Kobold DON-05Bx, Руководство по эксплуатации, Страница: 44 / 55

DON
page 44 DON K18/0418
Klemmenab-
deckungsschraube
Klemmen-
abdeckung
Ausgangs-
platine
Exd
Kennzeichnung
Nieten
Typenschild
Gerätekopf
15. ATEX Exd version
Concerning electronic options RE / BE / HE / DE / GE / KE / LE)
Products which were ordered with the optional encapsulated pressure-proof
connector housing (Exd) are marked with an ATEX label (see figure). The label
includes details relating to explosion group and temperature class. Before
installing and operating the device, the label should be checked to ensure it
contains all the required details.
The relevant explosion groups and temperature classes are as follows:
Ex I : Devices for use in mining with mine gas accumulation. Mine gas refers to
the methane gas naturally generated from coal and coal seams in the coal mining
industry.
Only stainless steel devices are suitable for use in explosion group I
(in accordance with IEC 60079-0, section 8.1.1). Aluminium devices are not
permitted for explosion group I. If the flowmeter includes the label for group I, the
surface temperature of the process fluid must not exceed 150 °C.
Ex IIC T4/T6: Devices for use in areas with potentially explosive atmospheres
outside the mining field, but with mine gas accumulation. Either aluminium or
stainless steel devices may be used in explosion group II. For T4 temperature
class applications, the surface temperature of the process fluid must not exceed
120 °C, and for T6 temperature class applications, the surface temperature of the
process fluid must not exceed 70 °C.
Operating instructions :
The Exd device must be removed from
the explosive zone before the terminal
cover can be opened.
The maximum permissible annular gap
between the terminal cover and the
measuring device must not exceed 0.15 mm.
If the annular gap exceeds 0.15 mm due to
corrosion or wear and tear, the worn out
parts must be replaced.
The product does not meet the requirements
of the Exd protection class unless the
terminal cover is completely snapped into
place and screwed down. No other screw
sizes or lengths may be used than the ones
of the original screws.
Terminal cover
screws
Rivets
Type plate
Device head
Terminal cover
Output board
Exd label