User's Manual

7ML19985JM01 SITRANS LR 460 – INSTRUCTION MANUAL Page 66
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Parameters
2.5.3. Echo Sampling
2.5.3.1. Sampling up
1
Once echo is outside the window, a specified number of consecutive
echoes must appear above the echo locked onto, before measurement is
accepted as valid.
2.5.3.2. Sampling down
1
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.
2.5.3.3. Window
1
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, page 69 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
progressively wider.
2.5.3.4. Window Used
1
2.5.4. Range
2.5.4.1. Near Range (LOW RANGE)
The range in front of the device (measured from the reference point
2
)
within which any echoes will be ignored. (This is sometimes referred to as
"Blanking" or "Dead Zone".)
1.
This parameter is for use only by Siemens Milltronics service technicians.
Note: The echo lock window is stored as standard sample, but
displayed in the engineering units selected to display level. Any value
entered for the echo lock window will be rounded to the nearest
sample.
2.
For the standard configuration reference point, see SITRANS LR 460 Dimensions on
page 10.
Values
Range: 0 to 20 m
Default: 0.4 m