KROHNE OPTISWIRL 4070 ATEX II2G EN - Manual (Page 7)

DEVICE DESCRIPTION
2
7
OPTISWIRL 4070
www.krohne.com 04/2013 - 4000077105 MA OPTISWIRL4070 II2G AD R05 en
2.6 Types of protection
The marking on the compact device as per ATEX is: II 2G Ex d ia [ia] IIC T6 Gb II 2G Ex d ia [ia] IIC T6 Gb II 2G Ex d ia [ia] IIC T6 Gb II 2G Ex d ia [ia] IIC T6 Gb
The marking on the remote converter as per ATEX is: II 2G Ex d ia [ia] IIC T6 Gb II 2G Ex d ia [ia] IIC T6 Gb II 2G Ex d ia [ia] IIC T6 Gb II 2G Ex d ia [ia] IIC T6 Gb
The marking on the remote sensor as per ATEX is: II 2G Ex ia IIC T6 Gb II 2G Ex ia IIC T6 Gb II 2G Ex ia IIC T6 Gb II 2G Ex ia IIC T6 Gb
The marking on the compact device as per IECEx is: Ex d ia [ia] IIC T6 Gb Ex d ia [ia] IIC T6 Gb Ex d ia [ia] IIC T6 Gb Ex d ia [ia] IIC T6 Gb
The marking on the remote converter as per IECEx is: Ex d ia [ia] IIC T6 Gb Ex d ia [ia] IIC T6 Gb Ex d ia [ia] IIC T6 Gb Ex d ia [ia] IIC T6 Gb
The marking on the remote sensor as per IECEx is: Ex ia IIC T6 Gb Ex ia IIC T6 Gb Ex ia IIC T6 Gb Ex ia IIC T6 Gb
The following types of protection are used:
• Electronics compartment - type of protection flameproof enclosure "d"
• Terminal compartment - type of protection intrinsic safety "i"
• Input/output circuits in type of protection intrinsic safety, level of protection "ia" operation on
intrinsically safe circuits level of protection "ib" permitted.
• Sensor circuits remote version (compact device only internally) in type of protection intrinsic
safety, level of protection "ia"
2.7 Ambient temperature / temperature classes
The permissible range of ambient temperatures for vortex flowmeters is noted on the nameplate
and is
T
amb
= -40°C...+60°C / -40°F...+140°F and
T
amb
= -25°C...+60°C / -13°F...+140°F (until year of manufacture 2008).
Because of the influence of the temperature of the product, no fixed temperature class is
assigned to vortex flowmeters. In fact, the temperature class of a device is a function of the
temperature of both the product and the environment, as well as the size of the measuring units.
The classification for the respective version is outlined in the following tables.
Regardless of the temperature class, the lower limit value for the product temperature is T
M
= -
40°C / -40°F for all versions.
INFORMATION!
The maximum permissible product temperatures listed in the tables are valid under the
following conditions:
•
The measuring device is installed and operated in accordance with the installation
instructions in the standard documentation.
• It must be ensured that the flowmeter is not heated by the effects of additional heat radiation
(sunshine, neighbouring system components) and thus operated above the permissible
ambient temperature range.
• Insulation must be limited to the piping.
Unobstructed ventilation of the indicator part must be ensured.
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