Kobold Heinrichs V31, Supplementary Operating Instructions

Page: 7 / 12

Heinrichs Messtechnik GmbH
Ex- Supplement operating manual V31 Page 7 of 12
4. Safety Instructions
Warning:
Only devices with Ex marking must be operated in hazardous areas!
4.1 Atmospheric conditions
According to EN 1127-1 hazardous area is defined as a mixture of air and flammable gases, vapors mist or dust
under atmospheric conditions. These are defined according to DIN EN ISO 80079-36, para 1 with following values:
Tatm = -20°C
… +60°C and Patm = 0, 8 … 1, 1 bar. Out side this range there are no safety related characteristics
available for most of ignition sources.
Inside the tube Variable Area Flow Meters work typically outside the atmospheric conditions of 0, 8 … 1, 1 bar.
Therefore, regardless of zoning, explosion protection cannot be applied due to a lack of safety related
characteristics.
The operation with flammable media is therefore only permissible if no explosive atmosphere (medium / air
mixture) is formed inside the Flow Meter. If this condition is not met, the risk of ignition in each case has to be
evaluated by the operator, taking into account the existing parameters (e.g. pressure, temperature, medium,
materials inside the tube).
4.2 Hot surfaces
The unit possesses no own energy sources, which would lead to an increase in surface temperature. Thus, the
maximum surface temperature is therefore dependent on the operating conditions (such as fluid temperature, heat
radiation or with heating jacket version of the heating medium).
For this reason, a temperature class / surface temperature range is stated on the rating plate of the device. Further
information is given in these operating instructions. The max. permissible ambient and operating temperature
corresponds to the data of the standard operating instructions
.
4.3 Electrostatic charge
4.3.1 Electrostatic charge of non-conductive parts of the housing during cleaning.
Warning:
The protective cover of the measuring glass is produced of non-conductive polycarbonate
which could become electro statically charged due to friction when cleaned with a dry cloth
and thus generate an ignitable spark. Therefore, to prevent electrostatic charging clean only
with a damp cloth.
See also the warning on the instrument.
Achtung! / Caution!
Gefahr elektrostatischer
Aufladung! Nicht reiben!
Danger of electrostatic charge!
Do not rub!