KROHNE ALTOFLUX IFM x080 K ATEX EN User Manual
Page 8
ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx
8
1.3
VARIFLUX IFM 6080 K … EEx
The Variflux IFM 6080 K/…-EEx magnetic-inductive compact flowmeter is in accordance with the
European Directive 94/9/EC (ATEX 100a) and approved for hazardous classified locations of
Zone 1 and 2 under EC-type Examination Certificate number:
KEMA 02 ATEX 2021 X
The compact flowmeter is available in two types, namely:
• IFM 6080 K-EEx regular explosion protected version
• IFM 6080 K/i-EEx, MODIS version. This type has intrinsical safe signal output circuits, which
are provided by two on the IFC 090i-EEx electronics unit installed MODIS modules.
The regular IFM 6080 K-EEx compact flowmeter is designed for ambient temperatures (T
a
) in the
range of -40°C up to +60°C, the so-called MODIS version IFM 6080 K/i-EEx is rated for ambient
temperatures from -20°C up to +60°C. The allowed process liquid temperature is limited by the
occuring surface temperature of system components in the combustible atmosphere that
(possibly) surrounds the apparatus, determined by the temperature class of the atmosphere,
see table.
Temperature classification
Temperature
Maximum surface
Maximum process liquid temperature
class
Temperature
T
a
≤ 50°C
T
a
≤ 60°C
T6
T80°C
70°C
70°C
T5
T95°C
85°C
85°C
T4
T130°C
120°C
100°C
T3
T190°C
180°C
100°C
The regular IFM 6080 K-EEx compact flowmeter consists of the IFC 090-EEx signal converter,
which is screwed on top of the IFS 6000-EEx primary head (i.e. measuring unit). The compact
flowmeter is marked with the following code below, depending on the meter size:
• DN2.5-15:
II 2GD EEx dme [ib] IIC T6…T3
• DN25-80:
II 2GD EEx d [ib] IIC T6…T3 ("EEx d" terminal compartment) or
II 2GD EEx de [ib] IIC T6…T3 ("EEx e" terminal compartment)
• DN2.5-15:
II 2GD EEx dme [ib] [ia] IIC T6…T3
• DN25-80:
II 2GD EEx d [ib] [ia] IIC T6…T3 ("EEx d" terminal compartment) or
II 2GD EEx de [ib] [ia] IIC T6…T3 ("EEx e" terminal compartment)
All meters are also marked with the maximum surface temperature T80…T190°C because of the
dust classification. See for details the EC-type examination certificate in Sect. 8.3 of these
additional instructions.
Primary head
The IFS 6000-EEx primary head of the IFM 6080 K/…-EEx compact flowmeter contains two field
coils and two electrodes in type of protection intrinsic safety category "ib" according to EN 50020.
The type of protection of the field coils depends on meter size.