Magnetrol 2xx Instrukcja Obsługi Pobierz pdf (Strona 20)

SAFETY INTEGRITY LEVELS 1 & 2

FLOAT FAILURE IDENTIFICATION

Jupiter

is the only magnetostrictive transmitter to achieve SIL 2 classiﬁcation as 1oo1 device per IEC 61508. The below table

offers the possibility to compare on a one-to-one basis, the SIL performance of Jupiter with other level transmitters.

oo1: One-out-of-one device means the suggested SIL class by the manufacturer is achieved by a single transmitter.

he use of 2 transmitters to achieve a higher SIL classiﬁcation is often stated as 1oo2 (one out of two) devices.

SFF: Safe Failure Fraction is the ratio between detected (safe and dangerous) and undetected (safe) instrument fail-

res versus total failures by the instrument. The % of this ratio is preferably as high as possible.

PFDavg: Average probability of failure on demand. This value is preferably as low as possible.

For more complete information, ask for the Jupiter FMEDA report by Exida.

The Jupiter

200 with SIL enhanced electronics is either using a probe with inactive zone or an extended MLI cage to identi-

fy a sinking or collapsed ﬂoat as a ﬂoat failure. Jupiter

200 with SIL enhanced electronics are equipped with one ﬂoat for

measuring either the top level or the interface level.

Standard electronics

SIL enhanced

electronics

SIL 1 as 1oo1 2 as 1oo1

Intrument Type B B

3,7 %

0,7 %

PFDavg 9,60E-04 5,45E-04

FITS Annual FITS Annual

Fail Dangerous

Undetected

218 1,91E-03 123 1,08E-03

Fail Dangerous

Detected

698 6,11E-03 793 6,95E-03

Safe 421 3,69E-03 413 3,62E-03

Ask for our SIL manual 41-299

Active span

4 - 20 mA

Active span

4 - 20 mA

Float failure zone

3,6 mA or 22 mA (selectable)

Inactive zone (3,6 or 22 mA selectable)

Direct insertion External mount

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 31 32

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Magnetrol 2xx Instrukcja Obsługi Strona 20