User`s manual
Accurate Technology ProScale  Page 20 of 48 
Guide Clip
1.  Note the orientation of the ReadHead on the Scale.  Be sure the arrow 
on the ReadHead points towards the “BLACK END OF SCALE”.  This 
orientation is critical for proper operation.  Be sure the mounting location 
for the ReadHead and Scale will allow this orientation. Take care when 
sliding  the  ReadHead  onto  the  Scale  so  the  brass  “fingers”  inside  the 
ReadHead  do  not  get  damaged.  (A  slight  “wiggling”  motion  when 
installing the ReadHead will simplify the process.) 
2.  Determine  an  appropriate  mounting  location  for  the  system. 
Recommended  Model  250  applications  usually  have  the  Scale  held 
stationary while the ReadHead is moved along the Scale. However, the 
ProScale will read correctly if the ReadHead is moved along the Scale or 
if the Scale is moved through the ReadHead.  
3.  When  installing  the  Model 250,  you  should  use  the 
Guide  Clip  to  move  the  ReadHead  along  the  Scale 
(see figures on next page). Mount the Scale using the 
included  8-32  screw  (or M4)    Be sure  the  screw 
heads  do  not  protrude  above  the  surface  of  the 
extrusion. Check that the Scale is properly aligned as 
the  ReadHead  is moved  over  its  length  (the  Guide 
Clip  will  compensate  for  slight  misalignment  in  one 
direction).    Adjust  Scale  alignment  if  necessary.  For 
accurate  measurements,  the  guide  clip  must  be 
mounted perpendicular to the direction of travel of the ReadHead.  The 
guide clip should exert some pressure over the full range of travel on the 
ReadHead so the two move as a single unit. Failure to use the guide clip 
could void the warranty. 
4.  The Display may be mounted in a location which allows for easy viewing 
by the operator.  The location of all parts should also safeguard the cable 
from  possible  damage.    ProScale  wiring  should  be kept  away  from 
electrical wiring and motors.  Plug the ReadHead into the Display.  See 
Section 4: DISPLAY OPERATION 
Note:  If any other mounting method is used, observe the following: 
•  Do not drill through the green portion of  the Scale at any point over 
which the ReadHead will travel. 
•  Do not mount the Scale so the mounting hardware interferes with the 
movement of the ReadHead. 










