Operating Instructions

Sensor value is the value produced by the echo processing which represents the distance from
sensor reference point to the target. See Sensor Mode (2.2.2.) for an illustration.
Empty Rate per Minute (2.4.3.)
Defines the maximum rate at which the reported sensor value is allowed to increase. Adjusts
the SITRANS LR250 response to increases in the actual material level. Empty Rate is
automatically updated whenever Response Rate is altered .
Options Range: 0 to 99999 m / min.
Response Rate (2.4.1.) Empty Rate per Minute (2.4.3.)
* Slow 0.1 m/min (0.32 ft/min)
Medium 1.0 m/min (3.28 ft/min)
Fast 10.0 m/min (32.8 ft/min)
Altered by: Response Rate (2.4.1.)
Related parameters Units (2.2.1.)
Enter a value slightly greater than the vessel’s maximum emptying rate, in units per minute.
Sensor value is the value produced by the echo processing which represents the distance from
sensor reference point to the target. See Sensor Mode (2.2.2.) for an illustration.
Fail-safe (2.5.)
Note
Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated.
Material Level (2.5.1.)
Note
The default setting depends whether your device is a standard or NAMUR NE 43-compliant
device.
Defines the mA output to use when the Fail-safe timer expires.
STANDARD DEVICE
Options HI 20.5 mA (max. mA Limit)
LO 3.8 mA (min. mA Limit)
* HOLD Last valid reading (default 22.6 mA)
VALUE User-selected value [defined in Fail-Safe mA Value (2.5.3.)]
Parameter reference
SITRANS LR250 with mA/HART
112 Operating Instructions, 10/2019, A5E32220602-AG