Fm Approved/Csa Certified Flowmeters; Introduction; Specific Requirements; Supply - ABB MagMaster User Manual

2 FM APPROVED/CSA CERTIFIED FLOWMETERS

2.1 Introduction

The range of hazardous
MagMaster Flowmeters are listed in Table 2.1 and
2.2.
Identification and use is shown on certification
labels – on the side of the terminal box on remote
sensors and a corresponding label on the remote
transmitter, or, a label on the transmitter only in the
case of an integral transmitter and sensor.
Three versions are offered:
a) A remote version consisting of a sensor and
transmitter bearing both CSA and FM
markings; a major achievement in Hazardous
Area approvals.
employs a multiple zener barrier assembly, the
operation of which is transparent in normal
use. The barrier is an internal part of the
sensor which simplifies installation. The cable
entering the Hazardous area is no different to
that supplied on the standard product and has
no special segregation requirements or any
external zener barriers to install, but still offers
full Intrinsic Safety inside the pipe section. This
version is also certified for use in many other
countries worldwide.
b) A remote version with CSA markings but with
lower installed cost. This offers non-incendive
protection inside the pipe section.
c) An integral version with CSA markings with still
lower installed cost. This offers non-incendive
protection inside the pipe.
These three versions are depicted in Table 2.1,
with a descriptive title and a designation of duty or
location.

2.2 Specific Requirements

2.2.1 Supply

Supply to the transmitter must be single phase
supply rated at no more than 240 volts. This
supply must be fitted with a means of
disconnection and be fused with a fuse suitable for
the cable employed but not exceeding 35 Amps

2.2.2 Wiring

The safety of the system depends on making
reliable connections,
connections are checked for being neither loose
nor too tight.
area approved
This innovative design
and ensuring
...2.2.2 Wiring
Sensor wiring
The cable between the remote Sensor and the
Transmitter must only be that supplied for the
purpose by ABB. Other types of cable may not be
substituted, even for part runs. Where joints
between cables have to be made (e.g. for repairs,
or for junctions in panels etc.) use only the ABB
junction box (see Accessories and Spares
section). The junction box must be approved for
the relevant duty.
Caution.
The DIV 2 Hazardous (Intrinsically safe
electrodes) version has a different sensor
terminal connection block to all the other
variants. (The terminal box is also larger).
For this version only, the bared cable ends
must be 10mm (0.4") long, and not 5mm
as for all other versions.
Transmitter wiring
The transmitter is not designed to accept rigid
conduit direct entry. If rigid conduit is employed,
the last few feet must be run in flexible conduit and
the transmitter be fitted with face sealing adaptors
of the type specified in this manual. Alternatively,
armoured or standard cable may be used with the
face sealing cable glands as specified in this
manual.
Only the 0.5" NPT glands and adaptors specified
in the manual may be used.

2.2.3 Environmental Considerations

The required NEMA Enclosure Rating must be
maintained.

2.2.4 Potting

It is not necessary to pot the remote terminal box
unless environmental conditions demand it.
It may be necessary to seal the conduit entry to
prevent moisture entering the terminal box via the
conduit.
that
Conduit entries must be sealed if the terminal box
is to be potted.
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