User's Manual

Parameter reference
SITRANS LR250 (FOUNDATION FIELDBUS)
142 Operating Instructions, 01/2014, A5E32221411-AB
Entering breakpoints via the hand-held programmer:
1. The default for level values is percent: if you want to select units instead, navigate to
Setup
(2.) > Sensor (2.3.) > Level Unit (2.3.2.)
, and select the desired unit.
2. Navigate to
Setup (2.) > Sensor (2.3.) > PV Units (volume/level) (2.3.3.)
, and select the
desired volume units.
3. Go to
XY index (2.4.1.5.)
and enter the number of the breakpoint you wish to adjust: for
example, for breakpoint
1
enter
1
.
4. Go to
X value (2.4.1.6.)
and enter the level value for the breakpoint just identified.
5. Go to
Y value (2.4.1.7.)
and enter the volume value for the breakpoint just identified.
6. Repeat steps 3 to 5 until values have been entered for all required breakpoints.
X value (2.4.1.6.)
See
XY Index (2.4.1.5.)
.
Y value (2.4.1.7.)
See
XY Index (2.4.1.5.)
.
Entering breakpoints via AMS:
See Linearization (LTB) (Page 82)
After completing the above steps you will need to configure AIFB 1 and/or AIFB 2. [See
AIFB 1
(2.6.)
and
AIFB 2 (2.7.)
for details.]
Signal Processing (2.5.)
In AMS Device Manager, see the General tab under Signal Processing (LTB) (Page 84).
Near Range (2.5.1.)
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 "Dead Zone".) The
factory setting is 50 mm (2") past the end of the antenna, and the range is dependent on the
antenna type and process connection. [See Threaded Horn Antenna with extension (Page 205)
and Flanged Horn (Page 210) for antenna heights to sensor reference point.]
Values
Range: 0 to 20 m (0 to 65.6 ft)
Default depends on antenna type and process connection.
Examples:
1.5" threaded horn
185.3 mm (7.3")
4" horn with stainless steel flange
and 100 mm (4") extension
373.3 mm (14.7")
Related parameters
Unit (2.2.1.)