2
INSTALLATION
10
DW 18 SERIES
www.krohne.com
11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
2.2 Operating conditions: ambient and process temperature
The allowable ambient temperature and corresponding flange temperature range for the device
depends on the equipment category, equipment protection level (EPL) and temperature classes
marked on the nameplate.
The equipment category, equipment protection level and temperature class give the ambient
temperature and related process temperature ranges for the device.
-40
°
C / -40
°
F is the minimum ambient temperature for all application options for use in
hazardous areas.
Equipment category 1 G or EPL Ga: Ex ia devices
Equipment category 1 D or EPL Da: Ex ia devices
Equipment category 1/2 G or EPL Gb: Ex d devices
Equipment category 1/2 D or EPL Db: Ex tb devices
Equipment category 1 G: Ex c devices
Equipment category 1 D: Ex c devices
Temperature class
Maximum ambient
temperature
Maximum process
temperature
[
°
C]
[
°
F]
[
°
C]
[
°
F]
T6
+40
+104
+60
+140
T5
+40
+104
+80
+176
T4
+60
+140
+120
+248
T3
+80
+176
+150
+302
Temperature class
Maximum ambient
temperature
Maximum process
temperature
[
°
C]
[
°
F]
[
°
C]
[
°
F]
T6
+50
+122
+60
+140
T5
+50
+122
+80
+176
T4
+60
+140
+120
+248
T3
+80
+176
+150
+302
Temperature class
Maximum ambient
temperature
Maximum process
temperature
[
°
C]
[
°
F]
[
°
C]
[
°
F]
T6
+40
+104
+60
+140
T5
+40
+104
+80
+176
T4
+60
+140
+120
+248
T3
+80
+176
+150
+302
