Setup Process - Siemens SITRANS LG250 Operating Instructions Manual
Guided wave radar
4...20 ma/hart - two-wire
rod and cable probe
with sil qualification
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Also See for SITRANS LG250:
- Operating instructions manual (92 pages) ,
- Operating instructions manual (76 pages) ,
- Operating instructions manual (84 pages)
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Change parameters
Verify parameters/Lock
adjustment
Incomplete process
Instrument reset
Start: Safe operating
state
Unlock adjustment
Change parameters
Setup - Function test
30
All parameters changed by the operator are automatically stored
temporarily so that they can be verified in the next step.
After setup, the modified parameters must be verified (confirm the
correctness of the parameters). To do this, you first have to enter the
PIN. Here the adjustment is locked automatically. Then you carry
out a comparison of two character strings. You must confirm that the
character strings are identical. This is used to check the character
presentation.
Then you confirm that the serial number of your instrument has been
carried over correctly. This is used to check device communication.
Then, all modified parameters that have to be confirmed are listed.
After this process is terminated, the safety function is again ensured.
Warning:
If the described process was not carried out completely or correctly
(e.g. due to interruption or voltage loss), the instrument remains in an
unlocked, and thus unsafe, status.
Warning:
In case of a reset to basic settings, all safety-relevant parameters will
also be reset to default. Therefore all safety-relevant parameters must
be checked or readjusted.
6.5
Setup process
Operating sequence
A parameter change with SIL qualified instruments must always be
carried out as follows.
•
Unlock adjustment
•
Change parameters
•
Lock adjustment and verify modified parameters
The setup must be carried out according to an exactly specified pat-
tern.
Generally the instrument is in safe operating state before the adjust-
ment is released.
Each parameter change requires the release of the instrument
through a PIN (see chapter "Setup steps - Lock adjustment").
In delivery status, the PIN is 0000.
Set up the SITRANS LG250 according to the specification in this
operating instructions and the Safety Manual.
When locking the adjustment, the instrument checks the data of the
measurement loop and decides on the basis of the evaluation results
if a function test is required.
SITRANS LG250 - Operating Instructions
PBD-51041388
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