Ambient Temperature Limits; Storage Temperature; Environment Class; Protection Category - KROHNE BM 70 M Series Installation And Operating Instructions Manual

6.2.4 Ambient temperature limits

Signal converter:
Measuring function OK, but LCD "freezes up"
Functional upper limit, for max. 2 hours
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

6.2.8 Shock resistance

The device has been found to withstand the impact test in conformity with EN 61010, Section 8.2,
with 0.5 J energy, and the drop test to prEN 50178:1994.

6.2.9 Vibration endurance limit

Type test conditions

6.2.10 EMC

The devices satisfy the requirements of EN 50081-1, EN 50082-2 and the NAMUR
Recommendation.
6.3

Product conditions

6.3.1 Physical properties of the products

Physical properties (such as density, viscosity, conductivity, relative permittivity, magnetic
properties, etc.) have no effect on measurement results.
The relative permittivity is merely required to have a minimum value in order to ensure reliable
measurements (see Section 6.3.2).
22
min. - 40°C (-40°F)
max. +70°C (+158°F)
IP 66 / IP 67 (equivalent to NEMA 6)
acc. to "IACS"
BM 70 M