quality Deficiency Report).

9 Mail it to the addressspecified in DA PAM 738-750, Functional Users Manual for the army Maintenance ManagementSystem (TAMMS), or as specified by the contracting activity. We will send you a reply. MarineCorps users submit SF 368 IAW MCO to: Commander, Marine Corps Logistics Base,Code G316, 814 Radford Blvd, Albany, GA 31704-1128. Air Force personnel will submit MaterialDeficiency Reports IAW PREVENTION AND CONTROL (CPC).Corrosion Prevention and Control (CPC) of materiel is a continuing concern. It is important that anycorrosion problems with this item be reported so that the problem can be corrected and improve-ments can be made to prevent the problem in future corrosion is typically associated with rusting of metals, it can also include deterioration ofother materials, such as rubber and plastic. Unusual cracking, softening, swelling, or breaking ofthese materials may be a corrosion 00-2TM 3-4240-349-12&PGENERAL INFORMATION0001 00If a corrosion problem is identified, it can be reported using SF 368, Product Quality DeficiencyReport.

10 Use of key words such as corrosion , rust, deterioration, or cracking will ensure thatthe information is identified as a CPC problem. The form should be submitted to the addressspecified in DA PAM 738-750, Functional Users Manual for the army Maintenance ManagementSystem (TAMMS). Marine Corps users should report corrosion problems using MCO ,Quality Deficiency OF MATERIEL TO PREVENT ENEMY to TM 43-0002-31 for methods of destruction. War-fighters destroy by weapons, fire, smash-ing, disassembly, burning, or any other means to render the equipment useless to the FOR STORAGE OR for short term and long term storage are contained in Chapter 4, WP 0020 00. SeeChapter 5, WP 0035 00 for Warranty 00-3TM 3-4240-349-12&PEQUIPMENT DESCRIPTION AND DATA0002 00 EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURESCHARACTERISTICSThe M41 PATS is a small portable instrument designed to provide the war-fighter with a simple,rapid, and accurate means of validating the facepiece fit and proper function of their protective AND FEATURESThe M41 PATS is less than 100 in3 in size, weighs approximately 4 lbs, and its function is based on aminiature Condensation Nucleus Counter (CNC).