Vernier Motion Encoder System - Manual (Page 5)

9
The Low-g Accelerometer (LGA)
The LGA is attached to one of the side slots of the cart using the #10-32 x 3/8″ hex
head screw and the small threaded barrel. The LGA is attached on one side only to
maintain the correct orientation of the sensor.
1. Insert the #10-32 x 3/8″ hex head screw into one of the mounting holes of the
LGA from the bottom and screw on the barrel a few turns, leaving at least half of
the screw threads exposed for fitting into the slot.
2. Use the arrow printed on the sensor to decide which of the cart side slots to use so
that the sensor is oriented in the desired direction.
3. Slide the head of the screw into the chosen slot from the flared end, position the
sensor as required, and tighten the small barrel to secure it to the cart.
DFS and LGA in Combination
The DFS (Dual-Range Force Sensor) and LGA (Low-g Accelerometer) can be
combined using the same procedures.
As long as the DFS is positioned so that the attachment to be used is facing in the
required direction, the order of attachment is not critical.
10
MASS and DFS
Attach the DFS first, since the plastic screw on the DFS becomes inaccessible when
the MASS is attached.
The DFS must be attached at the opposite end of the cart from the slot flares if you
want to be able to remove the mass without removing the DFS.
MASS and LGA
For this combination, the order of attachment is not critical.
MASS, DFS, and LGA
This is a similar case to the MASS and DFS, where the DFS must be attached first.
There is sufficient room on the new MASS bolt to piggyback the LGA on top of the
mass before attaching the small barrel.