GE DMS Go+ - Setting the Gates; Task of the Gates; Gate Start

Setting the gates 5 Operation
DMS Go+ Edition 4 (05/2014) 5-37
5.9 Setting the gates
Task of the gates
The gates are used for selecting the measuring point for
the digital time-of-flight or amplitude measurement to
determine the wall thickness.
The DMS Go+ makes the two gates A and B available.
The gate B is only required in multi-echo sequence
measurements and is used for measuring the distance
from the material surface up to the first echo (wall thick
-
ness measurement) or between two backwall echoes
(measurement on coated test objects).
The position of the gates is defined by three parameters:
start, width, and threshold height.
The start of gate B is coupled to the first echo in gate A.
If you shift the starting point of gate A, the starting point
of gate B is automatically shifted by the same value. If
there is no echo, the starting point of gate A applies.
Note
The functions of the gates are only effective
within the display range. The gate
B is only
visible and adjustable if one of the measure
-
ment modes DUAL-MULTI, S-FLANK, or
S-PEAK is selected (see Section Choosing
the measurement mode, page 5-22).
Gate start
You can set the starting points for gate A and gate B.
– In the function group GATE, select the function
GATE A START.
– Set the required starting point for gate A.
– If the selected measurement mode allows it, select
the function GATE B START and set the required
starting point for gate
B.