Click Here to
Order this information in Print

Click Here to
Order this information on CD-ROM

Click Here to
Download this information in PDF Format

 

Click here to make tpub.com your Home Page

Page Title: TROUBLESHOOTING
Back | Up | Next

Click here for a printable version

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Combat
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
USMC
   
Products
  Educational CD-ROM's
Printed Manuals
Downloadable Books

   
Back
Figure 1-4.—Flowmeter Calibration Kit
Up
Aircrew Survival Equipmentman 1 & C - Aviation theories and other practices
Next
Figure 1-5.—Test Stand Accessories

beginning   with   the   0-to-150-lpm   flow   element (FLM-4),   proceed   as   follows: 1.   Using   hose   assembly   3   (figure   1-5),   con- nect   the   top   connection   of   the   500-to-750-mm calibration   kit   flowmeter   9   (figure   4-4)   to   test stand   flow   element   connection   NIP-4.   Using   hose assembly   6   (figure   1-5),   connect   the   bottom   con- nection  of  the  calibration  kit  flowmeter  to  bell  jar base   coupling   C-1. 2.   Set   flowmeter   selector   valve   V-1   to   the 0-to-150-lpm   position.   Ensure   system   bleed   valve V-5   is   closed. NOTE:   Flows   used   shall   be   taken   from   the mm   column   of   the   calibration   correction   cards. This   previously   completed   column   contains   flows in   millimeters   (mm)   equivalent   to   corresponding lpm   flows. 3.   Using   oxygen   supply   valve   V-6,   set   the flow   equivalent   to   150   lpm   (from   correction   card number   4)   on   the   500-to-750-mm   calibration   kit flow   element.   The   flow,   in   inches   H2O,   will   be displayed   on   flowmeter   indicator   PG-2.   Enter   this reading   in   the   indicated   in.   H2O    c o l u m n    of correction   card   number   4   opposite   the   actual   mm flow   being   drawn. 4.   Reduce   the   flow   to   the   next   millimeter reading   by   adjusting   oxygen   supply   valve   V-6. Repeat   step   3.   Continue   in   this   manner   until   all flows   on   correction   card   number   4   have   been completed. 5.   Close   oxygen   supply   valve   V-6   and   discon- nect   the   hose   and   the   calibration   kit   flowmeter from   the   test   stand. NOTE:   Hose   assembly   3   (figure   1-5)   and   hose assembly   6   are   used   in   calibrating   all   linear   flow elements. 6 .    C o n n e c t    t h e    t o p    c o n n e c t i o n    o f    t he 250-to-500-mm   calibration   kit   flowmeter   to   test stand   flow   element   connection   NIP-3;   connect   the bottom   connection   to   bell   jar   base   coupling   C-1. Rotate   flowmeter   selector   valve   V-1   to   the 0-to-50-lpm   position.   Ensure   system   bleed   valve V-5   is   closed. 7.   Repeat   procedures   outlined   in   steps   3 through   5,   using   flows   given   on   correction   card number   5. 8 .    C o n n e c t    t h e    t o p    c o n n e c t i o n    o f    t he 125-to-250-mm   calibration   kit   flowmeter   to   test stand   flow   element   connection   NIP-2;   connect   the bottom   connection   to   bell   jar   coupling   C-1. Rotate   flowmeter   selector   valve   V-1   to   the 0-to-1.0-lpm   position.   Ensure   system   bleed   valve V-5   is   closed. 9.   Repeat   procedures   outlined   in   steps   3 through   5,   using   flows   given   on   correction   card number   6. 1 0 .    C o n n e c t    t h e    t o p    c o n n e c t i o n    o f    t he 0-to-125-mm   calibration   kit   flowmeter   to   test stand   flow   element   connection   NIP-1;   connect   the bottom   connection   to   bell   jar   base   coupling   C-1. Rotate   flowmeter   selector   valve   V-1   to   the 0.0-to-0.25-lpm   position.   Ensure   system   bleed valve   V-5   is   closed. 11.   Repeat   procedures   outlined   in   steps   3 through   5,   using   flows   given   on   correction   card number   7. 12.  Disconnect  hoses  3  and  6  (figure  1-5)  from the   calibration   kit   and   test   stand.   Close   oxygen supply   cylinder   valve   V-6   and   open   system   bleed valve   V-5   to   bleed   the   test   stand.   Secure   all   test stand   valves. TROUBLESHOOTING A   properly   working   test   stand   will   give   you outstanding   results   while   testing   oxygen   con- verters.   As   with   any   test   stand,   a   small   leak   in your   plumbing   system   will   give   you   inaccurate readings   and   may   cause   you   to   think   you   have a   defective   converter   or   component.   Some   parts on  the  59A120  test  stand  must  be  corrected  when they   become   defective   by   the   on-site   meteorology calibration   team.   You   might   have   a   gage   that   has a   pointer   which   isn’t   zeroed,   or   you   might   have a  flow  element  that  consistently  reads  low.  You could   also   have   a   gage   that   provides   correct readings   over   only   part   of   the   scale.   In   such   cases, you   will   need   the   calibration   team’s   assistance   to repair   the   component. Upon   completion   of   any   maintenance   action, you  will  be  required  to  fill  out  a  Ground  Support Equipment    Subcustody    and    Periodic    Maintenance Record   (OPNAV   4790/50)   and   a   Ground   Support Equipment   Custody   and   Maintenance   Record (OPNAV   4790/51). The   following   problems   may   occur   within your   test   stand;   you,   as   a   senior   PR,   will   be r e q u i r e d    t o    f i x    t h e m .    R e f e r    t o    N A V A IR 17-15BC-20   for   parts   removal   and   replacement. PG-1   Reads   Low The  0-160  psig  pressure  gage  is  used  to  indicate pressure   applied   to   an   item   under   test.   Anytime 1-8

Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing