KROHNE OPTIFLUX 2000-4000-5000-6000 -IFC 100 Ex EN - Manual (Page 14)

2
TEMPERATURE LIMITS
14
OPTIFLUX
www.krohne.com 04/2009 - 7.30685.22.00 - EX IFC 100 en
2.2 OPTIFLUX 5000
The maximum process temperature T
p
is dependent on the required temperature class T6...T3
and the maximum ambient temperature T
a
.
2.2.1 Field versions
Sandwich versions
• The flow sensor is suitable for an ambient temperature range of -20...65°C (DN2.5...15) or -
40...+65°C (DN25...100).
• The minimum process temperature is -20°C (DN2.5...15) or -40°C (DN25...100).
Flange versions
• The flow sensor is suitable for an ambient temperature range of -40...65°C (DN15...100).
• The minimum process temperature is -40°C.
Temperature class
(for gasses)
Maximum surface
temperature for
dust [°C]
Max. process temperature Tp [°C]
T
a
≤ 40°C 40 < T
a
≤ 50°C 50 < T
a
≤ 65°C
T6 85 65 65 60
T5 95 85 85 75
T4 130 125 125 115
T3 180 180 165 140
Use heat
resistance cable
for T
p
above: 1
165 130 100
1 Cables must withstand a continuous operating temperature of 85 °C.
Temperature class
(for gasses)
Maximum surface
temperature for
dust [°C]
Max. process temperature Tp [°C]
T
a
≤ 40°C 40 < T
a
≤ 50°C 50 < T
a
≤ 65°C
T6 85 80 80 75
T5 95 95 95 95
T4 130 130 130 130
T3 180 180 180 145
Use heat
resistance cable
for T
p
above: 1
never 165 90
1 Cables must withstand a continuous operating temperature of 85 °C.