KROHNE OPTIWAVE 7300 IECEx - Manual (Page 9)

INSTALLATION
2
9
OPTIWAVE 7300 C
www.krohne.com 10/2010 - 4000176502 - AD IECEX OPTIWAVE7300 R02 en
Connection and operation of the purging connection are the responsibility of the user. The
operator is also responsible for selection of a suitable fluid to purge the device.
• If the screw is removed, make sure that the installation agrees with the Ex requirements for
the purging system.
2.2 Operating conditions
The allowable ambient temperature and corresponding flange temperature range for the device
depends on the Ex equipment category and temperature classes marked on the nameplate.
2.2.1 Ambient and flange temperature
The equipment protection level (EPL) and temperature class give the ambient temperature and
related flange temperature ranges for the device.
EPL Ga: Ex ia devices only - with the 4...20 mA output option
EPL Ga/Gb: Ex ia and Ex d[ia] devices - with the 4...20 mA output option
WARNING!
The gasket temperature must be in the approved limits. For more data, refer to "Pressure and
temperature ranges" in the Installation chapter of the handbook.
Temperature
class
Ambient temperature Flange temperature
[°C] [°F] [°C] [°F]
T6 -20…+57 -4…+122 -20…+60 -4…+140
Temperature
class
Ambient temperature Flange temperature
[°C] [°F] [°C] [°F]
T6 -40…+57 -40…+134 -20…+60 -4…+140
T5 -40…+72 -40…+161 -20…+60 -4…+140
T4 -40…+80 -40…+176 -20…+60 -4…+140