3.17 Automatic Dataset® Arms Operation 
Auto Dataset® arms are a faster and more accurate method to take rim 
measurements than traditional methods. Auto Dataset® arms are used to input rim 
distance, rim width, and weight plane location automatically. The Dataset® Arms of 
the GSP9720JLR are positioned on the weight plane and data is entered by 
depressing the foot pedal. 
Auto Dataset® arms also input weight position measurements for balancing. 
Automatic Weight Position Measurement 
The Dataset® arms can be used to enter weight position dimensions instantly and 
accurately. The arms are “triggered” when they are moved away from their home 
position. When the arms are triggered, a blinking graphic depicting the Dataset® arm 
on the “Dimension Entry” screen identifies the plane currently being inputted. 
INNER DATASET
ARM TRIGGERED
(BLINKING) 
In most cases, the Dataset® Arms are used to input the exact weight position. 
The exact weight position is entered by holding the arm(s) stable in the desired 
location and depressing the foot pedal to enter the dimensional data. 
Manual Weight Position Measurement 
NOTE:  If optional HammerHead™ TCD weight locator is installed, 
the weight should be applied at the location marked by the 
laser. Refer to “3.23 Optional HammerHead™ TDC Laser 
Adhesive Weight Locator,” on page 76.
While on the “Set Dimensions” view of the “Balance” primary screen, the control knob 
can be used to enter rim dimensions manually. 
GSP9720JLR Wheel Balancer Operation Instructions  Balancing Procedures 
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