Aplisens APM-2 Application guide

EXPLOSION-PROOF DEVICE MANUAL
SMART ELECTRONIC DIFFERENTIAL PRESSURE
TRANSMITTERS
APM-2
EN.IX.APM.2.
SEPTEMBER 2022
APLISENS S.A., 03-192 Warsaw, Morelowa 7 St.
tel. [phone]; fax [phone]
www.aplisens.com, e-mail: [email protected]
Revision 01.A.001

Symbols used
Symbol
Description
Warning to proceed strictly in accordance with the information contained in the
documentation in order to ensure the safety and full functionality of the device.
Information particularly useful during installation and operation of the device.
Information particularly useful during installation and operation of an Ex type
device.
Information on disposal of used equipment.
BASIC REQUIREMENTS AND SAFE USE
The manufacturer will not be liable for damage resulting from incorrect installation,
failure to maintain suitable technical condition of the device or use of the device
other than for its intended purpose.
Installation should be carried out by qualified staff having the required
authorizations to install electrical and I&C equipment. The installer is responsible for
performing the installation in accordance with manual as well as with the
electromagnetic compatibility and safety regulations and standards applicable to the
type of installation.
All safety and protection requirements must be observed during installation,
operation and inspections.
If a malfunction occurs, the device should be disconnected and handed over to the
manufacturer for repair.
In order to minimize the risk of malfunction and associated risks to staff, the device
is not to be installed or used in particularly unfavourable conditions, where the
following hazards occur:
−possible mechanical impacts, excessive shocks and vibration;
−excessive temperature fluctuation;
−water vapour condensation, dusting, icing.
Installation of the transmitter in explosion-risk atmospheres must comply with the
requirements of relevant instructions and national standards and regulations.
Changes made to the manufacturing of products may be introduced before the paper version of the
manual is updated. The up-to-date manuals are available on the manufacturer's website:
www.aplisens.com.

EN.IX.APM.2
Revision 01.A.001/2022.09 3
TABLE OF CONTENTS
1. INTRODUCTION..........................................................................................5
2. SAFETY.......................................................................................................5
3. COMPLETE DELIVERY CHECKLIST .........................................................6
4. IDENTIFICATION MARKS...........................................................................6
5. TRANSMITTER DESIGN.............................................................................7
6. ELECTROSTATIC HAZARDS.....................................................................7
7. SPECIAL CONDITIONS OF USE................................................................7
8. TRANSMITTER PROTECTION LEVEL (EPL) AND HAZARDOUS AREAS8
8.1. INTRINSICALLY-SAFE Exi TRANSMITTERS ACCORDING TO
CERTIFICATE JSHP 22 ATEX 0051X..............................................................9
8.2. Standards used for assessment..................................................................................9
8.3. Transmitter explosion-proofing designations according to certificate JSHP 22 ATEX
0051X..........................................................................................................................9
8.4. Minimum supply voltage..............................................................................................9
8.5. Load resistance...........................................................................................................9
9. PERMISSIBLE PARAMETERS OF Exi TRANSMITTERS. .......................10
9.1. Linear power supply example....................................................................................10
9.2. Trapezoidal power supply example...........................................................................10
9.3. Orthogonal power supply example............................................................................11
10.CONNECTING Exi TRANSMITTERS........................................................11
10.1. FLAMEPROOF Exd TRANSMITTERS ACCORDING TO
CERTIFICATES JSHP 22 ATEX 0051X..........................................................13
10.2. Standards used for assessment................................................................................13
10.3. Transmitters explosion-proofing designations (Exd and Ext) according to certificate
JSHP 22 ATEX 0051X..............................................................................................13
11.PERMISSIBLE PARAMETERS OF Exd and Ext TRANSMITTERS .........13
11.1. Ambient temperature range and temperature classes ..............................................13
11.2. Power supply, connection and operation of Exd transmitters....................................14
12.ADDITIONAL INFORMATION...................................................................16
12.1. Additional information................................................................................................16
12.2. History of revisions....................................................................................................17
LIST OF DRAWNINGS
Figure 1. Sample transmitter nameplate.................................................................................6
Figure 2. Transmitter installation in potentially explosive areas. .............................................8
Figure 3. Principle of power supply from a linear source.......................................................10
Figure 4. Principle of power supply from a trapezoidal source..............................................10
Figure 5. Connecting Exi transmitter.....................................................................................11
Figure 6. Connecting Exd transmitter....................................................................................14
Figure 7. Installation of cable entries and blinding plugs.......................................................15

EN.IX.APM.2
4Revision 01.A.001/2022.09
LIST OF TABLES
Table 1. Minimum supply voltage of an Exi transmitter. ..........................................................9
Table 2. Permissible input parameters of an Exi transmitter..................................................10
Table 3. Temperature classes and maximum surface temperature depending on ambient and
fluid temperature....................................................................................................................13
Table 4. Maximum supply voltage for Exd and Ext transmitters............................................14
Table 5. List of equivalent cable entries ................................................................................16
Table 6. List of equivalent blinding plugs...............................................................................16

EN.IX.APM.2
Revision 01.A.001/2022.09 5
1. INTRODUCTION
This manual is only applicable to the APM-2 series transmitters in Ex (explosion-proof), Exi
(intrinsically safe), Exd and Ext (flameproof). The transmitters are identified with model ID on
nameplates and also as specified in section 4. Ex information are included in the “Product
Certificate”. Model ID indicates type and version of transmitter. The manual contains most
important information on intrinsically safe and flameproof transmitters compliant with ATEX
directive. If explosion-proof transmitters are installed, refer to this manual and also:
- User’s manual EN.IO.APM.2.
2. SAFETY
−The installation and start-up of the device and any activities related to operation
shall be carried out after thorough examination of the contents of user’s manual
and the instructions related thereto.
−Installation and maintenance should be carried out by qualified staff having the
required authorizations to install electrical and measuring devices.
−The device shall be used according to its intended purpose in line with the
permissible parameters.
−Before installing or disassembling the device, it is absolutely necessary to
disconnect it from the power source.
−No repairs or alterations to the transmitter electronic system are permitted.
Assessment of damages and possible repair may only be performed by the
manufacturer or authorized representative.
−Do not use instruments if damaged. In case of malfunction, the device must be
put out of operation.
−If the equipment is used in Ex zones, the technical requirements specified in this
manual and applicable local (national) regulations must be followed.

EN.IX.APM.2
6Revision 01.A.001/2022.09
3. COMPLETE DELIVERY CHECKLIST
The user receives the following with the transmitter:
a) Product Certificate, which also constitutes a warranty card;
b) Declaration of Conformity;
c) Certificate copy (on request);
d) EN.IX.APM.2 explosion-proof device manual;
e) EN.IO.APM.2 user manual.
Items b), c), d), e) are available at www.aplisens.com.
4. IDENTIFICATION MARKS
Ex transmitters are delivered with a nameplate which contains data specified EN.IO.APM.2
and also the following:
a) Designation of explosion-proof design type, certificate number;
b) Parameter values, e.g. Ui, Ii, Ci, Li for Exi transmitters;
c) Year of manufacture;
d) „SA Version” inscription - isolated power supply for intrinsically safe transmitters with
overvoltage protection in which ground isolated power supply should be used.
Figure 1. Sample transmitter nameplate.

EN.IX.APM.2
Revision 01.A.001/2022.09 7
5. 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.
6. 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.
7. 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.

EN.IX.APM.2
8Revision 01.A.001/2022.09
8. TRANSMITTER PROTECTION LEVEL (EPL) AND
HAZARDOUS AREAS
Ga/Gb EPL protection level means that the transmitter can be installed in Zone 1 or 2, and
transmitter process connectors of PC1, PC2 transmitters, can connect to Zone 0.
Da EPL protection level means that the transmitter and process connector can be installed in
Zone 20 or 21.
1. Tank; Zone 0;
2. PC1 and PC2 transmitters;
3. Central unit;
4. Equipotential bonding conductor;
5. Equipotential bonding line;
6. Associated apparatus with appropriate approval.
Figure 2. Transmitter installation in potentially explosive areas.

EN.IX.APM.2
Revision 01.A.001/2022.09 9
8.1. INTRINSICALLY-SAFE Exi TRANSMITTERS ACCORDING
TO CERTIFICATE JSHP 22 ATEX 0051X
8.2. Standards used for assessment
The transmitters are manufactured in compliance with the following standards:
EN IEC 60079-0:2018; (IEC 60079-0:2017 ed. 7.0),
EN 60079-11:2012; (IEC 60079-11:2011 ed. 6.0.).
8.3. Transmitter explosion-proofing designations according to
certificate JSHP 22 ATEX 0051X
The following ATEX markings apply only to intrinsically safe transmitters:
ATEX: II 1/2G Ex ia IIC T5/T4/T3 Ga/Gb
II 1D Ex ia IIIC T100ºC/T135ºC/ T155ºC Da
JSHP 22 ATEX 0051X
As standard, the transmitters are manufactured for explosive gas atmospheres.
A customer can also order a transmitter for explosive dust atmospheres.
8.4. Minimum supply voltage
Table 1. Minimum supply voltage of an Exi transmitter.
Minimum supply voltage for
transmitters with backlight off
Minimum supply voltage for
transmitters with backlight on *)
13V
16V
*) Backlight can only be turned on at transmitter manufacturing
stage.
8.5. Load resistance
a) For a linear power supply from a barrier:
󰇟󰇠    󰇛 󰇜

b) For power supply from a trapezoidal or orthogonal source.
󰇟󰇠  

Rw –baririer resistance;
Uzas –minimum voltage of the barrier used.

EN.IX.APM.2
10 Revision 01.A.001/2022.09
9. PERMISSIBLE PARAMETERS OF Exi TRANSMITTERS.
Table 2. Permissible input parameters of an Exi transmitter.
Temperature
class
Maximum
surface
temperature
of the
transmitter
Linear power
supply
Trapezoidal
power supply
Orthogonal power
supply
Ui=30V
Ui=24V, UQ=48V
Ui=24V
Ui=24V
Ii=0,1A
Ii=0,05A
Ii=0,025A
Ii=0,05A
Pi=0,75W
Pi=0,6W
Pi=0,6W
Pi=1.2W
Ci=7,5nF
Ci=7,5nF
Ci=7,5nF
Ci=7,5nF
Li=18µH
Li=18µH
Li=18µH
Li=18µH
T5
100°C
Ta≤60°C; Tm≤90°C
T4
135°C
Ta≤80°C; Tm≤125°C
T3
155°C
Ta≤80°C; Tm≤150°C
Ta –ambient temperature;
Tm –process temperature.
Supply power to transmitters from supply and measurement devices with
applicable intrinsic safety certificates whose parameters of outputs to a hazard
zone should not exceed the permissible transmitter power supply parameters
specified above.
9.1. Linear power supply example
For example, linear power supply is provided by a typical barrier with the following
parameters
Uo = 28V; Io = 0,1A; Po = 0,7W; Rw = 280.
Figure 3. Principle of power supply from a linear source.
9.2. Trapezoidal power supply example
Uo = 24V; Io = 50mA; Po = 0,7W
An example of trapezoidal power supply is shown in Figure 4.
Figure 4. Principle of power supply from a trapezoidal source.
If 
, UQ, I0, P0have the following relations:
 

transmitter
transmitter

EN.IX.APM.2
Revision 01.A.001/2022.09 11
If  , UQ, I0, P0have the following relations:
󰇛 󰇜

Resistance Rw:


9.3. Orthogonal power supply example
Uo = 24V Io = 25mA Po = 0,6W
Uo = 24V Io = 50mA Po = 1,2W
Orthogonal power supply means that the voltage of an intrinsically safe power adapter
does not change until the current limiter is activated.
The level of protection of orthogonal power supply adapters is usually “ib”. A transmitter
supplied from such power adapter is usually an “ib” intrinsically safe device.
An example of power supply in practice:
A stabilized power adapter with Uo = 24 V, “ib” protection level and current limited to
Io = 25 mA.
10. CONNECTING Exi TRANSMITTERS.
Transmitter and equipment in the transmitter measurement loop must be connected
in compliance with intrinsic safety and explosion proofing standards and conditions
for application in risk zones. If intrinsic safety rules are not followed, explosion can
occur and people can be exposed to danger.
Figure 5. Connecting Exi transmitter
The central unit is equipped with an additional communication resistor RD=240Ω.
<SIGNAL -> and <TEST -> terminals are short-circuited in factory. RDresistor is used
when the transmitter need to be communicated with locally (from its terminals) and a
Ro < 240 Ω. <SIGNAL -> and <TEST -> terminals must be open-circuited then.

EN.IX.APM.2
12 Revision 01.A.001/2022.09
The electrical system for connecting transmitters should meet installation
requirements of applicable standards.
No repairs or alterations to the transmitter electrical system are permitted. Only the
manufacturer or a facility authorized by the manufacturer may assess damages and
repair the device.
“Version SA” transmitters should be supplied from devices equipped with galvanically
isolated power supply. If galvanically isolated power supply is not possible, the
transmitter or metal parts connected to it should be properly grounded, for instance
with an equipotential wiring or an equipotential bonding between the transmitter and
the negative pole of power supply barrier.
Electrical potential equalization must be ensured between the central unit and
transmitters PC1 and PC2 remote from the central unit.

EN.IX.APM.2
Revision 01.A.001/2022.09 13
10.1. FLAMEPROOF Exd TRANSMITTERS ACCORDING TO
CERTIFICATES JSHP 22 ATEX 0051X
10.2. Standards used for assessment
The transmitters are manufactured in compliance with the following standards:
EN IEC 60079-0:2018; (IEC 60079-0:2017 ed. 7.0),
EN 60079-11:2012; (IEC 60079-11:2011 ed. 6.0.),
EN 60079-1:2014; (IEC 60079-1:2014 ed. 7.0),
EN 60079-31:2014; (IEC 60079-31:2013 ed. 2.0).
10.3. Transmitters explosion-proofing designations (Exd and Ext)
according to certificate JSHP 22 ATEX 0051X
The following ATEX markings apply only to flameproof safe transmitters Exd and Ext:
ATEX: II 1/2G Ex db ia IIC T5/T4/T3 Ga/Gb
II 1D Ex ia ta IIIC T100ºC/T135ºC/ T155ºC Da
JSHP 22 ATEX 0051X
11. PERMISSIBLE PARAMETERS OF Exd and Ext
TRANSMITTERS
11.1. Ambient temperature range and temperature classes
Table 3. Temperature classes and maximum surface temperature depending on ambient and
fluid temperature.
Operating temperature range
Temperature class and
maximum surface temperature
Ambient
temperature
Process
temperature
-40ºC ≤ Ta≤ 75ºC
90ºC
T5/T100ºC
125ºC
T4/T135ºC
150ºC
T3/T155ºC

EN.IX.APM.2
14 Revision 01.A.001/2022.09
11.2. Power supply, connection and operation of Exd transmitters
Connect the transmitter according to the wiring diagram (Figure 6). The transmitter
electrical connections in potentially explosive zones should be made by personnel
having necessary knowledge and experience in this respect. The transmitter should
be properly grounded by means of a grounding terminal.
Transmitter and equipment in the transmitter measurement loop must be connected
in compliance with explosion proofing standards and conditions for application in
explosion risk zones. If these rules are not followed, explosion can occur and people
can be exposed to danger.
Figure 6. Connecting Exd transmitter.
The transmitter should be supplied with maximum voltage specified in the table
below (24 VDC rating) from transformer power supplies or other devices providing at
least enhanced isolation between primary and secondary winding in which voltages
not larger than 250 VAC occur. It is responsibility of the user to provide power supply
compliant with the requirements above.
Table 4. Maximum supply voltage for Exd and Ext transmitters
Maximum supply voltage
36V DC
In an explosion risk zone, do not remove the cover of supplied transmitter and do not
connect to the terminals, and do not change the position of local indicator (display).
For transmitter calibration or check outside a risk zone, a communicating device can
be connected to <SIGNAL +> and <TEST +> terminals.
The transmitter is equipped with a communication resistor RD= 240 Ω, which is short-
circuited at <SIGNAL -> and <TEST -> terminals in factory. RDresistor is used when
the transmitter need to be communicated with locally (from its terminals) and a Ro <
240 Ω. <SIGNAL -> and <TEST -> terminals must be open-circuited then.
In order to secure the side covers against loosening, unscrew the hex socket screws
pressing the screw heads against the edges of the covers. The method of locking the
covers against unscrewing and the possible method of sealing the transmitter are
presented in the EN.IO.APM.2 user manual.

EN.IX.APM.2
Revision 01.A.001/2022.09 15
No repairs or alterations to the transmitter enclosure elements and electrical system
are permitted. Flameproof joints are not designed to be repaired. Only the
manufacturer or a facility authorized by the manufacturer may assess damages and
repair the device.
Due to the type of enclosure material (light alloy with high aluminum content), the
user is obliged to ensure that in the transmitter installation site its enclosure cannot
be hit and, consequently, damaged.
In a transmitter enclosure there are two holes for installing, one for a cable entry and
second for a blinding plug with M20x1.5 or 1/2 NPT thread. As standard, the
transmitter is delivered to the customer without cable gland installed. After
consultation with the manufacturer, the user can purchase a transmitter with a cable
gland, or without a cable gland and the missing cable gland purchase separately. A
transport plug is installed in the cable gland place. In such case, the transport plug
should be removed and appropriate cable gland installed (Figure 7) before the
transmitter is installed. It is responsibility of the user to install a certified cable gland
compliant with the list of equivalent cable glands in Table 5.
As a blinding plug, an Aplisens plug supplied with the transmitter or a certified
blinding plug compliant with the list of equivalent blinding plugs in Table 6 can be
used. It is allowed to install other types of certified cable entries and blinding plugs
about marking Exd IIC Gb, Ex ta IIIC Da with at least IP66 protection and
- 40°C...75°C temperature range.
Apply LOCTITE 577 or SWAK MS-PTS-50 on the 1/2 NPT thread of cable gland
before installation.
When connecting, make sure that the cable type and diameter is suitable for the
cable gland used and temperature in the installation site.
Figure 7. Installation of cable entries and blinding plugs

EN.IX.APM.2
16 Revision 01.A.001/2022.09
Table 5. List of equivalent cable entries
Cable entry type
Manufacturer
Thread
Designation
IP
Certificate no.
A2F, A2FRC
CMP-
Products
M20x1.5
(1/2” NPT)
Exd IIC Gb
Exta IIIC Da
67
CML 18ATEX1321X
SS2K
CMP-
Products
M20x1.5
(1/2” NPT)
Exd IIC Gb
Exta IIIC Da
67
CML 18ATEX1321X
E1FW, E2FW
CMP-
Products
M20x1.5
(1/2” NPT)
Exd IIC Gb
Exta IIIC Da
67
CML 18ATEX1324X
PX2K, PXSS2K,
PX2KX
CMP-
Products
M20x1.5
(1/2” NPT)
Exdb IIC Gb
Exta IIIC Da
67
CML18ATEX1325X
Table 6. List of equivalent blinding plugs
Plug type
Manufacturer
Thread
Designation
IP
Certificate no.
747, 757 i 767
CMP-
Products
M20x1.5
(1/2” NPT)
Exd IIC Gb
Exta IIIC Da
Exd I Mb
67
CML 18ATEX1320X
Use a shielded or unshielded, non-reinforced cable with compact structure and
circular cross-section in an non-hygroscopic sheath made of an elastomer, e.g.
YKSLY 2*1, YnTKSYekw 1*2*1, LIYCY 2*1. If a cable of different design has to be
used, it should be agreed on with the transmitter manufacturer in order to choose a
suitable cable gland or individually purchase a cable gland suited to the cable used.
The list of equivalent cable entries is given above (Table 5). The cables should be
protected from damage by routing them in cable trays, jacket tubes, cable ladders, by
using fixed mounts, etc.
When periodic inspections are performed, the covers tightness, cable entry and cable
fixing in the cable entry should be checked. Visually check the enclosure and cable
for mechanical damage, and the nameplate for legibility. The sensor diaphragm
should be also included to periodic inspections. There shouldn’t be a signs of
damage. During maintenance it is recommended to apply acid-free petroleum jelly on
threads connection.
The connecting and operating general rules for an Exd transmitters should be
compliant with the rules and standards applicable to devices in a flameproof
enclosure:
EN 60079-14 –Electrical devices in explosive atmospheres. Part 14: Electrical
installations in risk areas (other than mines).
EN 60079-17 –Electrical devices in explosive atmospheres. Part 17: Electrical
installations inspection and maintenance in risk areas (other than mines).
Due to possible damage, the transmitter should be protected from heating
above 80ºC also when explosion hazard does not occur.
12. ADDITIONAL INFORMATION
12.1. Additional information
The manufacturer reserves the right to introduce structural and technological changes to the
device, which does not deteriorate its performance.

EN.IX.APM.2
Revision 01.A.001/2022.09 17
12.2. History of revisions
Revision
No
Document revision
Description of changes
-
01.A.001/2022.09
Initial document version. Prepared by DKD, DCF.