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1. Fastener C2 for fitting differential pressure transmitters with C type connection to a 2 pipe or to a wall see Catalogue cards U type handle K made from 3 mm metal sheet MB E for mounting the valve manifold EL 4 H Figure 13 Example how to install the PRE 28 transmitter with a valve manifold to a wall 26 DTR PCE PRE 28 ENG Looped siphon tube available from Aplisens Recommended when measuring vapour pressure Fitted vertically Threaded pipe stub available from Aplisens recommended when measuring liquid pressure Fitted vertically medium temp to 140 C or horizontally medium temp to 180 C Figure 14 Possible methods of isolating the transmitter from high temperatures 27 DTR PCE PRE 28 ENG M20x1 5 or G1 2 Socket M20x1 5 I or G1 2 socket L 1 n ES I I I Weldable pipe stube l T Pmaks 10 MPa l Marerials ST3S galvanized Order code i al Pipe stube M20x1 5 or G1 2 i l I I i I 1 1 Siphon tube oe T Pmaks 10 MPa c 300 onnector to we MALSATA Marerials i R 35 15 galvanized SO O
2. 5 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 C WARSAW JUNE 2010 APLISENS JSC 03 192 Warszawa ul Morelowa 7 tel 48 22 814 07 77 fax 48 22 814 07 78 www aplisens pl e mail aplisens aplisens pl Symbols used 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 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 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 qualifi
3. aaeain anaia aienea iania aeaa 12 PCE 28P LEVEL PROBES 15 12 1 APPLICATIONS 15 12 2 28 TECHNICAL DATA sssssssscsesssscsssccscesssenssccsseessnnsscesscensnecnsessccensenasocssessnecaaosssesssnenaoesssessnenaooes 15 12 3 PRINCIPLES OF OPERATION CONSTRUCTION U uu uu uuu uuu 15 12 4 PLACE AND METHOD OF INSTALLATION FITTING 12 5 ELECTRICAL CONNECTION SETTINGS 12 6 EARTHING 16 13 PACKING STORAGE AND nnn 16 TE GUARANTEE EID 15 ADDITIONAL INFORMATION 10 FIGURES S M C 2 DTR PCE PRE 28 ENG I APPENDIX Ex 02 DTR PCE PRE 28 ENG 1453 Appendix Ex 02 C 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
4. connector with flush diaphragm with G1 2 thread Sealing teflon 33 2 x 36 4 x 1 8 Fig 6e CG1 type connector with flush diaphragm with G1 thread DTR PCE PRE 28 ENG 24 5 1 G1 2 7 232 Fig 6d Weldable fitting ring for CG1 2 type connector Order code Socket CG1 2 30 1 0 1 Fig 6f Weldable fitting ring for CG1 type connector Order code Socket CG1 Figure 6 Process connections G1 2 and G1 vu H 58 m red correspond to terminals 1 e EA blue correspond to terminals 2 o98 a LS L to L T i output 0 10V 0 20mA m o S3 i green B 59 Tg 3 Sl 2 3 F black correspond to terminals 3 330 L oB gt a 0 i gt 9 Sis L nom 3m 3 o PK cable connector L max by arrangement m 5 gt 5 m 8 2 IP67 e AT S z o 5 8 g z red correspond to terminals 1 s 1 E c I _M20x1 5_ 5 2 E e Eo E o I A i 29 258 i pop ge black correspond to terminals 2 o 1 i D i gt 2 4 PK cable connector IP67 3 In version Ex use lead sealant
5. 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
6. only with the use of a diaphragm seal radiator looped siphon tube or impulse line Thermal compensation range 10 80 C for PCE 28 or by arrangement Thermal compensation range 0 70 C 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 28 PRE 28 Construction Materials Diaphragm Stainless steel 316L 00H17N14M2 Sensing module Stainless steel 316L 00H17N14M2 Casing for electronic parts Steel pipe 304 0 18 9 PZ type terminal box Thick steel pipe 304 0 18 9 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 C 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 1 2 NPT type connector with 1
7. 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 ac
8. 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 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 IP67 rated PN EN 60529 2003 PCE 28 PRE 28 with PZ type terminal box M20x1 5 packing gland IP65 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 transmittin
9. 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 O 12 2 2 PCE 28P Metrological Parameters Measurement range 0 200 500mm 0 700 3000mm Accuracy 0 2596 0 16 Thermal error of zero typically0 396 10 C 0 5 10C typically 0 2 1 0C max 0 399 10 C typically 0 2 10 C typically 0 295 10 C Thermal error ol span aY 0 3 0 ive 0 3 0 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 0225 standard 10 70 special version Medium temperature 25 80 Other parameters as given in 5 3 and 5 4 12 3 Principles of Operation Constructio
10. 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 6 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 6 M20x1 5 26 The PRE 28 transmitters can be installed using the Assembly Kit on a 225 pipe or on a flat surface using 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
11. 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 08 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
12. 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 H1 D H1 40 150 C modules H1D H1 for transmitters with diaphragm seal S Mazut 25 70 C 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 ER up to 110bar Other parameters are as given in Tables 1 except that the ambient temperature error is 7mbar 10 C The value of the pressure measurement range and related overpressure are given on rating plate and at Product Certificate 5 2 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 C 9 DTR PCE PRE 28 ENG 5 2 2 PRE 28 Metrological Parameters Measurement Ranges Table 2 100mbar 1bar 2bar 25bar 10kPa 100kPa 200kPa 2500kPa 250bar 25 40bar 4 for P type connector Overpr
13. ECTRICAL CONNECTORS AND INGRESS PROTECTION RATING OF CASE 6 CONSTRUCTION DEEST 10 6 1 MEASUREMENT PRINCIPLES 6 2 CONSTRUCTION 10 6 3 CASING ELECTRICAL CONNECTIONS 10 7 PLACE OF INSTALLATION OF TRANSMITTERS J 11 Ye GENERAL NOTE E M 11 7 2 Low AMBIENT TEMPERATURE 11 7 3 HIGH MEDIUM TEMPERATURE 11 7 4 MECHANICAL VIBRATION CORROSIVE MEDIA 11 8 INSTALLATION AND MECHANICAL CONNECTIONS 9 ELECTRICAL CONNECTION 9 1 GENERAL RECOMMENDATIONS 12 9 2 CONNECTIONS FOR TRANSMITTERS WITH PD TYPE CONNECTOR I 13 9 3 CONNECTIONS FOR TRANSMITTERS WITH PK OR PM12 TYPE CONNECTQOR 13 9 4 CONNECTIONS FOR TRANSMITTERS WITH TERMINAL BOX PZ TYPE CONNECTOR 9 5 PROTECTION FROM EXCESS VOLTAGE 13 9 6 EARTHIN G T Su apu aaa usu S kus oao 14 10 SETTING OF ZERO POSITION AND MEASUREMENT 40 4 4 14 11 SERVICES AND SPARE PARTS uuu uu ri aaa aeaa e eL Co a Xena ee LCOV santtdencaevseesceeeduesseestececearseesseateees 14 11 1 PERIODIC SERVICE 14 11 2 UNSCHEDULED SERVICES 11 3 CLEANING THE DIAPHRAGM SEAL OVERLOADING DAMAGE 11 4 SPARE PARTS
14. G 8 Basic requirements according to EN 50039 for type A and B leads used to connect the transmitter to the power supply and measurement circuit 8 1 Thickness of insulation according to type of material but not less than 0 2mm 8 2 Insulation strength 2Un but not less than 500V AC for the wire 500V AC between the cable screen and the connected wires 1000V AC between two groups of wires each of which contains half the connected wires of the cable 8 3 Multiwire cable must not carry any circuit which is not a intrinsically safe circuit 8 4 The cable must not carry circuits with a maximum voltage exceeding 60V 8 5 The cables should be protected from damage for example using channels shielding pipes cable racks durable fastenings etc 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 C 5 DTR PCE PRE 28 ENG Il 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 on
15. TURES 7 4 IDENTIFYING MARKS ORDERING PROCEDURE 8 5 TECHNICAL DATA 8 5 1 PCE 28 TECHNICAL u uuu eo co aeo os So Econ rou seu sne E CEN vaa Tee EE De sao sse PER VR 8 5 1 1 28 MEASUREMENT 6 2 20041102 001000 0000000050500000000000004004499800 nn 8 8 8 8 8 9 9 9 9 9 5 1 2 28 METROLOGICAL PARAMETERS 5 1 3 METROLOGICAL PARAMETERS PCE 28 FoR PED VERSION 5 2 PRE 28 TECHNICAL DATA 5 215 28 50 re ei ERI de Ie aAa AE AA aa aara a a Aa 5 2 2 PRE 28 METROLOGICAL PARAMETERS L nn 5 3 PCE 28 PRE 28 COMMON PARAMETERS 5 3 1 28 PRE 28 ELECTRICAL PARAMETERS 5 3 2 28 PRE 28 PERMITTED ENVIRONMENTAL CONDITIONS at 5 3 2 28 PRE 28 CONSTRUCTION MATERIALS 5 4 PRESSURE CONNECTORS 10 5 4 1 28 PRESSURE CONNECTORS 5 4 2 PRE 28 PRESSURE CONNECTORS sss 210 5 5 28 PRE 28 EL
16. b 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 1 Potentiometers can be used to shift the zero position and the range by up to 10 without altering the setting 1 The PCE 28 and PRE 28 transmitters with output signal 0 10V not attain precisely OV 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 t
17. be checked regularly and A 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 C 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 and PK connectors if excess voltage protection is fitted the probe s extension tube should be earthed PCE 28P probes with PZ connectors 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 an d 40 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
18. 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 li 0 1A for power supply with a trapezial and rectangular characteristic Ui 28V li 0 08A Input inductance and capacity Ci 40nF Li 0 9mH 6 DTR PCE PRE 28 ENG Appendix Ex 03 Temperature classification Ta oC Pi W 4 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 10 0 093 Rw 3000 Rw o ID r a e 1 i m Ui Uo Ea 2 g mm gt Fig 1 Power supply from a source with linear characteristic 6 2 power supply with a trapezial characteristic Supply parameters according to the certificate a Uo 24V 10 0 08 Po 1 2W for lt 60 and T6 or lt 70 and T5 b Uo 24V 10 0 05 Po 0 6W for lo lt 80 and T5 2e ao E Rw 1 1 peu 5 Ua 1 s Fig 2 Power supply from a source with trapezial characteristic If Uo x 1 2 Ua then parameters Ua lo Po are interrelated as follows 4Po _ Ua Uo Ua Uo Ua ere 5 Rw 6 3 for power sup
19. cessories Part 1 Steel flanges 16 FIGURES 17 DTR PCE PRE 28 ENG RGF z a 2 88 0 10V 0 20 SUPPLY 3 wire 3 wire Fig 1a Wiring diagram for PCE 28 PRE 28 transmitters and PCE 28P probe Not applicable to Ex version or connector 116 131 Ex x gt PD electrical connector DIN 43650 connector with PG 11 packing gland IP67 rated Fig 1b PCE 28 transmitter with PD connector 142 blue correspond to terminals 2 output 0 10V 0 20mA green O27 or connector PK cable connector as in 5 4 1 IP67 rated __ red correspond to terminals 1 4 capillary 22 0 5 green seting sening Z black correspond to terminals 2 of span of zero Fig 1e PK cable connector IP67 rated In version Ex use lead sealant of potentiometers span Fig 1d PCE 28 transmitter with PK connector PD PK lub PM12 for output signal 4 20mA or connector as in 5 4 1 PM12 cable connector IP67 rated T cable as in connector PK iag 1 1 Fig 1f PCE 28 transmitter with PM12 connector m a Figure 1 PCE 28 transmitter with PD PK and PM12 connectors dimensions and methods of connection C 18 DTR PCE PRE 28 ENG Protective earthing terminal 135 Earthing terminal internal Or connectors as in 5 4 1 PZ connect
20. 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 C 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 an
21. 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 Where necessary the packing gland should be further sealed as described in 9 2 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 1 2 3 T Protection between wires and ype of transmitter probe and Protection between wires TVS earth and or casing type of type of electrical connector diodes permitted voltage protectio
22. d 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 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 O0 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 100mbar 10kPa 400mbar 40kPa 0 1 1000bar 0 100kPa 100 Overpressure limit 100kP 2 250kP 4 x range repeatable no hysteresis 1bar 100 1200bar 120 Damaging overpressure 2bar 200kPa 5bar 500 8xrange max 2000bar 200MPa Table 1 Accuracy 0 3 0 2 0 16 special version Thermal error typically 0 3 10 0 4 10 C typically 0 2 10 C max 0 3 10
23. e e g a typical barrier with parameters Uo 28V 10 0 093 Rw 3000 Rw ID co lt 9 2 g cla 1 I gt Ui Uo S caa 1 L s Fig 1 Power supply from a source with linear characteristic 6 2 power supply with a trapezial characteristic Supply parameters according to the certificate Uo224V 1020 08A Po 1 2W b Uo224V 1 0 05 Po 0 6W Example of power supply from a source with trapezial characteristic see Fig 2 Ii Io Rw ID o 1 cla al I I U Uo Ug S L o gt o Fig 2 Power supply from a source with trapezial characteristic If Uo lt 1 2 Uq then parameters Uq lo Po are interrelated as follows 4Pi U Uo Uq Uo Uq T 4b 6 3 for power supply with rectangular characteristic U oot 7 _ Ui Uo l lo Fig 3 Power supply from a source with rectangular characteristic transmitter C 4 DTR PCE PRE 28 ENG Appendix Ex 02 Uo 24V 1020 05A 1 2 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 rectangula
24. ed staff having the required authorizations to install electrical and pressure measuring devices The installer is responsible for performing the installation 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 exposure to direct sunlight 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 C 1 DTR PCE PRE 28 ENG CONTENTS 1 APPENDIX EX 02 2 Il APPENDIX EX 03 wie 5 As INTRODUCTION A ET EE E E 7 2 USER MATERIAES uuu uuu 7 3 APPLICATIONS AND MAIN FEA
25. edia with temperatures of up to 120 C To protect the sensing module from temperatures in excess of 120 C 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 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 49 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 N 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 C 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
26. es 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 m 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 m
27. essure limit Static pressure limit Accuracy 0 4 0 25 typical 0 3 typical 0 2 Thermal error 10 0 4 0 3 Zero shift error for static pressure 0 196 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 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 Output signal 4 20mA two wire transmission 0 10 V three wire transmission 0 20 mA three wire transmission Error due to supply voltage changes 0 005 96 V Load resistance R O Usup V 10 5V for output signal 4 20 0 02A Load resistance for output signal 0 10V R 2 5kQ 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 for PCE 28 Ambient temperature limit 25 80 for PRE 28 Operating temperature range for intrinsic safe versions in accordance with Appendix Ex 02 Process temperature limit 40 120 C direct measu rement over 120 C
28. g 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 927 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 bo
29. gt 5 5 E S A S 1 a 238 PD electrical connector DIN 43650 connector with PG degree of protection IP65 180 ON3 8z 3ud 30d Hld C 22 DTR PCE PRE 28 ENG Standard version serrated lid Ex version smooth rounded lid T amp 1 1 a M20x1 5 8 packing gland grt 2565 927 SES PZ connector 289 IP66 20 9 tO 505 980 0 ud aad M10 or 7 16 UNF 4 holes e 106 Figure 8 PRE 28 differential pressure transmitter with C type process connection to be mounted together with valve manifold 23 DTR PCE PRE 28 ENG PCE 28P level probe max 120mm PD connector as in fig 1b or PK connector as in fig 1c connection as in fig 1a 1 1 Optional steel clasp for mounting 1 in hermetic tanks Optional movable clasp for mounting A in non hermetic tanks S SE _ Zero level y 1 Figure 9 PCE 28P level probes 24 DTR PCE PRE 28 ENG Assembly Kit made by APLISENS for fitting differential pressure transmitters Figure 11 Example how to install the PRE 28 25 DTR PCE PRE 28 ENG 97 he 155 T
30. he 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 C 15 DTR PCE PRE 28 ENG In the Ex version the user may replace only the terminal
31. ly 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 TA T6 Ga Gb ia 1 Ma IECEx FTZU 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 li Ci Li manufacture year 4 USER MATERIALS Together with the ordered transmitters the user will receive a Product Certificate b Declaration of conformity c Copy of certificate on request d Users 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 FTZU 09 0001 certificate The transmitters should be powered via the associated power supplier and measurement devices provided with the relevant intrinsic safe
32. ment 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 li 0 1A for power supply with a trapezial and rectangular characteristic Ui 24V li 0 08A Input inductance and capacity Ci 40nF Li 0 9mH Pi for all type of power supply see Table 1 3 DTR PCE PRE 28 ENG Appendix Ex 02 Table 1 o Temperature At 2 Temperature Pi W ACPC Tp classification Pi W C Tp C clasaflication 55 T6 65 T6 1 5 24 7 70 T5 0 9 14 8 80 T5 80 T4 and Group I 80 T4 and Group I 60 T6 0 6 99 70 T6 1 2 19 7 75 5 i i 80 T5 T4 and Group 80 T4 and Group 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 b
33. n 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 Fittin 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
34. n permitted voltage PCE 28 PRE 28 with PZ 1 connector 39V DC Plasma surge arresters 100VDC PCE 28 with PD PK or PM12 2 connector 39V DC Installed by arrangement 3 PCE 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 gt surge arresters such protection is not used in Ex versions of transmitters C 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 OmA OV by turning the zero potentiometer Turn the kno
35. or IP66 rated 5 10 1 Terminals designation to 4 20mA output signal Terminal 1 Supply plus Terminal 2 Supply minus Terminal 3 TEST SIGNAL To output current measure in the transmitter without the signalling circuit disconnecting connect a multimeter to control terminals 2 and 3 max voltage fall on the milliammeter 200mV Terminals designation to Terminal 1 Supply plus 0 20mA and 0 10V output signals Terminal 2 Supply minus Terminal 3 Output signal 23 9 Tool used to screw down the lid of the PZ terminal box for Ex version Figure 2 PCE 28 transmitter with PZ connector dimensions and connection method C 19 DTR PCE PRE 28 ENG Fig 3a M type connector Fig 3b Socket for M type connector with M20x1 5 thread 925 diaphragm seal Fig 4a P type connector Fig 4b Socket for P type connector with M20x1 5 thread TOP ia 5 if diaphragm seal t Fig 5a CM30x2 type connector Fig 5b Socket for Fig 5c Weldable fitting ring for with flush diaphragm CM30x2 type CM30x2 type connector with M30x2 thread connector Sealing teflon Order code Socket CM30x2 The ring in Fig 5c must be welded in place with the word TOP upwards 20 Fig 6a G1 2 type connector with G1 2 thread Sealing teflon 22 24 4 1 7 TES 27 6 Fig 6c CG1 2
36. ply with rectangular characteristic Power supply parameters examples Uo224V 10 0 05 Po 1 2W for lt 60 and T6 or lt 70 and 5 b Uo224V 10 0 25 Po 0 6W for lt 80 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 lo 50mA or lo 25mA 7 How to connect Ex transmitters Ex PC 28 XX YY PCE 28 XX Y Y 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 C 7 DTR PCE PRE 28 ENG 1 INTRODUCTION 1 1 This user s manual is intended for 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 connector
37. r characteristic use a stabilized power supply with Uo 24V with the ib level protection and current limited to lo 50mA Such current limit ensures that the power Pi not be exceeded 0 05A X 24V 1 2W and the powering of two transmitters simultaneously 7T 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 5 To measure the current Protective earthing in the transmitter without terminal the signalling circuit disconnectinc connect a milliammeter to control sockets 1 and 3 Hazardous area Safe area In hazardous areas connections to the control terminals must be made using Earthing terminal only instruments which 28V DC i Terminal 1 s plus are permitted to be used AP US in such areas T Terminal 2 minus PD electrical connector a Ex power supply M20x1 5 DIN 43650 see p 5 27 packing gland PG 11 packing gland 24 2640 5 10 PZ connector terminal box terminals 1 2 of the box correspond to terminals 1 2 of the PD connector PD and PZ connectors are connected as above the PK connector is connected as shown in Fig 1 in DTR PCE PRE 28 EN
38. r 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
39. rder code 316Lss S l CC Siphon tube M20x1 5 or G1 2 Order code RedSpaw S or SO M20x1 5 or 61 2 Figure 15 Additional equipment for fitting of pressure transmitters
40. 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 28 PCE 28P and PRE 28 transmitters are produced in accordance with the requirements of the following standards EN 60079 0 2004 EN 50303 2000 EN 60079 26 2007 EN 60079 11 2007 EN 61241 0 2006 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 1 26 Ga Gb Ex ia IIC 4 5 6 I M1 Ex ia I II 1D Ex ia D20 T105 C 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 li 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 08 002 certificates and certification documentation The transmitters should be powered via the associated power supplier and measure
41. s 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 04 002 are contained in the appendix designated DTR PCE PRE 28 ENG Appendix 02 During installation and use of PCE 28 PRE 28 transmitters and PCE 28P probes 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 amp 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 amp 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
42. 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 C 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 fo
43. x 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 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 1 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 lin

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