Siemens LU01 Manuel D’Utilisation

7ML19985BE02

SITRANS LU01 – INSTRUCTION MANUAL

Page 25

For initial RUN mode entry (or after any programming alteration), do not use the SITRANS 
LU01 to operate process control equipment until satisfactory system programming and 
performance is verified.

1.

Press 

 

to enter the RUN mode. ---- may be displayed briefly while the SITRANS 

LU01 takes measurements and calculates the Reading. 
If an alarm symbol is displayed, the corresponding relay is de-energized. 

2.

Press 

 

to display Readings in 

%

 (percent of Span, P007) based upon Operation 

(P001). 

* Objects close to the transducer face (0%) are not detectable. 

3.

Press 

 

to observe the mA output value for the Point Number displayed (Auxiliary 

Reading). 

* Objects close to the transducer face (4 mA) are not detectable. 

4.

Press 

 

to observe the 

Failsafe Time Left

 (time left in percent before failsafe 

activation). 

Each time a valid measurement is made, this value (Auxiliary Reading) is reset to 100 and 
begins to fall toward 0 until the next valid measurement is made. 

If the Failsafe Time Left reaches 0, the SITRANS LU01 flashes LOE in the Reading display. 

All associated data is supplied to the Peripheral Communications terminals (27 and 28). 

Monitor system performance carefully, under all anticipated operating conditions. 

A.

If the SITRANS LU01 performs exactly as required, copy all Parameter Value 
alterations to the Programming Charts in the back of this instruction manual. 
(Altered Parameter Values may be scroll accessed). No further action is required. 
The SITRANS LU01 will continue performing reliably, with little or no maintenance. 

B.

If a measurement difficulty is encountered (the LOE display persists after start up), 
or performance does not meet installation requirements, proceed to the 
Troubleshooting Guide on page 99.

1

High Alarm

1

1

Low Alarm

2

Empty to Full =

0 to 100%

100 to 0%

Empty to Full =

4-20 mA

20-4 mA