Analog Output Scaling - Siemens Sitrans LR200 Instruction Manual

2.6. Analog Output Scaling

2.6.1. Current Output Function
Notes:
• Level, space, and distance, have different reference points.
• Sensor Mode resets Current Output Function to the same setting.To select
a different option, do so after Sensor Mode has been set.
• Use caution when changing Current Output Function while the device is
connected to a HART network. Current Output Function controls the pri-
mary value and the loop current for the device.
• Current Output Function also affects the secondary, tertiary and quater-
nary variables in a HART network.
Allows
Mode. For example, Sensor Mode may be set to Level and
Function (2.6.1.)
Level
Sensor
ref.
pt.
High
Cal.
Pt.
Low
Cal.
Pt.
Options
* Level
Space
Distance
Volume
Manual
(LUI only)
a)
Current Output Function must be set to Manual before modifying mA Output Value
(2.6.6.). Remember to restore the previous Current Output Function setting after
modifying mA Output Value.
To modify Current Output Function via SIMATIC PDM:
• Open the menu Device – Select Analog Output. (See
on page 51 for more detail.)
Page 80 SITRANS LR200 (HART) – INSTRUCTION MANUAL
Current Output Function (2.6.1.)
set to Distance.
Space
20 mA
100%
Level
4 mA
0%
Reference point
Low Calibration Point
High Calibration Point
sensor reference point
converts a level measurement to a volume output
a)
allows mA Output Value (2.6.6.) to be set to a user-defined value
to be set independently from Sensor
Distance
4 mA
Space
0%
20 mA
100%
Description
measured as a percentage of the
difference between High Calibration Point
and Low Calibration Point
measured as a percentage of Low
Calibration Point
Current Output
4 mA
0%
Distance
20 mA
100%
Select Analog Output
7ML19985JP02