General Operation; Starting Measurement; Measurement Conditions; Response Rate - Siemens SITRANS LUT400 Operating Instructions Manual

General Operation

This chapter provides details on the general operation and functionality of the SITRANS
LUT400. For instructions on the use of the device LCD and local push buttons, refer to
Display
on page 34.

Starting measurement

The SITRANS LUT400 is a single point device. The device starts in LEVEL mode with a
preset of no transducer and a low calibration point of 60 meters. Change the following
common parameters to reflect your application.
2.1.2. Sensor Mode

Response Rate

QS Level
(set via
2.1.6. Transducer
2.2.1. Low Calibration Point
2.2.2. High Calibration Point

Measurement conditions

The following information will help you configure your SITRANS LUT400 for optimal
performance and reliability.
Response Rate
The response rate of the device influences the measurement reliability. Use the slowest
rate possible with the application requirements.
Note: Changes to fill and empty rate parameters can override Response Rate
setting. See "Response Rate" on page 42.

Dimensions

Dimensions of the vessel, wet well, or reservoir (other than low and high 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. They are also used to calculate
pumped volume.

Fail-safe

The fail-safe parameters ensure that the devices controlled by the SITRANS LUT400
default to an appropriate state when a valid level reading is not available. (See list of
faults that result in fail-safe in
A5E33329501
Parameter
on page 39)
2.1. 1 . Units
General Fault Codes
SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
Sample Value
LEVEL
MEDIUM
XPS-15
M
12
2
on page 233.)
The LCD
Page 63