Proof Test (Whg, Sil) - Siemens SITRANS LVL200E Operating Instructions Manual

WRA
SIL
Implementation - Func-
tion test
24
Mode on Level
the signal
condi-
tioning
instrument
Mode B
Dry run
protection
Fault mes- any
sage
(mode A/B)
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 overfill 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 qualified 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:
SITRANS LVL200E - Operating Instructions
Sensor
Signal Signal
current - lamp -
Sensor sensor
approx.
8 mA
Green
approx.
1.8 mA
Off
Signal conditioning in-
strument
Analogue Signal
- input lamp -
control signal
condi-
tioning
instrument
> 3.8 mA
< 11.5 mA
≤ 3.6 mA
≥ 21 mA
MAN-100411