Siemens SITRANS LUT400, Руководство по эксплуатации

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A5E33329501 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS Page 141
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2.2.2. High Calibration Point
Distance from sensor reference point
1
to High Calibration Point defined in Units
(2.1.1.).
When setting the High Calibration Point value, note that echoes are ignored
within
2.2.4.Near Range
.
2.2.3. Sensor Offset
The value altered when an Auto Sensor Offset (2.2.6.) is performed, defined in
Units (2.1.1.).
Alternatively, if amount of Sensor Offset is known, enter the constant that can
be added to or subtracted from sensor value
1
to compensate if the sensor
reference point has shifted.
2.2.4. Near Range
The range in front of the device (measured from the sensor reference point)
within which any echoes will be ignored. This is sometimes referred to as
blanking or a dead zone. Defined in Units (2.1.1.).
2.2.5. Far Range
Allows the material level to drop below Low Calibration Point without
generating a Loss of Echo (LOE) state. See Sensor Mode (2.1.2.) on page 138 for
an illustration. Defined in Units (2.1.1.).
Use this feature if the measured surface can drop below the Low Calibration
Point in normal operation.
Values
Range: 0.000 to 60.000
Default: 0.000
Values
Range: -99.999 to 99.999
Default: 0.000
1.
The value produced by the echo processing which represents the distance from sensor refer-
ence point to the target (see Sensor Mode on page 138 for illustration).
Values
Range: 0.000 to 60.000
Default: 0.300
Note: Far Range can extend beyond the bottom of the vessel.
Values
Range: Min. = Low Calibration Point
Max. = 61.000 M (200.13 FT)
Default: Value for Low Calibration Pt. + 1 m (3.281 ft.)