PASCO AP-8214A Stress_Strain Apparatus - Manual (Page 4)

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S t r e s s / S t r a i n A p p a r a t u s 0 1 2 -1 3 2 8 2A E q u i p m e n t S e t - u p
4
About the Apparatus
The lever arm on the Stress/Strain Apparatus is a Class III lever that
transmits the applied force to the Force Sensor. The length of the
lever arm from the pivot to the Force Sensor attachment is five times
longer than the length of the lever arm from the pivot to the coupon
clamp that is part of the lever arm. The force applied to the test cou-
pon is five times more than the force measured by the Force Sensor.
Therefore, each DataStudio set-up file uses a calculation that multi-
plies the measured force by five.
Equipment Set-up
1. Attach the Rotary Motion Sensor to the apparatus platform.
• Remove the rod clamp from the RMS.
• Place the three-step pulley (Item 6) onto the shaft of the RMS with the largest pul-
ley on the outside. The three-step pulley should be on the “clockwise positive” side
of the RMS as shown in the figure.
• Place the RMS on the platform as illustrated below. Use the two thumbscrews to
fasten the RMS to the platform from beneath.
• Seat the belt (Item 7)on the middle step of the three-step pulley and the groove on
the crankshaft.
2. Attach the Force Sensor to the apparatus platform.
• Remove the hook from the Force Sensor and replace it with the force sensor
attachment (Item 3, included).
• Place the Force Sensor on the apparatus platform by putting the support rod
mounting hole onto the Force Sensor post.
• Insert the long thumbscrew supplied with the Force Sensor through the hole on the
Force Sensor marked “Cart” and screw it into the threaded hole in the apparatus
platform.
• Tighten the setscrew (Item 4) in the support rod mount of the Force Sensor.
3. Clamp down the apparatus (optional). Use a large C-clamp to clamp the Appa-
ratus Platform to the edge of your bench or table. One side of the platform has
three feet. In order to avoid bending the platform, position the clamp directly over
the center foot.
Fig. 5: Force calculation
ScienceWorkshop
PASPORT
Fig. 6: Three-step
pulley on the
“clockwise positive”
side of RMS