ENGINE DIAGNOSTIC TOOLS Section 4 DESIGN   TECHNOLOGY   "TECH   TIME"   Model   3354 Dynamic Timing Meter (For 6.9 Liter Diesel) DESCRIPTION OF FRONT PANEL AND ATTACHMENTS  (All  Reference  Nos.  refer  to  Figure 10) • The   Function      Control   Switch   (1)   has   four positions: - LIGHT   -   Selects   the   timing   method   of crankshaft monitoring. - PROBE    -    Selects    the    magnetic    probe method of crankshaft monitoring for engines equipped with a probe holder over the  vibration  damper,  as  in  the  6.9  Liter Diesel. - OFFSET    -    When    in    this    position,    the "Degree Display" will indicate the number of degrees after TDC that the magnetic probe access hole is located. - AVE.   -   Controls   the   number   of   seconds over   which   RPM   pulses   are   averaged. When switched to this position, the unit will display  "AVE.    1.4".    This  represents  the initial   1.4   second   averaging   time   set   in when power is first applied.  To change this number  [with  switch  in  AVE.  position]  tap either the or "Adjust" button to decrease or increase the averaging time.  Each tap of the   button   will   change   the   time   by   0.1 second.      Total   adjust   range   is   0.1   to   6 seconds.        This    adjustment    allows    the operator  to  monitor  engine  speed  variation to whatever response time is desired.  For most purposes, an averaging time of 1 to 2 seconds gives a steady reading. • SOCKET (2) to connect timing light. • JACK (3) to connect magnetic probe. • PICK-UP  (4)  for  bayonet  connector  to  connect clamp-on transducer. • ADJUST    BUTTONS    (5)  used  to  change  the offset of the timing unit to agree with the off-set of   the   magnetic   probe   access   hole   on   the engine,  or  to  change  the  averaging  time  of  the display. • TRIGGER  POINT  SWITCH    (6)  used  to  select the point on the fuel pressure curve at which the timing unit will trigger. IMPORTANT USE   HIGH   TRIGGER   SETTING   ONLY   FOR THE 6.9 LITER. • POWER SOURCE CLIPS (7) to be connected to vehicle battery RED to "+", BLACK to “ - “. CAUTION! Observe   polarity,   the   timing   unit   itself   is protected  against  reverse  polarity,  however, damage to the cables may result! • CLAMP  ON    TRANSDUCERS    (8)  available  in three  sizes:  1/4  in  (black),  6  mm  (green)  and  5 mm (red). • TRANSDUCER CONNECTING CABLE (9). • TIMING LIGHT (10). • DISPLAY  (11):  Left side shows RPM, right side indicates DEGREES OF ADVANCE, PROGRAMMED    OFFSET    and    AVERAGING TIME. CGES-240-4 Printed in United States of America Page 13