Manual

6
2 Safety
2Safety
2.1 Intended use
The capacitive level switch measures the point level of solid and liquid media in applications with require-
ments for overfill and dry run protection and can also be used for media detection, e.g. in separation and
cleaning processes.
The device is suitable for installation in pressurized tanks, pipelines, containers, in hygienic areas and
as part of overfill protection systems according to WHG and can be used in explosion-proof areas.
When connecting to intrinsically safe electrical circuits, the intrinsically safe version of the device [Ex i]
fulfils the requirements for explosion group II of categories 1 G and 1 D, as well as 2 G and 2 D. It is
therefore suitable for use in the potentially explosive area of zone 0, 1, and 2 for gas (G) and zone 20,
21, and 22 for dust (D). Here, a certified, intrinsically safe isolation amplifier [Ex ia] must be used.
The Ex approval becomes null and void if the device is used contrary to its intended use or if the safety
requirements in this operating manual are not complied with.
The operating manual is part of the device. The device is only intended for use according to this operat-
ing manual.
2.2 Qualification of personnel
The personnel deployed must meet the following requirements in all phases of the product lifecycle:
• Trained electrical, mechanical, and plant engineering personnel.
• Members of personnel are familiar with this documentation and the safety information and warnings
it contains.
2.3 Risk assessment
For explosion-proof versions, the operator must create the Ex-protection document for the system and
carry out the zoning and risk assessment (e.g. based on ATEX 0137).
Container for liquids Container for bulk material
A Overfill safeguard, full indicator A Overfill safeguard, full indicator
B Process limit level B Process limit level
C Dry-run protection, empty indicator C Dry-run protection, empty indicator