Tension Testing Procedure; Repair Of Mt Test Stand - Ametek CHATILLON MT Série Manuel D'utilisation

6.0 TENSION TESTING PROCEDURE

6.1. Establish the platform location in reference to its travel so that the deflection
requirements for the test to be made will be accomplished before the platform
reaches the limit of its stroke. For example: if the test requires 2 inches of deflec-
tion, ensure the platform will travel the required 2 inches before stopping. Allow
additional travel for the deflection of the force gauge.
6.2. Place test specimen in upper grip or hook and zero the force gauge. Then attach
test specimen to lower grip or hook.
6.3. If deflection measurements using the ruler assembly are required, take note of
reading on ruler when the test specimen is taut between the grips or hooks. This
point can be determined by monitoring the force gauge indicator while slowly
lowering the lower grip or hook. Stop the platform travel the moment a force is
registered on the gauge and then back off very slightly. At this point, note the
reading on the ruler. The ruler may be adjusted on the rod to line up with the
pointer for easier reading. The CHATILLON force gauges have different deflection
and this must be accounted for when taking deflection measurements. Refer to
TABLE 1 for deflection of each model gauge at full scale. Example: If A DPP 50 LB
gauge was loaded at 50 LB (full scale) and the deflection on the ruler indicated 2.0
inches, the true movement of the sample was 1.9 inches due to the shaft of the
DPP force gauge moving 0.1 inches.
6.4. When using the digital indicator it is necessary to compensate for deflection of
the force gauge when performing a tension test. To obtain the true deflection
of the test specimen refer to TABLE 1 for the full scale deflection for each force
gauge model. Example: If A DPP 50 LB gauge was loaded at 25 LB (half scale)
and the deflection on the digital indicator was 2.000 inches, the true movement of
the sample was 1.950 inches due to the shaft of the DPP force gauge moving .05
inches.

7. REPAIR OF MT TEST STAND

If MT test stand becomes damaged, please contact a local AMETEK distributor to obtain
spare parts or repair service.
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MT Series User Manual