Siemens SITRANS LUT400, Руководство по эксплуатации

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Page 144 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS A5E33329501
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2.4.2. LOE Timer
Sets the time to elapse since the last valid reading, before the Fail-safe Material
Level is reported (defined in seconds).
2.4.3. Fail-Safe mA Value
Allows the user to define the mA value to be reported when the Fail-safe timer
expires.
2.5. Current Output
2.5.1. Current Output Function
Menu number
2.5.1.
visible on LUT420 (Level model).
OR
2.5.2. Current Output Function
Menu number
2.5.2.
visible on LUT430 (Pump and Flow model), and LUT440
(OCM model).
Alters the mA output/measurement relationship.
Values
Range: 0 to 7200
Default: 100
Note: Material Level (2.4.1.) must be set to Value for the Material Level value
to be reported.
Values
Range 3.50 to 22.80 mA
Default 3.58
Note: Default settings in the parameter tables are indicated with an asterisk (*)
unless explicitly stated.
Notes:
• The various options have different reference points.
• Use caution when changing Current Output Function while the device is
connected to a HART network. Current Output Function controls the
primary value and the loop current for the device.
Options Reference point Description
MANUAL
a
n/a
user can enter mA value for loop cur-
rent.
* LEVEL Low Calibration Point
measured as difference between the
material level and
2.2.1.Low Calibration
Point
, defined in
2.1.1.Units
SPACE High Calibration Point
measured as difference between the
material level and
2.2.2.High Calibration
Point
, defined in
2.1.1.Units
DISTANCE Sensor reference point
measured as difference between the
material level and sensor reference
point, defined in
2.1.1.Units