Siemens SITRANS LVL200E - Proof Test (WHG, SIL); WHG Approval Requirements; SIL Qualification and Approval; Function Test Implementation Methods

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MAN-100411
SITRANS LVL200E - Operating Instructions
55328-EN-170712
Sensor Signal conditioning in-
strument
Mode on
the signal
condi-
tioning
instrument
Level Signal
current -
Sensor
Signal
lamp -
sensor
Analogue
- input
control
Signal
lamp -
signal
condi-
tioning
instrument
Mode B
Dry run
protection
approx.
8 mA
Green
> 3.8 mA
< 11.5 mA
Fault mes-
sage
(mode A/B)
any approx.
1.8 mA
O
≤3.6mA
≥21mA
6.4 Proof test (WHG, SIL)
The implementation of the proof test according to WHG is stipulated
in the general type approval, item 8.
Take note of these higher-ranking approvals if SITRANS LVL200E Ex
isusedaspartofanoverllprotectionsystemaccordingtoWHG.
The following instrument combinations meet the requirements ac-
cording to WHG:
SITRANS LVL200E Ex with
•
Oscillator SWE60Z EX
•
Signal conditioning instrument SITRANS SCSC, SITRANS TCSC
or SPLC (safety-oriented PLC)
TheSITRANSLVL200Eisqualiedforuseinmeasuringchainsof
level SIL2 according to IEC 61508 (redundant, level SIL3) and is ap-
proved according to WHG.
The measuring system can be used for level detection of liquids and
meets the special requirements of safety technology.
This is possible up to SIL2 in a single channel architecture (1oo1D),
and up to SIL3 in a multiple channel, redundant architecture.
The following instrument combinations meet the requirements ac-
cording to SIL:
SITRANS LVL200E Ex with
•
Oscillator SWE60Z EX
•
SITRANS SCSC, SITRANS TCSC signal conditioning instrument
The following options are available for carrying out the proof test:
WRA
SIL
Implementation - Func-
tion test