Instruction Manual

2 DEVICE DESCRIPTION
6
DK32 DK34
www.krohne.com 11/2012 - 4000422303 AD DK32/34 II2G R03 en
2.7 Ambient temperature / temperature classes
Due to the influence of the product temperature, variable area flowmeters with built-in electrical
equipment (electric variants) are not assigned to any fixed temperature class. The temperature
class of these devices is rather a function of the product temperature and ambient temperature
that is present and the specific device version. Please see the following tables for the
assignments.
The tables take into account the following parameters:
• Ambient temperature T
amb.
• Product temperature T
m
DK3./../.././../A–Ex permissible medium and ambient temperatures
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.
Temperature
class
Ambient
temperature
Maximum permissible medium temperature
with connector (S) or cable gland (L)
Type DK32 Type DK34
[°C] [°F] [°C] [°F] [° C] [°F]
T6 -20...+40 -4...+104 75 167 80 176
-20...+50 -4...+122 70 158 70 158
-20...+60 -4...+140 60 140 60 140
T5 -20...+40 -4...+104 100 212 100 212
-20...+50 -4...+122 95 203 100 212
-20...+60 -4...+140 85 185 90 194
T4 -20...+40 -4...+104 135 275 135 275
-20...+50 -4...+122 130 266 135 275
-20...+60 -4...+140 120 248 130 266
-20...+90 -4...+194 90 194 90 194
T3...T1 -20...+40 -4...+104 135 275 150 302
-20...+50 -4...+122 130 266 140 284
-20...+60 -4...+140 120 248 130 266
-20...+90 -4...+194 90 194 90 194
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