Aplisens PRE-28.Modbus Gebruikershandleiding - Pagina 12
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IO.PCE-28....PC-29.Exd
7.3.
Electrostatic hazards
The non-conductive layer applied onto the conductive substrate is comprised of a plastic
plate. In areas with dust explosion hazard, these transmitters should be installed in such a
manner as to ensure that there is no electrostatic charging, especially through contact with
charged dust escaping or blown from nearby equipment.
8.
INSTALLATION
8.1.
General recommendation
Given their small weight and size, transmitters may be mounted directly on rigid impulse
pipes.
When selecting assembly components, it may be helpful to refer to information on
connection elements, reduction elements, sockets, valves, reduction clamps and signal
tubes provided by APLISENS.
Further data may be found in the "Valves and fitting accessories" catalogue card.
While installing and using the transmitter, the diaphragm should not be exposed to
damage. The transmitter diaphragm is made of acid-resistant steel or of
Hastelloy and cannot be exposed to media that may damage it.
8.2.
Installation in areas with dust explosion hazard
The 2G (2D) category of the transmitter means that the transmitter and process connector
may be installed in a hazardous area of a 1st (21) or 2nd (22) class (example is shown in
Fig. 5).
Wires or cable must not be exposed to mechanical damage.
In order to protect the wires or cable against mechanical damage and to maintain
protection degree IP66 and IP68 (see item 10.3.6.), screw the SGM or FL electric
connection into the cover or tube using:
- for 1/2 "NPT thread - Loctite 577 sealing.
-
for thread M20x1,5 - gasket.
The M20x1,5-6g and 1/2"NPT electric connection threads are made with accuracy
ensuring that a flameproof Exd joint is formed.
Temperature class and maximum surface temperature depending on ambient temperature
Ta and process temperature Tp:
Operating temperature range Temperature class and
Ambient
Process
temperature
temperature
Ta ≤ 70ºC
Tp ≤ 70ºC
Ta ≤ 80ºC
Tp ≤ 85ºC
Ta ≤ 80ºC
Tp ≤ 115ºC
Ta ≤ 65ºC
Tp ≤ 75ºC
Ta ≤ 65ºC
Tp ≤ 105ºC
10
maximum surface
temperature
T6/T85ºC
T5/T100ºC
T4/T120ºC
T6/T85ºC
T5/T100ºC
Transmitters with FL electric
connection
(with LgYc wires with PVC insulation)
Transmitters with SGM electric
connection
(with LiYwC11Y (1) 4x0,35c cable
with polyurethane insulation)
04.A.004