Version 2.6
Operating instructions
AFGUARD
®
Zone 0 and Zone 1
Page:
17
of:
41
FAUDI Aviation GmbH, Scharnhorststraße 7 B, D-35260 Stadtallendorf
BA_AFGUARD_Ex_rev2.6_Englisch_l
ogo
3.3.2 AFGUARD orientation in the pipe section
AFGUARD
®
is capable of detecting different droplet size distributions. Especially for bigger
droplets, AFGUARD
®
orientation in the pipe section is of major importance.
Therefore, we recommend installing the AFGUARD according the following image:
Orientation of AFGUARD
®
could be achieved using one of the supplied sealings. Start with
the 2 mm sealing to get an idea about the AFGUARD orientation (using the AFGUARD
®
spanner). If insufficient, replace with the 1.5 mm sealing.
3.3.3 Measuring system
➢
A complete measuring system comprises at least:
➢
The AFGUARD
®
sensor
➢
Sealing (select the 1,5 mm
or
the 2 mm seal which is provided together with the
AFGUARD)
➢
Two-wire cable connection with plug connector. Only the cable delivered together with
the AFGUARD
®
should be used.
➢
Isolating converter with transmitter supply.
E
3.3.3.1
Isolating converter with transmitter supply for signal output 4 to 20 mA (inherent safe)
Manufacturer
Type
Rating. EGB for Explosion group
„IIB“
Uo
Io
Po
Co
Lo
E
Hauser
RMA42
27,3 V
96,5 mA
659 mW
352 nF
100 mH
RN221N
(PTB 00 ATEX 2018)
27,3 V
87, 6 mA
597 mW
683 nF
18,9 mH
Phoenix
Contact
MACX MCR-EX-SL-RPSS-I
25,2 V
93 mA
587 mW
820 nF
4 mH
FAUDI Aviation highly recommends the use of isolating converters with transmitter supply.
Especially for use in hazardous areas, the use of inherent safe isolating converters is
mandatory. Protection class can be "ia" or "ib".
E
