TM 55-920-328-13 (1)   Electrically  zero  the  appropriate  torque indicators: TORQUE/PRESSURE  digital  indicator  (4,  fig-ure  1- 22) TORQUE PRESSURE indicator (2, figure 1-24) T55-L-7 series torque indicator (2, figure 2-7) T55-L-11/712 torque indicator (3, figure 2-7) (2)      Depress  the    R/CAL  pushbutton  switch  on  the data selector assembly (7, figure 1-22).  (This action will drive   the   appropriate   indicator   upscale   or   provide   a display  on  the  digital  voltmeter  type  of  instrumentation.) The   readout   obtained   must   correspond   to   the   R/CAL factor established for the torque system being checked.  If the readout is not within the specified tolerance, calibrate the   torque   system   in   accordance   with   the   applicable periodic  procedures  outlined  in  TB  55-4920-328-50  prior to   proceeding   with   the   following   checkout   procedures. The tolerances for the torque systems to be checked are as follows: T53 Turboprop Engines +100 inch-pounds T53 Turboshaft Engines +50 inch-pounds T55 Turboshaft Engines f50 inch-pounds T63 Turboshaft Engines +25 inch-pounds T74 Turboprop Engines i50 inch-pounds T73 Turboshaft Engines ±50 inch-pounds T700 Turboshaft Engines -+25 inch-pounds an.      Place  the  FUNCTION    control  (3,  figure  1-23)  in TEST.  The GAS PRODUCER speed monitor unit digital indicator (1) must indicate 2381 + 1 for all engines except T700  and  0468  will  be  the  factor  used,  and  repeat  the reading  until  the  FUNCTION  control  setting  is  changed. After verification of instrument self test, place the control in  RUN.    The  digital  display  unit  will  display  all  zeros, unless there is an input signal from the remote sensor or transducer. a  o.      Place  the  FUNCTION  control  (8)  in  TEST.    The POWER TURBINE speed monitor unit digital indicator (6) must  continuously  display  2381  1  for  all  engines  except T700  and  0750  will  be  the  factor  used,  and  re-  peat  the reading  until  the  FUNCTION  control  setting  is  changed. After verification of instrument self test, place the control in RUN.  The digital display will indicate all zeros, unless there   is   an   input   signal   from   the   remote   sensor   or transducer. ap.      Place  the  FUNCTION    control    (13)  in  TEST.  The OIL    FLOW/CONSUMPTION    monitor    unit    (11)    must display 1000 and repeat the reading until the FUNCTION control  setting  is  changed.    After  verification  of  self  test, place  the  control  in  RUN.    The  digital  indicator  will  then display a random read- out, depending on the input signal from the oil quantity probe. aq.      Place  the  FUNCTION    control  (18)  in  TEST.  The FUEL FLOW monitor unit (16) must display the pre-set K factor and repeat the reading until the FUNCTION control setting is changed.  After verification of self test, place the control in RUN.  The digital indicator will then display all zeros,  unless  there  is  an  input  signal  from  the  remote transducer. 2-10.  Multi-Channel Vibration Meter. Functional  check  should  be  made  of  the  multi-  channel vibration meter 2A3 (21, figure 1-23) prior to initial usage, and   prior   to   daily   operation,   in   accordance   with   the following: NOTE The  following  instructions  are  typical  for  each channel in the unit. a.    Energize  the  METS    electrical  system  as  outlined  in paragraph 2-9. b.    Allow    a  10-minute  warmup    and  stabilization  period prior to adjustment of the multi-channel vibration meter. NOTE The following instructions must be accomplished with the engine accessories vibration transducers electrically connected to the appropriate  connectors  on  the  data  acquisition assembly  (unit  11).    Refer  to  paragraphs  2-14 through  2-35  as  applicable,  for  information  on interconnection instructions. c.  Verify that the on-off switch on the rear panel is in the ON position. NOTE If    the    vibration    pickup    sensitivity    is    known, proceed    to    step    (g).        If    the    sensitivity    is unknown,  accomplish  the  entire  procedures  in the following text. d.      Check   to   ensure   that   all   channels   of   the   unit   are electrically connected to the data acquisition assembly.  If the vibration pickups used in engine Change 4    2-51