Mts Material Test Systems Manual do Utilizador descarregar pdf (Página 49)

through the system interlock. Likewise, if the feedback falls below the preset lower limit detect level, the limit

detector will (if enabled during test setup) stop the test through the system interlock.

Table 7: Upper and lower limit detector levels

DescriptionItem

Full-scale operating range1

Upper limit detect level2

Upper limit detected3

Lower limit detect level4

Lower limit detected5

The limit detectors should be set to minimize the chances of accidental damage to test specimens and test

equipment. They are typically set to shut down the test system upon specimen failure in order to prevent

fixturing or equipment damage. Under no circumstances should the limit detectors be relied on to protect

personnel.

In order to calculate the upper and lower limit detector levels, the maximum and minimum test forces or

displacements must be known. However, in some cases, the upper and lower limits cannot be determined

before testing. The following paragraphs describe how to determine limits in both of these situations.

MTS Material Test System Operation 49

6.0 Getting Started

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Mts Material Test Systems Manual do Utilizador Página 49