Temperature limits, 1 general – KROHNE OPTISONIC 3400 CSA EN User Manual
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TEMPERATURE LIMITS
2
13
OPTISONIC 3400
www.krohne.com
10/2013 - 7313222100 - AD CSA OPTISONIC 3400 -en- R01
2.1 General
Due to the influence of the process medium temperature (and heating temperature for HJ-
versions), ultrasonic flow sensors in field design with type designation OPTISONIC 3000 F/..DIV1
and ultrasonic compact flowmeters with type designation OPTISONIC 3400 C(/i)- DIV1 are not
allocated to any fixed temperature class. See the temperature classification tables on the
following page for more details. The temperature limits apply under the following conditions:
• The device is installed and operated in accordance with the installation directions given in the
manual.
• The device 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 ultrasonic signal converter housing.
• For Class II, group E and F the maximum allowed surface temperature is limited to 200°C and
for Class II, group G and Class III it is limited to 165°C.
2.2 UFC 400 F(/i)-DIV1
The UFC 400 F/…-DIV1 flow converter in remote design is suitable for ambient temperatures in
the range -40 to +60°C. The surface temperature always remains below 80°C.
The flow converter inremote design is not influenced by the process temperature, because it is
installed on a distance of the remote flow sensor. It therefore has a temperature rating of T6.
2.3 OPTISONIC 3400 C(/i)-DIV1
The OPTISONIC 3400 C/…-DIV1 compact flowmeter is suitable for ambient temperatures in
the range of -40...60°C.
The following temperature limitation / classification should be maintained:
OPTISONIC 3400 C-.. with aluminum MH 300 housing and basic I/O.
OPTISONIC 3400 C/i-.. with aluminum MH 300 housing and all other I/O configurations.
Temperature class
Temperature class
Temperature class
Temperature class Maximum process temperature [
Maximum process temperature [
Maximum process temperature [
Maximum process temperature [ºC] at ...
C] at ...
C] at ...
C] at ...
Ta
Ta
Ta
Ta ≤ 40
40
40
40ºC
C
C
C
Ta
Ta
Ta
Ta ≤ 50
50
50
50ºC
C
C
C
Ta
Ta
Ta
Ta ≤ 55
55
55
55ºC
C
C
C
Ta
Ta
Ta
Ta ≤ 60
60
60
60ºC
C
C
C
T6
80
80
80
80
T5
95
95
95
95
T4
130
130
130
95
T3
180
180
145
95
Temperature class
Temperature class
Temperature class
Temperature class Maximum process temperature [
Maximum process temperature [
Maximum process temperature [
Maximum process temperature [ºC] at ...
C] at ...
C] at ...
C] at ...
Ta
Ta
Ta
Ta ≤ 45
45
45
45ºC
C
C
C
Ta
Ta
Ta
Ta ≤ 50
50
50
50ºC
C
C
C
Ta
Ta
Ta
Ta ≤ 55
55
55
55ºC
C
C
C
Ta
Ta
Ta
Ta ≤ 60
60
60
60ºC
C
C
C
T6
80
80
75
25
T5
95
95
75
25
T4
130
130
75
25
T3
180
130
75
25