Siemens SITRANS LVL200E Panduan Petunjuk Pengoperasian - Halaman 29
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Halaman Cetak
Sensor
current -
Sensor
4. Return
-
to current
operating
condition
4 Test key on the signal
conditioning instrument
SITRANS SCSC, SITRANS
TCSC
MAN-100411
Level relay
Signal lamp
A - overfill
A - Overfill
protection
protection
-
-
Test assessment (SPLC)
Test passed
Status
False signal
Uncovered
Covered
This test is valid if you cannot change the vessel filling or cannot
dismount the sensor.
With the SITRANS SCSC or SITRANS TCSC2 signal conditioning
instrument, the test result can be checked directly on an LED on the
signal conditioning instrument.
This is the most comfortable and simple way to carry out the test.
A test key is lowered in the front plate of the SITRANS SCSC and
SITRANS TCSC signal conditioning instruments. Push the test key for
> 2 seconds with a suitable object. Hence a test is started. The sensor
must neither be dismounted nor triggered by filling the vessel.
Make sure the connected downstream devices are activated during
the function test.
•
Failure LED lights red - test not passed- Please check the com-
plete measuring system.
•
Failure LED remains dark - test passed. The proof test is hence
finished.
SITRANS LVL200E - Operating Instructions
Level relay
Signal lamp
B - dry run
B - Dry run
protection
protection
-
-
Current value
Time
< 3.6 mA
0.6 s (±0.2 s)
8 mA (±1.5 mA)
1.5 s (±0.5 s)
16 mA (±1.5 mA)
1.5 s (±0.5 s)
Fail safe
Control
relay
lamp
-
29