Aplisens PCE-28 User manual

DTR.PCE.PRE-28(ENG)
APLISENS
MANUFACTURE OF PRESSURE TRANSMITTERS
AND CONTROL INSTRUMENTS
USER’S MANUAL
PRESSURE TRANSMITTERS
PCE-28
DIFFERENTIAL PRESSURE TRANSMITTERS
PRE-28
HYDROSTATIC LEVEL PROBES
PCE-28P
Edition E
WARSAW MARCH 2011
APLISENS JSC 03-192 Warszawa, ul. Morelowa 7
tel. [phone]; fax [phone]
www.aplisens.pl, e-mail: [e-mail]

Symbols used
BASIC REQUIREMENTS AND SAFE USE
- The manufacturer will not be liable for damage resulting from incorrect installation,
failure to maintain the device in a suitable technical condition, 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 pressure-measuring devices. The installer is responsible for performing the
installation in accordance with these instructions and with the electromagnetic compatibility and
safety regulations and standards applicable to the type of installation.
- Installation should be carried out by qualified staff having the required authorizations to install
electrical and pressure-measuring devices. The installer is responsible for performing the
installation in accordance with these instructions and with the electromagnetic compatibility and
safety regulations and standards applicable to the type of installation..
- If a device is not functioning correctly, disconnect it and send it for repair to the manufacturer or
to a firm authorized by the manufacturer.
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 dangers occur:
- possibility of mechanical impacts, excessive shocks and vibration;
- excessive temperature fluctuation,
- condensation of water vapour, dust, icing.
Installation of intrinsic safety versions should be performed with particular care, in accordance
with the regulations and standards applicable to that type of installation .
The manufacturer reserves the right to make changes (not having a negative impact on the operational
and metrological parameters of the products) without updating the contents of the technical manual.
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.
i
Information particularly useful during installation and operation of the device.
Information particularly useful during installation and operation of a type Ex device.
Information on disposal of used equipment

E 1 DTR.PCE.PRE-28 (ENG)
CONTENTS
I. APPENDIX EX.02......................................................................................................................................... 2
II. APPENDIX EX.03........................................................................................................................................ 5
1. INTRODUCTION......................................................................................................................................... 7
2. USER MATERIALS..................................................................................................................................... 7
3. APPLICATIONS AND MAIN FEATURES.................................................................................................... 7
4. IDENTIFYING MARKS. ORDERING PROCEDURE .................................................................................... 8
5. TECHNICAL DATA..................................................................................................................................... 8
5.1. PCE–28. T ECHNICAL D ATA ..................................................................................................................... 8
5.1.1. PCE–28. M EASUREMENT R ANGES .......................................................................................................................8
5.1.2. PCE–28. M ETROLOGICAL P ARAMETERS ..............................................................................................................8
5.1.3. M ETROLOGICAL P ARAMETERS PCE-28 FOR PED VERSION ...................................................................................8
5.2. PRE–28. T ECHNICAL D ATA ..................................................................................................................... 8
5.2.1. PRE–28. M EASUREMENT R ANGES .......................................................................................................................8
5.2.2. PRE–28. M ETROLOGICAL P ARAMETERS ..............................................................................................................9
5.3. PCE-28, PRE-28.- C OMMON PARAMETERS ............................................................................................... 9
5.3.1. PCE–28, PRE–28 . E LECTRICAL P ARAMETERS ...................................................................................................9
5.3.2. PCE–28, PRE–28. P ERMITTED E NVIRONMENTAL C ONDITIONS .............................................................................9
5.3.2. PCE–28, PRE–28. C ONSTRUCTION M ATERIALS ..................................................................................................9
5.4. P RESSURE C ONNECTORS ........................................................................................................................10
5.4.1. PCE–28. P RESSURE C ONNECTORS ....................................................................................................................10
5.4.2. PRE–28. P RESSURE C ONNECTORS ....................................................................................................................10
5.5. PCE–28,PRE–28. E LECTRICAL C ONNECTORSAND I NGRESS P ROTECTION R ATING OF C ASE .................................10
6. CONSTRUCTION.......................................................................................................................................10
6.1. M EASUREMENT P RINCIPLES ....................................................................................................................10
6.2. C ONSTRUCTION ......................................................................................................................................10
6.3. C ASING , E LECTRICAL C ONNECTIONS ........................................................................................................10
7. PLACE OF INSTALLATION OF TRANSMITTERS.....................................................................................11
7.1. G ENERAL NOTE ......................................................................................................................................11
7.2. L OW A MBIENT T EMPERATURE .................................................................................................................11
7.3. H IGH M EDIUM T EMPERATURE ..................................................................................................................11
7.4. M ECHANICAL V IBRATION , C ORROSIVE M EDIA . ..........................................................................................11
8. INSTALLATION AND MECHANICAL CONNECTIONS..............................................................................12
9. ELECTRICAL CONNECTION ....................................................................................................................12
9.1. G ENERAL RECOMMENDATIONS .................................................................................................................12
9.2. C ONNECTIONS FOR TRANSMITTERS WITH PD- TYPE CONNECTOR ..................................................................13
9.3. C ONNECTIONS FOR TRANSMITTERS WITH PK OR PM12- TYPE CONNECTOR ...................................................13
9.4. C ONNECTIONS FOR TRANSMITTERS WITH TERMINAL BOX (PZ- TYPE CONNECTOR )..........................................13
9.5. P ROTECTION FROM EXCESS VOLTAGE .......................................................................................................13
9.6. E ARTHING ..............................................................................................................................................14
10. SETTING OF ZERO POSITION AND MEASUREMENT RANGE..............................................................14
11. SERVICES AND SPARE PARTS.............................................................................................................14
11.1. P ERIODIC SERVICE ................................................................................................................................14
11.2. U NSCHEDULED SERVICES ......................................................................................................................14
11.3. C LEANING THE D IAPHRAGM S EAL , O VERLOADING D AMAGE ......................................................................14
11.4. S PARE PARTS . .....................................................................................................................................14
12. PCE-28P LEVEL PROBES.......................................................................................................................15
12.1. A PPLICATIONS .....................................................................................................................................15
12.2. PCE–28P. T ECHNICAL D ATA ................................................................................................................15
12.3. P RINCIPLES OF O PERATION , C ONSTRUCTION ..........................................................................................15
12.4. P LACE AND METHOD OF INSTALLATION . F ITTING ......................................................................................15
12.5. E LECTRICAL CONNECTION . S ETTINGS .....................................................................................................15
12.6. E ARTHING ............................................................................................................................................16
13. PACKING, STORAGE AND TRANSPORT...............................................................................................16
14. GUARANTEE...........................................................................................................................................16
15. ADDITIONAL INFORMATION..................................................................................................................16
16. FIGURES .................................................................................................................................................16

E 2 DTR.PCE.PRE-28 (ENG)
I. APPENDIX Ex.02
DTR.PCE.PRE-28 (ENG)
Appendix Ex.02
PCE–28/XX/YY, PCE–28P/XX/YY PRESSURE TRANSMITTERS,
TYP PRE–28/XX/YY DIFFERENTIAL PRESSURE TRANSMITTER
Ex VERSIONS according to ATEX
1. Introduction
1.1. The “Appendix Ex.02” to DTR.PCE.PRE-28 (ENG ) applies to PCE-28/XX/YY, PCE-28P/XX/YY and and
PRE-28/XX/YY transmitters in Ex version according to ATEX, marked on the rating plate as shown in 2.2
and 3. and signed “Ex” in the Product Certificate, only.
1.2. The appendix contains supplementary information relating to the Ex version transmitters.
During installation and use of the Ex transmitters, reference should be made to DTR.PCE.PRE-28(ENG) in
conjunction with “Appendix Ex.02”.
2. Using of PCE–28/XX/YY, PCE–28P/XX/YY and PRE–28/XX/YY transmitters in
danger zones.
2.1. The PCE–28, PCE–28P and PRE–28 transmitters are produced in accordance with the requirements
of the following standards: EN 60079-0:2009, EN 50303:2000, EN 60079-26:2007, EN 60079-11:2007,
EN 61241-11:2006.
2.2. The transmitters may operate in areas where there is a risk of explosion, in accordance with the rating of
the explosion protection design:
II 1/2G Ex ia IIC T4/T5/T6 Ga/Gb
I M1 Ex ia I Ma
II 1D Ex ia IIIC T105°
°°
°C Da
KDB 08ATEX002X
3. Identifying marks
Intrinsically safe transmitters (Ex version) must have a rating plate containing the information specified in
paragraph 4 of DTR.PCE.PRE-28 (ENG) and also at least the following:
- CE mark and the notified unit number: 1453, mark
- designation of explosion protection design, certificate number
- values of parameters such as: Ui, Ii, Ci, Li
- type of electrical and process connectors
- manufacture year and serial number
4. User information.
Together with the transmitters, user will receive: User’s Manual signed DTR.PCE.PRE-28 (ENG)with the
Appendix Ex.02, and the Product Certificate.
5. Permissible input parameters (based on data from the KDB 08ATEX002X
certificates and certification documentation).
The transmitters should be powered via the associated power supplier and measurement devices
provided with the relevant intrinsic-safe certificates. The parameters of their outputs to the danger zone
should not exceed the limit power supply parameters specified below for the transmitters :
The pressure transmitter is an intrinsic safety apparatus with level of protection “ia”, when supply circuit
have level of protection “ia”.
- for power supply with a linear characteristic
Ui = 28V Ii = 0,1A
- for power supply with a “trapezial” and “rectangular” characteristic
Ui = 24V Ii = 0,08A
Input inductance and capacity: Ci = 40nF, Li = 0,9mH
Pi for all type of power supply - see Table 1
1453

E 3 DTR.PCE.PRE-28 (ENG)
Appendix Ex.02
Table 1
Pi [W] ∆
∆∆
∆ t [ °
°°
° C] Tp [ °
°°
° C] Temperature
classification Pi [W]
∆
∆∆
∆ t
[ °
°°
° C] Tp [
°
°°
° C] Temperature
classification
55 T6 65 T6
70 T5 80 T51.5 24.7 80 T4 and Group I 0.9 14.8 80 T4 and Group I
60 T6 70 T6
75 T5 0.6 9.9 80 T5, T4 and Group I1.2 19.7 80 T4 and Group I 1.5 24.7 80 for D
Tp – temperature of enclosure of mounted transmitter (for example at tank) without power supply, determined for
maximum ambient temperature
Special conditions for safe use:
- electrical installation of pressure transmitters shall comply with installation requirements of valid standard.
6. Supply examples.
6.1.- for power supply with a linear characteristic
Power supply with a “linear” characteristic may be e.g. a typical barrier with parameters
Uo=28V Io=0.093A Rw=300Ω .
Uo
Rw I D
Ui
Fig.1. Power supply from a source with “linear” characteristic
6.2. –for power supply with a trapezial characteristic
Supply parameters according to the certificate:
a) Uo=24V Io=0,08A Po=1,2W
b) Uo=24V Io=0.05A Po=0,6W
Example of power supply from a source with trapezial characteristic (see Fig.2).
Io
Ui Uo
D
IRw
Uq
Ii
Fig.2. Power supply from a source with trapezial characteristic”
If Uo ≤ ½ Uq then parameters Uq, Io, Po are interrelated as follows:
Uq = , Rw = , Po =
6.3. -for power supply with rectangular characteristic
Fig.3. Power supply from a source with rectangular characteristic
transmitter
Uq
Io Uo(Uq–Uo)
Rw
4Pi
Io
transmitter
U
Uo
Io I
Uo
Io
transmitter
Ui

E 4 DTR.PCE.PRE-28 (ENG)
Appendix Ex.02
Uo=24V Io=0,05A Po=1.2W
The supply of power from a source with a rectangular characteristic means that the voltage of the Ex power
supply remains constant until current limitation activates.
The protection level of power supplies with a rectangular characteristic is normally “ib”.
The transmitter powered from a such supply is also the Ex device with “ib” level protection.
Example of practical provision of power supply with a rectangular characteristic:
– use a stabilized power supply with Uo=24V, with the “ib” level protection and current limited to Io=50mA.
Such current limit ensures that the power Pi not be exceeded (0,05A x24V = 1,2W)
and the powering of two transmitters simultaneously .
7. How to connect Ex transmitters: PCE–28, PCE–28P and PRE–28
The transmitter and other devices in the measuring loop should be connected in accordance with
the intrinsic-safety and explosion-safety regulations and the conditions for use in dangerous
areas.
Failure to observe the intrinsic-safety regulations can cause explosion and the resulting hazard to
people.
of the box correspond to terminals 1, 2 of the PD connector.
external
Earthing terminal
Earthing terminal
PZ connector (terminal box), terminals 1, 2
Span- setting of span
Zero- setting of zero
Earthing terminal
Hazardous area
PD electrical connector
DIN 43650
6÷10 mm
PG-11 packing gland
∅
−−
see p.5 and 6.
a Ex power supply
3
2
+
1
28V DC
max.
+
internal
Safe area
in such areas.
are permitted to be used
only instruments which
terminals must be made using
M20x1,5
kabel ∅ 5÷ 10 ∅
Terminal 1: "+" (plus)
Terminal 2: "-" (minus)
the signalling circuit disconnecting,
To measure the current
in the transmitter without
to control sockets 2 and 3.
connections to the control
connect a milliammeter
In hazardous areas,
packing gland
+
_
L
∅2
In version Ex: use lead-sealant
PK cable connector, IP67 rated
capillary x0,5
green - cable shield
red (correspond to terminals "1")
black (correspond to terminals "2")
It is not allowed to repair or otherwise interfere with the transmitter’s electrical circuits in any
way.
Damage and possible repair can be assessed and done by the manufactures or another
authorized party only.

E 5 DTR.PCE.PRE-28 (ENG)
II. APPENDIX Ex.03
DTR.PCE.PRE-28 (ENG)
Appendix Ex.03
PCE–28/XX/YY, PCE–28P/XX/YY PRESSURE TRANSMITTERS,
TYP PRE–28/XX/YY DIFFERENTIAL PRESSURE TRANSMITTER
Ex VERSIONS according to IECEx
1. Introduction
1.1. The “Appendix Ex.03” to DTR.PCE.PRE-28(ENG) applies to PCE-28/XX/YY, PCE-28P/XX/YY and and
PRE-28/XX/YY transmitters in Ex version according to IECEx, marked on the rating plate as shown in 2.2
and 3. and signed “Ex” in the Product Certificate, only.
1.2. The appendix contains supplementary information relating to the Ex version transmitters.
During installation and use of the Ex transmitters, reference should be made to DTR.PCE.PRE-28 (ENG ) in
conjunction with “Appendix Ex.03”.
2. Using of PCE–28/XX/YY, PCE–28P/XX/YY and PRE–28/XX/YY transmitters in
danger zones.
2.1. The transmitters are produced in accordance with the requirements of the following standards:
IEC 60079-0:2007-10, IEC 60079-26:2006, IEC 60079-11:2006.
2.2. The transmitters may operate in areas where there is a risk of explosion, in accordance with the rating of
the explosion protection design:
Ex ia IIC T4...T6, Ga/Gb
Ex ia I Ma
IECEx FTZÚ 09.0001
3. Identifying marks
Intrinsically safe transmitters (Ex version) must have a rating plate containing the information specified in
paragraph 4 of DTR.PCE.PRE-28 (ENG )and also at least the following :
−values of parameters such as: Ui, Ii, Ci, Li,
−manufacture year.
4. USER MATERIALS.
Together with the ordered transmitters, the user will receive:
a) Product Certificate
b) Declaration of conformity – on request,
c) Copy of certificate – on request,
d) „User’s Manual numbered „DTR.PCE.PRE-28 (ENG )” Appendix Ex.03.
User can find them at www.aplisens.pl
5. Permissible input parameters (based on data from the IECEx FTZÚ 09.0001
certificate).
The transmitters should be powered via the associated power supplier and measurement devices
provided with the relevant intrinsic-safe certificates. The parameters of their outputs to the danger zone
should not exceed the limit power supply parameters specified below for the transmitters.
Permissible input parameters for power supply with a linear characteristic
Ui=28V Ii=0,1A
for power supply with a “trapezial” and “rectangular” characteristic
Ui = 28V Ii = 0, 08A
Input inductance and capacity: Ci = 40nF, Li = 0,9mH
Pi = ... see the Table
Ta = -40
° C to ... see the Table

E 6 DTR.PCE.PRE-28 (ENG)
Appendix Ex.03
Temperature classification Ta [ ° C] Pi [W]
T4 and Group I 80 1.2
T6 60 1.2
T5 70 1.5
T5 80 0.9
6. Supply examples
6.1. - for power supply with a linear characteristic
Power supply with a “linear” characteristic may be e.g. a typical barrier with parameters
Uo=28V Io=0.093A Rw=300Ω.
Fig.1. Power supply from a source with “linear” characteristic
6.2. –for power supply with a trapezial characteristic
Supply parameters according to the certificate:
a). Uo=24V Io=0,08A Po = 1,2W for Ta ≤ 60 ° C and T6 or Ta ≤ 70 ° C and T5
b). Uo=24V Io=0,05A Po = 0,6W for Ta ≤ 80 ° C and T5
Fig.2. Power supply from a source with trapezial characteristic”
If Uo ≤½ U Q then parameters U Q , Io, Po are interrelated as follows
U Q = , Rw = , Po =
6.3. -for power supply with rectangular characteristic
Power supply parameters, examples:
a). Uo = 24V Io = 0,05A Po = 1,2W for Ta ≤ 60 ° C and T6 or Ta ≤ 70 ° C and T5,
b). Uo = 24V Io = 0,025A Po = 0,6W for Ta ≤ 80 ° C and T5,
The supply of power from a source with a rectangular characteristic means that the voltage of the Ex
power supply remains constant until current limitation activates
The protection level of power supplies with a rectangular characteristic is normally “ib”.
The transmitter powered from a such supply is also the Ex device with “ib” level protection
Example of practical provision of power supply with a rectangular characteristic:
– use a stabilized power supply with Uo=24V, with the “ib” level protection and current limited to Io=50mA or Io =
25mA.
7. How to connect Ex transmitters Ex: PC–28/XX/YY,PCE–28/XX/YY,
PC–28P/XX/YY, PCE–28P/XX/YY,
PR–28/XX/YY, PRE–28/XX/YY
- acc. to p.7 DTR.PCE.PRE-28 (ENG ). Appendix Ex.02
U
Q
Io
4Po
Io
Uo(U
Q
-
Uo)
Rw`
Rw
transmitter
Ui
Io
Uo U
Q
transmitter
Ui
Rw Io
Uo
I D

E 7 DTR.PCE.PRE-28 (ENG)
1. INTRODUCTION
1.1. This user’s manual is intended for PCE–28 electronic pressure transmitters, PRE–28 differential pressure
transmitters and PCE–28P level probes users. Containing the data and guidelines necessary to understand the
functioning of the transmitters and how to operate them. It includes essential recommendations concerning
installation and use, as well as emergency procedures.
1.2. Complementary technical data for the PCE–28 and PRE–28 transmitters with diaphragm seal connectors and
technical data for seals are contained in the catalogue cards “DIAPHRAGM SEALS”.
1.3. The transmitters comply with the requirements of EU directives as shown on the plate and with
the relevant Declaration of Conformity.
1.4. Additional data on PCE-28, PRE-28 transmitters and PCE-28P probes in Ex versions covered by
the common EC-type test certificate KDB 04ATE002X are contained in the appendix designated
DTR.PCE.PRE-28 (ENG). Appendix Ex.02.
During installation and use of PCE-28, PRE-28 transmitters and PCE-28P probes in Ex version,
reference should be made to DTR.PCE.PRE-28 (ENG) in conjunction with Appendix Ex.02
1.5. The pressure transmitters: PCE-28, PCE-28P, PRE-28 in realization for sea uses are complied with Det
Norske Veritas (DNV) Rules for Classification of Ships, High Speed & Light Craft and Det Norske Veritas'
Offshore Standards. Certificate No. A -11308 for application in following Location Classes: Temperature C,
Humidity: B, Vibrations: B, EMC: B, Enclosure: C. The pressure transmitters: PCE-28, PCE-28P, PRE-28 in
realization for sea uses are complied with Det Norske Veritas (DNV) Rules for Classification of Ships, High Speed
& Light Craft and Det Norske Veritas' Offshore Standards. Certificate No. A -11308 for application in following
Location Classes: Temperature C, Humidity: B, Vibrations: B, EMC: B, Enclosure: C.
1.6. The PCE-28, PRE-28 transmitters are also made in a complies with the PED pressure version , meet the
requirements for category IV, and then carry markings as in 4.3.
The agreement of transmitters with the PED directive confirm the certificates::
CE-PED- H1D-APL 001-04-POL revA, CE-PED- H1-APL 001-11-POL (module H1D+H1)
CE-PED-B-APL 001-09-POL, CE-PED-D-APL 001-09-POL (module B+D)
2. USER MATERIALS
Transmitters are delivered in single and/or multiple packs.
A transmitter is delivered together with a “Product Certificate” which is as a guarantee card also.
A batch of transmitters is supplied together with the User’s Manual.
At the customer’s request, a “Declaration of Compliance” and/or Certificate will be supplied.
(These documents are also published at the www.aplisens.pl )
3. APPLICATIONS AND MAIN FEATURES
3.1. The PCE-28 pressure transmitters are designed to measure gauge pressure, vacuum pressure and absolute
pressure of gases, vapours and liquids (including corrosive).
3.2. PRE–28 differential pressure transmitters are used to measure liquid levels in closed tanks, and to measure
differential pressure at filters, orifices and others.
PRE–28 differential pressure transmitters with P-type connectors are designed to work with static pressure of up
to 4MPa only (see fig.7).
PRE–28 differential pressure transmitters with C-type vented connectors to mount together with a valve manifold
are designed to work with static pressure of up to 16MPa (see fig.8).
3.3. The PCE-28 can be fitted with a range of additional process connectors, enabling them to be used in a
conditions variety, such as dense media, reactive media, high and low temperature etc.
Data on these connectors can be found in the catalogue cards “DIAPHRAGM SEALS”.
To measure a medium which contains suspensions or impurities, or is viscous, hot, corrosive etc., use
the PRE–28 transmitter with a single diaphragm seal, or an APRE–2000 smart differential pressure
transmitter with a single diaphragm seal or an APRE-2200 with a two diaphragm seals.
3.4. For depth measurements in open tanks, the transmitters are fitted with sensing modules with an extension
tube, and are referred to as the PCE-28P level probes (for details see Section 12).
3.5. The PCE-28 or PRE-28 transmitters and the PCE-28P probes generate a 4...20mA signal using two-wire
transmission, other PCE-28 and PRE-28solution can be produced with 0…20mA or 0...10V signal using three-
wire transmission.
i

E 8 DTR.PCE.PRE-28 (ENG)
4. IDENTIFYING MARKS. ORDERING PROCEDURE
4.1. Every transmitter and probe carries a rating plate containing at least the following information: CE mark,
notified institutions numbers and certificates obtained designations, manufacturer name, type, serial number,
measurement range, output signal, power supply voltage.
4.2. PCE-28, PRE-28 and PCE-28P transmitters in Ex version, in accordance with the ATEX directive,
have additional marks as described in DTR.PCE.PRE-28(ENG) Appendix Ex.02 paragraph 3.
4.3. PCE-28, PRE-28 and PCE-28P transmitters in Ex version, in accordance with the IECEx directive,
have additional marks as described in DTR.PCE.PRE-28(ENG) Appendix Ex.03 paragraph 3
4.4. The rating plates of transmitters of type PCE-28, in versions compliant with the PED pressure
directive contain the notified unit number 0062 next to the CE mark.
On the rating plate can be given a sign of PED certificate.
4.4. The designations to be used when ordering can be found in the Catalogue Cards.
5. TECHNICAL DATA
5.1. PCE–28. Technical Data
5.1.1. PCE–28. Measurement Ranges
The PCE-28 transmitter can be produced with any desired range in the interval:
0...10mbar÷0...1000bar (over pressure, under pressure)
400mbar ÷ 80bar (absolute pressure).
Recommended standard ranges:
over, under pressure (0÷ -1; -0,4; -0,1; 0,1; 0,4; 1; 2,5; 6; 10; 16; 25; 60; 160; 250; 400, 600, 1000) bar
absolute pressure (0 ÷ 0,4; 1; 2,5 6; 10; 16; 25; 60)bar
5.1.2. PCE–28. Metrological Parameters
Measurement Range
Table 1 100mbar (10kPa) 400mbar (40kPa) 0...1 ÷ 1000bar (0...100kPa ÷ 100MPa)
Overpressure limit
(repeatable, no hysteresis) 1bar (100kPa) 2,5bar (250kPa) 4 x range
max 1200bar (120MPa)
Damaging overpressure 2bar (200kPa) 5bar (500kPa) 8 x range, max 2000bar (200MPa)
Accuracy 0,3% 0,2% (0,16 %- special version)
Thermal error
typically 0,3% / 10º C; max 0,4% /10º C typically 0,2% /10º C; max 0,3% /10º C
Long term stability 0,2 % / year 0,1 % / year
Hysteresis and repeatability 0,05%
5.1.3. Metrological Parameters PCE-28 for PED version.
PCE-28 transmitters, in the PED pressure directive versions, are produced with a measurement range in the
interval from –1 bar to 400bar gage, or from 0 to 400 bar absolute, with the overpressure up to 440bar.
Ambient temperature limit -40 ÷ 100°C (modules H1D+H1)
-40 ÷ 150ºC (modules H1D+H1) for transmitters with diaphragm seal S-Mazut
-25 ÷ 70ºC (modules B+D)
PCE-28 transmitters with the S-Mazut seal pressure connection, assembled with the PED version can be
produced within the range –1bar to 100 bar gage, or within the 0 - 100bar absolute, and the overpressure
up to 110bar. Other parameters are as given in Tables 1, except that the ambient temperature error is
7mbar/10ºC. The value of the pressure measurement range and related overpressure are given on rating
plate and at Product Certificate.
5.2. PRE–28. Technical Data
5.2.1. PRE–28. Measurement Ranges
The PRE–28 differential pressure transmitters are manufactured with any desired range in the interval
1,6mbar to 25 bar.
Recommended ranges: 0,4; 1; 2,5; 6; 10; 16; 25bar
(-0,1...0,1); (-1...1) bar
i
i

E 9 DTR.PCE.PRE-28 (ENG)
5.2.2. PRE–28. Metrological Parameters
Measurement Ranges
Table 2 100mbar
(10kPa) 1bar (100kPa) 2bar (200kPa) 25bar (2500kPa)
Overpressure limit
Static pressure limit 250bar (25MPa) [40bar (4MPa) for P-type connector]
Accuracy 0,4% 0,25%
Thermal error / 10 ° Ctypical 0,3%,
max 0,4% typical 0,2%, max 0,3%
Zero shift error for static pressure * 0,1% / 1MPa
Hysteresis and repeatability 0,05%
*- This error can be eliminated by zeroing the transmitter in static pressure conditions with zero differential pressure.
5.3. PCE-28, PRE-28.- Common parameters
5.3.1. PCE–28, PRE–28 . Electrical Parameters
Power supply for non-intrinsic-safe versions 10,5 ÷ 36V DC, rated 24V DC (for output signal 4 ÷ 20mA)
15 ÷ 30V DC- (for output signal 0÷10V, 0÷20mA)
Power supply for intrinsic-safe versions in accordance with Appendix Ex.02 or Appendix Ex.03.
Output signal 4 ÷ 20mA two-wire transmission
0 ÷ 10 V three-wire transmission
0 ÷ 20 mA three-wire transmission
Load resistance
(for output signal 4÷20mA)
Load resistance
(for output signal 0 ÷ 10V) R ≥5kΩ
Error due to supply voltage changes 0,005 %/V
Voltage for insulation strength testing 500 VAC or 750 VDC, see p.9.5.
Excess voltage protection see p.9.5.
5.3.2. PCE–28, PRE–28. Permitted Environmental Conditions
Ambient temperature limit -40 ÷ 80°C (for PCE-28)
Ambient temperature limit -25°C ÷ 80°C (for PRE-28)
(Operating temperature range for intrinsic-safe versions in accordance
with Appendix Ex.02 or Appendix Ex.03
Process temperature limit -40 ÷ 120°C – direct measurement,
over 120ºC, only with the use of a diaphragm seal, radiator,
looped siphon tube or impulse line.
Thermal compensation range -10 ÷ 80ºC (for PCE-28) or by arrangement
Thermal compensation range 0 ÷ 70ºC (for PRE-28) or by arrangement
Relative humidity 0 ÷ 98%
Vibration during operation max 4g
Exposure to direct sunlight not recommended causing strong transmitter warming
5.3.2. PCE–28, PRE–28. Construction Materials
Diaphragm Stainless steel 316L (00H17N14M2)
Sensing module Stainless steel 316L (00H17N14M2)
Casing for electronic parts Steel pipe, 304 (0H18N9)
PZ-type terminal box Thick steel pipe, 304 (0H18N9)
Angular connector, DIN 43650, PD type Itamide
Liquid filling the interior of the sensing module Silicone oil, chemically inactive liquid for measurement of
oxygen.
Cable shield in PK connector Polyurethane, special version – teflon
R[Ω] =
Usup.[V] – 10,5V
0,02A

E 10 DTR.PCE.PRE-28 (ENG)
5.4. Pressure Connectors
5.4.1. PCE–28. Pressure Connectors
M-type connector with M20x1.5 thread – see figure 3a
P-type connector with M20x1.5 thread – see figure 4a.
CM30x2 or CM20x1.5-type connector with flush diaphragm – see figure 5a.
RM-type connector with M20x1.5 thread and radiator.
G1/2 -type connector with G1/2” thread – see figure 6a
GP -type connector with G1/2” thread
CG1/2 -type connector with G1/2” thread and flush diaphragm – see figure 6c
CG1-type connector with G1” thread and flush diaphragm – see figure 6e
1/2"NPT-type connector with 1/2"NPT tread (male) and with internal G1/4” tread (female), available for PED version.
other connection types by arrangement
5.4.2. PRE–28. Pressure Connectors
P-type connectors with M20x1.5 thread – see fig. 7.
C-type connector to mount together with a valve manifold see fig. 8.
Diaphragm seal connectors: see the “Information Cards” for the diaphragm seals
5.5. PCE–28, PRE–28. Electrical Connectors and Ingress Protection Rating of Case
PCE-28, PRE-28 with PD-type connector, DIN 43650, PG-11 packing gland. IP65 rated (PN-EN 60529:2003)
PCE-28, PRE-28 with PZ-type terminal box, M20x1,5 packing gland. IP66 rated (PN-EN 60529:2003)
PCE-28, PRE-28, PCE-28P with PK-type cable connector. IP67 rated (PN-EN 60529:2003)
PCE-28 with PM12-type connector. IP67 rated (PN-EN 60529:2003)
6. CONSTRUCTION
6.1. Measurement Principles
The PCE-28, pressure transmitters, PRE-28 differential pressure transmitters and the PCE-28P level probes
operate by converting changes in the piezoresistive bridge, which are proportional to the measured pressure, into
a standard current or voltage output signal.
The active sensing device is a silicon diaphragm with diffused piezoresistors, separated from the medium by an
isolating diaphragm and manometric oil.
6.2. Construction
The basic component of the transmitter and probe is the sensing module, in which the input pressure is converted
into a electrical signal. The sensing modules are fitted with pressure-transmitting connectors (see p. 5.4). The
second element of the transmitter is an electronic unit which amplifies and standardizes the output signal. This is
fitted with potentiometers which can be used to set the zero and the range positions.
For the measurement of dense, chemically reactive, or high-temperature media, the transmitters are fitted
additionally with various types of diaphragm seal connectors, depending on the type of medium and
environmental conditions (details can be found in the catalogue cards “DIAPHRAGM SEALS”).
6.3. Casing, Electrical Connections
6.3.1. The casing of the PCE-28 and PRE-28 transmitters, made from ø27 pipe, is permanently mounted on the
sensing module as shown in figure 1b and 7. On the other side is a PD type electrical connector with PG-11
packing gland. By unscrewing and removing the connector, can be gained access to the potentiometers used to
the zero and range setting.
6.3.2. The PCE-28, PRE-28 transmitters may be fitted with a PK cable connector (see figure 1c) or PM12 (PCE-
28 only) (see figure 1f), mounted similarly to the PD connector. The body of the connector contains a
permanently fixed and sealed cable of standard length 3m (other lengths can be produced to order). The cable
contains a capillary which connects one side of the measuring diaphragm to the atmosphere.
6.3.3. The PCE-28, PRE-28 transmitters with a PZ type connector has a terminal box permanently mounted on
the upper part of the casing (figure 2). The box is closed with a lid. Mounted, on the inside, a terminal block
equipped is with additional control terminals, connected to 1, 2 and 3 terminals.
PZ type connector has an internal, and in Ex version also external earthing terminal.

E 11 DTR.PCE.PRE-28 (ENG)
7. PLACE OF INSTALLATION OF TRANSMITTERS
7.1. General note
7.1.1. The PCE-28 transmitters can be installed both indoors and outdoors. It is recommended that transmitters
intended for outdoor use be placed in a box or under cover.
There is no need for a cover in the case of transmitters with PZ and PK type connectors.
7.1.2. The place of installation should be chosen in such a way as to allow access to the device and to protect it
from mechanical damage. In planning the installation of the transmitter and configuration of the impulse lines,
attention should be paid to the following requirements:
- The impulse lines should be as short as possible, with a sufficiently large cross-section, and free of
sharp bends, in order to prevent blockages;
- Where the medium is a gas, the transmitters should be installed above the measuring point, so that
condensation flows down towards the site of the pressure measurement; where the medium is a liquid
or where a protective liquid is used, the transmitters should be installed below the place where the
pressure measurement is taken;
- The impulse lines should be inclined at a gradient of at least 10cm/m;
- The levels of filling liquid in the impulse lines should be equal or kept constant difference,
- The configuration of the impulse lines and the valve connection system should be chosen with regard to
the measurement conditions and to requirements such as the need to reset the transmitters in position
and the need for access to the impulse lines during water or gas removal and flushing.
7.1.3. Where there is a risk of heavy objects hitting the instrument (resulting, in extreme cases, in
a part of the system with transducers being torn off and medium leakage), appropriate means of
protection should be applied for safety reasons and to avoid the possibility of sparkling or other,
more appropriate location should be selected for the transmitter .
7.2. Low Ambient Temperature
When the solidification point of the liquid whose pressure is being measured is greater than the
ambient temperature, steps should be taken to protect the measurement apparatus from freezing
effects.
This is particularly important in the case open-air installations.
Protection by filling the impulse lines with a ethylene glycol and water mixture, or another liquid whose
solidification point does not exceed the ambient temperature is obtained. The transmitter case and lines
thermal insulation protects from short exposure to low temperatures only. Where the temperature is very
low, the transmitter and impulse lines should be heated.
7.3. High Medium Temperature.
The PCE-28 and PRE-28 transmitters may be used to measure media with temperatures of up to 120°C.
To protect the sensing module from temperatures in excess of 120ºC, suitably long impulse lines are used to
disperse the heat and to lower the temperature of the module.
Where it is not possible to use impulse lines of the required length, PCE-28 transmitters with remote diaphragm
seals should be used (see catalogue cards “DIAPHRAGM SEALS”).
Data as per Appendix Ex.02 or Appendix Ex.03 apply for the Ex version.
7.4. Mechanical Vibration, Corrosive Media.
7.4.1. Transmitters should correctly work with vibrations with amplitudes to 1,6 mm and accelerations to 4g.
If strong vibrations are carried via the pressure line and disturb of measuring, use should be made of elastic pulse
lines or transmitters with a remote diaphragm seal.
7.4.2. Transmitters should not be installed in places where the diaphragm, made of 316L steel
(00H17N14M2), would be subject to corrosion by the medium being measured
If possible, transmitters with diaphragms made of Hastelloy C276 should be used, or other means of
protection applied (e.g. in the form of a separating liquid) or transmitters with diaphragm seals adapted for
measuring aggressive mediums according to catalogue cards “DIAPHRAGM SEALS”) should be used.
i

E 12 DTR.PCE.PRE-28 (ENG)
8. INSTALLATION AND MECHANICAL CONNECTIONS
8.1. The PCE-28 transmitters can be mounted directly on rigid impulse lines.
Where connectors are used as in figures 3a, 4a, 5a, 6a, 6c, 6e it is recommended that connection sockets be
used as shown in figure.3b, 4b, 5b, 6b or 5c, 6d, 6f.
Where the connectors are as in figures 4a, 5a and 6c, 6e rectangular gaskets are used with each transmitter.
The socket shown as in figure 5c, 6d and 6f can be obtained from the manufacturer.
The material of the seal is selected based on the pressure value and the type and temperature of the medium.
If the pressure is applied via a flexible plastic tube, the transmitter should be mounted on a support with Red Ø6-
M reduction.
In case of metal pipes, the used connections should comply with PN-82/M-42306.
The types of the impulse tubes are to be selected depending on the measured value of the pressure and the
medium temperature.
8.2. The PRE–28 transmitters can be mounted directly on rigid impulse lines.
To connect the basic versions of transmitters, with two M20 x 1.5 stubs (P-type connector), one can use
(for example) straight connecting elements with nuts.
If the pressure is carried via a flexible plastic tube, use an reduction elements “Red Ø6-M” (M20x1,5 / Ø6).
The PRE–28 transmitters can be installed using the Assembly Kit, on a ø25 pipe or on a flat surface using an
angle bracket (figure 11).
The PRE–28 with connecting cover (C-type connector) are designed for installation on 3-valve or 5-valve
manifolds, to a 2” pipe or to a flat surface using an fastener C2 (figure 12) or “U” (figure 13). .
8.3. The PCE-28 and PRE-28 transmitters can operate in any position.
When installed on an object with a high-temperature medium, it is advantageous to mount the transmitter in a
horizontal position with the packing gland pointing downwards or to the side, in such a way that the transmitter is
kept away from the stream of rising hot air.
Examples of the use of Aplisens assembly components to isolate the PCE-28 transmitters from high temperature
media are shown in figure 14.
When the measurement range is small, the reading can be affected by the position of the transmitter and by the
configuration of the impulse lines and the way in which they are filled with liquid.
This error can be corrected using the zero-setting function.
8.4. In selecting assembly components, it may be helpful to consult information on Aplisens connection elements,
reduction elements, sockets, valves, reduction clamps and signal tubes.
Information on this subject can be found in the catalogue cards “FITTING ACCESSORIES”.
Pressure may be transmitted to the installed device only after checking that it has a measurement
range which properly corresponds to the value of the measured pressure, that gaskets have been
properly selected and fitted, and the connector has been properly screwed tight.
Attempts to undo the screws or fixing connector pipes on a transmitter under pressure may cause
the medium to leak and create hazards for the personnel.
When disassembling the transmitter, it is necessary to disconnect it from the process pressure or
bring the pressure to atmospheric level, and to take particular care and precautions in case of
media which are highly reactive, caustic, explosive or otherwise hazardous to personnel.
If necessary, rinse out this part of the system.
Transmitters with flange diaphragm seals are to be installed on the corresponding counter flanges on the
facility.
It is recommended that the user matches the screw joints material to the pressure, temperature, flange
material and seal to ensure tightness of the flange joint in the expected operating conditions.
Coarse-threaded screws complying with ISO 261 are to be used for flanges used in the transmitters.
Additional data concerning the diaphragm seals are specified in the catalogue cards “DIAPHRAGM SEALS”.
9. ELECTRICAL CONNECTION
9.1. General recommendations
It is recommended that twisted pair cabling be used for the signal lines. If the transmitter and signal line are
subject to a large amount of electromagnetic interference, then screened twisted pair cable should be used.
The signal wires should not run alongside network power supply cables or near to large electrically-powered
devices.
i

E 13 DTR.PCE.PRE-28 (ENG)
The devices used together with the transmitters should be resistant to electromagnetic interference from the
transmission line in accordance with compatibility requirements.
It is also beneficial to use anti-interference filters on the primary side of the transformers, the power supplies used
for the transmitters and apparatus used in conjunction with them.
9.2. Connections for transmitters with PD-type connector.
The PCE-28 and PRE-28 transmitter and PCE-28P probe fitted with PD type connectors are to be connected as
shown in diag.1a.
To make the connections, remove the terminal block from the contact pins together with its cover.
Then remove the block from its cover, levering it off with the end of a screwdriver inserted into the slot provided
for this purpose. Connect the wires to the block.
Where the isolation of the wires in the packing gland is ineffective (for example, when single wires are
used) the opening of the gland should be carefully sealed with an elastic sealing compound to obtain IP65
ingress protection. It is useful to form the segment of the signal wire leading to the PG-11 packing gland
into a protective loop to prevent condensation from running down in the direction of the gland.
9.3. Connections for transmitters with PK or PM12-type connector.
The PCE-28 and PRE-28 transmitter with PK connector or PCE-28 transmitter with PM12 connector should be
connected via a terminal box, in which the transmitter’s cable is joined to the remainder of the signal line.
The terminal box must not be completely airtight, as the transmitter must be able to “breathe” through a capillary
in the connector cable.
9.4. Connections for transmitters with terminal box (PZ-type connector ).
The PCE-28 and PRE-28 transmitters with PZ-type connectors should be connected by linking the signal wires to a
terminal block, as shown in figure 2. Carefully screw in the cover and cork of the packing gland, making sure that the
wire is tightly packed.
9.5. Protection from excess voltage
9.5.1. The transmitters and probes may be in danger from excess voltage caused by connection faults or
atmospheric electrical discharge.
Protection from excess voltage between the wires of the transmission line is provided by TVS diodes installed in
all types of transmitter (see the table, column 2).
9.5.2. In order to protect against excess voltage between the transmission line and the casing or earth (not
prevented by the diodes connected between the transmission wires), additional protection is provided in the form
of plasma surge arresters (see the table, column 3).
Also external protective devices may be used, e.g. the UZ-2 Aplisens system, or others. When the transmission
lines are long, it is advantageous to use one protective device near the transmitter (or inside it), and another near
entry points to devices used in conjunction with it.
Internal protection of transmitters and probes:
Table 3 1 2 3
Type of transmitter (probe) and
type of electrical connector Protection between wires (TVS
diodes) – permitted voltage
Protection between wires and
earth and/or casing – type of
protection, permitted voltage
1PCE-28, PRE-28 with PZ
connector 39V DC Plasma surge arresters - 100VDC
2PCE-28 with PD, PK or PM12
connector 39V DC Installed by arrangement
3PCE-28P with PD, PK connector 39V DC Installed by arrangement
4 PRE-28 with PD connector 39V DC Installed by arrangement
9.5.3. The voltage in the protective elements must not exceed the maximum permitted values given in columns 2
and 3 of the table.
The insulation test voltages (500V AC or 750V DC) given in 5.1.1 refer to transmitters plasma surge
arresters - such protection is not used in Ex versions of transmitters .
i
i

E 14 DTR.PCE.PRE-28 (ENG)
9.6. Earthing
The methods of earthing the transmitters are shown in figures 1a, 2.
If the transmitter has, via a connector, a reliable galvanic connection with a properly earthed metal pipe or tank,
additional earthing is not necessary .
10. SETTING OF ZERO POSITION AND MEASUREMENT RANGE
The transmitter is factory regulated for the measurement range stated in the order.
After it has been installed, it may become necessary for the zero position to be changed
The way of gaining access to the control knob is described in 6.3.
To perform the regulation, connect and power the transmitter in accordance with its technical parameters.
Supply a pressure equal to the lower limit of the measurement range, and make the output signal equal to 4mA
(0mA, 0V) by turning the “zero” potentiometer. Turn the knob to the right to increase the output signal.
After the zero position has been set, supply a pressure equal to the upper limit of the range, and use the “range”
potentiometer to make the output current (voltage) equal to 20mA (10V).
Recheck the zero position, and repeat the procedure if necessary.
Potentiometers can be used to shift the zero position and the range by up to 10%, without altering the setting.
The PCE-28 and PRE-28 transmitters with output signal 0 ÷ 10V not attain precisely 0V position.
11. SERVICES AND SPARE PARTS.
11.1. Periodic service
Periodic service should be made in accordance with the regulations to which the user is subject.
During inspection, the pressure connectors should be checked for loose connections and leaks, the electrical
connectors should be checked with regard to tightness and the state of the gaskets, and the diaphragm seals
should be checked for tarnishing and corrosion. The conversion curve should also be verified.
11.2. Unscheduled services
If the transmitters or probes are installed in a location where they may be exposed to mechanical damage,
excess pressure, hydraulic impulses or excess voltage, or the diaphragm may be in danger from
sedimentation, crystallization or erosion, inspections should be carried out as required.
The diaphragm should be inspected and cleaned, the protective diodes should be checked for shorting,
and the conversion curve should be verified.
Where it is found that the signal in the transmission line is absent or its value is incorrect, a check should
be made on the line and its terminal connections. Check whether the values of the supply voltage and load
resistance are correct. If the line is in order, check the operation of the transmitter.
After checks have been made, take steps to eliminate the faults detected.
11.3. Cleaning the Diaphragm Seal, Overloading Damage
11.3.1. Sediment and dirt which have formed on the diaphragm in the course of operation must not be removed
by mechanical means, as this may damage both the diaphragm and the transmitter itself.
The only permitted method is the dissolving of sediment.
11.3.2. Sometimes transmitters malfunction due to damage caused by overloading, e.g. in case of:
- application of excessive pressure;
- freezing or solidification of the medium;
- action of a hard object, such as a screwdriver, on the diaphragm .
Usually in such cases the symptoms are such that the output current falls below 4mA or rises above 20mA, and
the transmitter fails to respond to input pressure .
11.4. Spare parts.
The following transmitter parts may need replacing due to damage or normal wear:
PD connector – terminal block with angular cover and seal, connector base with seal, rating plate, case.
PK connector – the entire connector.
PZ connector – cover seal and packing gland.
i
i
i

E 15 DTR.PCE.PRE-28 (ENG)
In the Ex version, the user may replace only the terminal block with angular shield and the seal in the PD
connector, or the seal and packing gland in the PZ connector.
Other parts, due to their special characteristics and anti-explosive requirements, may be replaced
only by the manufacturer or an authorized firm
12. PCE-28P LEVEL PROBES
12.1. Applications
The PCE-28P level probes are designed to measure the depth of medium in a tank which is accessible from the
top. They can also be used to measure levels in open tanks, watercourses, canals, measurement pipes of open
channels, to measure levels of liquid waste etc.
The PCE-28P probes have PZH certificates and can be used with food products.
12.2. PCE–28P. Technical Data
12.2.1 . The PCE-28P probes are manufactured with measurement ranges in the interval 200÷3000mm H
2
O.
12.2.2 . PCE–28P. Metrological Parameters Measurement range
0...200÷500mm H
2
O 0...700÷3000mm H
2
O
Accuracy 0,25% 0,16%
Thermal error of zero typically0,3%/10°C, max 0,5%/10°C typically 0,2%/1 0°C, max 0,3%/10°C
Thermal error of span typically 0,2%/10°C
max 0,3%/10°C typically 0,2%/10°C max 0,3%/10°C
Hysteresis, repeatability 0,05%
12.2.3 .PCE-28P electrical parameters see p. 5.5.
12.2.4 .PCE-28P permitted environmental and operating conditions:
Thermal compensation range 0÷25°C – standard
-10÷70 - special version
Medium temperature -25÷80°C
Other parameters as given in 5.3. and 5.4.
12.3. Principles of Operation, Construction
The PCE-28P level probes work by converting the pressure of a column of liquid into a standard electrical signal.
The PCE-28P generate 4 ÷ 20mA output signals with two-wire transmission, although a special version can
produce 0 ÷ 20mA or 0 ÷ 10V signals with three-wire transmission.
The probe consists of a sensing module and an electronic assembly, connected with an extension tube whose
length depends on the depth being measured. The tube can be fitted with a flange for mounting on the cover of
the tank (figure 8). The PCE-28P probe can be fitted with PD and PK type connectors, (the connectors are shown
on figures 1b, 1c, 9).
12.4. Place and method of installation. Fitting
The level probes are installed in places where liquid levels are to be measured, as described in 12.1.
The probe is immersed in the medium being measured, but the electronic assembly and connector should remain
above the maximum level of the medium. When installing the probe, the zero position should be precisely
determined. When the tube is particularly long, it should be fastened at two points. When the probe is installed in
the open air, a roof or box should be used to cover the electronic parts. If there is a current or turbulence in the
place where the probe will operate, a protective tube should be fitted.
The medium around the sensing module should not be allowed to freeze. The applies particularly to water
when the probe is used in the open air. The sealing diaphragms should be checked regularly, and
sediment deposits, blockages etc. should not be allowed to occur.
Dirt should be removed only by dissolving or washing off.
12.5. Electrical connection. Settings
12.5.1. The PCE-28P probe should be connected as shown in figure 1a.
The probes are factory set to the range specified in the order.
The user may adjust the setting within the range 10 % using the zero and range potentiometers.
i

E 16 DTR.PCE.PRE-28 (ENG)
12.5.2 . The probes are protected against excess voltage as described in 9.5.
12.6. Earthing.
PCE-28P probes with PD, PK, PZ connectors, if excess voltage protection is fitted, the probe’s extension tube
should be earthed.
PCE-28P probes with PZ connectors, in EX version, should be earthed via the external earth terminal.
13. PACKING, STORAGE AND TRANSPORT
13.1. The transmitters should be packed singly or in sets, in such a way as to protect them from damage during
transportation.
The transmitters should be stored in multiple packs under cover, in a place free of vapours and reactive
substances, with an air temperature between +5°C and +40°C, and relative humidity of not more than 85%.
Transmitters with uncovered diaphragm or seal connectors, stored without packaging, should have covers to
prevent damage to the diaphragm.
During transportation, the transmitters should be packed and secured so as to prevent them from shifting.
Any means of transport may be used, provided direct atmospheric effects are eliminated.
13.2. The PCE-28P probes are individually packed. Individually packed probes are bound in packages containing
several probes. Storage and transport as above.
14. GUARANTEE
14.1 The manufacturer guarantees the proper operation of the PCE-28 transmitters for a period of 24 months from
the date of purchase and servicing provided under the guarantee and following the guarantee period. In the case
of special versions, the guarantee period shall be agreed by the manufacturer and the user, but shall not be less
than 12 months.
14.2. The manufacturer guarantees the proper operation of the PCE-28P probes for a period of 12 months, as
well as servicing provided under the guarantee and following the guarantee period.
15. ADDITIONAL INFORMATION
The manufacturer reserves the right to make constructional and technological changes which do not lower the
quality of the transmitters and probes.
15.1. Related documents
Catalogue Cards “Diaphragm seals”
15.2. Related standards
PN-EN 60529:2003 Degrees of protection provided by enclosures (IP Code)
PN-EN 61010-1:2004 Safety requirements for electrical equipment for measurement, control and
laboratory use. General requirements
PN-82/M-42306 Screwed connectors of pressure gauges
PN-81/M-42009 Automatics and industrial measurements. The packing, the storage and
transport of devices. General requirements
PN-EN 1092-1:2004 (U) Flanges and their joints – Circular flanges for pipes, valves, fittings and
accessories. – Part 1: Steel flanges.
16. FIGURES

E 17 DTR.PCE.PRE-28 (ENG)
∅27
for output signal 4...20mA
Fig.1d. PCE-28 transmitter with PK connector
∅27
128
diag. 1c or 1d
PM12 cable connector
IP67 rated
cable as in connector PK
L max. by arrangement
L nom. - 3m
L
L
green - cable shield
_
+
∅2 capillary x0,5
black (correspond to terminals "3")
_
+
green - cable shield
10,5...36V DC
R
SUPPLY
DIN 43650 connector with PG-11
PD electrical connector
packing gland IP67 rated
Fig.1a. Wiring diagram for PCE-28, PRE-28 transmitters and PCE-28P probe
Fig.1b. PCE-28 transmitter with PD connector
Functional earth terminal. Not to be used as a protective terminal.
M20x1,5
25
5
∅6
∅4
8
2-wire
4...20mA
as in 5.4.1.
or connector
24...20mA
3
1
_
+
15...30V DC15...30V DC
∅27
∅6...∅9
0...10V
3-wire
116 (131-Ex)
3-wire
0...20mA
3
1
2
+
Output signal 0...10V
_
+
1
23
+
0...20mA
R
+ _
SUPPLY SUPPLY
black (correspond to terminals "2")
red (correspond to terminals "1")
red (correspond to terminals "1")
(output 0...10V, 0...20mA)
blue (correspond to terminals "2")
142
IP67 rated
PK cable connector
PK cable connector, IP67 rated
Fig.1c. PCE-28 transmitter with PK connector - (three-wire transmission 0...10V or 0...20mA).
Fig.1f. PCE-28 transmitter with PM12 connector
of zeroof span
Fig.1e.
(PD, PK lub PM12)
View of potentiometers
of zero and span
as in 5.4.1.
or connector
setting
or connector
setting
as in 5.4.1.
(Not applicable to Ex version)
Figure 1. PCE-28 transmitter with PD, PK and PM12 connectors: dimensions and methods of connection.

E 18 DTR.PCE.PRE-28 (ENG)
Span- setting of span
Zero- setting of zero
terminal
Control
Terminal 2 - Supply "-" (minus)
Terminal 1 - Supply "+" (plus)
Terminal 3 - TEST_SIGNAL
Earthing terminal
Terminal 2 - Output signal
Terminal 1 - Supply "+" (plus)
Terminal 3 - Supply "-" (minus)
Terminals designation to: 0 ... 20mA and 0 ... 10V output signals:
connect a multimeter to control terminals 2 and 3 (max. voltage fall on the milliammeter: 200mV).
Terminals designation to 4 ... 20mA output signal:
To output current measure in the transmitter without the signalling circuit disconnecting,
internal
IP66 rated
PZ connector
Or connectors
as in 5.4.1.
M20x1,5
∅5...∅10
packing gland
135
Terminal 2
Terminal 3
Terminal 1
∅63
4 8
110
Figure 2. PCE-28 transmitter with PZ connector: dimensions and connection method.