Section  4  ā  Measurement  Types  and  their  Uses 
93 
3 ā Perform Trial Impact 
 
Once  you  have  set  up  your  channels  and  sensors,  and  created  a 
numerically  labelled  machine  impact  test  plan,  you  will  need  to  perform 
a  few  trial  impacts.  Data  quality  messages  display  when  execute  trial 
impacts  to  help  ensure  you  have  the  right  setup  to  measure  the 
frequency  of  interest.  If  required,  you  can  disable  these  warning 
messages.   
 
NOTE: Trial data is not retained.  
 
To  run  a  trial  impact: 
1.  Press    or    Measure.   
2.  Press    to  scroll  and  select  Modal  Impact  Testing  >  Press  . 
3.  Select  the  required  modal  impact  test  >  Press  . 
4.  Connect  your  impact  hammer  to  the  CH1  port  on  your  instrument. 
5.  Connect  your  sensor.   
6.  Press    to  confirm  your  hammer  and  sensor  are  connected 
correctly. 
7.  Wait  for  the  instrument  to  settle. 
8.  Use  your  hammer  to  impact  the  relevant  point  on  the  machine  you 
are  examining. 
 
TIP: Ensure you keep track of the points on the machine you are 
measuring as you will need to specify these once you have run a 
modal impact test.