DAKOTA ULTRASONICS DFX-7, Руководство пользователя

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DFX-7
Ultrasonic Flaw Detector
83
7.6 Understanding the features of the Gate
Important: It is recommended to spend some time in this section. The sections that
follow are procedures for using the features associated with the Gates, in some way.
There are 3 gates in the
DFX-7
, and as a result, operating and setting them up can
become somewhat convoluted, to say the least. However, a thorough understanding
of the functionality presented in this section, will reveal how easy they actually are to
operate overall. The following diagrams illustrate the features of all 3 gates,
according to the measurement mode selected:
Note: This is a general overview and should be referred to in conjunction with the
detailed feature sections that follow.
Modes # Gates Gate # Start HoldOff Width Threshold
PE 1,2,or 3 1 √ √ √
2 √ √
3 √ √
PECT 1,2,or 3 1 √ √ √
2 √ √
3 √ √
PETP 1,2,or 3 1 √ √ √
2 √ √
3 √ √
EE 2 1 √ √
2 √ √ √
3
EEV 3 1 √ √
2 √ √
3 √ √
CT None None None None None None
Diag. 1 Gate Features vs Modes
In
diagram 1 , the gates have been associated with the measurement modes, along
with the features available to every gate. For example, echo-echo mode (EE) has 2
gates available, while echo-echo verify (EEV) has 3. These gates have been
designed to work in order, from 1 to 3, and cannot be used any other way.
Therefore, the user must be using gate 2 before they can activate and use gate 3.
Note: Gate 1 is on at all times, as a gate must be activated to get a measurement.
Each gate has a given set of features to fine adjust the settings of the gate. Let’s
have a look at the feature set:
Start (Gate1): This feature is only available to gate 1, and determines the start value
of the left side of the gate. For example, if there’s a great deal of noise from the initial