User Manual

Installation and operating instructions BM 70 A/P Page: 25 11/00
6.2 Ambient conditions
6.2.1 Hazardous locations
BM 70 A/P Ex is suitable for use in hazardous locations of the following zones: 0, 1, 2
Temperature classes: T6...T2; danger groups: IIA...IIC
For further information: see Section 10.
6.2.2 Ambient temperature of signal converter
BM 70 A/P with horn antenna or Wave-Guide: -20 ... +55°C (-4 ... +131°F)
A "BM 70 sunshade" should be fitted if the converter is located in the open with the likelihood of
strong insolation (see Section 6.1.9).
6.2.3 Flange temperature
Horn antenna, Wave-Guide (T
amb* ≤ 50°C): -30 ... +130°C (-22 ... +266°F)
Horn antenna, Wave-Guide (Tamb* ≤ 55°C): -30 ... +120°C (-22 ... +248°F)
High-temperature version with distance piece and
FFKM gasket (Kalrez 4079
or Parofluor V3819-75): -30 ... +250°C ** (-22 ... +482°F)
Kalrez 2035 gasket: -30 ... +210°C (-22 ... +410°F)
Viton gasket: -30 ... +200°C (-22 ... +392°F)
FEP-sheathed gasket: -30 ... +200°C (-22 ... +392°F)
Wave-Stick, permanently: -20 ... +100°C (-4 ... +218°F)
Wave-Stick, pressure-dependent (see 6.3.5), with no mechanical
loading radial to the rod: bis +150°C (302°F)
Wave-Stick, steam cleaning (CIP, SIP) for 30 minutes: max. +160°C (320°F)
* Tamb is the ambient temperature of the signal converter
** Safety limit: +280°C (536°F)
6.2.4 Ambient temperature limits
Signal converter:
Measuring function OK, but LCD "freezes up": min. - 40°C (-40°F)
Functional upper limit, for max. 2 hours: max. +70°C (+158°F)
Flange system:
see Section 6.2.3
6.2.5 Storage temperature
-20 ... +60°C (-4 ... +140°F)
6.2.6 Environment class
Locations exposed direct to open-air climate, D1 Severity in conformity with EN 60654-1
6.2.7 Protection category
Signal converter: IP 66 / IP 67 (equivalent to NEMA 6)