User's Manual

Page 142 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE03
mmmmm
E: Application Examples
Appendix E: Application Examples
You can use these examples as setup references. Enter the values in the parameter tables to
select the corresponding functions.
Configure the basic settings using the Quick Start wizard parameters. (These parameters are
inter-related, and changes take effect only after you select YES to apply changes in the last
step.)
In each example, after performing a Quick Start, navigate to the other required parameters
either via the handheld programmer, or using a Device Management tool (SIMATIC PDM or
AMS Device Manager) and enter the appropriate values.
Liquid resin in storage vessel, level measurement
Return to Measurement: press Mode to start normal operation.
Note: In the applications illustrated below, values are for example purposes only.
Note: Minimum distance from flange face to target is limited by Near Range (2.8.1.).
Parameter
type
Parameter No. /Name
Options/
Values
Function
Quick Start
Wizard
parameters
Material (1.2.) LIQUID
Response Rate (1.3.) MED Medium =1 m/minute
Units (1.4.) M meters
Operation Mode (1.5.) LEVEL Level
Low Calibration Point (1.6.) 5 5 m (16.5 ft)
High Calibration Point (1.7.) 0.5 0.5 m (1.64 ft)
Apply? (Apply changes) (1.8.) YES
Transfers Quick Start
settings to device.
Independent
parameters
Timer (2.5.2.) 2 2 minutes
Material Level (2.5.1.) HI Fail-safe level set to High
To obtain level measurement/4 to 20 mA output
proportional to resin levels:
Low Calibration Pt. = 5 m (16.5 ft) from sensor
reference point
High Calibration Pt.= 0.5 m (1.64 ft) from sensor
reference point
Max.fill/empty rate = 0.2 m/min (0.65 ft/min)
In the event of a loss of echo:
SITRANS LR250 is to go into Fail-safe High after 2
minutes.
0.5 m
Low Cal
Point
5 m
100% Level
0% Level
High
Cal
Point
sensor
reference
point