Compression Testing Procedure - Ametek CHATILLON MT Série Manuel D'utilisation

5.0 COMPRESSION TESTING PROCEDURE

5.1. 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.
5.2. Center the test specimen on platform and adjust height of force gauge above
platform to desired height using the 6mm hex key provided.
5.3. If deflection measurements using the ruler assembly are required, take note of
reading on ruler when gauge plate touches the test specimen. This point can
be determined by monitoring the force gauge indicator while slowly raising the
platform. 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.
Gauge Model
DPP, DPPH
LG/DG
DFIS/DFE2/DFS2/DFX2
DFGS integral load cell
DFS-R 250 g to 10 LB
DFS-R 50 LB to 500 LB
5.4. When using the digital indicator it is necessary to compensate for deflection of the
force gauge when performing a compression 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.
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MT Series User Manual
.100 inches at full scale (1 revolution)
10mm (.394 inches) at full scale (1 revolution)
DFM .015 inches at full scale
.007 inches at full scale
.010 inches at full scale
.015 inches at full scale
.008 inches at full scale
Load Cell/Spring Deflection
TABLE 1