KROHNE VARIFLUX IFM 6080 K-EEx-i-EEx EN - Manual (Page 8)

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 8
1.3 General information VARIFLUX IFM 6080 K / … EEx
The compact flowmeter complies with the European Directive 94/9/EC (ATEX 100a) and has been
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 (see
Sect. 1.5 for details).
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
Maximum process liquid temperature Temperature
class Maximum surface
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)
In case of the MODIS version IFM 6080 K / i-EEx, the electronic unit of type IFC 090 i-EEx is provided
with protective modules, which provide intrinsically safe output signals of category ”ia”. The flowmeter
is then marked with the code:
• 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.