Operating; Starting Measurement - Siemens SITRANS LR500 Series Operating Instructions Manual

Operating

This chapter provides details on the general operation and functionality of the SITRANS LR500
series. For instructions on the use of the device local display HMI, refer to Local HMI (Page 65).
For a complete list of parameters, see Parameter assignment (Page 113) or Parameter
assignment (Page 113).
8.1

Starting measurement

After startup, the measurement view reports a list of measurement values in the order shown
below.
Process value
Level
Space
Distance
Volume*
Custom*
Loop current**
* "Volume" and "Custom" are not visible until configured.
** Measurements based on primary variable (PV) selection. Default PV is set to "Distance" at startup. (See
"Operation" in quick commissioning wizard, or parameter "PV selection" in menu "Setup > Select output" to
change this default.)
The following information will help you configure your device for optimal performance and
reliability.
Response Rate
The response rate of the device influences the measurement stability. Use the slowest rate
possible with the application requirements.
Dimensions
Dimensions of the vessel, wet well, or reservoir (other than lower and upper calibration
points) are only important if you require volume readings. In this case, all dimensions are
used to calculate the volume value in terms of level.
SITRANS LR500 series with mA/HART
Operating Instructions, 03/2024, A5E51099898-AA
Text as shown in measurement view of device
LEVEL
SPACE
DISTANCE
VOLUME
CUSTOM
LOOP CURRENT
8
85