Device description, 7 ambient temperature / temperature classes – KROHNE DK 32-DK 34 ATEX II3G Ex nA-ic EN User Manual
Page 7
DEVICE DESCRIPTION
2
7
DK32 DK34
www.krohne.com
03/2013 - 4002148602 AD DK32/34 II3G R03 en
2.7 Ambient temperature / temperature classes
Because of the influence of the temperature of the product, no fixed 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
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.
Temperatur
e class
Ambient
temperature
Maximum permitted product temperature
with plug (P) or cable entry (C)
Type DK32
Type DK34
[°C]
[°F]
[°C]
[°F]
[°C]
[°F]
T6
-25...+40
-13...+104
75
167
80
176
-25...+50
-13...+122
70
158
70
158
-25...+60
-13...+140
60
140
60
140
T5
-25...+40
-13...+104
100
212
100
212
-25...+50
-13...+122
95
203
100
212
-25...+60
-13...+140
85
185
90
194
T4
-25...+40
-13...+104
135
275
135
275
-25...+50
-13...+122
130
266
135
275
-25...+60
-13...+140
120
248
130
266
-25...+90
-13...+194
90
194
90
194
T3...T1
-25...+40
-13...+104
135
275
150
302
-25...+50
-13...+122
130
266
140
284
-25...+60
-13...+140
120
248
130
266
-25...+90
-13...+194
90
194
90
194
AD_DK32_34_II3G_R03_en_4002148602_PRT.book Page 7 Thursday, March 7, 2013 6:42 AM