KROHNE OPTIFLUX 2000-4000-5000-6000-7300-IFC 300 Ex EN - Manual (Page 20)

2
TEMPERATURE LIMITS
20
OPTIFLUX
www.krohne.com 07/2010 - 7309482600 - AD EX IFC 300 R06 en
2.1.2 Field versions
• In general the OPTIFLUX 2000 F / 4000 F flow sensors are suitable for an ambient
temperature range of -40...+60°C.
• For dust hazardous areas the maximum surface temperature is equal to the process
temperature T
p
with a minimum of 85°C.
• The minimum process temperature is -40°C.
• The maximum process temperature Tp is dependent on the required temperature class
T6/T5...T3, the diameter and the maximum ambient temperature T
a
. The temperature range
is often limited further by the liner type used (refer to the Quick Start).
DN10...20 ("me")
DN25...150 ("d")
DN200...300 ("qe")
Temperature class Max. process temperature Tp [°C]
T
a
≤ 40°C 40 < T
a
≤ 50°C 50 < T
a
≤ 60°C
T6 75 70 70
T5 95 90 75
T4 130 115 75
T3 150 115 75
Temperature class Max. process temperature Tp [°C]
T
a
≤ 40°C 40 < T
a
≤ 50°C 50 < T
a
≤ 60°C
T6 70 70 70
T5 85 85 85
T4 120 120 120
T3 180 180 180
Use heat resistant
cables for T
p
above: 1
Not needed 155 105
1 Cables must withstand a continuous operating temperature of 85°C.
Temperature class Max. process temperature Tp [°C]
T
a
≤ 40°C 40 < T
a
≤ 50°C 50 < T
a
≤ 60°C
T6 75 70 70
T5 95 90 75
T4 130 115 75
T3 150 115 75