KROHNE DK 46-47-48-800 ATEX II2G Ex i EN - Manual (Page 7)

DEVICE DESCRIPTION
2
7
DK46 - DK800
www.krohne.com 08/2012 - 4000430903 AD DK46/800 II2G R04 en
2.7 Ambient temperature / temperature classes
Because of the influence of the temperature of the product, no permanent temperature class is
assigned to variable area flowmeters. In fact, the temperature class of a device is a function of
the temperature of both the product and the environment. There is no distinction between
devices with one or two contacts. The classification is outlined in the following tables.
The tables take into account the following parameters:
• Ambient temperature T
amb.
• Product temperature T
m
• Installed equipment
• Supply type (maximum value for Pi)
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 installation and operating manual.
• 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.
AD_DK46_800_II2G_R04_en_430903_PRT.book Page 7 Tuesday, August 21, 2012 9:47 AM