hydratight BoltScope Pro, Руководство по эксплуатации

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BOLTSCOPE PRO - Bolt Tension Monitor
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8) Press the OK key to set the Threshold and return to the menu screen,
or ESC to cancel entering the Threshold .
9) Finally, press the MEAS key to return to the measurement screen and
begin taking readings.
12.6 Gate
The BOLTSCOPE PRO is equipped with a single gate typically used to eliminate
noise that is present prior to the reflection off the end of the bolt, and also to force
a detection at or on a specific location or waveform. Often times the first
reflection off the end of the bolt will produce a poor signal. However, if the user
looked further out in time (length), a reflection from a mode conversion very well
may be a better alternative signal to detect on. A mode conversion is simply a
reflection of energy that took a longer path, reflecting off the sidewalls of the bolt,
resulting in a return echo slightly longer than the overall length of the bolt. Use of
a gate allows the user to force the
BOLTSCOPE PRO to use this signal for
measurements.
Another potential issue is general transducer or low frequency noise. In this type
of situation, the noise interferes with the
BOLTSCOPE PRO , and is high enough
in amplitude to cause the BOLTSCOPE PRO to detect on the noise rather than
the true return reflection. The diagrams below illustrate both cases:
Note: In order to adjust the gates they must be activated. The gates will only be
active if the measurement mode is set to P-E GT (pulse – echo w/gate). In
standard P-E (pulse echo) mode, the gates are not active.