User Manual

6 Supplementary Installation and Operating Instructions BM 102 ATEX
The connected equipment may not exceed the following maximum safety values of the BM 102
devices:
Ui ≤ 30 V
Ii ≤ 150 mA
Pi ≤ 1.0 W
In addition, the inner self-inductance and self-capacitance of the BM 102
Co ≤ 10 nF
Lo ≤ 10 µH
must be included in the rating of the total inductance and total capacitance connected to the
equipment. The calculated values may not exceed the values Co and Lo indicated on the supply
equipment.
1.3 Allowable operating pressure
The maximum allowable operating pressure for BM 102 level gauges that are installed in locations
requiring Category 2 G or 2 D equipment is dependent on the device flange, the flange material
and the maximum operating temperature. The maximum upper limit approved for the device is
4000 kPa (PN40 flange). This upper limit applies e.g. to a stainless steel flange at ambient and
process temperatures of 20°C (e.g. DN50, PN40). Higher pressure ratings, such as PN50, are not
allowed.
For applications requiring Category 1 G, 1/2 G or 1/2 D equipment, atmospheric conditions must
prevail inside the tank (operating pressure 80 -110 kPa).