Beck, R&J Automobile Parts 14-10 Manual De Usuario

24

CALIBRATION

 

Adjustment of the total drive stroke within the 

factory-set travel range is easily accomplished 
by the use of the Beck Calibar, Figure 7.  The 
switches and feedback device are simultaneously 
adjusted to maintain full input span when the 
Calibar setting is changed.  For stroke lengths 
longer than the factory-set travel limits, consult 
the factory.  Adjust the drive stroke as follows:
 1.  Remove the top cover.  The protective O-ring 

seal will remain in the rim of the top cover 
when removed.

 2. The Calibar index is graduated directly in 

inches, which corresponds to the drive travel 
span.

 3.  Loosen the two locking screws on the Calibar 

block with an 1/8" hex wrench (See Figure 7, 
this page).

 4. Slide the Calibar block, aligning the notch 

with the desired travel span on the Calibar 
index.  Tighten the set screws.

 NOTE:  If increasing the travel span within 
the factory-set travel range, a portion of 
the upper mechanical stop will have to be 
removed and the Calibar index plate notch 
should be enlarged to accommodate the 
adjustment of the Calibar block to the new 
stroke.
  

 5.  Use the Handswitch to operate the drive and 

check the stroke on the travel index of the 
valve yoke.

 6. Replace the top cover after making 

adjustments.  Tighten the top cover just 
enough to compress the O-ring seal.

 

The Calibar adjustment is designed to allow 

field changes of the total drive stroke with the 
same maximum input signal applied (e.g., a 
change from 1 1/2" stroke with 20 mA input signal 
to a 1“ stroke with 20 mA input signal).
 

The span adjustment on the ESR-4 board is 

used to maintain the drive stroke when a change
in input signal (or span) is required (e.g., a 
change from 3/4" stroke with a 20 mA maximum 
input signal applied to 3/4" stroke with an 18 mA 
maximum input signal applied).