Section  7  —  Analyzing  Measurements  Onsite 
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Set Y Axis (Amplitude) Scale 
 
You  can  toggle  the  left  axis  scale  between  Linear,  Log,  and dB  to 
increase  or  decrease  the  amplitude  of  the  peaks  displayed.  This  enables 
you  to  see  the  bigger  picture  or  access  a  more  detailed  view  of  your 
data.  The  Linear  scale  is  suitable  for  most  cases.  Log  scaling  (base  10)  is 
more  useful  for  displaying  vibration  for  very  large  or  very  small 
amplitudes. 
 
To  access  the  required  option: 
1.  Display  the  spectrum  measurement  on  your  screen. 
2.  Highlight  your  spectrum  measurement. 
3.  Press    >  Press   Y  Axis  Log  to  set  the  Y  axis  (amplitude) 
scaling  options. 
4.  Press    Linear  Log  dB  repeatedly  to  toggle  between  Linear,  Log, 
and  dB  scaling.   
 
NOTE: VdB and adB scaling are only available when you measure 
velocity and acceleration respectively.  
 
5.  Press    Y  Axis  Max  —  This  is  the  highest  amplitude  value  that  will 
be  displayed  on  your  screen.  
6.  Use  the  arrow  keys  to  highlight  a  value  >  Press    to  select  the 
value.   
7.  Press    Y  Axis  Range  repeatedly  to  toggle  the  Y  Axis  range  — 
This  selects  the  lowest  amplitude  value  that  will  be  displayed  on 
your  screen,  relative  to  your  chosen  Max  value. 
8.  Press    when  you  have  finished  to  return  to  the  measurement 
screen.