KROHNE ALTOFLUX IFM4042K EEx EN - Manual (Page 3)

2
1. SYSTEM COMPONENTS
1.1 General information
The Altoflux 2W IFM 4042 K-EEx electromagnetic compact flowmeter in 2-wire technology is
in accordance with European Directive 94/9 EG (ATEX 100a) and approved for hazardous
classified locations of Zone 1 and 2 by the KEMA conform to the European Standards of the
EN 500xx series. The IFM 4042 K-EEx has the following approval number.
KEMA 01 ATEX 2200 X
The IFM 4042 K-EEx compact flowmeter is designed for ambient temperatures in the range
of -40°C up to +60°C.
The allowed process liquid temperature is a.o. limited by the combustible atmosphere that
(possibly) surrounds the apparatus, which again is determined by the temperature class of
the atmosphere (first column of the tables). See table 1 and 2 below for details.
For dusts the second column of the two below listed tables is applicable.
Maximum process liquid temperature Temperature
class
(for gases)
Max. surface
temperature
(for dusts)
T
a
≤
40°C T
a
≤
50°C T
a
≤
60°C
T6 T85°C 75°C 70°C 70°C
T5 T100°C 95°C 90°C 75°C
T4 T135°C 130°C 115°C 75°C
T3 T180°C 150°C 115°C 75°C
Table 1: Temperature classification DN10…20 and DN200 and larger.
Maximum process liquid temperature Temperature
class
(for gases)
Max. surface
temperature
(for dusts)
T
a
≤
40°C T
a
≤
50°C T
a
≤
60°C
T6 T85°C 70°C 70°C 70°C
T5 T100°C 85°C 85°C 85°C
T4 T135°C 120°C 120°C 115°C
T3 T180°C 180°C 180°C 115°C
Use heat-resistant cables above - - 50°C
Table 2: Temperature classification DN25…150 with PFA liner.
The IFM 4042 K-EEx flowmeter consists of the IFC 040-EEx signal converter unit, which is
screwed on top of the primary head (i.e. the measuring unit). The compact flowmeter is
marked with one of the codes below, depending on the meter size:
•
DN10-20: II 2GD EEx dme [ib] IIC T6…T3.
•
DN25-150: II 2GD EEx de [ib] IIC T6…T3 ("EEx e" or "EEx d" terminal compartment).
•
DN200 and up: II 2GD EEx de [ib] IIC T6…T3.
For details see the EC-type examination certificate in Section 10 of these instructions.
1.2 Primary head
The primary head is the measuring unit of the IFM 4042 K-EEx compact flowmeter and
contains two field coils (see table 3 on the next page for the type of protection) and two
electrodes in type of protection intrinsic safety category "ib" according to EN 50020.