Aplisens APM-2 Manual do dispositivo - Página 7

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TRANSMITTER DESIGN

The modular differential pressure transmitters consist of: central unit HUB two pressure

transmitters PC1, PC2.

The basic central unit HUB components are: housing made of 316 (1.4401) stainless steel or

aluminium, electronic module. Transmitters in aluminium, steel enclosures are allowed for II

and III group.

The PC1 and PC2 transmitters consist of housing and a measuring head converting the

signal from the head to the output signal. PC1 and PC2 transmitter housings are made of 316

or 304 steel and are approved for Group II and III.

ELECTROSTATIC HAZARDS

The paint, plastic nameplate and diaphragm seals coated with PTFE form a non-conducting

layer applied on a conducting base of enclosure or diaphragm seals. Transmitters with this

design in a dust-explosion zone should be installed in a place where electrostatic charging is

impossible, in particular by contact with electrically charged dust falling off or blown from

neighboring devices.

When performing connection and maintenance activities in the hazardous area, the

possibility of electrostatic discharge should be eliminated. Do not wipe the transmitter dry.

SPECIAL CONDITIONS OF USE

a) In hazardous zones, transmitters with painted aluminum enclosures as well as

transmitters equipped with equipped with plastic nameplate and PTFE-coated

diaphragm separator components should be installed in way that prevents

electrostatic charging specified in accordance with point 6.

b) An intrinsically safe transmitter version with surge arrester, marked on the

nameplate as "SA" does not meet the requirements of clause 10.3 of EN 60079-11

(500Vrms). This must be taken into account when installing the device.

c) If the membrane separator contains titanium elements, it must be protected against

mechanical impact.

d) The circuit behind the galvanic separation in the central unit does not comply with

the requirements of clause 6.3.6 of PN 60079-11:2012 for solid insulation to the

housing. Potential equalisation must be applied between the transmitter central unit

and transmitters PC1 and PC2.

e) The power supply for the transmitter shall comply with overvoltage category II (or

better) according to EN 60664-1.

f) Flameproof joints are not intended to be repaired.

Revision 01.A.001/2022.09

EN.IX.APM.2