Siemens LU01 ユーザーズマニュアル

7ML19985BE02

SITRANS LU01 – INSTRUCTION MANUAL

Page 81

Press ENTER 

 to put the CPU into an infinite loop to test the watchdog timer. 

On successful completion (10 seconds) the RUN mode is entered and the SITRANS LU01 
is reset. Programming is kept and the unit responds as if there had been a power failure.

Press ENTER 

 to activate the display test.

All LCD segments and symbols are temporarily displayed.

Press ENTER 

 , then press each keypad key in the following sequence:

As each key is pressed, the associated keypad number is displayed. On successful test 
completion, PASS is displayed. FAIL is displayed if a key is pressed out of sequence or the 
programmer keypad malfunctions.

Used to monitor the transmit pulse with an oscilloscope connected to the transducer 

terminals.

Press ENTER 

 to supply repeated transmit pulses, at the frequency entered, to the 

transducer and / or view the transducer operating frequency (automatically altered by 
P004 Transducer) for the Point Number displayed. 

Press ENTER

 

 to test the SITRANS LU01 communications circuitry.

On successful completion, PASS is displayed. Otherwise FAIL is displayed. If FAIL is 
displayed, repeate the test (the first test performed sets up the auto polarity function).

Range: 10 to 60 kHz

•

P004 Transducer

 Before activating this feature, connect terminal block contacts 27 to 29 

and 28 to 30.