MTS Axial Extensometers - Manual (Page 55)

Installation 55
1. The arms of the extensometer must be in the zero reference
position. Depending on the extensometer, this can be accomplished
using the zero pin, stop block, or a special fixture.
The extensometer arms can be damaged when mishandled.
Excessive torque on the extensometer arms can damage the
extensometer.
Use an adjustable wrench to hold the extensometer arm or attachment
adapter. Loosen or tighten only those socket head cap screws on the
arm being held with the wrench. Do not hold the extensometer case
when loosening or tightening the socket head cap screws.
2. Using a small adjustable wrench, grasp the sides of one attachment
adapter.
.
3. While securely holding the attachment adapter, loosen the spring
locking screw on that attachment adapter with a hex wrench.
4. Repeat Step 2 and Step 3 to loosen the spring locking screw on the
other attachment adapter.
5. While measuring the wire end length, slide the spring in or out as
required for the specimen diameter or thickness.
CAUTION
Grasp the attachment
adapter with a small
adjustable wrench
when using the hex
wrench.
Spring
Locking
Screw
Hex Wrench