KROHNE OPTIFLUX 2000-4000 IECEx EN - Manual (Page 9)

TEMPERATURE LIMITS
2
9
OPTIFLUX
www.krohne.com 06/2010 - 7312092100 - AD OPTIFLUX IECEx R01 en
The temperature limits apply under the following conditions:
• The instrument is installed and operated in accordance with the installation directions given
in the installation and operating instructions.
• The instrument is not heated up by any additional heat radiation (direct solar radiation, heat
from adjacent plant parts) so causing it to operate above the permissible ambient
temperature range.
• Insulation is not hindering free ventilation of the signal converter housing.
2.1 OPTIFLUX 2000 / 4000
2.1.1 Compact versions
• The OPTIFLUX 2100 C / 4100 C is suitable for an ambient temperature of -20...+40°C.
• For dust hazardous areas, the maximum surface temperature is 120°C.
• The minimum process temperature for all DN sizes is -20°C.
• The maximum process temperature is determined by the temperature class T4 of the gas
hazardous area of concern and type of protection of the coil housing.
• The process temperature range is often limited further by the liner type used (refer to the
Quick Start).
DN10...20 ("mb"), DN25...150 ("d"), DN200...300 ("e") and DN350...3000 ("e")
Temperature class Max. process temperature Tp [°C]
T
a
≤ 40°C
T4 120