*09005272* Operating Instructions
Contents
1. do this you must enter the noted value with the sign reversed and save it under ofl A The entered value is purely a number value no decimal point is shown If the device has already been used values for the oF and nP parameters may have been entered In this case please set both parameter values to zero and carry out the zero point alignment again Only when you leave the menu via the ESc parameter are the set parameters valid After zero point adjustment the pressure sensing lines can be reconnected 5 3 4 Damping and zero point stabilizing If there are unsteady pressure readings at this point of time or during operation you can use parameters dAN and aP to stabilise the reading and the output Signal The sAN parameter acts like a capillary throttle However it only has an effect on the display the output signal and the switch points but not on the measuring cell itself You can set the response time to pressure jumps using this parameter The values range comprehends 0 0 to 100 0 seconds With maximum damping it will take more than 2 minutes for the reading al so to reach zero after a pressure jump from nominal pressure 100 to zero In many cases unsteady readings are not a prob lem during normal operating mode but this is not true for the idle state i e if zero differential pres Sure is expected In such situations parameter nP can be applied Its value defines a measuring value range of2. ee ae A QA a DP A O 5 Starting Operation All electrical supply operating and measuring lines and the pressure connections must have been cor rectly installed before commissioning All supply lines shall be arranged such that there are no me chanical forces acting on the device Check the leak tightness of the pressure connec tions before commissioning 5 1 Display 3 Character LED Display Switching Output1 Switching Output 2 Measuring Control keys e The 3 2 character LED display presents the current differential pressure in normal operating mode e The selected measuring unit is highlighted at the right of the display A The units represented on the screen may devi ate from the actual design MESS UND REGELTECHNIK F SCHER e Above the display two LEDs symbolise the condition of the switching outputs As soon as the switch is closed the applicable LED lights up 5 2 Control keys The control keys have the following functions Menu down v Decrease value gt _ Enter key Menu up Dr Increase value By using the middle key on the membrane key pad you can access the parameter menu settings mode The display now shows the text ESC By using the right akey you can move up within the menu and can now select numerous parameters By pressing the left w key you can move down wards in the menu and finally get back to the ESc parameter By pressing the middle key you can c
3. 09005272 BA_EN_DE58 Rev D 06 15 KERZE solutions Operating Instructions DE58 with 3 digit LED display Table of Contents Safety instructions Intended applications Product description and functions Installation Inbetriebnahme Maintenance Transport Service Accessories 10 Disposal 11 Technical specifications 12 Dimensioned drawings 13 Ordering Code 14 Declaration of Conformity OONOOaRWND 1 Safety instructions 1 1 General information This operating manual contains detailed information about the installation opera tion and maintenance of the instrument This information must be observed and cas by the installer operator and other skilled per sonnel prior to any installation and commissioning of the instrument This operating manual forms part of the product and must be kept in the immediate vicinity of the instru ment for easy access by the responsible personnel at any time The following chapters especially the instructions on installation commissioning and maintenance contain important safety information the non compliance of which may result in hazards to per sons animals environment and objects 1 1 Personnel qualification Only personnel trained in the installation commis sioning and operation of this product may install and operate the same Skilled personnel are persons who are able to judge delegated work and possible hazards based on their technical education profici
4. 30 Support point table with 3 to 30 value pairs onto7 Whenever you change the value of F the program will create a new table All previous table values are rejected and replaced with new linear entries The tables for types F O to F 2 are not visible Here internal values are used for table calculation These values cannot be modified For F 3 30 you only have influence on the 1 28 intermediate values see 5 3 8 you only have ac cess to the start and end value via the NA and NIE pa rameters If the parameters NA and NE are changed the table will be deleted and F 0 is set i At the start of measuring range NA 0 is emitted by the output signal e g 0 mA At the end of measuring range NE 100 is emitted by the output signal e g 20 mA 5 3 8 Menu jump Lin If the value of F is larger than or the same as 3 there is a submenu Lin Here you can access all ta ble values except for the start of the table NA and the end NE This submenu has its own entry and exit point which is represented with End The table is not saved until you switch back to this point in the main menu meaning that you switch back using the key to the Lin parameter If the table is not structured correctly an error mes sage Err will appear at this point and you will not be able to exit the submenu The table consists of 2 29 value pairs On a device with a power output the first value pair is 02 P0A The
5. error sig nal is determined The value specified with ofr is emitted as an output signal if the device detects an internal error and can no longer works correctly However not all possible errors and defects can be detected by the device If you set o amp obe 0 the output signal is no long er checked for limits If you set oG to the maximum value 11 V or 21 mA you can change using ob the output signal independent of pres sure from zero to the maximum value It is not necessary to leave the menu item the output is then carried out immediately You then operate the device as a signal transmitter and can then easily check the other signal processing MESS UND REGELTECHNIK F SCHER 5 3 7 Characteristic curve function 7 For certain applications a pressure measurement is only an indirect measurement for the actual varia ble Flow measurement across an aperture or filling level determination through hydrostatic pressure measurement is two typical examples of this In these cases it may be necessary to change the Output signal of the transmitter through a non linear characteristic curve so that the subsequent evalua tion receives a signal linearly proportional to the ac tual measured value e g volume in m or volume flow in cm s etc The F parameter allows you to select between the following variants Linear characteristic curve standard Root extracted characteristic curve Horizontal cylindrical tank
6. initial value 2 determines the level of the out put signal The second value PO determines at which pressure the output signal should be emitted Then come the value pairs 103 P03 129 P29 The entry of or changes to the table values via the membrane keyboard is extremely strenuous and prone to errors It is only intended as an emergency solution in case access to the PC adaptor is not possible The table is correct if the following applies for all signal values the value is larger than the previous value For the pressure values therefore either the larger rising characteristic curve or the lower fall ing characteristic curve apply accordingly A transi tion from a rising to a falling characteristic curve or vice versa is not permitted 5 3 9 Switch points The two switching outputs are configured through four parameters each The function of the switching output is deter mined through the parameters r A rIE rid and riF The function of the switching output is deter mined through the parameters ref rE red and rF riR determines the switch off point and E deter mines the switch on point for switching output 1 The values are set in the valid measuring unit shown on the right Together both the A and rIE parameters deter mine the switching function of switching output 1 If IR is smaller than rIE the output switches on if the measuring value exceeds rIE It does not switch off unt
7. mit as specified by the current data sheet complies with EC directives 2004 108 EC EMC The products were tested in compliance with the fol lowing standard Interference immunity for industrial environments interface emission for residential envi ronments DIN EN 61326 1 2006 10 DIN EN 61326 2 3 2007 05 DIN EN 61010 1 2002 08 The devices bear the following marking Ce Bad Salzuflen 06 04 11 Ort Datum place date rechtsverb Unterschrift legally authorized signature Technische nderungen vorbehalten Subject to change without notice Changements techniques sous r serve Fischer Mess und Regeltechnik GmbH Bielefelder Str 37a D 32107 Bad Salzuflen Tel 49 5222 9740 Fax 49 5222 7170 eMail info fischermesstechnik de www fischermesstechnik de
8. rameter from the list e Press the Enter key in order to call up the pa rameters e Use the w a arrow keys to set the required val ue e Use the Enter key to save the value After you have set all the parameters leave the menu as follows e Using the w a arrow keys set the ESC parame ter You can find this both at the start and at the end of the parameter list e Use the Enter key to leave the menu 5 3 2 Selection of pressure unit First select the required pressure measuring unit The unit currently valid is highlighted on the right next to the figure display For setting use the mid die gt key and then look using the right a key for the on parameter Press again and then change the value shown using Aor v After selection save the value with and on will appear again in the display To complete leave the settings mode Press w until ESC and then Now the pressure currently meas ured is represented On the right of this the correct pressure unit should be highlighted The display circumference is limited to 1999 For this reason not all specified pressure units may in individual cases be selectable 5 3 3 Zero point control and adjustment Ensure that the device is depressurised if neces sary disconnect the pressure connection lines If the device does not indicate precisely zero please note the shown value The of parameter enables you to adjust the offset exactly to zero To
9. rises If NA gt NE we speak of a falling characteristic curve and the output signal decreases as the pressure rises The difference between values NA and NE must be at least 25 of the basic measuring range The soft ware will not allow larger spreads You will not be able to exit the menu if you have entered incorrect range values A Example With a basic measuring range of 400 Pa the following must apply NA NE gt 100 Pa 5 3 6 Output signal limits Namur The three parameters obl o62 and ofr determine independent of the pressure the limit values for output currents or voltages which must not be un derrun or exceeded These limit values are superordinate to the range determined through NA and NE They serve mainly to suppress error messages in downstream systems through short term measuring range exceedances With the oG parameter the limit value for the mini mum output signal is determined The output signal cannot underrun this value Generally this parame ter is only expedient for devices with an output sig nal of 4 20 mA because on these devices a value below 3 8 mA is often evaluated as an error signal With the ob parameter the limit value for the max imum output signal is determined The output signal cannot exceed this value This parameter can be used for all outputs voltage and current in order to limit the maximum value to e g 10 2 V With the oEr parameter the value for the
10. Mounting Polyamide PA 6 6 Brass VITON EPDM Wall mountable using adaptor plate FASCHER gt ess UND REGELTECHNIK 11 Programming Via membrane key switches or by using PC programming interface accessory programming mode can be password protected Settings Input filtering 0 0 100 0 secs 10 90 step response time for signal output display separated Switch output activation point de activation point response time delay 0 0 100 0 secs logic N O or N C Measurement unit selection mbar Pa free unit start value end value and decimal place for free unit Zero suppression 0 1 3 of main measurement range 1 Output signal start end value can be set at any point of measuring range 2 Zero pressure calibration 1 3 of main measurement range 3 Output characteristic Linear square rooted horizontal cylindr tank table 3 30 entries Password range 001 999 000 password protection disabled 1 Measured value deviations symmetric about zero are set to zero Used for zero drift suppression 2 Maximum effective turn down ratio 4 1 Only the output signal is affected Transfer function is inverted if start value gt end value 3 Zero calibration setting may change with mounting orientation 12 Dimensioned drawings 117 Threaded hose clamp Wall mounting adaptor plate FASCHER N ESS UND REGELTECHNIK 13 Ordering Code Digital Differential
11. Pressure Transmitter Switch Type DEse m IKlo m w Measuring range OP gee 160mb ar ans nee gt 6 Dr OI een ee gt 8 Dar 6 8 9 062 ee gt 8 O ur DOOMDIE een anna near gt C Diaphragm Gaskets EPDM PPPS Nee aaa gt A Pressure Chamber Pressure connections G1Atemdelhre d nsenr ee gt Connector with male thread G1 4 B Brass ussssnssssnneesnnnnnnnnnnennnnnnnnnnnnennnnnnnnnnnnenn gt Cutting ring connection of 1 4571 for 6 mm tube uusssnnssnnnneeeennnnnnnnnennnnnnnnnnnnenenn gt Cutting ring connection of 1 4571 for 8 mm tube uusessssnsssnsssnnnnnnneeeeeeennnnnnnnnnnnn gt Cutting ring connection of brass for 6 mm tube ssunssssennennnnnnnnnnnennnnnnnnnee nn gt Cutting ring connection of brass for 8 mm tube s 44sessnnnnnnnnnnnnnnnennnnnnnnnen nn gt DDDDNOO onahoa Electrical Signal Output VVIIHOUL OUIDUF SIO uses ee een ees eae ee gt 0 20mA 3 wire STANDARD aussen gt 0 10 V DC 3 wire STANDARD ccccceececeeceeneeeseeseeeeeeeeeeeeeeseaaaaesseeeeeeeeeeeeeeseeaaaaaeeess gt 4 20 mA S wire STANDARD summer gt VOLO Power Supply 24 V DC AC 12 32 V DEAD ee ae gt K Measuring Unit Standard Bl md orcs 8 G2 E ai e E ae EE EE ee A EEE gt 0 Display Switching Function 3v digit LED display 2 relay COMACIS sesir ee gt 3 3v2 digit LED display 2 solid state switch OUTDUTS cccccseeeees
12. a the PC adapter 5 3 11 Display options The df parameter permits the reading to be stead ied if the measuring value fluctuates severely This filter function is similar to the JAN function but has an effect only on the display and not on the output signal With d 1 only the switch point LEDs can be controlled With 40 2 these are switched off 5 3 12 Reset to default values The r amp S function serves to reset all settings to de fault Default values can only be defined via PC in terface 5 3 13 Free unit If the device is designed for a free third unit membrane symbol YW the display can be scaled at will using the parameters NAF NEF and dPF The measuring range defined through the parame ters NA and NE is converted into NAF and NEF Here the table function F is also taken into account The value of dPF determines the position of a deci mal point FASCHER AN ESS UND REGELTECHNIK 5 4 Parameter overview After switching on the device it will briefly indicate the software version number and then enters the normal operating mode By using the middle key on the membrane keypad you can access the pa rameter menu The reading now shows the text ESC By using the right a key you can choose the pa rameters from the following list one by one Note a Depending on the device design indi vidual parameters may not be available if the device does not possess this fea ture PAS Enter
13. all up a pa rameter Using the wand a keys you can then set the pa rameter value In order to take on the adjusted parameter value press the gt key All adjusted parameters are first then saved if you leave the menu via the ESc parameter 5 3 Configuration For commissioning there is a multitude of setting options for optimum adaptation of the device to the measuring point and task at hand This section co vers these options step by step Depending on the device design available some menu points are not available For example all characteristic curve functions are masked from the menu if the device does not have a signal output The device can be completely set con veniently on the PC using a PC adaptor There all parameters are immediately visible and accessible In addition the complete configuration can be loaded saved and documented as a control print out Further guide lines on this program can be found in the documen tation for this program see accessories 5 3 1 General Put the device electrically into operation and ensure that the device is initially depressurised if neces sary disconnect the pressure connection lines 1 With reference to the transmitter signal voltage output current output etc In order to set a parameter proceed as follows e Press the Enter key in order to switch into the menu ESC will appear on the display e Use the v a arrow keys in order to select a pa
14. around zero The measuring value is set to zero within this range A Example For nP a value of 0 08 mbar is entered In this case all pressures which lie within a range of 0 08 mbar to 0 08 mbar become zero Only if the pressure exceeds these limits will the read ing no longer indicate zero The pressure value and the reading do not however accord one hundred percent with each other Only after a doubled value i e from 0 16 mbar will the measuring pressure and the reading match again 5 3 5 Setting the output signal The transmitter output signal primarily depends on the measured pressure However you have the op tion to adjust the output signal to a large extent to suit your requirements However the basic measuring range indicated on the type label and the type of output signal voltage or current are not variable The parameters NA Start of measuring range and NE End of measuring range define the limits to which the output signal can change at all Both val ues are adjustable across the entire basic measur ing range The set values always refer to pressures in the relevant valid pressure unit and are converted when the unit is changed 3 0 08 mbar 2 8 Pa MESS UND REGELTECHNIK F SCHER The allocated signal values for NA and NE cannot be changed see type label e g 0 10 V or 4 20 mA If NA lt NE we speak of a rising characteristic curve The output signal increases as the pressure
15. eeeeeeeeeeaeeeesaeeeeeseeeesaaueeesaeeeesaueeesneesaeeeess gt 6 Electrical connections M12 roundshell multi pin connectors 2 0 0 cc ceeeeccececeeeeeeeeceeeeeaeeeceeeeeeeeeeeeeeeeeeeeeeseeeeessseeeeeeeeessaeeeeeeeesseaaeeeeeeeeas gt M Mounting W alll MOUNN esssS e e EEEERECHEEEE BE SAUEELDEHEEESSTEEERNEENEDUERTAI EEURNOPEHEDRSEENEN gt W 13 1 Accessories Ordering code 06401993 cable with M12 connector 4 pin for relay switch 2m 06401994 cable with M12 connector 4 pin for relay switch 5m 06401995 cable with M12 connector 5 pin for supply signal 2m 06401996 cable with M12 connector 5 pin for supply signal 5m EU03 F300 PC programming interface with SW Designation Pins Application Length FASCHER ess UND REGELTECHNIK 14 Declaration of Conformity EG Konformitatserklarung Wir erklaren in alleiniger Verantwortung dass nach stehend genannte Produkte EC Declaration of Conformity We declare under our sole responsibility that the products mentioned below Digitaler Differenzdruck Digital Differential Pressure Transmitter schalter Transmitter Switch DESSHHHHHHHHHHHH gem g ltigem Datenblatt bereinstimmen mit den EG Richtlinien 2004 108 EG EMV Die Produkte wurden entsprechend der folgenden Normen gepr ft St rfestigkeit f r Industriebereich St raussendung f r Wohnbereich DIN EN 61326 1 2006 10 DIN EN 61326 2 3 2007 05 DIN EN 61010 1 2002 08 Die Ger te werden gekennzeichnet
16. ency and experi ences particularly due to their knowledge about the applicable norms FASCHER gt MESS UND REGELTECHNIK Digital Differential Pressure Transmitter Switch 1 2 Risks of non compliance with safety instructions Non compliance with these safety instructions in appropriate use of this product and or operation of this product outside the limits specified for any of its technical parameters may result in harm to per sons the environment or the system in which it is installed The producer is not liable for any claims for damag es in such circumstances 1 3 Safety instructions for operators Safety instructions for the proper use of this product must be followed This information must be availa ble at all times to personnel responsible for installa tion operation maintenance and inspection of this product Adequate steps must be taken to prevent the occur rence of hazardous conditions that can be caused by electric energy and the convertible energy of the process media and or improper connection of the instrument Detailed information can be found in the relevant national and or international rules and regulations MESS UND REGELTECHNIK F SCHER In Germany DIN EN UVV apply for industry specific applications regulations of DVGW Ex GL as well as the rules of the local authorities EVUs in Germany 1 4 Forbidden modifications Modification or other technical alteration of t
17. ented meaningfully Start of measuring range The measuring value is set that result in a minimum output signal e g OV OMA or 4mA End of measuring range The measuring value is set in a way that results in a maximum output sig nal e g 10 V or 20 mA Offset correction measuring input 1 Value range 3 FS 0 FS Characteristic curve function Value range 0 30 0 linear 1 root extracted 2 horizontal cylindrical tank 3 30 table Menu entry Submenu table processing If F lt 3 this menu item is masked Limit value Minimum output signal Limit value Maximum output signal Error signal Output signal in case of error Reset All parameters to default values speci fication of default values via PC Password settings Value range 000 to 999 The value 000 means no password protection 6 Maintenance The device does not require maintenance In order to ensure reliable operation and a long ser vice life of the device we recommend regular check ing of the device as follows e Check the function in connection with slave components e Check the tightness of the pressure connection lines e Check the electrical connections The exact test cycles have to be adapted to the op erating and environmental conditions The operat ing manuals of all other devices are also to be ob served if there is an interaction of different device components 7 Transport The product must be
18. he de vice by the customer is not permissible This also applies for the use of spare parts Any eventual modifications variations will be carried out solely by Fischer Mess und Regeltechnik GmbH 1 5 Impermissible operational modes The operational dependability of the device is guar anteed only if it is used as intended The device version must be adapted to the medium used in the system The limiting values stated in the technical data must not be exceeded 1 6 Safety Considerations during Installa tion and Maintenance The safety instructions stated in this manual exist ing national regulations on accident prevention and the internal rules and procedures on working oper ation and safety of the operator are to be observed It is the responsibility of the operator to ensure that only authorised and skilled technical personnel car ry out any required maintenance inspection and in stallation works 1 7 Explanation of symbols N WARNING Indicates a possible hazardous situ ation the non observance of which might result in hazards to humans an imals environment and objects INFORMATION points out important information for efficient and trouble free operation TIP points out useful recommendations that are not necessarily required for operation that might however be of use in certain situations 2 Intended applications The product includes the functions of sensing sig nal conversion di
19. il the measuring value underruns A hyste resis function lf A and E are equal the output switches on if the measuring value exceeds r E and off if the measur ing value underruns r A If A is larger than rIE the output switches on if IE lt measuring value lt IA applies window function Both parameters can be set independently across the entire measuring range If the measuring unit is switched the switch points are recalculated accordingly Here rounding errors may cause deviations in the last point rid allows the reaction of the switching output 1 to be delayed by 0 0 to 100 0 s This value applies equally for switch on and switch off With a voltage output u02 POA u29 P29 rIF reverses the function of the switching output If the value 1 the switching output functions as an NO contact if the value 2 the switching output functions as an NC contact 5 3 10 Password The last menu item P serves for the input of a password A value of 001 to 999 can be selected as a password The value 000 renders the password function invalid If a password was assigned a text PAS is shown af ter ESC and and you must enter the right value by using and a v Only by doing so will you be able to access all other menu items In the event of an error the reading goes back to the start of the menu ESC If the password is forgotten it can only _ be reset by the manufacturer or over written vi
20. password only comes up if password is active values range 000 999 000 deactivated JAN Damping Jump response time Too values range 0 0 100 0s d0 Display damping Value range 2 0 100 2 Display off LED switching pt off 1 Display off LED switching pt on 0 Display on LED switching pt on 1 100 Display damping riA Switch off point From switching output cle Switch on point From switching output rid Switching delay From switching output Values range 0 0 to 100 08 This value applies equally for switch on and switch off cle Switching function From switching output Values range 1 2 1 Switching output as NO contact 2 Switching output as NC contact ref Switch off point From switching output ree Switch on point From switching output red Switching delay From switching output Values range 0 0 to 100 0s This value applies equally for switching on or off MESS UND REGELTECHNIK F SCHER ref on nA NIE of Lin obl obe ofr rES Switching function From switching output Values range 1 2 1 Switching output as NO contact 2 Switching output as NC contact Measuring range unit Values range 1 2 3 The selection is highlighted on the right hand side next to the display Not all basic measuring ranges allow any switching The respective unit size can only then be selected if the basic measuring range of the device can be repres
21. protected against severe im pacts Therefore transport is to be effected only in the packaging intended for transport 8 Service All defective or faulty devices are to be sent directly to our repair department We would like to ask you to coordinate all device returns with our sales de partment Remaining medium in and on disman tled measuring instruments may cause danger to persons environment and equipment Take reasonable precau tions Clean the instrument thoroughly if necessary 9 Accessories e M12 connectors with pre wired cable lengths on request e PC serial interface adaptor with software model EU03 F300 10 Disposal Protect your environment oY Kindly help us protecting the environ ment and dispose of or recycle the used products in accordance with the relevant regulations amp Technical specifications MESS UND REGELTECHNIK F SCHER Measuring range mbar 0 160 0 250 0 400 0 600 Max static operating pressure bar 16 bar Straight line error max FS 2 5 Straight line error typ 9 FS 0 8 TC span max 9 FS 10K 0 8 0 4 TC span typ 9 FS 10K 0 2 TC zero point max 9 FS 10K 0 8 0 5 TC zero point typ 9 FS 10K 0 2 Straight line error nonlinearity hysteresis at 25 C pressure within specified range characteristic linear not spreaded Pressure within specified range characteristic linea
22. r not soreaded compensated temperature range 0 to 60 C Operating temp ambient Operating temp media Storage temperature Static operating pressure Overload capacity Protection class housing Nominal supply voltage Operating supply voltage Output signal Output signal load Power consumption Switching contacts Display Electrical connections Pressure connections Materials housing Materials media contact Mounting 20 70 C 20 70 C 30 70 C see table single sided overpressure proof up to the rating of the measuring system and side vacuum proof IP 65 per DIN EN 60529 Electrical 24 V DC AC 12 32 V DC AC 0 20 MA 4 20 mA 0 10 V 3 wire For output current R lt Us 4 V 0 02 A Us lt 26V else R lt 1100 Q For output voltage R 2 2 KO Us gt 15 V RL 10 KQ Us 12 15V Approx 2 W VA 2 sets of programmable voltage free relay contacts NO or NC Umax 32 V DC AC Imax 2 A Pmax 64 W VA Optional instead of relay outputs 2 programmable voltage free MOSFET switch outputs NO NC U 3 32 V DC AC Imax 0 25 A Pmax 8 W VA Ron lt 4 Q 3 digit LED Connections Two round shell multi pin connector sockets M12 male Connector 1 5 pin power input and analog signal output Connector 2 4 pin relay contacts solid state switch outputs G 1 4 female threads with optional cutting ring fittings for 6 or 8 mm tube Materials
23. splay signal transmission and limit detection of differential pressure of gases and liquids The product must be used only for applica tions and under conditions specified by the manu facturer In case of uncertainties the user should consult the manufacturer before installing and using the product 3 Product description and functions 3 1 Functional scheme 3 2 Principles of operation The instrument uses a tough flexible sensing dia phragm embedded between stiffening plates and balanced by springs on either side The diaphragm is at zero position when pressures on either side of the diaphragm are equal Inequality of pressures results in deflecting the diaphragm towards the low er pressure side until a new equilibrium determined by the changed balance of forces is reached Fas tened to the center of the diaphragm is an axial rod the other end of which forms the moving core of a linear inductive displacement transducer The linear displacement is proportional to the pressure differ ence across the diaphragm This displacement is converted by the transmitter s electronic module to a standard electrical signal output An optional out put signal can be slew rate limited spreaded in verted and piecewise transformed nonlinearly by means of a table function 4 Installation The device is equipped with a wall mounting adap tor plate The pressure transmitters are calibrated at the fac tory while mounted vertically press
24. ure ports down ward However they can be mounted in any orien tation If they are installed with any orientation other than vertical pressure ports downward the zero point must be reset IP65 protection for the housing is guaranteed only if Suitable connecting cable is used If the instrument is intended for outdoor application we highly recommend using an adequate protective housing or at least a big enough shelter as per manent protection against UV radiation on the membrane keyboard and against exposure of the instrument to rain or snow 4 1 Process connection e Ensure that process equipment and pressure lines are at atmospheric pressure before mak ing pressure connections e The instrument should be provided with suita ble protection against pressure surges e g snubber or pulsation damper e Ensure that the mechanical configuration and materials of construction of the instrument are compatible with the process media e Ensure that process pressure is always less than the specified safe pressure rating e Carefully check the pressure tightness of all pressure connections before start up The instruments pressure ports are marked by and symbols For differential pressure applica tions the port must be connected to the higher pressure and the port should be connected to the lower pressure Pressure lines must have a downward gradient throughout from the pressure instrument to the pro cess
25. vessel pipe This is to prevent formation of air gas pockets for liquid applications and liquid plugs for air gas applications If this continuous downward gradient cannot be provided for any rea son then suitable water and or air separation de vices must be inserted into the pressure lines Pressure lines must be kept as short as possible and must not have short bends to avoid measure ment errors induced by pressure line delays If the pressure transmitter is subjected to pressure when it is started up zero point checking and ad justment is not possible In such cases only electri cal connections of the instrument should be made but not the pressure connections 4 2 Electrical connection e Only qualified technicians authorized for this type of work should undertake installation e Electrical connections must comply with rele vant international national and local regulations and norms relating to electrical and instrumen tation installations e Switch off electrical power to the plant before attempting electrical installation work of any kind e Make electrical connections to the transmitter through a suitable energy limiting safety device F SCHER MESS UND REGELTECHNIK 4 2 1 Connector 1 Supply input and Signal output Internal connection Supply U Signal Sig Supply Up Signal Sig 4 2 2 Connector 2 Switch outputs BN WH _ BU BK 1 2 3 4 e 2 098
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