KROHNE BM 102 ATEX EN User Manual
Page 7
Supplementary Installation and Operating Instructions BM 102 ATEX
7
1.4 Allowable
temperatures
1.4.1 Process
temperature
For applications requiring Category 1 G, 1/2 G or 1/2 D equipment, the following process
temperatures are allowed as a function of the Temperature Class:
Temperature Class
Process temperature
T6 -20…+48°C
T5, T4, T3
-20…+60°C
For applications requiring Category 2 G or 2 D equipment, the following process temperatures are
allowed as a function of the Temperature Class:
Temperature Class
Process temperature
T6 -30…+85°C
T5 -30…+100°C
T4, T3
-30…+135°C without extension
T3
-30…+200°C with distance piece
(high temperature option)
1.4.2 Ambient temperature for the electronic equipment
For applications requiring Category 1 G equipment, the following ambient temperatures are
allowed as a function of the Temperature Class:
Temperature Class
Ambient temperature
T6 -20…+48°C
T5, T4, T3
-20…+60°C
For applications requiring Category 1/2 G, 1/2 D, 2 G or 2 D equipment, the following ambient
temperatures are allowed as a function of the Temperature Class:
Temperature Class
Ambient temperature
T6, T5, T4, T3
-30…+60°C without extension
and with a process temperature < 135°C
T3 -30…+55°C
with
extension
≥ 50mm
and a process temperature < 200°C
-30…+60°C
with
extension
≥ 100mm
and a process temperature < 200°C