KROHNE OPTISONIC 3400 Ex EN - Manual (Page 14)

2
TEMPERATURE LIMITS
14
OPTISONIC 3400
www.krohne.com 10/2013 - 7312472200 - AD EX OPTISONIC 3400 -en- R02
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/..Ex
and ultrasonic compact flowmeters with type designation OPTISONIC 3400 C(/i)- Ex 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.
2.2 UFC 400 F(/i)-Ex
The UFC 400 F/…-Ex flow converter in remote design is suitable for ambient temperatures in
the range -40 to +65°C when equipped with basic I/O and -40 to +60°C for all other I/O
configurations.
The surface temperature always remains below 80°C. The flow converter in
remote 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)-Ex
The OPTISONIC 3400 C/…-Ex compact flowmeter is suitable for ambient temperatures in
the range of -40...65°C, when equipped with basic I/O, and suitable for an ambient temperature
range of -40…60°C for all the other I/O configurations.
The following temperature limitations should be maintained for the compact flowmeter with
aluminum MH 300 housing and basic I/O.
Temperature classification OPTISONIC 3400 C-.. with aluminum MH 300 housing and
basic I/O.
Temperature classification 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 ≤ 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 Ta Ta Ta Ta ≤ 65 65 65 65ºC C C C
T6 80 80 80 40
T5 95 95 95 40
T4 130 130 95 40
T3 180 145 95 40
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