2
INSTALLATION
16
OPTIWAVE X400
www.krohne.com
10/2017 - 4006413501 - AD NEPSI OPTIWAVE x400 R01 en
OPTIWAVE 7400
Temperature
class for
EPL Ga/Gb,
EPL Gb or EPL Gc
Maximum surface
temperature for
Zones 20/21,
Zone 21
or Zone 22
Maximum ambient temperature
Maximum process connection
temperature
(max. process temperature)
[
°
C]
[
°
F]
[
°
C]
[
°
F]
T6
T85
°
C
+60
+140
+60
+140
+54
+129
+85
+185
T5
T100
°
C
+75
+167
+75
+167
+69
+156
+100
+212
T4
T135
°
C
+72
+162
+115
+239
+68
+154
+135
+275
T3
1
T200
°
C
1
+64
+147
+150
+302
+58
+136
+180
+356
+54
129
+200
+392
1
Max. process connection temperature is +150
°
C / +302
°
F, if the device has a Metallic Horn, Drop or hygienic antenna with an EPDM
gasket or a PTFE Drop antenna
Temperature
class for
EPL Ga/Gb,
EPL Gb or EPL Gc
Maximum surface
temperature for
Zones 20/21,
Zone 21
or Zone 22
Minimum ambient temperature
Minimum process connection
temperature
(min. process temperature)
[
°
C]
[
°
F]
[
°
C]
[
°
F]
All classes
1
All surface
temperatures
1
-40
-40
-40
-40
-37
-35
-50
-58
1
Min. process connection temperature is -15
°
C / +5
°
F, if the device has a hygienic antenna with an FKM/FPM gasket. Min. process con-
nection temperature is -20
°
C / -4
°
F, if a Kalrez
®
6375 gasket is used. Min. process connection temperature is -30
°
C / -22
°
F, if a Metag-
las
®
feedthrough is used. Min. process connection temperature is -30
°
C / -22
°
F, if the device has a hygienic antenna with an EPDM
gasket. Min. process connection temperature is -40
°
C / -40
°
F, if the device has a Horn or Drop antenna with an FKM/FPM gasket.
INFORMATION!
These tables are applicable if the process connection has a distance piece and you replace an
OPTIWAVE 7300 signal converter with the OPTIWAVE 7400 signal converter. For more data about
the replacement of the signal converter, refer to OPTIWAVE 7300: Replacement of the signal
converter on page 28
.
These tables are also applicable if the process connection has a distance piece and you replace
an OPTIWAVE 6300 signal converter with the OPTIWAVE 6400 signal converter. For more data
about the replacement of the signal converter, refer to
OPTIWAVE 6300: Replacement of the
signal converter on page 27
.
