Siemens SITRANS LUT400 Operating Instructions Manual page 68

Initial device setup
Quick Start Parameter
Transducer
Temperature Source
Primary Measuring Device
(PMD)
Flow Exponent
Units
Low Calibration Point
High Calibration Point
Response Rate
Method of Flow Calculation
Maximum Head
Flowrate Units
Maximum Flow at 20 mA
Flowrate Decimal
Low Flow Cutoff
Fail-safe Alarm setup
Parameter
Enable (2.8.8.1.)
Assigned Relay (2.8.8.2.)
Page 60 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
Setting/
Description
Value
For best accuracy, an XRS-5 transducer should
XRS-5 be used in conjunction with the High Accuracy
SITRANS LUT440.
For best accuracy, a TS-3 external temperature
TS-3
sensor is required.
Exponential Parshall Flumes are a type of exponential device.
1.522 Available from the PMD supplier data sheet.
m Units corresponding to the head measurement.
The distance to the empty point or bottom of the
1.6
flume. This sets the 4 mA setpoint.
The distance to the Max. Head. This sets the 20
1.0
mA setpoint.
Response rate is set to be faster than the fastest
Medium rise in material level under typical operating con-
(1.0 m/min) ditions. In this example, the rate is faster than the
Peak Time rate provided by the end user.
Used when the Max. Head and Max. Flow values
Ratiometric
are provided.
0.6 m Available from the PMD supplier data sheet.
Cum/hr Set per end user requirements.
1143 Available from the PMD supplier data sheet.
For the purpose of this example, decimals are
No Digits
not required.
This parameter stops the LUT440 from totalizing
if the head value corresponding to low flow is
reached. This prevents flow from being totalized
0.00
when the head level reaches the ineffective point
of the PMD. Refer to the PMD data sheets for
ratings.
Continue with alarm setup below.
Setting/
Description
Value
By selecting Enabled, the fail-safe alarm is now
Enabled
activated.
Select relay to be used for fail-safe alarm.
Relay 1 Relay 1 is the dedicated alarm relay for the
LUT400.
Continue with sampler setup on next page.
7ML1998MV01