Siemens Sitrans PROBE LU Instruction Manual page 97

2.7.4.2. Sampling down
Once echo is outside the window, a specified number of consecutive
echoes must appear below the echo locked onto, before measurement is
accepted as valid.
2.7.4.3. Window
A "distance window" centered on the echo, used to derive the reading.
When a new measurement is in the window, the window is re-centered
and the reading is calculated (see Display before Auto False Echo
Suppression on page 94 for an illustration).
When the value is 0, the window is automatically calculated after each
measurement.
• For slower Measurement Response values, the window is narrow.
• For faster Measurement Response values, the window becomes
2.7.4.4. Window Used
The actual size of the window (whereas Window refers to the designed
size of the window.
2.7.5. Range
2.7.5.1. Near Range (LOW RANGE): (default value 0.25 m)
Minimum distance from the reference point
should be considered valid. (This is sometimes referred to as Blanking.
2.7.5.2. Far Range (HI RANGE): (default 6 m or 12 m, depending on unit)
Maximum distance from the reference point
should be considered valid.
1.
This parameter is for use only by Siemens service technicians.
2.
The transducer face.
7ML19985JB02 SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL
1
(default 2)
1
(default 0)
progressively wider.
The echo lock window is stored as standard sample, but
Note:
displayed in the engineering units selected to display level. Any value
entered for the echo lock window will be rounded to the nearest
sample.
1
Hand programmer values
Far Range can extend beyond the bottom of the tank.
Note:
Hand programmer values
2
beyond which an echo
Range: 0 to 20 m
2
, within which an echo
Range: 0 to 20 m
)
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