KROHNE BM 26 BASIC-ADVANCED ATEX EN - Manual (Page 23)

ASSEMBLED EQUIPMENT
4
23
BM 26 BASIC/ADVANCED
www.krohne.com 12/2011 - 4000347102 - AD ATEX BM 26 Bas-Adv R02 en
4.2.2 Operating conditions
The ATEX equipment category and temperature class give the ambient temperature range for
the measuring chamber and the attached options. This data is marked on the nameplates of the
measuring chamber and the attached options.
Maximum process temperature
WARNING!
Insulation of the analog transmitter
Insulation of the analog transmitter Insulation of the analog transmitter Insulation of the analog transmitter
The Ex data for this device is only applicable if you obey these instructions:
• Put insulation between the measuring chamber and the analog transmitter.
• Do not cover any part of the device with insulation.
Figure 4-2: Analog transmitter and insulation for the measuring chamber
1 Analog transmitter
2 Measuring chamber (cross-section)
3 Put insulation between the measuring chamber and the analog transmitter
4 Insulation (cross-section). Do not cover any part of the analog transmitter with insulation.
DANGER!
The ambient temperature will have an affect on the electrical characteristics of intrinsically safe
systems. For data about the electrical charateristics of the limit switch, refer to Ex i limit
switches on page 13
. For data about the electrical charateristics of the analog transmitter, refer
to Ex i analog transmitter on page 19 . Obey the temperature limits in the tables that follow:
Temperature class Maximum process temperature
[°C] [°F]
T6 +68 +154
T5 +80 +176
T4 +108 +226
T3 +160 +320