User Manual

Supplementary Installation and Operating Instructions BM 102 ATEX 5
1 Main safety-relevant characteristics
1.1 Approved categories
Plastic-coated probes may not be used in connection with Gas Group IIC
substances.
1.1.1 1 G
The BM 102 level gauges are installed in areas requiring Category 1 G equipment. The devices
are suitable for use in explosive atmospheres of all flammable substances of Gas Groups IIA, IIB
and IIC.
1.1.2 1/2 G and 1/2 D
The signal converter is installed in hazardous locations requiring Category 2 G or 2 D equipment.
The probe is installed in hazardous locations requiring Category 1 G or 1 D equipment. The
devices are suitable for use in explosive atmospheres of all flammable substances of Gas Groups
IIA, IIB and IIC.
Devices with plastic-coated probes may not be used for applications requiring
Category 1/2 D equipment, unless effective measures have been taken to avoid
electrostatic discharge.
1.1.3 2 G and 2 D
BM 102 devices are installed in locations requiring Category 2 G or 2 D equipment. The devices
are suitable for use in explosive atmospheres of all flammable substances of Gas Groups IIA, IIB
and IIC.
Devices with plastic-coated probes may not be used for applications requiring
Category 2 D equipment, unless effective measures have been taken to avoid
electrostatic discharge.
1.2 Maximum safety-relevant values
The input terminals of the BM 102 level gauges are not safety-separated from ground. For that
reason, only certified electrically isolated intrinsically safe equipment of ignition protection
category EEx ia IIC may be connected. This requirement applies independent of the required
Category and also if the device is not operated in the hazardous location.