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Emerson Process Management - Emerson Electric Co. Ventilation Hood 7951 User's Manual

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1. Nut Plain Earth y washers lead Figure 4 6 The 7951 s Earth Stud Page 5 6 7951 Chapter 5 Installing the system 7951 7951 PL2 PL3 PU PLS PLE PLT PL8 PLO 1 Earth stud on 7957 rear panel D type and Klippon 2 Cabinet earth or other suitable metal structure Figure 4 7 Multiple 7957 chassis earthing through studs and earth leads Page 5 7 Chapter 5 5 10 Page 5 8 Installing the system Step 7 Connecting the power supply Plug the dc power connector into plug PL1 and switch on the power The instrument goes through the following Power On Self Test POST routine e The display shows a sequence of characters or patterns to prove that all elements of the display are working There is a pause of five seconds between each change of pattern e The program ROM is checked against a checksum The display shows how the test is proceeding e Critical data are checked The display shows the result of this check e The coefficients are checked The display shows the result of this check e The battery backed RAM is checked The display indicates progress e Any saved programs are checked The display shows the number of programs and their status Note that for a new machine there are no stored programs e Ifa battery is fitted its condition is checked and reported Note that when the power is switched on the alarms may light up You can
2. 12 5mm it Screws 2 Mounting _ Captive Clamp Clamp Note Sufficient clearance is required for plugs and cables at the rear of the 7951 Page 5 4 Figure 5 4 After assembly Chapter 5 Installing the system You can mount the clamp so that it is fixed permanently or can be removed later if required If you want the clamp to be fixed permanently carry out Steps 3 8 If you want to be able to remove the clamp carry out Steps 9 12 If the clamp is to be fixed permanently 1 5 6 Make sure that the face of the front panel is in good condition and has no loose or flaking paint Use a suitable de greasing agent to clean the face of the panel Insert the location moulding through the aperture in the front panel Peel the protective strip off the adhesive tape on the face of the mounting clamp Then working from the back of the front panel carefully position the clamp over the location moulding The clamp and panel bond on contact Press firmly on the area where the clamp is bonded to the front panel to ensure that they are bonded firmly Remove the Location Moulding and discard it Slide the instrument through the front panel Tighten the two captive screws to secure it into the clamp Finally attach all connectors to the back panel Note that if you install more than one instrument it helps to support them if you use a Mounting Strap to link each clamp to the next one as shown in Figure 4 5
3. Analogue input n type Selection gt PT100 input Y Note 7 n is the 0 als input number of the input channel 4 20mA input selected earlier on Input channel n Turn to Part 1 page Base density Wizard Map Part 2 of 2 Page 10 19 Chapter 10 Configuring your instrument by using wizards 10 15 Temperature wizard This wizard configures the 795x for getting line temperature A and or density temperature A and or density temperature B data Setup wizard Temperature b key Exit wizard Edit Line Temperature Edit Dens Temp A No gt No Yes gt Yes s s Dens tempA input chl Dens tempB input chl a K Selection K Selection x r Analogue input 1 Analogue input 1 gt Analogue input 1 Y Y Analogue input 2 Analogue input 2 Analogue input 2 y etc y etc v ete mA input 10 10 mA input 10 mA input Analogue input n type Analogue input n type Analogue input n type K Selection K Selection K Selection E NT PT100 input gt PT100input gt PT100input PIE WEBER SET TER FETT RICO UU Jer e du E 0 20mA input 0 20mA input 0 20mA input number of y Y y the input 4 20mA input 4 20mA input 4 20mA input channel selected IE e
4. Back of Back of instrument instrument Mounting clamp D Mounting clamp Inside of front panel Mounting strap Figure 4 5 Mounting arrangements for more than one instrument If the clamp is to be removable 7 8 9 Insert the location moulding through the aperture in the front panel Working from the back of the front panel carefully position the clamp over the location moulding Remove the Location Moulding and discard it Slide the instrument through the front panel Tighten the two captive screws to secure it into the clamp Note that if you install more than one instrument it helps to support them if you use a Mounting Strap to link each clamp to the next one as shown in the diagram Page 5 5 Chapter 5 Installing the system 5 8 Step 5 Making the external connections 1 Refer to the documentation supplied with the external equipment to see if you have to carry out any special procedures when connecting them to the 7951 Take special notice of any information about safety requirements in hazardous areas and complying with EMC regulations 2 Foreach D type connector pass the connector hood over the cable and wire up the connector Secure the hood and connector body together then connect the earth wire to the hood Stick an identifying label on to the connector hood 3 For each Klippon connector wire up the connector then stick an identif
5. gt See note 4 No Exit Wizard 1 Route detours to the Special Equation wizard sequence before continuing 2 Route detours to the Analogue output wizard sequence before continuing 3 Route detours to the User Alarm wizard sequence before continuing 4 Route detours to the Multiview wizard sequence before continuing Page 10 10 SG1 Application Wizard Map 10 10 SG 2 Application Wizard Chapter 10 Configuring your instrument by using wizards This wizard can be used to configure a system that has a 3096 gas specific gravity transducer connected to Density input 4 Special equations analogue outputs user alarms and multi view can also be configured here Setup wizard SG 2 Edit Gravitometer B No No Yes gt Edit SG un Limits amp Fallback No No Yes b SG hi limit y k SG low limit Y Prime SG FB type K Selection gt Fallback value Last Good Value BER L Ae eee K Prime SG FB value Appears for Fallback value only Wizard Map Notes Edit Special equations No Yes gt See note 1 Edit Analog outputs No Yes See note 2 Edit User Alarms No Yes See note 3 Edit Multi view No gt See note 4 Exit Wizard 1 Route detours to the Special Equation wizard sequence before continuing 2 Route detours t
6. D type Page C 4 5x25 way D type for all connections except communications and power Separate 9 way D type connectors for communications 4 way Klippon connector for power Inputs Analog Pulse Time period Dens Visc Quantity Options Type Span selection Uncertainty Resolution Sampling time Temperature PRT Configuration Temperature range Uncertainty Resolution Sampling time Energisation Long term drift Quantity Options Pulse integrity checking Pulse interpolation Dual pulse chronometry Type Input trigger level Max voltage level Frequency range Quantity Options Range Accuracy Resolution Appendix C Technical data for the 7951 4 off each selectable as PRT PT100 or 4 20mA Option for extra 4 20mA inputs 7951MAA 38 Klippon 4 off 7951MAB 38 D type 6 off 0 4 to 20mA Unlimited keyboard selectable 0 008 of full scale at 25 C 0 001 C 20 bit 1 part per million 50ms per channel Using Analog Inputs 1 to 4 4 wire Power return line connected to Analog Input GND 200 C to 220 C for 100Q PRT 0 05 C 0 02 C 50ms per channel lt 1mA average Meets BS1904 amp IEC751 1mW in the PT 100 lt 20ppm per 1000 hours for first 1000 hours subsequently far less 7951MAA Klippon 1 single dual pulse flowmeter 7951MAB D type 2 single dual pulse flowmeter None IP 252 76 API Ch 5 5 Level A API MPMS Ch 4 6
7. Software version Pressure I7 Tag number Ms Chapter 12 Routine operation Level 2 menus Enter password Password b d See separate menus for information about configuration Time and date a Set cycle time bj Actual cycle time Kg System idle time m Menu structure Password time software version and unit ID Page 12 7 Chapter 12 Routine operation 12 3 Security and passwords For more information about setting and changing passwords and security in general refer to chapter 10 12 4 How you can edit displayed information The figure shows a typical display showing information about the inputs and outputs Scrolls up through the Channel through which the data is passing Toggles between 1 Location ID available units PRT Input 1 in this case 2 MODBUS ID 3 Nothing c a E PA PRT Input channel 1 z which is diepleyed 100 000 p A Takes you into game L units editing mode EY Location ID 0235 Set L j J gt e EN Toggles between LIVE and SET Scrolls down through the available units Value currently stored in this location Shows whether you have chosen Data location ID us the data to be LIVE Use the a key to Units if any or SET display Location ID MODBUS ID or nothing which you have chosen to be displayed Figure 12 1 A typical data display You can edit some of this information by e Mak
8. Dens tempA FB value i Dens tempB FB value Turn to oni Turn to Fallback value Exit wizard 4 Part 1 y Part 1 only page page Temperature Wizard Map Part 2 of 2 Page 10 21 Chapter 10 Configuring your instrument by using wizards 10 16 Pressure wizard This wizard configures the 795x for getting line pressure and or atmospheric pressure data Setup wizard 4 Pressure Edit Line Pressure No Yes p Edit Line Pressure Line press input chl Limits amp Fallback No lt Selection No k1 Yes gt mAinput1 gt Turn to J Part 2 mA input 2 Line press high Imt TuS i v Line press low Imt mA input 10 K P Y 1 K Line press step Imt Line press 100 Y Line press FB type K Line press 0 value K selection at Ve d EEE gt None y Analogue input n type Fallback Value Selection y Note Last Good Value n is the gt PT100 input number of Y the input 0 20mA input z Y channel Y Line press FB value Seid 4 20mA input earlier Appears for Tum to Fallback value Y Part 2 only Input channel n bola Pressure Wizard Map Part 1 of 2 Page 10 22 Chapter 10 Configuring your instrument by using wizards Sequence Atmospheric pressure from an analogu
9. Level 2 menus Line temperature Density A temp Density B temp Base temperature Absolute zero Limits Sensor readings Line pressure Atmos pressure Base pressure Limits Menu structure Temperature pressure and energy Chapter 12 Routine operation Level 3 menus Line temperature t Density A temp Density B temp KY Line temp reading DensA temp reading DensB temp reading m Line pressure L Atmos pressure Diff press hi Imt mm b Gc LI da a b Page 12 3 Chapter 12 Routine operation Page 12 4 4 Temperature L a Main Menu Flow totals Line density Base density SG Flow rates 6 a La Ra M Pressure Energy Raw gas data Custom application Health check Password Configure 3 q d 2 b d 1 J Level 2 menus A B L Carbon monoxide N Methane I Ethane Propane w n Butane Ky 4 i d i Butane n Pentane r i Pentane n Hexane m 4 n Heptane n Octane m n Nonane a Jg e n Decane Ky Hydrogen sulphide w CBT Nitrogen Carbon dioxide KY E K J Water 7 ater Helium mi Oxygen i Hydrogen Argon C6 mode KY New gas compos KJ Special eq1 value Special eq2 value die HD Level 3 menus Menu structure Raw gas data and
10. Chapter 7 The menu system Returning to the top level menu again there are menu choices that are common to all software versions Figure 7 5 In addition you ll encounter them in subsequent chapters All other menu choices on the Main Menu e g Flow rates are for operators to quickly find final measurements and other calculation results Chapter 12 has tables showing these menus in more detail Flow ratesb Flow totalsb DensityD L ViscosiyD Em Vv T Temperatureb Pressureb Batchingb Valvesb Leads to menus for viewing interim V results of measurements and other s calculations Inputs Outputs etc T pce ies 4 Leads to menus for editing See Chapter 12 fora full map amp Health checkD measurement tasks for your 4 Conf i gur e gt R installation See Chapters 8 11 Leads to a screen for oO Password TT Time gt 6 Leads to menus where you can d 3 ee S Software version view edit the time and date plus change security level Unit tag number machine cycle timing See Chapter 11 Leads to a screen where Leads to a screen detailing you can view edit text to the software version number identify the 795x Figure 7 5 Menus common to all software versions Page 7 4 8 1 8 1 1 8 1 2 Alarms Alarms Alarm types The types of alarms that are detected and recorded are System alarms caused by one or more of e Pow
11. LEFT ARROW RIGHT ARROW UP ARROW DOWN ARROW 0 9 buttons b button Moves the cursor to the left along the line of text you are editing Moves the cursor to the right along the line of text you are editing This button changes the character at the current cursor position It scrolls forwards through the alphanumeric character set Stop when the character you want is displayed Changes the character at the current cursor position It scrolls backwards through the alphanumeric character set Stop when the character you want is displayed Each button enters a single digit If you are satisfied with the changes you have made press D to accept the changes and go back to VIEW mode The ENTER button also does this Chapter 6 The keyboard display and indicators PE ENTER If you are satisfied with the changes you have made press ENTER to accept the changes and go back to VIEW mode The b also does this CLEAR This clears a line of text N BACK If you do not want to keep the changes you have made press the BACK button to abandon the changes and go back to VIEW mode l PLUS MINUS Toggles between lower and upper case letters 6 7 2 Multiple choice option selection Once in EDIT mode see earlier the keys that you use to select from a multiple choice list are A UP ARROW Scrolls up through the available options V DOWN ARROW Scrolls down through the available options b button If editi
12. None ADC indicates battery condition None Alarm annunciation Quantity Type Operation Options Security Mechanisms Indicator Options Power Supplies Input Output General instrumentation energisation Flowmeter energisation DAC energisation Options Appendix C Technical data for the 7951 3 one each for Input System or Limit alarms Red LED Flash indicates new alarm condition Steady indicates accepted alarm None 1 Switch located on front panel 2 Software code Bi colour LED on the front panel 1 RED Not secured 2 GREEN Secured 3 ORANGE Part secured None 21V to 30V de Unloaded 20W maximum Loaded 35W maximum 2A worst case start up current 1 x 24V nominal at 800mA Switchable voltages of 8V or 16V current limited to 120mA Isolated 25V output at 200mA None Page C 9 Appendix C Technical data for the 7951 C 6 Connections C 6 1 7951 D type Rear Panel PENA S e 9 ee e ESSA lt sx PL1 9 _ e SK4 SKB SK6 SK7 SK8 Pin 9 P a i dq Pin 14 Pin 13 9 Tt Pin 25 J Pin PL1 SK1 SK2 SK3 SK4 SK5 SK6 SK7 SK8 1 E Com 2 Rx Tx Com 3 Rx Tx Stat ip 1 Stat op 2 Turb 1 Ana op 1 PRT 3 pwr 2 E Com 1 Tx Com 2 Tx Com 3 Tx Stat ip 2 Stat op 3 Turb 1 Ana op 2 PRT 3 sig 3 Supply Com 1 Rx Com 2 Rx Com 3 Rx Stat ip 3 Stat op 4 Turb 2 Ana op 3 PRT 3 sig 4 Supply Stat ip 4 Stat
13. high L Selection K Selection 7812 N2 low Y mAinput 1 gt ga 7811 AR high a Ze Y Temp and VOS VOS mA input 2 p a 7811 N2 high Y y etc VOS 7811 N2 low mA input 10 T Y Temp 7810 CH4 medium T w Y None Jemp 7810 N2 low Line Dens B 100 Transducer B K18 y K Y 9 M C 7812 AR high 1 0 4 Line Dens B 0 This klTanseuest BK19 apppears Density B offset Line density B gamma Analogue input n type only ee am 079 a inputs 1 to 4 i K Selection Transducer B KS Appears for Y Fd BDO NUR i P method TransducerBK6 Fe h SEAS Note only 0 20mA input n is the rae a ey as G Y number of Transd B K3 i ransducer i 4 20mA input p ita Appears for K M E eed SG re L Transducer Ba Y earlier a QE ImpaEehannele K Density B offset 4 Wizard Map Notes page 1 The sequence for Temp and VOS correction includes the Temp Page 10 14 route followed by the VOS route 2 Density B offset appears after all sequences for the selected corrections have been completed Line density Wizard Map Part 1 of 3 Chapter 10 Configuring your instrument by using wizards Sequence Line density B measurement using PTZ1 method From Part 1 page Edit PTZ1 calculation No Yes gt Yes PTZ1 calc select b Selection AGA NX19 Y SGERG Y AGA NX19 mod3h Y AGA NX19 mod gt y K Base t
14. 1 Ib gal 1 Ib US gal 1 Ib in 1 atm 1 MPa 1 N m 1 mm Hg 0 1 in Hg 0 1 in 1 f 1 gal 1 US gal 1 US barrel 1 ft min 1 gal min 1 Ib hr 1 ton hr 1 BTU 1 kWh 1 therm F 1P 1 Ibf ft s or 1 pdl s ft 1 slug ft s or 1 Ibf s ft 1St 1 TTia Metric equivalent 25 4 mm 0 3048 m 0 45359237 kg 1016 05 kg 16 0185 kg m 99 7763 kg m 119 826 kg m 68 9476 mbar 1 013250 bar 10 bar 10 bar 1 33322 x 10 bar 33 8639 x 10 bar 16 8371 cm 0 0283168 m 4 54609 dm 3 78541 dm 0 158987 m 40 776 m day 6 5463 m day 10 886 kg day 1016 05 kg hr 1 05506 kJ 3 6 MJ 105 506 MJ 1 8 x C 32 0 1 Pas 1 48816 Pa s 47 8803 Pas 1 cm s 9 29030 dm s Page D 1 Appendix D Units and conversion factors Page D 2 Appendix E Data tables E 1 The tables Note The equations used to derive these tables are given in Section E 2 Density temperature relationship of crude oil Temp C 60 55 50 45 40 35 30 25 20 15 556 15 10 5 0 738 91 742 96 747 00 751 03 755 05 759 06 763 06 767 05 771 03 774 56 775 00 778 95 782 90 786 83 765 06 768 98 772 89 776 79 780 68 784 57 788 44 792 30 796 18 799 57 800 00 803 83 807 65 811 46 791 94 794 93 798 72 802 50 806 27 810 04 813 79 817 54 821 27 824 59 825 00 828 72 832 42 836 12 Density kg m 817 15 820 83 824 51 828 17 831 83 835 48 839 12 842 76 846 38
15. Appears for wizard Fallback value only Transmitter Wizard Map Part 2 of 3 Page 10 25 Chapter 10 Configuring your instrument by using wizards Sequence Live energy value from an analogue input From Part 1 page Live energy input K Selection gt mA input 1 Y ETE Edit Live Cv m mA input 2 N Limits amp Fallback 7 Y Exit wizard mA input 10 Yes Live energy high Imt Live energy 210096 E T g Y Live energy low Imt Live energy 0 K Live energy FB type Analogue input n type selection K Selection gt None Note gt PT100 input Y misme y Fallback Value number or 0 20mA input the input Y channel Y Last Good Value selected 4 20mA input earlier Alive energy FB value Input channel n l N Exit Appears for wizard Fallback value only Transmitter Wizard Map Part 3 of 3 Page 10 26 Chapter 10 Configuring your instrument by using wizards 10 18 Special Calculation wizard Setup wizard t Special Calc Edit Special equation 2 1 gt 2 gt 4 General equ const A Y K General equ const B Y General equ const X Y General equ const Y Y General equ ptr a Y Gene
16. Chapter 10 Configuring your instrument by using wizards Setup wizard t Wizard b key Heading Option n Option 1 gt Option 2 gt Option n Option 2 Option 1 K Programmable item Heading Selection Selection 1 i Selection 2 Y etc Selection n Exit wizard This represents the selection of the wizard Itis the start point for every wizard Pressing the b key or the enter key confirms the selection An arrow indicates where a wizard will continue to It may or may not have a label to identify a particular path the wizard is taking This format indicates a situation where there are two or more options Choosing any option herewill determine the subsequent path taken by the wizard Note that all of the options are always shown in this box However the 795x splits options into pages An item prompt that appears with the name of the item along with programmable properties a value units of measurement and present status Edit properties and then press the enter key for wizard to continue An item prompt with a dotted outline will not always appear A note alongside states the condition needed for it to appear The shaded areas indicate a situation where there are two or more options Choosing an option here may influence the subsequent path taken by the wizard Pressing the b key when this screen
17. Status display TCP IP Temperature Temperature correction Text descriptor Therm Appendix A Glossary S A viscosity measured using methods developed by the Saybolt company It is obtained by timing how long the fluid takes to flow out of a cup through a hole of known size The viscosity is expressed in units of time A code or password which a user must key in before being allowed access to all or part of a system Another name for a transducer A value is SET if it is keyed in by the user and does not change unless the user changes it See also Live A procedure for setting up or configuring a system See Specific gravity A device which converts one signal into another Its main use is in quality measurement systems such as brewing where the output is used by a control or monitoring system The mass per unit volume of a fluid See Base condition The condition of part of a system for example whether it is on off and so on A display which summarises the contents of the Historical log and gives an indication of the current status of the system T Abbreviation for Transmission Control Protocol Internet Protocol the suite of communications protocols used to connect hosts on the Internet TCP IP uses several protocols the two main ones being TCP and IP TCP IP is built into the UNIX operating system and is used by the Internet making it the de facto standard for transmitting data over networks Even n
18. b Value b K Std vol total o 3 Units c m Energy flow total TA v B u S amp A Gross flow total 7 A Selection name i 2 Alarm total b Value b Main turb error mM c v Prover turb error N d v M B LA Prime line density L 3j Selection name 7 3j Line density A b Value b Line density B Units c iva Relative density L m v Live or set K A RD value P Value b MM el v Live or set Wy m 4 DensA txdr reading 3j Selection name A 3 DensB txdr reading b Value b Density limits a Units Mg Selected densit 1 f V y d V 4 High limit j 9 Low limit bj g mec V N al j Selection name P7 9 Selection b E c V ES dq Prime base density a LA Prime base density n L 2 Prime SG b Value b gt 3 3 Base density A e Units c Base density B m Live or set v y 1 v I A Prime SG value 7 a Value b E C E Live or set L d Selection name la IES Value b Units o v Live or set S Menu structure Flow rates flow totals line density and base density SG Page 12 2 Main Menu Flow rates 7 Flow totals I Line density Base density SG I F Temperature l Pressure Energy WY Raw gas data N
19. t Source RR Select unit type Mm Range mM Limits Fallback vE Source 7 Line density 910096 L Line density 0 a Source K Base density 100 Base density 0 V mM j Select 7 J SG 100 l SG 0 v Jte v JEJL c Page 11 9 Chapter 11 Configuring by using the menus 11 8 Configuring flowmeter details LIVE RESULTS Input data Prime density VOLUME FLOW RATE CALCULATION gy Qm LIVE FIXED Input data Input data m l l Orifice Pipe lIsentropic Dynamic Tapping High Low diameter diameter exponent viscosity code MMC Line press MASS FLOW RATE LIMITS b CALCULATION ISO 5167 OR AGA3 Line temp Line density RESULTS Qm Beta Orifice discharge coefficient PRESSURE LOSS Velocity of approach factor CALCULATION Orifice expansibility factor Reynolds number Corrected pipe diameter Corrected orifice diameter LK Figure 11 9 Calculating orifice mass and volume flow rate Page 11 10 ALARM If limits are exceeded RESULTS Pressure loss LIVE Input data Main turbine GROSS VOLUME frequency m x3600 FLOW RATE LIVE Input data Main turbine TURBINE frequency LINEARISATION K factor Lin K curve Tr Kt Kp turbine temp press temp ref corrections corrections A K factor curve Frequency for flow factors 1 10 flow factors 1 10 K METE
20. 14 10 Mother Board Warning It is strongly recommended that in order to ensure continued compliance to EMC directives you do not attempt to remove the rear panel assembly but return the instrument to the factory 1 Remove the Rear Panel Assembly as described in Section 14 9 2 Referring to the diagram undo and remove the six screws and washers which fix the Mother board to the rest ofthe Rear Panel Assembly 3 Using a straight pull carefully lift the Mother Board clear of its four connections to the connector board The Mother Board is now free 4 Replace all items by reversing this procedure Take great care to ensure that the cables are not pinched on re assembly and ensure that the metal clips are not bent or damaged COMPLETE ASSEMBLY DISMANTLED ASSEMBLY Screws and Threaded Plain Rear washers spacers spacers panel x Y y m i I Ejo Gl ILE LT B 1 cil il I 4 A Mother Connector Rear Earth stud Board Board Panel and fixings Figure 14 7 Removal of the Mother Board and Connector Board Page 14 6 Chapter 15 Assembly drawing and parts list 15 Assembly drawing and parts list 15 1 What the drawing and parts list tell you The drawing and parts list show those parts of the 7951 which you can obtain as spares To identify an item 1 Find the item on the appropriate assembly drawing 2 Note the Item Number
21. 14 7 Fuse 14 8 Back up battery 14 9 Rear Panel Assembly 14 10 Mother Board 15 Assembly drawing and parts list 15 1 What the drawing and parts list tells you 15 2 How to obtain spare parts Appendices Appendix A Glossary AppendixB Blank wiring schedule AppendixC Technical data for the 7951 12 1 12 1 12 1 12 8 12 8 12 10 12 11 12 11 12 11 12 11 12 12 12 12 13 1 13 1 13 1 14 1 14 1 14 1 14 2 14 2 14 3 14 3 14 3 14 4 14 5 14 6 15 1 15 1 15 1 A 1 B 1 C 1 Appendix D Appendix E Appendix F Units and conversion factors Data tables Calculations and theory D 1 E 1 F 1 1 1 1 2 1 3 Chapter 1 About this manual About this manual What this manual tells you This manual tells you how to install configure operate and service the instrument In addition some information is given to help you identify and correct some of the more common faults which may occur However since repairs are done by changing suspected faulty assemblies fault finding to board component level is not covered This manual assumes that all devices or peripherals to be connected to the 795x have their own documentation which tells you how to install and configure them For this reason it is assumed that anything which you want to link to the 795x is already installed and working correctly in accordance with the manufacturer s instructions Since the instrument can be used for a wide varie
22. 849 60 850 00 853 61 857 20 860 79 843 11 846 68 850 25 853 81 857 36 860 90 864 44 867 97 871 49 874 61 875 00 878 50 882 00 885 49 869 01 872 48 875 94 879 40 882 85 886 30 889 73 893 16 896 59 899 62 900 00 903 41 906 81 910 21 Density temperature relationship of refined products Temp C 60 55 50 45 40 35 30 25 20 15 556 15 10 5 0 605 51 610 59 615 51 620 49 625 45 630 40 635 33 640 24 645 13 649 46 650 00 654 85 659 67 664 47 657 32 662 12 666 91 671 68 676 44 681 18 685 92 690 63 695 32 699 48 700 00 704 66 709 30 713 92 708 88 713 50 718 11 722 71 727 29 731 86 736 42 740 96 745 49 749 50 750 00 754 50 758 97 763 44 Density kg m 766 17 769 97 773 75 177 53 781 30 785 86 788 81 792 55 796 28 799 59 800 00 803 71 807 41 811 10 817 90 821 49 825 08 828 67 832 24 835 81 839 37 842 92 846 46 849 61 850 00 853 53 857 04 860 55 868 47 872 00 875 53 879 04 882 56 886 06 889 56 893 04 896 53 899 61 900 00 903 47 906 92 910 37 894 86 898 24 901 80 904 96 908 32 911 67 915 01 918 35 921 68 924 63 925 00 928 32 931 62 934 92 918 99 922 46 925 92 929 38 932 84 938 28 939 72 943 16 846 58 949 62 950 00 953 41 956 81 960 20 Appendix E Data tables 920 87 923 95 927 23 930 50 933 76 937 02 940 28 943 52 946 77 949 64 950 00 953 23 958 45 959 66 969 45 972 87 976 28 9
23. Figure 11 40 Where to enter passwords Chapter 11 Configuring by using the menus 11 18 Configuring Multiview From Configure option on Main Menu Y Menu level 2 Menu level 3 m D L Wizards 7 9 Display line 1 7 8 j Line 1 text 7 Analogue inputs 7 b Display line 2 Line 1 parameter b Flowmeter details Al Display line 3 c Transd detail Display line 4 EM 776070758 EN play NM LS d CES EET L Transmitter details 7 Line 2 text a Flow rate amp b Line 2 parameter bj Totalisers c Wo Line density I 7 E f E 29 Base density r en LAJ Line 3 text a Compressibility b Line 3 parameter b Specific gravity ol m Energy en v T d P 4 p L N Custom application ke l 8j l J Line 4 text 7 a mA outputs b Line 4 parameter b Other parameters c iv Multi view f d v N dl Figure 11 41 Menu structure for configuring Multiview What is Multiview Multiview often referred to as the User Display is a display which you define to show whatever information you want It consists of up to four lines which comprise either or both of e Text such as the name of a parameter at the left of the line e A value for a parameter at the right of the line You can change the configuration of Multiview displays whenever you wish An example of a typical Multiview display is shown on Page 11 37 How to get i
24. In non secure mode anyone can have access to any of the facilities In securable mode access to facilities can be protected by passwords Changing security mode On the 7951 you change the security mode by using the key switch on the front of the instrument The instruments are normally securable but when you insert the key and turn it clockwise this changes the mode to non secure You can only withdraw the key in the vertical securable position os 1 Security Level LED 2 Security Lock Figure 11 39 The security lock on the 7951 Security levels The password system restricts access to its facilities to those people with certain levels of authority There are four levels of security e Calibration e Engineer e Operator e World anyone other than those listed above The table below lists what facilities each of these groups can access Access levels Facilities available Programmer Engineer Operator World Calibration facilities Programmable parameters except security codes Security codes How the security LED RED flashing ORANGE GREEN appears Note Some versions of 795x software do have a Operator level that can change limits Switching between levels This is achieved by selecting the Password option from the main menu and then entering the appropriate security code for the level required A correctly entered security code will cause the access the level to change However an incorrectly
25. Temperature wizard to configure the system In this example the Temperature wizard is used to configure connections as follows e A single temperature transmitter is connected to Analogue Input 3 Now work through the example by following the instructions below If you are not sure where the buttons are refer to the diagram at the start of this chapter Connect the 1 Wire the temperature transmitter to the 7951 as in Figure 2 10 meter 2 Earth the 7951 to a suitable earth point EMC Notes To meet the EC Directive for EMC Electromagnetic Compatibility it is recommended that the Flow Computer be connected to transducers using a suitable instrumentation cable containing individually shielded twisted pairs and an overall screen to cover all cores The instrumentation cables should have individual screen s foil or braid over each twisted pair and an overall screen to cover all cores Where permissible and depending on the earthing scheme employed at the installation the overall screen should be connected to the earthed metal work at both ends 360 bonding where possible This may have multiple protective earth connections to the pipe work or the building structure and not connected to the individual screen s or Instrumentation or Zener barrier grounds The individual inner screen s should be connected at one end only normally the controller e g Flow Computer end These should be connected to the Instrumentation or
26. o ext From Configure option on Main Menu Wizards Analogue inputs Flowmeter details v Transducer details 4 r Transmitter detail P7 Flow rate Totalisers KW v1 Line density N m c a A Base density ls Specific gravity Energy Vv Custom application N BER mA outputs n l Other parameters Multiview f a jla Jew 2m AR Se em m o 11 17 Configuring other parameters Display formats Communications Alarms Display contrast Security Computer cal Calibration code a o lo v 5 Differential press I A cal Fraction N 4 Mi 4 l ae ls AR Mn Temperature Fr fi Temperature offset m Pressure Atmos pressure ra Density Period KY Time General Frequency Flow factor Standard volume P7 Volume Energy Calorific volume Calorific mass Mass Mass rate Volume rate Energy rate Std volume rate Gas fraction Length Port 1 Port 2 Port 3 ms Limit alarm X Limit alarm Y Comparison alarm A L Figure 11 38 Menu structure for configuring other parameters a l ls 2 A tos i ey Mon Jie jlo m Jie c L d 4 Alarm logger 7 9 Alarm total ptr e b T c d Display contrast 7 3 Level 1 10 b Ec Id a nance al
27. 11 Configuring by using the menus From Configure option on Main Menu T A Page 11 28 4 Transmitter detail L Analog inputs Flowmeter details Transducer details Wizards 7 mL m Flow rate Totalisers A ase density Specific gravity Energy Line density I Custom application N L B et f a jlo SR L m a jlo Prime value Prime selection Specific gravity A Specific gravity B Mass of air Fallback Limits SG prime value kel Value m T Prime SG sel t Selection po SG A value t Value aay Live or set N Value F l Calc select mM M of air F t Value m L Value Mode m LM Low Step KY Comparison MJ L Figure 11 30 Menu structure for configuring specific gravity Live or set High 7 11 14 Configuring energy Chapter 11 Configuring by using the menus LIVE Input data SG AGA5 Cm co2 ENERGY CALCULATION N2 RESULTS 4 20 mA P c Analogue input 1 Select TE mA Cmiv i and ENERGY Select Energy Analogue input 10 status CALCULATION FIXED Select 0 100 Input data Parameters see below Cv 1S06976 ENERGY CALCULATION RD Figure 11 31 Calculating energy LIVE FIXED Input data RESULTS Input data Select mass or volume Cv Qe v m Cm CALCULATE cree Qs ENERGY RATE URS Qm Figur
28. 2 Getting started Barrier as defined in the latest 3096 3098 7951 3096 3098 specification Klippon D type PL5 9 SK6 22 PL5 5 SK6 18 PL5 6 SK6 19 PL5 10 SK6 24 Intrinsically Safe Earth Figure 2 7 Hazardous area wiring for a 3096 3098 Turn on the Turn on the power to the system The system goes through a Power On Self Test power POST routine which takes less than 30 seconds When it is finished ignore any flashing alarm lights which may appear Go to the Press the MENU button to go to Page 1 of the Main Menu if you aren t there already wizards menu Press the DOWN ARROW button twice to go to page 3 of the menu Press the b button to select Configure Press the a button fwice to go to the wizards menu Clear existing Press the b button then the UP ARROW or DOWN ARROW button to scroll through the configuration option list until Initialise is shown This is optional 9 Press the b button to select Initialise 10 Press the d button to confirm that you want to lose the current configuration 11 Wait a few seconds until initialise on line 2 of the display changes back to Choose option Select the 12 Press the b button then the UP ARROW or DOWN ARROW button to scroll through wizard the option list until SG 1 is shown 13 Press the b button to select SG 1 Start of wizard 14 Press the d button to answer YES to the question Edit Gravitometer A Enter 15 Press t
29. 21 Press the ENTER button twice to select this PRT type input 22 Press the d button 23 Press the UP ARROW button so that Set has changed to Live 24 Press the ENTER button twice 25 Press the c button several times to answer NO to all further questions until the wizard is exited 26 Press the MENU button 27 Press the d button and then press the a button The display looks similar to that shown in Figure 2 15 although values shown may vary Line temperature 15 000 Deg C Live Figure 2 15 Line temperature display End of Worked Example 5 Page 2 15 Chapter 2 Getting started Page 2 16 3 1 3 2 Chapter 3 About the Micro Motion 7951 About the Micro Motion 7951 Background The Micro Motion 7951 is designed to meet the demand for a reliable versatile user friendly and cost effective instrument for liquid and gas metering It has a Motorola 68332 32 bit microprocessor and surface mounted circuit board components so that it is powerful reliable and compact Features of the 7957 include e Simple access to information e Comprehensive interrogation facilities e Alarm and alarm history facilities e Amenu driven user friendly interface e NEMA12 IP52 panel mounted case s Dc powered e Three serial ports using RS232 or RS485 for Modbus communications and printing These facilities are described in more detail in the rest of this chapter What the 7951 Dual Channel Gas Signal Co
30. 795x coefficients for Cg VOS calculation Coefficients to enter Coefficients to enter Molecular for density less than or for density greater than equal to 100 Kg m 100 Kg m Air 28 96469 Argon 39 9480 i 7 21 10 54 7 10 1 46 10 6 Carbon Monoxide 28 01055 6 14 10 31 0 109 S Carbon diixide 44 00995 2 05 10 18 7 10 0 38 10 2 22 10 Ethane 30 07012 42 66 10 830 10 0 66 10 8 95 10 Ethylene 28 054 4 78 10 52 9 10 5 49 10 6 50 105 Helium 4 00260 i 77 3 10 782 4 109 Heptane 100 20557 0 Hexane 86 17848 0 Hydrogen 2 01594 0 Hydrogen sulphide 34 07994 0 0 Methane 16 04303 4 75 10 0 824 10 4 75 10 0 824 10 Nitrogen 28 01340 5 25 10 28 6 10 2 66 10 4 49 10 Octane 114 23266 0 0 0 0 Oxygen 31 9988 2 50 10 11 08 10 Propane 44 09721 109 10 4055 10 5 88 10 6 16 10 Propylene 42 081 200 10 8410 10 ISO Butane 58 12430 A 2042 10 0 4685 10 67 10 13 7 10 Neo Butane 58 12430 2042 10 0 4685 10 67 10 13 7 10 ISO Pentane 72 15139 0 0 0 0 Neo Pentane 72 15139 i 0 0 0 0 Note Gas Density range Carbon Monoxide 0 100 Kg m Carbon dioxide 0 200 Kg m Helium 0 75 Kg m Oxygen 0 100 Kg m Propylene 0 20 Kg m Ethylene 0 350 Kg m i e where density could exceed 200 Kg m use KB 0 66 10 and K6 6 50 10 1 T at Normal conditions Page F 3 Appendix F Calculations and theory Equation F 1 3b V O S of the measured gas
31. Chapter 11 Configuring by using the menus 11 7 Configuring transmitter detail LIVE Input data PT100 or 4 20mA PRT Analogue input 1 if Select i source P l ae TEMPERATURE status _ CALCULATE REFERRAL TEMPERATURE Orifice only Analogue input 10 9 f 096 100 Un referredtemp Referral select FIXED Input data Limits Fallback Offset High Low Step mode value RESULTS Line Temperature A TEMPERATURE OFFSET LIMITS FALLBACK ALARM if limits are exceeded Figure 11 4 Calculating line temperature Page 11 6 Chapter 11 Configuring by using the menus LIVE Input data PT100 or 4 20mA Analogue input 1 PRT Select source dip TEMPERATURE status _ CALCULATE REFERRAL A J TEMPERATURE Orifice only Analogue input 10 E 0 100 Un referred temp Tpos FIXED Input data Limits Fallback Offset High Low Step mode value RESULTS A TEMPERATURE oe OFFSET LIMITS FALLBACK ALARM if limits are exceeded Figure 11 5 Calculating densitometer temperature LIVE FIXED Input data Input data Values Limits Fallbacks ALARM 0 0 i 4 20 mA 0 100 High Low Step value mode f limits are exceeded Analogue input 1 Ges S gt RESULTS value Er PRESSURE I LIMITS FALLBACK Pressure Analogue input 10 status Figure 11 6 Calculating prover or atmospheric pressure Page 11 7 Chapter 11 Configuring by using the menus LIVE Input data 4 20 mA
32. Pointer d 7 2 Base density Specific gravity Pointer e b Energy Pointer f c f Custom application j Text EN Zaren am v 7 rm Value F l a Constant A b Constant B 6 E Constant C TEM A Pointer 7 t x Text b m cl V w d Figure 11 35 Menu structure for configuring custom applications Page 11 31 Chapter 11 Configuring by using the menus 11 16 Configuring mA outputs Values 0 Pointer Mode FIXED Input data Filter Um ae eee From Configure option on Main Menu o y A J LA J Page 11 32 a Wizards Transducer details Transmitter detail P Analog inputs Flowmeter details Flow rate I Totalisers Line density wy Specific gravity Energy KY E Custom application M mA outputs t Other parameters Multiview Figure 11 37 Menu structure for configuring mA outputs vA b c d a bj Base density F 3 o Je Jim a JE a o 3 mA ANALOGUE OUTPUT Analog output 1 Analog output 2 Analog output 3 Analog output 4 Analog output 5 Analog output 6 Analog output 7 Analog output 8 Cycle time Figure 11 36 mA outputs eg ue dedo Filter 7 mA output Value Range Pointer Type mem EAS Filter 9 Value Range Pointer Type TS Cycle time SERES Eam
33. Programmer passwd k Engineer passwd bj Operator passwd al World passwd Instrument cal P7 2 Type of cal b c d Calibration code E Chapter 11 Configuring by using the menus Page 11 33 Chapter 11 Configuring by using the menus What the Other parameters option does Selecting Other parameters brings up the following options Display formats Lets you specify for each parameter The units which are used together with the number of decimal places or exponential format for the value e Alarms Alarms are dealt with in chapter 8 s Communications Lets you set up all aspects of communications including the function of each port baud rates character formats handshake protocol MODBUS parameters slave address dialect and mode e Display contrast Lets you set the contrast between the text and background on the display Contrast is on a scale of 1 10 the higher the number the darker the contrast e Security Use this option to set passwords This is explained later in this section e Computer calibration This is used to calibrate instruments connected to the 795x DO NOT CHANGE THESE SETTINGS UNDER ANY CIRCUMSTANCES IF YOU DO YOU CANNOT CHANGE THEM BACK WITHOUT USING SPECIALISED CALIBRATION EQUIPMENT Page 11 34 Chapter 11 Configuring by using the menus Passwords and security Securable and non secure modes The 7951 can work in a non secure or securable mode
34. Pulse count maximum rise time 80ms 0 5V RMS 1 2V p p 30V 0 to 5kHz dual pulse train minimum pulse width 100us 0 to 10kHz single pulse train minimum pulse width 50us 4 None 100us to 5000us 1ns typically 10ns worst case 2ns at 1kHz for 1 second sample Page C 5 Appendix C Technical data for the 7951 Digital Status Outputs Analog Page C 6 Input trigger level Input impedance Quantity Options Input voltage required Update rate Special Notices Quantity Options Type of output Power Maximum loop impedence Type Zero offset Span selection Accuracy Resolution Output impedence Output representation Update rate Isolation Long term drift Special Notices 0 5V RMS 1 2V p p Maximum 30V 10kQ nominal 7951MAA Klippon 6 off 7951MAB D type 10 off Option for extra status inputs 7951MAA Klippon O off 7951MAB 38 D type 8 off 5 to 24V per channel opto isolated 0 5ms for prove detect others 250ms maximum Status Inputs 1 and 2 are fleeting contact ball detectors for prover interface opto isolated They can also be used as normal status inputs 4 Option for extra 4 20mA analogue outputs 7951MAA 38 Klippon 4 off 7951MAB 38 Klippon 4 off Current powered by 7951 One 24V supply with capacity for 8 outputs 25mA each 1KQ 0 4 to 20mA selectable 20 or 0 keyboard selectable Unlimited keyboard selectabl
35. Selection Map After using the menu to arrive at the units wizard sub menu as shown earlier in Figure 10 1 a wizard option can be chosen Selection Procedure Press the b button to begin the selection process Use the UP DOWN ARROW buttons to cycle through all the available unit wizard options Press either the b button or the ENTER button to select the unit wizard option that presently appears on the 795x display gt Selecting this with the b key starts the units selection process Use the up down keys to move through the e Nonas options and then press the b key or the enter key to Selection confirm the selection Choose option E We Metric Metric i Imperial Wore sh Imperial Exit wizard A Y sj SI Figure 10 4 Units Wizard Selection Page 10 5 Chapter 10 Configuring your instrument by using wizards 10 7 Density 1 application wizard Setup wizard H 2 Y AaS densi IN Nod gt Transducer A KO Y Yes K Transducer A K1 Y No Transducer A K2 Edit n Dens Temp A IM at No Yes gt Edit Special equations See note 2 No Yes gt Edit Density TP Limits amp Fallback No No Yes gt Exit Wizard No Edit Analog outputs K Line density hi Imt Y No Seenote 3 Line density lo Imt Yes Yes gt No Prime de
36. TP Y RD mM Y TTE earlier Dens tempA 100 K Dens tempB 100 v v K Line temp 100 v Line temp 0 Dens tempA 0 K Dens tempB 0 Input channel n K Inputchannel n Input channel n Turn Turn r Turn Part 2 Part 2 Part 2 page page page Temperature Wizard Map Part 1 of 2 Page 10 20 Edit Temperature Limits amp Fallback No gt Yes gt Yes K Line temp high limit Y K Line temp low limit y K Line temp step limit v Line temp FB type K selection None Y Fallback Value Y Last Good Value the Appears for e Appears for Fallback value Chapter 10 Configuring your instrument by using wizards From From Part 1 33 Part 1 page page Edit Dens Temp A Edit Dens Temp B 24 Limits amp Fallback No Limits amp Fallback No gt 5 No gt Turn to gt en Yes Turn v Yes page Yes page Yes Dens tempA high Imt Dens tempB high Imt Y Y Dens tempA low Imt Dens tempB low Imt Y Y Dens tempA step Imt Dens tempB step Imt Dens tempA FB type Dens tempB FB type K selection K selection None None y Y Fallback Value Fallback Value Y Y Last Good Value Last Good Value
37. and replacement of parts 14 8 Back up battery 1 mE NEL UM EE CET Ensure that the unit is disconnected from all power supplies Ensure that a new battery CR2430 and a thin edged non conductive implement are within easy reach Undo the six captive screws which attach the front panel assembly to the case Carefully lift the front panel assembly away from the case Undo the yellow and green Earth lead from the panel Do not undo the connecting ribbon cables Locate the back up battery on the Processor Board Referring to the diagram below use a non conductive implement to gently lever the battery upwards from near the rear of the clip As soon as the battery lifts up a small amount gently ease the battery in a horizontal direction away from the holder and the clip Keep the battery in contact with the clip DO NOT LIFT UP THE CLIP MORE THAN NECESSARY TO MOVE THE BATTERY Keep the battery in contact with the clip until you are prepared to insert a new one When the clip loses contact with the battery there is a maximum of 10 seconds before all configuration and database information is lost Once prepared remove existing battery and then slide the new one under the clip and into the holder observing the polarity symbols Complete this action within 10 seconds 10 Replace all items in the reverse order of removal Page 14 4 ner vr P 2 gt Battery Processor 4 Board E Clip 4 contact U Batter
38. can connect to a 7951 4 What you can connect to a 7951 The information in this chapter has been moved to Appendix C Page 4 1 Chapter 4 What you can connect to a 7951 Page 4 2 5 1 5 2 5 3 5 4 Chapter 5 Installing the system Installing the system What this chapter tells you This chapter gives full instructions for installing the 7951 It does not go into detail about how to install any peripheral devices such as transducers computers or printers which are connected to the 7951 For this information you must refer to the documentation supplied with these items Hazardous and non hazardous environments Caution Always refer to documentation supplied by the manufacturer for details of installing their equipment in a hazardous area The 7951 is neither intrinsically safe nor explosion proof and can therefore only be used in a designated non hazardous safe area If all or part of an installation is in an area where there is the risk of fire or explosion which is almost always the case when gases are involved then safety barriers or galvanic isolators usually have to be wired into the circuit However some instruments are explosion proof and barriers are not therefore needed Installation procedure Briefly the procedure is Step 1 Draw up a wiring schedule Step 2 Unpack the 7951 Step 3 Set the DIP switches Step 4 Fitthe 7951 Step 5 Make all external connections Step 6 Earth the i
39. custom application Gas type Value Units C6 mode Enter comp data State Gas data update T Main Menu N Flow rates 4 Flow totals Line density V Base density SG N i l L N J Temperature Fr Pressure m Energy v Raw gas data L A J Custom application Health check Password B Configure LIA la THA ed lajlo leje Level 2 menus Menu structure Health check Part 1 Chapter 12 Routine operation Level 3 menus j Turbine inputs Turbine freq L 8j Orifice inputs Turbine error lt b Time period inputs Turbine Pulses V Analog inputs Turbine Errors w E A a DP value J Selected DP cell b c Ka gs LA Time period P 11 amp gt Time period I P 2 b Time period I P 3 Kg Time period P 4 L m Lv p Analog input 1 77 3 Analog input 2 b Analog input 3 o EUH Analog input 4 L PL T LA J mA input 5 8 mA input 6 7 b mA input7 o iv mA input 8 i Wd J mA input 9 3j mA input 10 b mt c Lv m d x 4 LS Status inputs Sj A Status inputs mA outputs b 16 binary digits b Status outputs a c V User alarms m M dl L j mA output 1 la L 3 mA output 2 7 bj mA output 3 c f mA output 4 L Eu cr m mu ke To Part 2 AJ mA out
40. density B data Setup wizard Base density Base density B prime selection Automatic A K SG Prime value Y K Base density of Air Auto Follow A a B route Edit Base density Limits amp Fallback No No gt Yes gt Yes Base density hi Imt Y K Base density lo Imt Y K Basedensity comp Imt Y Base density FB type K Selection i Fallback value y Last Good Value Exit wizard Appears for Fallback value only Base density B selection PTZ1 gt Analogue input gt Analogue input Edit Line density B analogue input No gt No Base den B input chl K Selection r mA input 1 mA input 2 v etc mA input 10 Y Base Dens B 100 Y K Base Dens B 0 v Analogue input n type K Selection 0 20mA input Y 4 20mA input A Input channel n Base density Wizard Map Part 1 of 2 Page 10 16 This apppears only for mA inputs 1 to 4 Note n is the number of the mA input selected earlier Chapter 10 Configuring your instrument by using wizards Sequence Base density B measurement using the PTZ1 method From Part 1 1 o EN Part 1 Edit PTZ1 calculation No gt Yes gt Yes PTZ1 ca
41. e If the 7951 is on its own or in a small installation with one common earth for chassis and instrumentation In this case you must leave the link intact so that the chassis and instrumentation are earthed to the same point Top of instrument case III Socket Rear Processor Mother Link SK1 Panel Board Board Figure C 3 Where to find the link on the connector board Page C 15 Appendix C Technical data for the 7951 Earthing requirements for group 2 connections only The status inputs do not have to be earthed because the circuitry contains only opto electrical components Earthing requirements for group 3 connections only These depend on what sort of installation you have and the environment in which it operates You therefore have to decide what earthing arrangements you need It is likely that this group has to be earthed at a zener barrier earth For further information refer to the documentation for the external devices which are connected to the installation Page C 16 Appendix D Units and conversion factors Appendix D Units and conversion factors The figures in the following table are taken from BS 350 Part 1 March 1974 Parameter Length Mass Density Pressure Volume or capacity Volume flow Mass flow Energy Temperature Viscosity dynamic Viscosity kinematic Imperial units 1 inch 1 foot 1 Ib 1 ton 1 Ib f
42. for KO K1 K2 K18 and K19 Page 2 4 Chapter 2 Getting started View the Multi 26 Press the MULTI VIEW DISPLAY button The display looks similar to that in Figure view display 2 5 although values shown may vary 27 Pressing the DOWN ARROW button results in the message Invalid Multiview Page This appears because it is possible to have more than one Multiview page and it is simply saying that no more pages exist In this case only four items are defined and they fit on one page Pressing the UP ARROW button makes the previous page to re appear Note that it may be necessary to press the UP ARROW button several times before the first Multi view page appears From Multi view key T A Density 0 000 Temp 0 000 Pressure 0 000 B Mass rate 0 000 I 2 Jo so P Invalid Mulivew 7 Page wN a jlo a o Figure 2 5 Multi view display End of Worked Example 1 Page 2 5 Chapter 2 Getting started 2 5 Example 2 7951 with a 3096 3098 Gas Specific Gravity Meter About this example This example shows you how to connect a 3096 3098 to the 7951 and then use the SG 1 wizard to configure the system In this example the SG 1 wizard is used to configure a connection as follows e A single 3096 3098 is connected to Density Input 3 Work through the example by following the instructions below If you are not sure where the buttons are refer to Chapter 6 Conn
43. of substances of which it is a part The duration of one cycle of a wave form equal to the inverse of the frequency A highly accurate thermometer based around a coil of very pure platinum wire which is extremely stable over time It can be used instead of an analogue input to the signal converter or flow computer See Power on self test A standard routine which an item of equipment goes through when it is powered up to make sure that it is operating correctly The progress of the test is usually shown on the instrument display Another name for Chassis earth See Platinum resistance thermometer The measured pressure of the fluid in the pipeline A variable such as time or distance which is directly measured Pounds per square inch Imperial units of pressure An output of single pulses sent to equipment such as pulse summators or electro mechanical totalizers See Primary variable R Interference from sources which transmit at radio frequencies that is frequencies in the range of about 100kHz to about 300GHz A dimensionless constant given by Re woe von Where v fluid viscosity length v kinematic viscosity p density See Radio frequency interference An international standard for serial data transmission It specifies voltage levels timing and control Saybolt viscosity Security code Sensor Set Set up routine SG Signal converter Specific gravity Standard condition Status
44. op 5 Turb 2 Ana op 4 PRT 3 pwr 5 Com 0V Com 0V Com 0V Stat ip 5 Stat op 6 Turb 3 Ana op 5 PRT 4 pwr 6 Stat ip 6 Stat op 7 Turb 3 Ana op 6 PRT 4 sig 7 Com 2 CTS Com 3 CTS Stat ip 7 Stat op 8 Turb 4 Ana op 7 PRT 4 sig 8 Com 2 RTS Com 3 RTS Stat ip 8 Stat op 9 Turb 4 Ana op 8 PRT 4 pwr 9 Com 2 Rx Tx Com 3 RX Tx Stat ip 9 Stat op com Ana ip 5 10 Stat ip com Pulse op 1 Turb pwr Ana op com Ana ip 5 11 Pulse op 2 Turb pwr Ana op com 12 Alarm NO Pulse op 3 Turb pwr Ana op com 24V dc 13 Alarm com Pulse opcom Turb pwr Ana op com OV dc 14 Stat ip 10 Stat op 10 Den 1 PRT 1 pwr Ana ip 6 15 Stat ip 11 Stat op 11 Den 1 PRT 1 sig Ana ip 6 16 Stat ip 12 Stat op 12 Den 2 PRT 1 sig Ana ip 7 17 Stat ip 13 Stat op 13 Den2 PRT 1 pwr Ana ip 7 18 Stat ip 14 Stat op 14 Den 3 PRT 2 pwr Ana ip 8 19 Stat ip 15 Stat op 15 Den 3 PRT 2 sig Ana ip 8 20 Stat ip 16 Stat op 16 Den 4 PRT 2 sig Ana ip 9 21 Stat ip 17 Stat op 17 Den 4 PRT 2 pwr Ana ip 9 22 Stat ip 18 Stat op com 24V dc Ana op com Ana ip 10 23 Stat ip com Pulse op 4 24V dc Ana op com Ana ip 10 24 Pulse op 5 OV dc Ana op com 24V dc 25 Alarm NC Pulse op pwr OV dc Ana op com OV dc Page C 10 C 6 2 7951 Klippon Rear Panel Appendix C Technical data for the 7951 PL2 PL4 PES PL6E PL7 PLS Pin 1 Pin 10 Pin PL1 SK1 SK2 SK3 1 E Com 2 Rx Tx Com 3 Rx Tx 2 E Com 1 Tx Com 2 Tx Com 3 Tx 3 Supply Com 1 Rx Com
45. start configuration e clear the memory of details of any existing configuration OPTIONAL e select the appropriate wizard to configure the simple system e work through the wizard and button in information e view the results of your configuration The examples do not give full instructions on how to fit and configure installations They are intended purely to give you confidence to install and configure your own equipment Chapter 5 tells you how to make permanent installations If you need help If you get into difficulties If you get into difficulties when using the wizards you can abandon the configuration and start again as follows 1 From the menu keep selecting NO usually by pressing the c button or if that option is not available 2 Press ENTER until you can start selecting NO 3 Carry on with 1 and 2 until you return to the wizards menu where you started 4 Start the worked example again The configuration you abandoned is cleared from the instrument s memory when you begin again If you don t know where the buttons are Chapter 6 shows how to find all the buttons referred to in the worked examples Page 2 1 Chapter 2 Getting started 2 4 Example 1 7951 with a 7810 11 12 gas density meter About this example This NON HAZARDOUS SAFE AREA ONLY INSTALLATION example shows you how to connect either a 7810 7811 or 7812 gas density meter to the 7951 and then uses the Density 1 wizard to configure the syste
46. the Historical Log tell you 8 1 7 Clearing all alarms in the Historical Alarm Log 8 1 8 Alarm messages Additional facilities What this chapter tells you Selecting units and data formats Limits Fallback values and modes 5 4 5 6 5 6 5 8 6 1 6 1 6 1 6 2 6 2 6 2 6 3 6 4 6 4 6 5 6 5 6 6 6 7 6 7 6 8 7 1 7 1 7 1 7 1 8 1 8 1 8 1 8 1 8 2 8 2 8 3 8 3 8 4 8 4 9 1 9 1 9 1 9 1 9 2 9 5 9 6 9 7 10 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10 10 10 11 10 12 10 13 10 14 10 15 10 16 10 17 10 18 10 19 10 20 10 21 10 22 11 11 1 11 2 11 3 11 4 11 5 11 6 11 7 11 8 11 9 11 10 11 11 11 12 11 13 11 14 11 15 11 16 11 17 11 18 Analogue 0 and 100 values Live and set data Units which the 7951 can display Configuring the instrument using wizards What this chapter tells you Wizards Configuring the easy way Wizard Maps Conventions used Quick start Guide Set up Wizards Set up wizard selection map Units wizard selection map Density 1 application wizard Density 2 application wizard SG 1 application wizard SG 2 application wizard SG 1 amp 2 application wizard Line density wizard Base density wizard Specific gravity wizard Temperature wizard Pressure wizard Transmitter wizard Special calculation wizard Analogue outputs wizard Alarms wizard Multi view wizard Full setup wizard Configuring the 7951 using the menus What does
47. the buttons do Part 1 of 2 the first page of the top level menu Goes to the first page of the previous menu Toggles the location ID display on and off Goes into EDIT mode Goes into unit selection editing mode See also up and down arrow buttons Toggles between LIVE and SET if appropriate Goes to a menu for Alarms Events Flow Status and Operating Mode Goes to a menu for setting up and printing reports plus data archiving Goes to the defined MULTI VIEW display Cancels changes and reverts to VIEW mode Does nothing Accept changes and go into VIEW mode Does nothing Does nothing Accept changes and go into VIEW mode Does nothing Does nothing Does nothing Does nothing BUTTON moving around the menus Software dependent function key F1 ENTER pe Does nothing LEFT ARROW E 5 Does nothing T i zl Does nothing Does nothing DOT E 1 Does nothing E ne 5 Does nothing EXPONENT Does nothing Ee Does nothing Does nothing WHAT THE BUTTON DOES WHEN in VIEW mode Software dependent function key F1 Does nothing Does nothing Does nothing Does nothing Does nothing Does nothing Does nothing Selects another stream run if more than one is supported Does nothing Chapter 6 The keyboard display and indicators in one of the following EDIT modes Text editing Multiple choice opti
48. to help you trace the cause of the problem A complete list of alarm messages and what they mean is on page 8 3 8 1 7 Clearing all entries in the Historical Alarm Log To clear all the alarm entries in the historical log press the CLR button This clears all entries in the Historical Alarm Log zeroes the entries in the Status Display and sets all LED indicators to OFF 8 1 8 Alarm Messages Alarm message Type What it means AGAS calculation could not be completed due to a problem AGAS failed Input Additional alarm message letters C Composition L Line B Base Temperature and pressure are outside the range that can be handled by AGA8 T P range Input AGA 8 Additional alarm message letters L Line B Base Comparison limit Either the A or B user alarms are out of limits Chromat error The Chromatograph has indicated that it has an error of some kind Chromat slv fail Limit MODBUS communications with a Chromatograph acting as a slave have failed Compress fail Limit Compressibility calculation has not been fully configured Database corrupt System Notification that the 795x database has been automatically fixed after corruption was detected Check the configuration in case data has been changed DBM bad chksum The memory checksum has failed The 795x needs to be re configured Additional character that may be seen V Volatile memory N Non volat
49. to the alarm log Page 8 2 8 1 5 8 1 6 Chapter 8 Alarms What the Alarm Status Display tells you A typical Alarm Status Display is shown in Figure 8 2 The display lists for each type of alarm System Input or Limit the number of alarms that are live and new e New alarms are alarms that have been received but not accepted e Live alarms are alarms that refer to conditions still active An example of a live alarm is when there is a fault in the system This produces two alarms one when the fault first occurs ON and the second when it is put right Off If only the first alarm of the pair has been received the alarm is said to be live because the condition still exists The number of live alarms tells you how many faults are still active If you look at the Historical Alarm Log this tells you more about these faults What the entries in the Historical Alarm Log tell you Figure 8 3 shows a typical display and the function of the relevant buttons Key to figure 1 Indicates if there are entries BEFORE this one Alarm is either ON fault occurrence or OFF fault cured Type of alarm Indicates alarm not accepted K OFF INPUT Accept this alarm Tur L Alarm description and extra identifier to qualify the alarm v 28 06 05 15 03 01 4 Clear e e 1 Clear this alarm entry Date and time that this alarm message was raised Identifies a metering run stream not applicable to single meter
50. version 511020 issue 2 10 Static precautions Some parts of the instrument such as circuit boards may be damaged by static electricity Therefore when carrying out any work which involves the risk of static damage to the instrument the instructions show the following notice CAUTION While carrying out this procedure you must wear an earthed wrist strap at all times to protect the instrument against static shock At such times you must wear an earthed wrist strap to protect the instrument Safety information NOTE This information applies only to those instruments which are mains powered Electricity is dangerous and you risk injury or death if you do not disconnect the power supplies before carrying out some of the procedures given in this manual Whenever there is such a hazard the instructions show a notice similar to the following WARNING Electricity is dangerous and can kill Disconnect all power supplies before proceeding You must heed any such warnings and make sure that before you go any further e All power leads are un powered e All power leads are disconnected from the equipment which you are working on unless the instructions tell you otherwise e You obey any other common sense precautions which may apply to your situation If you obey these sensible precautions you can work on the equipment in complete safety Battery backed Memory notice e ltis essential that the Lithium Cell used for the ba
51. 1 An example of a Calibration Certificate for a 7812 gas density transducer Chapter 11 Configuring by using the menus 11 5 Configuring analogue inputs From Configure option on Main Menu A Wizards S L N Analogue input 1 r J Analogue inputs b Analogue input 2 7 b Flowmeter details m Analogue input 3 c v Transducer details d iv 1 Analogue input 4 d om 4 L N B Analogue input 5 la we L N J Value a Analogue input 6 b Input type b Analogue input7 6 Average a Vv Analogue input 8 N d v v al AM J J J 4 EAS Analogue input 9 i 2 Analogue input 10 b c v Lo O N a Figure 11 2 Menu structure for configuring analogue inputs From Configure option on Main Menu LA Wizards 5 A Gas densitometer 1 a N Density Ko F a Analog inputs b Gas densitometer 2 b Density K1 4b Flowmeter details a Spec grav meter 1 G Density K2 6 vV Transducer details a V Spec grav meter 2 d j B Temperature K18 L d A A Temperature K19 gt a VOS optional 1 b Density offset c B i Corrections I RES d AT Noise filter l c vj LLL M d K2 coefficient P ee gt KO coefficient b Noise filter v d L N SG calibration aj Calibrate 7 b Gas X timeperiod b Gas Y timeperiod amp V B ui wg 5 Figure 11 3 Menu structure for configuring transducer details Page 11 5
52. 2 Rx Com 3 Rx 4 Supply 5 Com 0V Com 0V Com 0V 6 7 Com 2 CTS Com 3 CTS 8 Com 2 RTS Com 3 RTS 9 Com 2 Rx Tx Com 3 Rx Tx Pin PL2 PL3 PL4 PL5 PL6 PL7 PL8 PL9 1 Stat op2 Pulse op ve Turb A ip Den 1 ip Ana op 1 PRT 1 pwr PRT 3 pwr 24V pwr 2 Stat op 3 Pulse op 1 Turb A ip Den 1 ip Ana op 2 PRT 1 sig PRT 3 sig Ana ip 5 3 Stat op 4 Pulse op 2 Turb B ip Den 2 ip Ana op 3 PRT 1 sig PRT 3 sig Ana ip 5 4 Stat op 5 Pulse op 3 Turb B ip Den 2 ip Ana op 4 PRT 1 pwr PRT 3 pwr 24V pwr 5 Stat op 6 Pulse op com Turb pwr Den 3 ip Ana op 5 PRT 2 pwr PRT 4 pwr 24V pwr 6 Stat op 7 Stat ip 1 Turb pwr Den 3 ip Ana op 6 PRT 2 sig PRT 4 sig Ana ip 6 F Stat op com Stat ip 2 Stat ip 5 Den 4 ip Ana op 7 PRT 2 sig PRT 4 sig Ana ip 6 8 NO alarm Stat ip 3 Stat ip 6 Den 4 ip Ana op 8 PRT 2 pwr PRT 4 pwr 24V pwr 9 Com alarm Stat ip 4 Stat ip 7 24V pwr Ana op com Ana ip 7 Ana ip 8 24 V pwr 10 NC alarm Stat ip com Stat ip 8 24V pwr Ana op com Ana ip 7 Ana ip 8 24V pwr Page C 11 Appendix C Technical data for the 7951 C 6 Earthing In addition to earthing the chassis described in chapter 4 you may have to make extra earth connections in some cases depending on the installation requirements The types of connection can be split into three groups each of which has different earthing requirements The groups are Group 1 non isolated power supply Serial communications po
53. 24V DC Power Figure C 1 Earthing arrangements for the 7951 Klippon connectors Page C 13 Appendix C Technical data for the 7951 Protect Ground Analogue Power Group 3 Connect external earths as required Analogue o p Common Group 2 Protect Ground Pin 25 No earthing is STATUS required for Status INPUTS Inputs Opto isolator common only Protect Ground Pulse Output common A Pin 25 PULSE and STATUS OUTPUTS Status Output common Protect Ground 1 Pin 9 Group 1 s SERIAL Chassis and instrumentation PORT are earthed together unless Pin 1 Common J yo cut the link Protect Ground 1 Pin 9 PORT Pin 1 Common J Protect Ground 1 Pin 9 a PORT Pin 1 Common Link Gr RD Chassis Earth Earth PL1 16666 stud E E Ov 24V DC Power Figure C 2 Earthing arrangements for the 7951 D type connectors Page C 14 Appendix C Technical data for the 7951 Earthing requirements for group 1 connections only In general the earthing arrangements are different for large and small installations A small installation may possibly consist of just one instrument e If the 7951 is part of a large installation with separate earths for chassis and instrumentation In this case you may depending on the overall system requirements earth the 7951 chassis and instrumentation separately by cutting the link on the connector board
54. 79 69 983 09 986 48 989 87 993 26 996 63 999 63 1000 00 1003 36 1006 72 1010 07 946 46 949 63 952 82 956 00 959 18 962 36 965 53 968 89 971 85 974 65 975 00 978 15 981 29 984 42 1019 87 1023 24 1026 60 1029 96 1033 32 1038 67 1040 01 1043 35 1046 68 1049 63 1050 00 1053 32 1056 63 1059 93 The two tables above are derived from equations in the Revised Petroleum Measurement Tables IP 200 ASTM D1250 API 2540 and ISO R91 Addendum 1 Page E 1 Appendix E Data tables Platinum resistance law To DIN 43 760 220 10 41 20 92 13 180 168 47 210 14 36 10 96 07 190 172 16 200 18 53 0 100 00 200 175 8 190 22 78 10 103 90 220 183 17 180 27 05 20 107 79 240 190 46 170 31 28 30 111 67 260 197 70 160 35 48 40 115 54 280 204 88 150 39 65 50 119 40 140 43 80 60 123 24 130 47 93 70 127 07 Air Air Temperature C Pressure mb 6 10 14 18 22 26 30 900 1 122 1 105 1 089 1 073 1 057 1 041 1 025 930 1 159 1 142 1 125 1 109 1 092 1 076 1 060 960 1 197 1 179 1 162 1 145 1 128 1 111 1 094 990 1 234 1 216 1 198 1 180 1 163 1 146 1 129 1020 1 271 1 253 1 234 1 216 1 199 1 181 1 163 Temp C 0 2 4 6 8 10 12 14 16 18 0 999 840 999 940 999 972 999 940 999 848 999 699 999 497 999 244 998 943 998 595 20 998 203 997 769 997 295 996 782 996 231 995 645 995 024 994 369 993 681 992 962 40 992 212 991 432 990 623 989 786 988 922 988 030 987 113 986 169 985 201 984 208 60 983 191 982 150 981 086 980 000 97
55. 8 890 977 759 976 607 975 432 974 237 973 021 80 971 785 970 528 969 252 967 955 966 640 965 305 963 950 962 577 961 185 959 774 100 958 345 Page E 2 Appendix E Data tables Velocity of Sound in Liquids The values for a selection of fluids are given below You can obtain further details from reference books such as Tables of Physical and Chemical Constants and some Mathematical Functions by G W C Kaye and T H Laby Liquid Temperature Velocity of Sound Rate of Change t C c ms dc dt ms K Acetic acid 20 1173 Acetone 20 1190 4 5 Amyl acetate 29 1173 Aniline 20 1656 4 0 Benzine 20 1320 5 0 Blood horse 37 1571 Butyl acetate 30 1172 3 2 Carbon disulphide 25 1142 Carbon tetrachloride 20 940 3 0 Chlorine 20 850 3 8 Chlorobenzene 20 1290 4 3 Chloroform 20 990 3 3 Ethanol amide 25 1724 3 4 Ethyl acetate 30 1133 3 9 Ethyl alcohol 20 1162 3 6 Formic acid 20 1360 3 5 Heptane 20 1160 4 5 n Hexane 30 1060 Kerosene 25 1315 3 6 Menthol 50 1271 Methyl acetate 30 1131 3 7 Methyl alcohol 20 1121 3 5 Methylene Chloride 25 1070 Nitrogen 189 745 10 6 Nonane 20 1248 Oil castor 19 1500 4 1 Oil olive 22 1440 2 8 Octane 20 1197 Oxygen 186 950 6 9 n Pentane 20 1044 4 2 n Propyl acetate 26 1182 Toluene 20 1044 4 2 Turpentine 25 1225 Water distilled 10 1447 2 20 1482 3 30 1509 1 50 1542 5 Page E 3 Appendix E Data t
56. Analogue input 1 Analogue input 10 LIVE Input data 4 20 mA Analogue input 1 Analogue input 10 LIVE Input data 4 20 mA Analogue input 1 Analogue input 10 Page 11 8 FIXED Input data ALARM Values Limits Fallbacks if limits are 0 100 High Low value mode exceeded p RESULTS Select value __ CALCULATE LIMITS FALLBACK Active CO CO status FIXED Input data ALARM Values Limits Fallbacks if limits are 0 100 High Low value mode exceeded d RESULTS Select ke grins LIMITS FALLBACK ANON status 2 FIXED Input data ALARM Values Limits Fallbacks if limits are 0 100 High Low value mode exceeded b RESULTS a CALCULATE ae EM LIMITS FALLBACK Active Cv m status eym U Figure 11 7 Calculating live CO2 N2 and Cv m From Configure option on Main Menu T A Wizards 7 l Analog inputs Flowmeter details Transducer details 4 Transmitter detail P Flow rate Totalisers WH Line density wy t Temperature Pressure Live CO2 Live N2 Live Cv m Line density B Base density B Specific gravity B Chapter 11 Configuring by using the menus Figure 11 8 Menu structure for configuring transmitter detail o ed J Line temperature la Dens A temperature gt Dens B temperature m V x A Line pressure r Atmos pressure gt P E v m l A J Value I Source Range v Limits M F J Value
57. DC for less than 15 seconds C 4 Maximum number of external connections The table below lists the maximum number of external connections which you can make to a single 7951 Type of connection Maximum number Standard Option 1 Extra I O Klippon D type Klippon D type Inputs Analogue Non SMART Pulse Time period Status Outputs Analogue Pulse Status Serial Communications RS232 RS232 485 1 Use ordering code 7951MAA 38N for Klippon option 1 only or 7951MAA 38H for both Klippon options 1 and 2 2 Use ordering code 7951MAB 38N for D type option 1 only or 7951MAB 38H for both D type options 1 and 2 Page C 3 Appendix C Technical data for the 7951 C 5 Specification General Environmental Working temperature Storage temperature Relative humidity 0 to 50 C 4 to 158 F 20 to 70 C 32 to 122 F Up to 90 non condensing Bump BS 2011 test Eb Vibration Tested to IEC publication 68 2 6 Part Il frequency 10 to 150Hz maximum acceleration 20m s EMC Emissions and Immunity EN 61326 1998 industrial locations Safety To BS EN 61010 standards Enclosure IP50 from the front panel only when mounted Dimensions Height 101mm 3 98 Width 197mm 7 76 Depth 257mm 10 1 Weight 2 5kg 5 5Ib External connections Type 7951MAA Klippon Klippon multi way connector system for all signals except communications Separate 9 way D type connectors for communications Options 7951MAB
58. FERRAL density Downstream density value Figure 11 23 Calculating density referral Page 11 21 Chapter 11 Configuring by using the menus From Configure option on Main Menu N Wizards 2 Analogue inputs b Flowmeter details V Transducer details TA 4 Transmitter detail 2j Flow rate b Totalisers a V Line density m Prime value Prime selection Line density A Line density B Fallback Limits Den referral KDe OJA 2o L L N J Value P Density B source el v PTZ2 LA Compressibility 7 q N Density referral KDe mi m AB x Value Live or set M Line dens prime sel r Selection Value Offset PTZ1 Offset A High 73 Low m Step ml BUM Comparison IE Value Figure 11 24 Menu structure for configuring line density Page 11 22 Prime density value ra Units imm EE Position 3 b Chapter 11 Configuring by using the menus 11 12 Configuring base density LIVE Input data Prime SG LIVE Input data LPress LTemp Z LDensity LIVE Input data Zbase LIVE Input data Analogue input 1 Analogue input 4 FIXED Input data RESULTS BDensityAir CALCULATE Base BASE DENSITY 4 density FIXED Input data RESULTS ZBase BTemp BPress CALCULATE Base BASE DENSITY PTZ1 rT density FIXED Input data RESULTS BPress BTemp R CALCULATE Bas
59. Ib barrel tons ft tons gallon US g m hour pulse u s pulse m Pulse vol P Ibf s ftz Page 9 3 Chapter 9 Additional facilities Page 9 4 Chapter 10 Configuring your instrument by using wizards 10 Configuring your instrument by using wizards 10 1 What this chapter tells you This chapter features complete maps of all the configuration wizards Each map shows all the possible routes through a wizard 10 2 Wizards Configuring the easy way Wizards are configuration tools which are written into the instrument s software To configure your instrument just select the wizard which fits your requirements most closely follow the prompts to supply the information it asks for and then if necessary edit the resulting configuration to match your exact needs Wizards are easy to use We recommend that you use them to configure your installation From Configure option on Main Menu N J Wizards 3j Setup wizard S j Setup wizard lan 9 Analoge inputs b Units wizard B Choose option m b Transducer details a c EM c va Line densit Lv J Yi d Y E o D J A Units wizard Choose option m b ption mtg as N d Figure 10 1 How to get to the wizards menu 10 3 Wizard Maps Conventions used Maps are represented in a form that closely resembles a flow chart The basic conventions for a wizard map are shown in Figure 10 2 on the page 10 2 Page 10 1
60. Operating Manual HB511020 Rev A November 2007 Micro Motion 7951 Signal Converter 7951 Signal Converter With gas software 1020 Micro Motion 7951 IST lt TTT U H E a amp B BG BB 20 08 Klippon Connector Model PLS PL6 PL7 PL8 PLO PL2 PL3 PL4 D Type Connector Model Be TT TET 9s SK4 SKS SK7 SKS Introduction The Micro Motion 7951 Signal Converter can be used for dual channel stream gas applications Software Version 1020 Gas Applications Models Covered 7951MAAO Models Covered 7951MABO S Micro Motion EMERSON Process Management Copyright 1997 2007 Micro Motion Inc pursues a policy of continuous development and product improvement The information contained in this document is therefore subject to change without notice To the best of our knowledge the information contained in this document is accurate However Micro Motion cannot be held responsible for any errors omissions or inaccuracies or any losses incurred as result of them IMPORTANT NOTICE Because we are continuously improving our products some of the menus which appear on your instrument s display may not be exactly as illustrated and described in this manual However because the menus are simple and intuitive this should not cause any major problems This manual is concurrent with embedded software
61. R X CORRECTIONS Chapter 11 Configuring by using the menus RESULTS Qg FACTOR Factor FIXED Input data FIXED Input data LIVE High Input data limit Y Prime density MASS FLOW RATE Vol flow rate RESULTS x 3600 Qv Low limit RESULTS Qg Figure 11 10 Calculating turbine mass and volume flow rate Page 11 11 Chapter 11 Configuring by using the menus LIVE Input data SG3096 Time period A3 _ CALCULATION SG3096 Time penod Ag CALCULATION Prime base SG density 7 CALCULATION SELECT B Analogue input 1 Select i value L SG and Analogue input 10 _ status RESULTS Specific gravity A FIXED input data ALARM If limits are Limits Fallback od Comp High Low Step Mode Value Pi PRIME SG DENSITY SELECTION Prime specific gravity Specific gravity B Figure 11 11 Calculating prime specific gravity Page 11 12 From Configure option on Main Menu Wizards Analog inputs Flowmeter details Transducer details Turbine Orifice Chapter 11 Configuring by using the menus ajo S m 4 f U Error alarm limit 7 Turbine type V Po A Diff pressure gt Pipe diameter Orifice diameter iva Dynamic viscosity M Turbine frequency i Turb meter factor Turbine K factor LA Turbine K curve 7 Corrections Turb freq hi limit L Tv 1 Turb gross vo
62. ROW bution to scroll through the option list until nitialise is shown 9 Press the b button to select Initialise 10 Press the d button to confirm that you want to lose the current configuration 11 Wait a few seconds until initialise on line 2 of the display changes back to Choose option 12 Press the b button then the UP ARROW or DOWN ARROW button to scroll through the option list until Density 1 is shown 13 Press the b button to select Density 1 14 Press the d button to answer YES to Edit Gas density A 15 Press the b button and then input the factor KO from the Calibration Certificate that was shipped with the meter 16 Press the b button then ENTER to confirm the KO value 17 Enter values for factors K1 and K2 in the same way as for KO Note Figure 2 4 on page 2 4 shows where to find the KO K1 and K2 factors on a calibration certificate Always use values from the calibration certificate that was shipped with the connected meter 18 Press b button to start the correction selection process 19 Use the UP ARROW button to scroll through the options until Temp appears on line 2 20 Press the b button and then the ENTER button to confirm that temperature correction is to be applied 21 Enter factors K18 and K19 in the same way as for KO K1 and K2 22 Press the ENTER button to skip past the Density offset prompt 23 Keep pressing the c button to answer NO to all questions until the wizard is
63. Route detours to the Analogue output wizard sequence before continuing 3 Route detours to the User Alarm wizard sequence before continuing 4 Route detours to the Multiview wizard sequence before continuing SG1 amp 2 Application Wizard Map Page 10 12 Chapter 10 Configuring your instrument by using wizards 10 12 Line density wizard This wizard configures the 795x for getting line density A and or line density B data Edit Density Limits amp Setup wizard Line dens A VOS type Fallback No Line Density K Selection No gt gt P method Yes r Line density B Yes prime selection SG method Line density hi Imt A gt Y B gt Auto Ae K Line density lo Imt Automatic gt TOS T Density Transducer A K Line density comp Imt Edit b Selection T Line density A calc No gt 7812 N2 high Prime dens FB type No Y K Selection 7812 N21 Yes N Fallback value m 7811 AR high L T l K Transducer A KO Y Last Good Value T 7811 N2 high Transducer A K1 Y E T 7811 N21 Prime density FB val K Transducer A K2 gt ow kerime density Ee vas J 7810 CH4 medium C Exit Density A correction 7810 N2 low wiz
64. The display looks similar to that shown in Figure 2 11 although values shown may vary Chapter 2 Getting started Line temperature 15 000 Deg C Live Figure 2 11 Line temperature data display End of Worked Example 3 Page 2 11 Chapter 2 Getting started 2 7 Example 4 7951 with a mA type pressure transmitter About this example This example shows you how to connect a mA type pressure transmitter to the 7951 and then use the Pressure wizard to configure the system In this example the Pressure wizard is used to configure a connection as follows e Asingle pressure transmitter is connected to Analogue Input 3 Work through the example by following the instructions below If you are not sure where the buttons are refer to Chapter 6 Connect the 1 Wire the transmitter to the 7951 as in Figure 2 12 meter 2 Earth the 7951 to a suitable earth point EMC Notes To meet the EC Directive for EMC Electromagnetic Compatibility it is recommended that the Flow Computer be connected to transducers using a suitable instrumentation cable containing individually shielded twisted pairs and an overall screen to cover all cores The instrumentation cables should have individual screen s foil or braid over each twisted pair and an overall screen to cover all cores Where permissible and depending on the earthing scheme employed at the installation the overall screen should be connected to the earthed metal wo
65. WN ARROW button to scroll through the option list until nitialise is shown 10 Press the b button to select Initialise 11 Press the d button to confirm that you want to lose the current configuration 12 Wait a few seconds until initialise on line 2 of the display changes back to Choose option 13 Press the b button then the UP ARROW or DOWN ARROW button to scroll through the option list until Temperature is shown 14 Press the b button to select Temperature 15 Press the d button to answer YES to the question Edit Line Temperature 16 Press the b button 17 Press the UP ARROW button until Analogue input 3 appears 18 Press the b button and then the ENTER button to confirm selection of Analogue input 3 19 Press the ENTER button to keep the default selection of a 4 20mA type input 20 Press the b button 21 Type in a suitable maximum temperature value and then press the ENTER button 22 Press the ENTER button to move on to the next prompt 23 Press the b button 24 Type in a suitable minimum temperature value and then press the ENTER button 25 Press the ENTER button to move on to the next prompt 26 Press the d button 27 Press the UP ARROW button so that Set changed Live 28 Press the ENTER button once 29 Press the c button several times to answer NO to all questions until the wizard is exited 30 Press the MENU button 31 Press the d button and then press the a button
66. Yes gt Edit Base density Yes No gt C Yes gt Edit Specific gravity Yes No Yes Edit Temperature Route detours to the Line density wizard sequence before continuing from here Route detours to the Base density wizard sequence before continuing from here Route detours to the Specific gravity wizard sequence before continuing from here Chapter 10 Configuring your instrument by using wizards Edit Analog outputs No Edit Y User Alarms Edit Multi view No es gt No gt Y es gt No Yes gt Route detours to the Analog outputs wizard sequence before continuing from here Route detours to the Alarms wizard sequence before continuing from here Route detours to the Multi view wizard sequence before continuing from here Route detours to the Temperature wizard sequence before continuing from here Route detours to the Pressure wizard sequence before continuing from here Exit wizard mA input Energy FSER Energy type selector hak M K Selection mA inpu AGAS r Mass y K Live CO2 value Volume Y K Live N2 value Md L SG Imm value Live energy input K Selection mA input 1 y etc mA input 10 Special equations No gt Yes gt Route detours to the T
67. Zener barrier ground Use suitable cables that meet BS5308 multi pair Instrumentation Types 1 or 2 Set DIP switch 3 Ensure that the DIP switch inside the 7951 is set as shown below Loop powered 4 20mA 7951 temperature transmitter Klippon D type Power PL9 5 SK8 24 PL8 2 SK8 2 PL8 3 SK8 3 PL9 8 SK8 25 PRT Notes 1 Specified 7951 pins are for Analogue Input 3 2 DIP switch position 3 must be set to 4 20mA Figure 2 10 DIP switch and safe area wiring for a mA type temperature transmitter Page 2 9 Chapter 2 Getting started Turn on the power Go to the wizards menu Clear existing configuration This is optional Select the wizard Start of wizard Choose the Analogue Input Select the type of Analogue Input Set Analogue 0 and 100 range Make the Analogue Input live Skip over the next few questions View how you have configured Line temperature Page 2 10 Turn on the power to the system The system goes through a Power On Self Test POST routine which takes less than 30 seconds When it is finished ignore any flashing alarm lights which may appear Press the MENU button to go to Page 1 of the Main Menu if you aren t there already Press the DOWN ARROW button twice to go to Page 3 of the menu Press the b button to select Configure Press the a button twice to go to the wizards menu Press the b button then the UP ARROW or DO
68. ables Water sea o Xylene Page E 4 1430 2 1449 5 1471 1 1507 1 1534 7 1352 Appendix E Data tables E 2 Equations used to derive data tables Density temperature relationship The density temperature relationship is Pt P15 exp 04541 1 0 804541 where pt density at line temperature t C kg m P15 density at base temperature 15 C kg m At tC 15 C i e t base temperature 045 tangent thermal expansion coefficient per C at base temperature 15 C Tangent thermal expansion coefficient The tangent thermal expansion coefficient differs for each of the major groups of hydrocarbons It is obtained from the equation Ko K p s Wie aeo P45 Where Ko and K4 are API factors which are obtained from the table Product Density Range Ko K4 kg m Crude Oil 771 981 613 97226 0 00000 Gasolines 654 779 346 42278 0 43884 Kerosines 779 839 594 54180 0 00000 Fuel Oils 839 1075 186 96960 0 48618 Product compressibility The definition of compressibility used to develop the table in Section 1 of the P Petroleum measurement Manual is the isothermal secant compressibility defined by the equation z Vo P4 P2 Where B isothermal secant compressibility at temperature T Vo volume of liquid at atmospheric pressure BUL change in volume from Vo to V4 Va change in volume from Vo to Vo V1 amp V2 volumes at pressures P4 and P respectively Py amp P2 gauge press
69. age unless VOS correction has also been selected y 7811 N2 high y 7811 N2 low Y 7810 CH4 medium Y 7810 N2 low y 7812 AR high Line density A gamma PEONERESERURE NL no Iranducer A K3 Appears for Y SG method K Transducer A K4 only le DENNIS NV Tt een EE ii Tranducer A KS Appears for Y P method K Transducer A K6 only Density A offset Route returns to Edit Density Limits amp Fallback prompt on previous page unless temperature correction has also been selected Density 1 Wizard Map Part 2 of 2 Page 10 7 Chapter 10 Configuring your instrument by using wizards 10 8 Density 2 application wizard Setup wizard H 2 Y U E Pa Nes gt Transducer B KO Y Yes K Transducer B K1 Y No Transducer B K2 Edit o Dens Temp B ws at No Yes gt Edit Special equations See note 2 No Yes gt Edit Density T Limits amp Fallback No No Yes gt Exit Wizard No Edit Analog outputs K Line density hi Imt Y No Seenote3 Line density lo Imt Yes Yes gt No Prime dens FB type m Alarms K rad No See note 4 gt Fallback value Yes C Last Good Value No Edit UN GAN oe N U K e e i m K Prime density FB val Multi v
70. ard Chapter 10 Configuring your instrument by using wizards 10 20 Alarms wizard Setup wizard Alarms b key Edit User Alarm User alarm X ptr User alarm Y ptr K Comp alarm A ptr1 K Comp alarm B ptr1 v v v Y K User alarm X low Imt User an Y low Imt K Comp alarm A ptr2 K Comp alarm B ptr2 Y y y K User alarm X hi Imt K User E Y hi Imt K Comp alarm A limit K Comp alarm B limit Exit wizard Alarms Wizard Map Page 10 29 Chapter 10 Configuring your instrument by using wizards 10 21 Multi view wizard Setup wizard 1 Multi view b key K Multiview text width Default value is 10 K Mv page line1 text Default value is Density Y K Mv page line1 ptr Default data is Prime Base Density Mv page line2 text Default value is Temp Y K Mv page line2 ptr Default data is Line temperature K Mv page1 line3 text Default value is Pressure Y K Mv page line3 ptr Default data is Line pressure K Mv page lined text Default value is Mass rate Y K Mv page lined ptr Default data is Mass rate Exit Wizard Multi view Wizard Map Page 10 30 10 22 Full Setup This wizard consists of multiple wizards Setup wizard Full Setup Edit Line density Yes No gt
71. ard K Selection v Vos 7812 AR high Appears for None Y Fallback value T VOS i Line density A gamma only emp an SS Temp Y and Appears for Temp VOS NW ee AK5 P method l Temp Follow Temp K Transducer A K6 Transducer AK18 routeandthen ver Y follow VOS In _ Appears for Transducer AK19 Transducer A K3 SG method Y T a only None FK Density A offset i h Transducer A K4 Laa EEE yo at Density A offset Line density Wizard Map Part 1 of 3 Page 10 13 Chapter 10 Configuring your instrument by using wizards Sequence Line density B measurement See PTZ1 Line density B Part 1 selection Edit page PTZ1 Time Period Line density B calc TIONS a m Time Period gt No gt K Analogue input gt Yes gt gt P method Analogue input gt SG zum d metno Edit Line density B Transducer B KO analogue input y Hn No gt Transducer B K1 Y Part 1 Transducer B K2 Density Transducer B page i K Selection Line den B input chl Density B correction s 7312
72. ards so that it disengages from the connector at the back of the case Withdraw the board from the case 3 Replace all items by reversing this procedure Take great care to ensure that the cables are not pinched on re assembly 14 6 Connector Board 1 Remove the Rear Panel Assembly as described in Section 14 9 2 Remove the Mother Board as explained in Section 14 10 3 Unscrew the threaded hexagonal spacers on top of the Connector Board then lift the Connector Board off the studs 4 Replace all items by reversing this procedure Take great care to ensure that the cables are not pinched on re assembly 14 7 Fuse 1 Undo and remove the four screws which secure the Bezel to the case Withdraw the Front Panel Assembly to the limits of the connecting wiring then lay it on top of the case 2 Slide the Power Supply Board out of the case 3 Referring to the diagram find the fuse and gently prise it out of the fuse holder 4 Press the replacement fuse into the fuse holder Make sure that the fuse is of the correct type and rating as specified in Chapter 15 5 Replace all items in the reverse order of removal Take great care to ensure that the cables are not pinched on re assembly Top of instrument case Power Socket Rear Supply Mother Fuse SK1 Panel Board Board Figure 14 4 Where to find the fuse on the Power Supply Board Page 14 3 Chapter 14 Removal
73. arth to which the instrumentation is connected To ask another part of a system to supply information J See Joule The unit of work 1J 1N m A metal bridge that closes an electrical circuit Typically a jumper consists of a plastic plug that fits over a pair of protruding pins Jumpers are sometimes used to configure add on option boards By placing a jumper plug over a different set of pins you can change a board s parameters K The K factor relates the output from a flow meter to a specific set of units For volume output meters such as turbines it is often quoted as pulses per meter cubed The ratio of the dynamic viscosity of a fluid to its density LED Light emitting diode Limit Live Location Location ID Mass flow rate MAU MODBUS TCP Mode Monitor Multiples of numbers Multiview Appendix A Glossary L See Light emitting diode A diode which light up when current flows through it LED s are usually used as indicator lights on instruments Limits are upper and lower values between which a measured parameter is expected to be Ifthe parameter is outside these limits it can trigger an alarm if you have set the system to do so A value is live ifit can be altered automatically as a result of some internal calculation or transducer input See also Set An area of computer memory where data is stored Information can be written to it from the keyboard a remote computer or
74. as shown in the diagram on Page 11 37 Entering the text and location ID for each line 1 Select whichever line 1 4 you want to configure 2 Enter the text you require 3 Enter the parameter location ID you require Note that after the location ID is entered the display changes to show the name of the parameter Set the text width The text width is the number of characters you want the text to occupy If you want to set the text width 1 Goto the Text width menu 2 Edit the value Dual Channel Gas Signal Converter Operating Manual Molecular Weight of Gas Calculation The molecular weight of gas in the stream can be calculated independently of the compressibility calculations Mass of Air 2 Specific Wie Molecular Gravity a 1 Weight l x Calculation Weight Mass of Air MolecularWeight SG M jj 2 Specific Molecular Molecular xx Index for use with vm 4 FM Weight Gravity B EUER Weight list of associated data Data shown in the diagram and listed below can be found by looking within these menus A lt Configure gt lt Specific gravity and B Specific gravity Data associated with the block drawing shows data that can be Live or Set Parameters as displayed Notes Index Parameters as displayed Notes SG A SG B Mass of Air Molecular Weight B Molecular Weight A Page i Dual Channel Gas Signal Converter Operating Manual Page
75. automatically by the sensors A number which uniquely identifies a location The rate at which a given mass of fluid flows through a transducer Short for Media Access Unit an Ethernet transceiver MODBUS TCP is a variant of the MODBUS family of simple vendor neutral communication protocols intended for supervision and control of automation equipment Specifically it covers the use of MODBUS messaging in an Intranet or Internet environment using the TCP IP protocols The most common use of the protocols at this time are for Ethernet attachment of PLC s I O modules and gateways to other simple field buses or I O networks The operational state of the instrument To keep a constant check on the status of a system or process T tera 101 G giga 10 M mega 10 k kilo 10 m milli 10 u micro 10 A user defined display which can show up to four lines of information of your choice Typically each line comprises text such as a parameter name and a value for the parameter Page A 5 Appendix A Glossary Pa Pascal Percent mass Periodic time Platinum resistance thermometer POST Power on self test Protect ground PRT Pressure Primary variable psi Pulse output PV Radio frequency interference Reynolds number RFI RS 232 Page A 6 P See Pascal The unit of force 1 Pa 1N m The percentage that the mass of a substance has compared to the total mass for a mixture
76. by the side of it 3 look up the Item Number on the parts list The parts list tells you e The Part Number for the item e Adescription of the item e The quantity of the item that appears on the drawing 15 2 How to obtain spare parts You can obtain spare parts from the supplier from whom you bought the instrument or from the factory In either case you must state on your order e Your name address and telephone or fax number e Adescription of the parts you want e The part numbers of the items you are ordering e The quantity of each item Page 15 1 Chapter 15 Assembly drawing and parts list 60 js 6 off 8 off Ve Se L O OO 4 of ISN cag eaten E 9o 0060 Figure 15 1 Diagram for identifying and ordering spares Page 15 2 Chapter 15 Assembly drawing and parts list Item no 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Part number 79513701 79513703 79511206 79510503 79510505 79510504 79513702 79513702 79513705 376100160 79510502 79510501 411129010 79513710 410031010 400001930 410031020 411029020 412011420 41530070 406803060 411129020 406902460 360106230 800400380 Description Instrument case Bezel Display assembly Motherboard assembly Connector board assembly Klippon connector
77. ce is associated with a lettered button on the front panel a b C or d For example a menu choice on Display Line 1 is associated with the a button Similarly a menu choice on Display Line 2 is associated with the b button and so on Ifthere is no menu choice on a display line the associated letter button will not do anything When you do make a menu choice from a menu using the lettered buttons the display changes to show the selected lower level menu or a parameter screen Figure 7 2 shows an example where pressing the a button will lead to a lower level menu for Flow rates Similarly the b button leads to a lower level menu for Flow totals Using the BACK button will return you to the previous menu level MeterRun flowratesb Station flowratesb MeterRun flow ImtsbD Meter run totalsb Station totalsb Product totalsb 2 gt TIT g Flow ratesb Flow totalsp Densityb Viscosity I 1x4x1 densityD m xD 4x4x4 densityb Meter run densityb Y Base density t d 7 1x4x1 viscosityD 4x4x4 viscosityb Meter run dyn visc Meter run kin visc L Note The menus may be different in your software Figure 7 2 Menu Choice Selection Where a menu has more choices than can fit on to the 4 line display the menu comprises of two or more pages Vertical arrow icons appear on the left hand side of display to indicate there are further pages on the same menu level Figure 7 3 sho
78. configuration involve Before you start Recommended sequence for configuration What Sections 11 5 11 18 tell you Configuring analogue inputs Configuring transducer details Configuring transmitter detail Configuring flowmeter detail Configuring flow rate Configuring totalisers Configuring line density Configuring base density Configuring specific gravity Configuring energy Configuring custom applications Configuring mA outputs Configuring other parameters Configuring Multiview 9 2 9 2 9 3 10 1 10 1 10 1 10 1 10 3 10 4 10 5 10 7 10 8 10 9 10 11 10 12 10 13 10 16 10 18 10 20 10 22 10 24 10 27 10 28 10 29 10 30 10 31 11 1 11 1 11 1 11 2 11 3 11 5 11 5 11 6 11 10 11 14 11 16 11 18 11 23 11 26 11 29 11 31 11 32 11 33 11 37 12 Routine operation 12 1 What this chapter tells you 12 2 The menu diagrams 12 3 Security and passwords 12 4 How you can edit displayed information 12 5 Making data values Live or Set 12 6 Changing the units which are displayed 12 7 Changing fallback values 12 8 Changing the time and date 12 9 Checking the performance of the 7951 12 10 Giving your 7951 a unique identifier 12 11 Printed reports 13 Routine maintenance and fault finding 13 1 Cleaning the instrument 13 2 Fault finding 14 Removal and replacement of parts 14 1 Front panel assembly 14 2 Display 14 3 Switch panel 14 4 Processor board 14 5 Power supply board 14 6 Connector Board
79. connected to the Instrumentation or Zener barrier ground Use suitable cables that meet BS5308 multi pair Instrumentation Types 1 or 2 7810 11 7951 Klippon D type PL5 9 SK6 22 PL5 1 SK6 14 PL5 2 SK6 15 PL5 10 SK6 24 Figure 2 1 Safe area wiring for a 7810 11 3 wire arrangement T Hazardous area considerations Refer to meter documentation for details of Intrinsically Safe Barrier Isolator requirements Page 2 2 Turn on the power Go to the wizards menu Clear existing configuration This is optional Select the wizard Start of wizard Enter densitometer calibration factors Enter temperature correction factors Skip over the next few questions View how you have configured Line density Chapter 2 Getting started 7812 7951 Klippon D type 24V Power PL5 9 SK6 22 PL5 1 SK6 14 PL5 10 SK6 24 PL5 2 SK6 15 Figure 2 2 Safe area wiring for a 7812 3 wire arrangement Turn on the power to the system The system goes through a Power On Self Test POST routine which takes less than 30 seconds When it is finished ignore any flashing alarm lights which may appear Press the MENU button to go to Page 1 of the Main Menu if you aren t there already Press the DOWN ARROW button twice to go to page 3 of the menu Press the b button to select Configure Press the a button twice to go to the wizards menu Press the b button then the UP ARROW or DOWN AR
80. d options Press either the b button or the enter button to select the wizard option that presently appears on the 795x display Examine and then follow directions provided alongside the prompt of the selected wizard option Setup wizard Selection Selecting this with the B key starts the wizard selection process Use scroll up down arrow keys to move through the wizard options gt Select option Y We Choosing this causes configured data to Initialise A be restored to default values Y Multi view K Turn to page 10 30 y Alarms gt Turn to page 10 29 y Analogue outputs K Turn to page 10 28 Y Special Calc K Turn to page 10 27 y Transmitters gt Turn to page 10 24 y Pressure Turn to page 10 22 y Temperature K Turn to page 10 20 Y Specific gravity gt Turn to page 10 18 y Base density gt Turn to page 10 16 y Line density K Turn to page 10 13 Y SG1 amp 2 K Turn to page 10 12 y SG 2 K Turn to page 10 11 y SG 1 K Turn to page 10 10 Y Density 1 amp 2 Referto Density 1 and Density 2 wizard maps y Density 2 K Turn to page 10 8 Y Density 1 K Turn to page 10 6 y Full Setup K Turn to page 10 31 Figure 10 3 Set up Wizard Selection Page 10 4 Chapter 10 Configuring your instrument by using wizards 10 6 Units Wizard
81. e 12 bit 20 075926 of full scale 1 part in 3500 1MQ minimum Any measured ot computed value keyboard selectable 0 1 seconds minimum All analog outputs are galvanically isolated from ground lt 20ppm per 1000 hours for first 1000 hours subsequently far less 1 The maximum load impedance that the analog outputs can drive is 1K Ohms This must include any barrier impedance and the load itself 2 Analog outputs are Active Loops Active loops are powered by the device providing the current output Passive loops are powered externally usually by the device receiving the current Pulse Quantity Options Type Output rating Switch voltage Maximum frequency Digital Status Quantity Appendix C Technical data for the 7951 7951MAA Klippon 3 off 7951MAB D type 5 off None Open collector Darlington drivers 200mA 24V with 50 duty cycle 24V maximum 10Hz 7951MAA Klippon 7 off 7951MAB D type 9 off Options Option for extra status outputs 7951MAA 38 Klippon O off 7951MAB 38 D type 8 off Type Output 1 is a relay 0 5 Amp DC all others are FET open drain Rating 250mA 24V Switching voltage 24V Communications Serial Communications Port 1 Physical layer RS232 full duplex Max baud rate Handshake Port 2 Physical layer Max baud rate Handshake Port 3 Physical layer Max baud rate Handshake Software protocols 19K2 XON XOFF RS232 fu
82. e CO2 Edit Live CO2 Line CO2 input chl Limits amp Fallback No K K Selection No wizard gt mA input 1 gt Y MAp i Live SE high limit T K Live CO2 low limit mA input 10 y Live CO2 FB type 0 Live CO2 100 selection v Live CO2 0 gt None Y v Fallback Value Analogue input n type Y K Selection Last Good Value Note n is the gt PT100 input il number of Y s the input 0 20mA input K Live CO2 FB value channel C v selected 4 20mA input Exit Appears for earlier A Fallback value ii wizard only Input channel n Transmitter Wizard Map Part 1 of 3 Page 10 24 Note n is the number of the input channel selected earlier Chapter 10 Configuring your instrument by using wizards Sequence Live N2 from an analogue input From Part 1 page Live N2 input chl K Selection gt mA input 1 Y mA input 2 Y mA input 10 Edit Live N2 Limits amp Fallback Exit wizard Yes Live N2 high limit Live N2 910076 Y C Live N2 Q 096 y Live N2 low limit v s Live N2 FB type Analogue input n type selection K Selection gt None gt PT100 input Y Y Fallback Value 0 20mA input Y Y Last Good Value 4 20mA input m Input channel n h Live N2 Ex
83. e BASE DENSITY PTZ2 7 density FIXED Input data RESULTS 100 0 Select value CALCULATE Bdsg and BASE DENSITY density status Figure 11 25 Base density Page 11 23 Chapter 11 Configuring by using the menus LIVE Input data CALCULATE Prime SG BASE DENSITY Analogue input 1 Select T vdue CALCULATE 1 and BASE DENSITY Analogue input 10 status NX 19 NX 19mod Select PTZ2 SELECT NX 19mod3h Z SGERG Select PTZ1 Z AGA8 Linear interpolation RESULTS Base density A FIXED input data ALARM If limits are Limits Fallback Greaser Comp High Low Step Mode Value Pill li PRIME BASE DENSITY SELECTION Prime base density Base density B Figure 11 26 Calculating base density Page 11 24 Chapter 11 Configuring by using the menus From Configure option on Main Menu N Wizards 7 L 2 A Prime value a A Prime base density 8j Analogue inputs b Prime selection b Value b Flowmeter details Base density A c Units cl f v Aal details N d v Base density B f v Live or set d Transmitter detail 7 Base dens prime sel a a Flow rate b Selection b Totalisers c V Eine density js d d 4 P L J Base density Fr L a N _ Base density A value S Specific gravity b Value ZR Energy Units c f Custom application f s T Li
84. e 11 32 Calculating energy flow rate Page 11 29 Chapter 11 Configuring by using the menus From Configure option on Main Menu AN Wizards P Analogue inputs Flowmeter details E Transducer details 4 f LA Transmitter detail 77 Flow rate Totalisers v Line density v Value Calc source Energy value c TANE em jo els I Energy calc selector Selection L Base density Specific gravity lt Energy B Custom application Md o a 4 Figure 11 33 Menu structure for configuring energy Page 11 30 Chapter 11 Configuring by using the menus 11 15 Configuring custom applications User calculation Type 1 User calculation Type 2 FIXED Input data Constants Pointers FIXED Input data A B X Y a b c d e f User title A B C t User title SPECIAL EQUATION 1 RESULTS SPECIAL EQUATION 2 RESULTS a b Xc User User At BOZON Calculation A Bt Ct Calculation d e Y f Type 1 e Type 2 Figure 11 34 Calculating custom applications From Configure option on Main Menu Wizards 7 Special equation 1 BE Value a Analogue inputs Special equation 2 b7 Constant A b Flowmeter details KW c Constant B c v Transducer details KW d v constant d N J Transmitter details L j Constant Y l 2 Flow rate k Pointer a b Totalisers WY Pointer b B Line density N m Pointer c zz 4 A Base density AJ
85. e Historical Alarm Log 2 an indication of the current status of the system e The Historical Alarm Log This contains an individual entry for every alarm stored in the log The Historical Alarm Log can store up to 30 entries When a new alarm is received one of two things can happen If the Historical Alarm Log is NOT full An entry for the new alarm is simply added to the list If the Historical Alarm Log is full It depends on how the system is set up Either 1 the oldest entry is deleted and the new one is added to the top of the list or 2 the new alarm is discarded In either case the Status Display is updated automatically 8 1 4 Examining the Alarm Status Display and Historical Alarm Log Press the INFORMATION MENU i button if you want to examine the Alarm Status Display or the Historical Alarm Log e To bring up the Alarm Status Display select the Alarm Summary option e To bring up the first entry in the Historical Alarm Log select the Alarm History option e To return to the INFORMATION MENU from the two screens you can use the BACK button i l The Alarm Status Display a Alarm summary gt D Summary Live New Alarm historyb System 001 003 Event summaryb Input 000 000 TL Event historyb Limit 000 000 Typical Display The Historical Alarm Log b Alarm ON SYSTEM Power fail 28 06 05 14 45 01 it Clear Vv L Typical Entry To other entries Figure 8 2 How to get
86. e Pbase v v Zbase er 777 CALCULATE tine S 777 LINE DENSITY PTZ1 densityB BDensiy LIVE FIXED Input data RESULTS Input data R Universal gas constant LPress LTemp CALCULATE T z LINE DENSITY PTZ2 density B M LIVE FIXED Input data RESULTS Input data 0 100 4 20 mA l i v Analogue input 1 Select a value CALCULATE iine and 7 mALINEDENSITY density Analogue input 10 status Figure 11 18 Calculating line density Page 11 18 Chapter 11 Configuring by using the menus ALARM LIVE FIXED Input data s Input data en AGA8 parameters Tbase Pbase Comp range 1 gem Line temperature AGA8 Z COMPRESSIBILITY Zbase Line pressure CALCULATION Molecular mass M Input data normalised Nitrogen Ethane n Hexane Carbon monoxide Carbon dioxide Propane n Decane Hydrogen Hydrogen sulphide n Butane Argon C6 Water i Butane n Heptane n Nonane Helium n Pentane n Octane Methane i Pentane Oxygen Figure 11 19 Calculating AGA8 density compressibility LIVE FIXED Input data ALARM RESULTS Input data Gas components C6 mode ISS component ES NewComp flag Component D Normalised update COMPONENT i components NORMALISATION RAT Gas components Nitrogen Ethane n Hexane Hydrogen Carbon dioxide Propane n Nonane C6 Hydrogen sulphide n Butane n Hepta
87. e input From Part 2 page Edit Atmos Pressure No Exit wizard Yes Atmosp input chl Edit Atmosp Pressure i imi K Selection Limits amp Fallback Exit wizard gt mA input 1 Y w mA input 2 YES s Atmosp high limit s Y MA input 10 L Atmosp low limit Y Atmosp step Imt y K Atmosp 100 value Y Atmosp FB type 4 Atmosp 0 value OPE Y Analogue input n type Ea lbs K Selection Fallback Value Note gt PT100 input Y n is the C Last Good Value number of A the input 0 ss input channel 4 20mA input fo p cNBL 4 selected i i IX Atmosp FB value earlier im Atmosp FB value t Appears for Y Fallback value Input channel n Exit only wizard Pressure Wizard Map Part 2 of 2 Page 10 23 Chapter 10 Configuring your instrument by using wizards 10 17 Transmitter wizard This wizard configures the 795x for getting live CO2 and or live N2 and or live energy data Setup wizard Transmitter Edit Transmitter Cv m CO2 gt 11 Turn to Part 2 page N2 gt N2 Cv m gt 12 Turn to Part 3 pag
88. e operation Page 12 12 Chapter 13 Routine maintenance and fault finding 13 Routine maintenance and fault finding 13 1 Cleaning the instrument You can use a cloth or sponge and water clean the outside of the instrument Do not use caustic cleaning agents or abrasive materials 13 2 Fault finding Although the instrument is designed to be extremely reliable it is possible that faults may arise at some time or another The fault finding charts show the most likely faults and explain how to trace their causes and put them right If you cannot cure a fault yourself contact your supplier or the manufacturers for help Note e e Use the Health Check facility on the 795x to monitor a variety of measurement parameters including time period inputs analogue inputs and status inputs and outputs This can be used as a diagnostic aid if the system seems to be faulty Page 13 1 Chapter 13 Routine maintenance and fault finding PROBLEM A reading from a transmitter is not displayed Is the transmitter s field wiring correct Has it ever been displayed 2 NO Check the field wiring against the wiring schedule Wire the transmitter up according to the wiring schedule YES YES Replace the field wiring to the transmitter The field wiring is faulty Is the transmitter receiving power from the 795x NO 795x s Connector Change the Power Supply Board is p
89. e serial communications ports Code Analog Inputs and Outputs EN analog inputs and 4 analog outputs EN Klippon OR 10 D type analog inputs and 4 analog outputs m Option Boards None Code Connector kits for use with 25 way D type connectors No Commie clot kits required T Code Configuration Tool Not required PC Config Serial Communications Cable Factory configuration 1 7951MA A has 1 dual pulsed flowmeter input For dual stream applications with pulsed flowmeter inputs use option B 2 Software supplied will be latest issue of Signal Converter software unless otherwise specified on order 3 Connector kits are not needed with Klippon connectors option A but they are recommended with D type connectors option B Each kit includes a 1 8m cable and a DIN rail mounted connector block with screw terminals Page C 1 Appendix C Technical data for the 7951 C 3 External connections You can make the following types of external connections to the 7951 e INPUTS Analog Pulse Time period Dens Visc Status e OUTPUTS Analog Pulse Status e SERIAL COMMUNICATIONS Page C 2 Inputs from devices which monitor continuously changing parameters and transmit analog signals These include e PRTs PT100 e temperature transducers 0 4 20mA e pressure transducers 0 4 20mA e differential pressure transducers 0 4 20mA e Viscosity transducers e g Covimat 0 4 20mA e Ca
90. ect the 1 Wire the meter to the 7951 as in meter Figure 2 6 fora NON HAZARDOUS SAFE AREA OR Figure 2 7 fora HAZARDOUS AREA Earth the 7951 to a suitable earth point EMC Notes To meet the EC Directive for EMC Electromagnetic Compatibility it is recommended that the Flow Computer be connected to transducers using a suitable instrumentation cable containing individually shielded twisted pairs and an overall screen to cover all cores The instrumentation cables should have individual screen s foil or braid over each twisted pair and an overall screen to cover all cores Where permissible and depending on the earthing scheme employed at the installation the overall screen should be connected to the earthed metal work at both ends 360 bonding where possible This may have multiple protective earth connections to the pipe work or the building structure and not connected to the individual screen s or Instrumentation or Zener barrier grounds The individual inner screen s should be connected at one end only normally the controller e g Flow Computer end These should be connected to the Instrumentation or Zener barrier ground Use suitable cables that meet BS5308 multi pair Instrumentation Types 1 or 2 3096 3098 7951 Klippon D type ohms 24V Power PL5 9 SK6 22 Signal PL5 6 SK6 19 PL5 10 SK6 24 Bee 0 0V Power Figure 2 6 Non hazardous Safe area wiring for a 3096 3098 Page 2 6 Chapter
91. ected to Density input 1 e Gas density measurements nominated as density A and density B from two transducers that are connected to Density input 1 and Density input 2 e Specific gravity measurement nominated as SG A from a single transducer that is connected to Density Input 3 e Specific gravity measurement nominated as SG B from a single transducer that is connected to Density Input 4 e Specific gravity measurements nominated as SG A and SG B from two transducers that are connected to Density input 3 and Density input 4 Density A Density B Base density A Base density B SG A SG B e Line temperature e Density temperature A e Density temperature B e Live nitrogen measurement from an analogue input e Live carbon dioxide measurement from an analogue input e Live energy measurement from an analogue input e Special equations 1 and 2 e User defined alarms e Multi page multi view s A collection of wizards for configuring a whole system Page 10 3 Chapter 10 Configuring your instrument by using wizards 10 5 Set up Wizard Selection Map After using the menu to arrive at the wizard sub menu as shown earlier in Figure 10 1 a wizard option can be chosen Selection Press the b button to begin the selection process Procedure Use the up down arrow buttons to cycle through all the available wizar
92. ed e Low limit The lowest value which the parameter can have before an alarm is generated e Step limit The greatest allowable step between successive values before an alarm is generated The parameters and the types of limit which you can set for them are e Line density high low and step e Base density high low and step e Line temperature high low and step e Density temperature high low and step e Line pressure high low and step e Alarm X and Y high and low e Specific gravity high low and step Page 9 1 Chapter 9 Additional facilities 9 4 9 5 9 6 Fallback values and modes A fallback value is used as a temporary substitute for a parameter if a live input i e the transducer transmitter or wiring which is normally used to calculate the parameter should fail A fallback must have one of the following modes e None The system uses whatever value is available for the parameter regardless of whether or not the live input has failed e Last good value The system uses for the parameter the last value prior to failure e Fixed value The system uses whatever fixed value you have specified for the fallback You can set fallback values for e Line density e Base density e Line temperature e Line pressure s Specific gravity e Density temperature e Atmospheric pressure e CO2 and N2 e Energy Cv m Analogue 0 and 100 values These are values which specify the zero and span of analogue in
93. ed format Meter temperature 5 00 Deg C ks Set Figure 6 2 A typical software parameter screen in VIEW mode What the display shows Line 1 Shows the parameter description Some words are abbreviated Line 2 Shows the present value or text for indirection type Line 3 Shows the measurement units if any This line is blank if there are no units Line 4 The right hand side shows LIVE SET FB FALLBACK or FAIL to indicate the state of the present value shown in Line 2 where appropriate These indications mean LIVE The data shown is live data received from the transducer transmitter connected to the 795x or calculated by the 7858 rather than a set value SET There is a fixed value for the data this value does not change unless you enter a new fixed value or make it live FB A fallback or default value has been used to obtain the value for the data FAIL The live input has failed most likely due to no transducer transmitter being connected or a calculation failed to complete due to incorrect configuration An alarm will be raised causing the Input Alarm LED to flash on the front panel For troubleshooting this alarm see chapter 8 Optionally Line 4 may also show the parameter s unique identification number location ID which is required when setting up certain features e g Multi view You can toggle this information on off by the a button Page 6 3 Chapter 6 The keyboard display and
94. em alarm LED 2 Input alarm LED 3 Limit alarm LED Figure 6 5 Alarm Indicators Page 6 7 Chapter 6 The keyboard display and indicators 6 10 Summary of button functions The tables here provide a visual summary of the function for each button when in various modes BUTTON WHAT THE BUTTON DOES WHEN moving around in VIEW mode in one of the following EDIT modes the menus Text editing Multiple choice option selection Numeric editing U ni selection UP ARROW a and time editing NS Pages up in a menu Does nothing Scrolls through character set Does nothing if first Scrolls through available opti options page already shown Does nec DOWN ARROW RA Pages down in a menu Does nothing Scrolls through character set Does nothing if last Scrolls through available options page already shown Does Sent MAIN MENU Goes to the first page Goes immediately to Does nothing C button d button INFORMATION MENU MULTI VIEW DISPLAY Page 6 8 of the top level menu Goes to the first page of the previous menu Chooses the menu option on line 1 Chooses the menu option on line 2 Chooses the menu option on line 3 Chooses the menu option on line 4 Goes to a menu for Alarms Events Flow Status and Operating Mode Goes to a menu for setting up and printing reports plus data archiving Goes to the defined MULTI VIEW display Table 6 1 Summary of what
95. emp value K Base pressure value Follow one of these routes Route 1 for SGERG Route 2 for AGA NX19 mod Route 3 for AGA NX19 mod3h Route 4 for AGA NX19 Appearance of these prompts depend on selection for SGERG Selector Route 1 Route 3 Edit SGERG parameters No Nx19 3H parameters No No gt No gt Yes gt Yes gt Yes Yes 4 Live CO2 value SGERG selector C L Selection Live N2 value y gt N2 CO2 Cv RD H2 K Methane y y N2 CO2 Cv H2 K Ethane y y N2 CO2 RD H2 L Propane y y N2 Cv RD H2 Hydrogen y Y CO2 Cv RD H2 K SG Prime value Y K Energy 4 SG Prime value i 1 1 b Route 2 Edit Nx19mod parameters N Yes Live CO2 value y K Live N2 value y K SG Prime value Route 4 Edit NX19 parameters No Yes Yes AGA NX19 method K Selection Standard calc E Curve fit Y K Live CO2 value Y k Live N2 value Y K SG Prime value Bs To Part 1 a1 Line density Wizard Map Part 3 of 3 Page 10 15 Chapter 10 Configuring your instrument by using wizards 10 13 Base density wizard This wizard configures the 795x for getting base density A and or base
96. entered security code will change the access level to World Page 11 35 Chapter 11 Configuring by using the menus Setting or changing a password This can only be done when the present access level is Programmer From the main menu select the Other parameters option Next select the Security option Choose the password option i e Programmer Engineer Operator or World you want to set or change then type in a password of up to 20 characters Ifthere is an existing password you can clear it first by pressing the CLR button You can if you wish have the same password for more than one level This gives you access to the facilities of all the levels covered by that password From Configure option on Main Menu A Wizards LA Display formats 7 9 Analogue inputs lt b Communications 7 bj Flowmeter details Alarms og as Transducer details ff Display contrast f m ee CoS EN acora g __ 4 c EL Y c L J Transmitter detail L 3j J Security e L 3 Programmer passwd a Flow rate b Computer cal b Engineer passwd b Totalisers 6 Calibration code Kg Operator passwd n i i j T World passwd J v Line density wy d V N d V p m l A J Base density 3 Specific gravity 5 Energy 6 i 3 Custom application F v l pp M di E23 mA outputs F7 L 2 Other parameters b Multiview KY o L v J Loo N d Page 11 36
97. er failure e Battery low if a battery is fitted e Watchdog e RAM checksum failure e ROM checksum failure Input alarms caused by one or more of e Failure of analogue inputs e Failure of density transducers e Incorrect data has been entered Limit alarms caused by one or more of e Limits which you have set e Limits defined by the system Chapter 8 Alarms These always result in two alarms one when the change first happens and another when the system returns to its normal state Alarm indicators The 795x has three LED indicators to show alarm status one each for Input System and Limit Alarms Each alarm indicator can be in one of three states Off The system is working normally Flashing An alarm has been received but has not yet been accepted On All alarms has been accepted but not yet cleared The conditions that caused the alarms in the first place may still exist 1 System alarm 2 Input Alarm 3 Limit Alarm Figure 8 1 Alarm indicators on the front panel Page 8 1 Chapter 8 Alarms 8 1 3 How alarms are received and stored When a new alarm is received the appropriate indicator LED on the front panel starts flashing If the indicator is already flashing because of a previous alarm it continues to do so If the indicator is already ON steady it starts to flash Information about alarms is stored in two logs e The Alarm Status Display This gives 1 a summary of the contents of th
98. etwork operating systems that have their own protocols such as Netware also support TCP IP The measured temperature of the fluid in the pipeline Transducers are typically designed to work at 20 C A correction must be applied when working at other temperatures Text which you can enter into the signal converter Typically this is a parameter name when you configure Multiview Unit of heat 1 therm is the heat required to raise 1000 pounds of water through 100 F Page A 7 Appendix A Glossary Transducer Upload Viscosity Volume flow rate VOS Wizard Wobbe index Page A 8 A device which converts a physical quantity such as temperature or pressure to a voltage or some other electrical quantity that can be measured and analysed U To receive data or programs from another instrument Opposite of Download V In a liquid the resistance to that force which tends to make the liquid flow The rate at which a given volume of fluid flows through the system Velocity of Sound W One of the standard configurations whch you can select instead of configuring the 7951 from scratch You can edit the resulting configuration to meet your requirements A measure of the amount of heat released by a gas burner of constant orifice It indicates the quality of the gas and is given by the expression al Vp 2 Where V the gross calorific value in BTU per cubic foot at STP p specific gravity A
99. exited 24 Press the MENU button 25 Press the a button twice The display looks similar to that shown in Figure 2 3 although values and titles shown may vary Page 2 3 Chapter 2 Getting started Prime density value 265 34 Kg m3 Live Figure 2 3 Prime Line density display CALIBRATION CERTIFICATE SerialNo 123456 Cylinder No 123456 Amplifier No 123456 PRESSURE TESTED TO 375 BAR Calibration Date 14JUL97 7812xx GAS DENSITY METER DENSITY CALIBRATION FOR NITRIGEN AT 20 DEG C Based on Pressure Temperature Density Data in IUPAC Tables DENSITY PERIODIC TIME kg m2 us 502 190 504 507 506 697 513 168 523 735 DENSITY KO K1 TV K2 T 2 534 078 544 202 KO 1 104252E 02 563 880 K1 1 882012E 02 582 895 K2 4 749797E 04 601 307 619 124 636 442 653 310 669 758 TEMPERATURE COEFFICIENT DATA Dt DI 1 K18 t 20 K19 t 20 K18 1 36E 05 K19 8 44E 04 USER GAS OFFSET DATA Nitrogen Methane Gas Mixture Over Density Range 10 to 60 KG M3 K3 G Y K3 354 DA Dt 0 00236 K4 57 4 Dt K4 t 273 where T Periodic Time uS DA Actual Density KG M3 Gas Specific Gravity t Temperature DEG C DI Indicated Density KG M3 Ratio of Specific Heats Dt Temp Corrected Density KG M3 FINAL TEST amp INSPECTION Ref No GD04 V1 5 BE Figure 2 4 Circled areas on an example calibration certificate showing where to find values
100. first appears starts the selection process The up down arrow keys cycle through available options Pressing the enter key confirms the option displayed as the one chosen Pressing enter a second time makes the wizard continue The wizard selection screen is always shown after exiting a wizard Route will be continued where there is a unique connector with a matching code Note that the letter in the code is unique to a wizard A is used for the Flow meter wizard Orifice route Route continues from a connector with a matching code The letter in the code is unique to a wizard A is used for the Flow meter wizard Orifice route This provides information for a prompt that follows For example in the Line Density wizard the value ofn will be seen to complete a PTZ descripor PTZn will be PTZ 1 when n 1 PTZ n will be PTZ 2 when n 2 Page 10 2 Figure 10 2 Key to wizard map conventions Chapter 10 Configuring your instrument by using wizards 10 4 Quick start Guide Set up Wizards Wizard Density 1 Density 2 Density 1 amp 2 SG1 amp 2 Line density Base density Specific gravity Pressure Special Calc Analogue outputs Alarms Multi view Full Setup Measurement Task e Gas density measurement nominated as density A from a single transducer that is connected to Density input 1 e Gas density measurement nominated as density B from a single transducer that is conn
101. gen exceeded mA input failed Input A mA type analogue input has failed Additional character seen is the channel number mA input no cal System A mA type analogue input is not calibrated Additional character seen is the channel number mA out cal fail System A mA type analogue output calibration has failed Additional character seen is the channel number mA output failed System A mA type analogue output has failed Additional character seen is the channel number mA output no cal System A mA type analogue output is not calibrated Additional character seen is the channel number Power fail System Power supply to the 795x has been interrupted Pressure limit Limit H igh L ow or S tep limit for Line pressure exceeded Prt input failed Input A PRT input has failed Additional character seen is the channel number Prt no cal System A PRT type analogue input has not been calibrated Additional character seen is the channel number Pulse out limit Input Maximum number of pulses exceeded on a particular channel SG compare limit Limit Limit for comparison of SG A and SG B values exceeded SG limit Limit H igh or L ow limit for specific gravity exceeded SpEqu1 calc fail Input Incorrect data caused Special Equation 1 to fail SpEqu2 calc fail Input Incorrect data caused Special Equation 2 to fail Std volume limit Limit Limit for standard volume exceeded Timeperiod failed Input A time period input has failed Additional character
102. hat the menu system does The menu system lets you e Configure the 795x s Operate it e View data and settings stored in the 795x e Edit data stored in the 795x How the menu system works When you power on the 795x the menu system appears immediately after the routine Power On Self Test POST is completed If it is the first power on since the software was installed a screen appears showing the software version number and the issue number e g 2550 Iss 1 00 00 if this is not the case the screen will be the last visited menu location prior to powering off or a power failure Press the MAIN MENU button once and page 1 of the top level menu will appear see Figure 7 1 The menu system is a tree like structure that repeatedly branches to lower levels until a final screen is reached Page 1 of a top level menu shown in Figure 7 1 It comprises four menu choices Flow rates Flow totals Density and Viscosity Each menu choice has a description e g Flow rates and a triangular icon e g gt alongside to indicate the type of menu choice A non filled triangular icon P indicates the menu choice leads to a lower level menu sub menu A filled triangular icon K indicates the menu choice leads to a parameter screen Flow ratesb Flow totalsb E gt Densityb 1 ViscosityD Note The menus may be different in your software Figure 7 1 page 1 of a top level menu Page 7 1 Chapter 7 The menu system Each menu choi
103. he b button then input the factor K2 from the Calibration Certificate that was gravitometer shipped with the meter calibration 16 Press the b button then ENTER to confirm the K2 value factors 17 Press the b button then input the factor KO from the Calibration Certificate that was shipped with the meter 18 Press the b button then ENTER to confirm the KO value Skip over other 19 Press the c button several times to answer NO to all questions until the wizard is questions exited View how you 20 Press the MENU button have configured 21 Press the c button and then press the a button The display looks similar to that Specific gravity shown in Figure 2 8 although values shown may vary Page 2 7 Chapter 2 Getting started SG Prime value 0 000 Live Figure 2 8 Prime Specific Gravity display View the 22 Press the MULTI VIEW DISPLAY button The display looks similar to that in Multiview Figure 2 9 although values and titles shown may vary display From Multi view key T i kr A Density 0 0007 2 Temp 0 000 b Pressure 0 000 V Mass rate 0 000 KS a LA Invalid Multiview a Page b V M dl Figure 2 9 Multi View display End of Worked Example 2 Page 2 8 Chapter 2 Getting started Example 3 7951 with a mA type temperature transmitter About this example This example shows you how to connect a mA type temperature transmitter to the 7951 and then use the
104. he velocity of sound factors that are used for correcting line density Two methods are provided 1 Pressure method This method is preferred and is for applications where live pressure measurement is available to the 795x 2 Specific gravity method This is also known as the User Gas Equation Method It is for applications where pressure measurement is not available Inputs of Specific Gravity and Temperature are required Equation F 1 1 Density with the correction for the effect of V O S 2 i 5 T C K 2 T Cg Where p lt True line density V O S corrected Menu Data lt Meter dens A gt Using p2p1 p4 Line density uncorrected Ce V O S of calibration gas mS e e See Equation F 1 2 Cg V O S of measured gas m s eee e PERS See either Equation F 1 3a pressure method or F 13 b SG method K Density transducer VOS constant 2 10 10 fora 7812 Gas density transducer 1 35 10 for a 7810 Gas density transducer 2 62 10 for a 7811 Gas density transducer t Periodic time of density transducer output signal in us Page F 1 Appendix F Calculations and theory Page F 2 Also for both methods the velocity of sound of the calibration gas is calculated by the 795x using the following equation Equation F 1 2 V O S of the calibration gas Using Where And 2 3 Cc Ka Kg p1 Ko P1 K
105. iew See note 5 ee a E R Exit Wizard Appears for Fallback value only Exit Wizard Wizard Map Notes 1 Route detours to a Density Temp B sequence as seen in the Temperature wizard map before continuing 2 Route detours to a Special Equation wizard map sequence before continuing 3 Route detours to an Analogue output wizard map sequence before continuing 4 Route detours to a User Alarm wizard map sequence before continuing 5 Route detours to a Multiview wizard map sequence before continuing Density 2 Wizard Map Part 1 of 2 Page 10 8 Chapter 10 Configuring your instrument by using wizards Temperature amp VOS Correction Sequences From Part 1 an page Density B corrections Selection None Y Temp and VOS y vos VOS y Temp None Temp K Transducer A K18 Y K Transducer A K19 Y Calibration Temp Y Density A offset Route returns to Edit Density B Limits amp Fallback prompt on previous page unless VOS correction has also been selected Appears for Ra e only Appears for P method only t Line dens B VOS type L Selection gt P method Y SG method Y Density Transducer A K Selection gt 7812 N2 high y 7812 N2 low y 7811 AR high
106. ifts to the left of the screen 3 Input the identifier you want This over types any existing identifier 4 Press the b button again The new details shift back to the right of the display Page 12 9 Chapter 12 Routine operation 12 11 Printed reports The two types of report The 795x can print out reports which give you information about the state ofthe system There are two types of report e Current report This shows the data currently stored in a list of up to 20 locations which you specify e Alarm log report This shows the current contents of the alarm log plus data from a list of up to 20 locations How to define a list of locations for reports Find and note down the location IDs for all parameters you want to include in the list If you are unsure how to find location IDs it is explained in the section on configuring Multiview NOTE If you have more than one 795x it is advisable to include the Unit ID in the report list so that you know which instrument the report refers to Use the five page menu shown in the diagram to define your list Note that your list can include up to 20 locations J Print reports Define lists Print report Report type J Location 5 Current list Alarm list Location2 bj Location 3 Location 4 M f A 4 L J Location 5 F t Location 6 v lt i Location 7 Options a and b each v Location L go to identical 5 page 5 3 k menus
107. ignore these for the moment as alarms are explained later in this manual You can now proceed to configure your 7951 see Chapters 8 11 If the POST fails to complete switch off the power supply and check all connections and the DIP switch settings Then re connect the power supply If the POST still fails to complete switch off again and contact your supplier Chapter 6 The keyboard display and indicators 6 The keyboard display and indicators 6 1 What this chapter tells you This chapter tells you e How the front panel is laid out e What the buttons and indicators do e What characters you can display 6 2 The layout of the front panel Figure 6 1 shows the layout of the keyboard The diagrams at the end of this chapter give a visual summary of what each of the buttons do oa PF ON FS DOWN ARROW 7 UP ARROW MULTI VIEW DISPLAY LEFT ARROW 10 RIGHT ARROW 11 BACK 12 ENTER INFORMATION MENU LIMIT ALARM LED INPUT ALARM LED SYSTEM ALARM LED MAIN MENU 13 14 15 16 PRINT MENU STREAM RUN SELECT F1 software specific function SECURITY LED AND LOCK Figure 6 1 The layout of the front panel Page 6 1 Chapter 6 The keyboard display and indicators 6 3 What the display shows The display can show the following information Numerical data in floating point exponent or integer formats Text descriptors Units of measurement if applicable Status of parameters i e set
108. igure option on Main Menu Wizards Flowmeter select A Flow meter a Mass rate Type of meter D Std volume rate Analogue inputs Flowmeter details Transducer details Bs fen m M LM d Value 7 a High limit R Transmitter detail Flow rate Totalisers Low limit c iv Line density V N d Value P7 3 Standard vol type b High limit cl v Low limit I f S Figure 11 15 Menu structure for configuring flow rate Page 11 15 Chapter 11 Configuring by using the menus 11 10 Configuring totalisers Page 11 16 LIVE Input data Gross volume rate Qg turbine only GROSS VOLUME Actual cycle time TOTAL Q i VOLUME Actual cycle time TOTAL G MASS Actual cycle time _ TOTAL Gg STANDARD VOLUME Actual cycle time _ TOTAL so ENERGY Actual cycle time zi BL TOTAL Total ptr E ALARM Alarm a TOTAL ERROR Turbine 1 error pulses TOTAL ERROR Turbine 2 error pulses TOTAL Figure 11 16 Totalisation calculations RESULTS Gross volume total Increment Volume total Increment Mass total Increment Standard volume total Increment Energy total Increment Alarm total Increment Turbine 1 total Increment Turbine 2 total Increment From Configure option on Main Menu LA Wizards a Analog inputs b Flowmeter details S fy Transducer detail
109. ii Chapter 12 Routine operation 12 Routine operation 12 1 What this chapter tells you This chapter tells you how to carry out all those procedures which are a part of the normal operation of the 795x It does not cover configuration servicing or repair These topics are dealt with elsewhere in this manual 12 2 Viewing the data The diagrams on the following pages show that part ofthe menu structure which you use to carry out many of the procedures described in this chapter The diagrams show the first second and third levels of the menu structure except for that part which is concerned with configuration which is covered in a separate chapter Where an item is shown in brackets the actual value or setting appears at this point The most common examples are Value The display shows the actual value of the parameter Units The display shows the actual units Live or set The display shows either LIVE or SET according to the setting of the input Page 12 1 Chapter 12 Routine operation Main Menu Level 2 menus Level 3 menus men Flow rates N Volume flow rate N Selection name 4 Flow totals BB 77 Mass flow rate b Value b Line density c Std vol flow rate 3 Units c i 3 Energy flow rate U Live or set V Base density SG d v N gy flow rate N d EN Livi d f LA J Gross flow rate M l 3j b il c A J N a Volume flow total P es j Selection name la Mass flow total
110. ile memory RAM FRAM DBM bad triple System Notification that one or more copies of the data were corrupted This problem is corrected automatically but the configuration needs to be checked Additional character that may be seen 0 RAM 1 ZNVM copy1 2 NVM copy2 3 padding beyond repair Page 8 4 Chapter 8 Alarms Comparison limit of density A and B measurements exceeded Dens comp limit Limit Additional alarm message letters L Line density B Base density Dens temp A limit Limit Hligh L ow or S tep limit for DensityA temperature exceeded Dens temp B limit Limit Hligh L ow or S tep limit for DensityB temperature exceeded Density cal fail System A particular density input has not been calibrated Additional character seen is the channel number Gas slave fail Limit MODBUS communications with a 795x configured as a Gas Slave have failed Line dens limit Limit H igh L ow or S tep limit for line density exceeded Line temp limit Limit H igh L ow or S tep limit for Line temperature exceeded LineTxdr Calcfail Input A line density calculation failed because of incorrect data Live CO2 limit Limit H igh or L ow limit for live carbon dioxide exceeded Live Energy limit Limit H igh or L ow limit for live energy exceeded Live N2 limit Limit H igh or L ow limit for live nitro
111. indicators In VIEW mode the buttons that you can use are a button b button C button d button STREAM RUN SELECT BACK MAIN MENU On off toggle for displaying the parameter s unique identification number location ID This is displayed to the left of the status indication on line 4 Puts the 795x into EDIT mode so that you can edit the data on line 2 The data being edited is left justified whilst in EDIT mode See next section Puts the 795x into EDIT mode so that you can select from a list of the units in which the data can be displayed The units are left justified whilst in EDIT mode See next section Puts the 795x into EDIT mode so that you can select a status Set or Live The status is eft justified whilst in EDIT mode See next section If there is more than one stream metering run and there is a number on the far left of display line 4 this button will select another stream metering run The screen will be refreshed with attributes value units and status for that stream metering run Returns you to the previous step Takes you straight to page 1 of the top level menu 6 7 Using the buttons to edit information You can Edit text Select an option from a multiple choice list Edit numerical information Edit the date and time 6 7 1 Text editing Once in EDIT mode see earlier the buttons that you use to edit text are Page 6 4 2
112. ing the data LIVE or SET e Changing the units which are displayed e Changing the value which is displayed There are limits on what the display shows and as a result what you can edit For example Atmospheric Pressure has a value and units and can be made live or set On the other hand you cannot SET the Alarm Total there is no point in doing so neither can you display units for it 12 5 Making data values Live or Set To make any value live or set Go to the menu which displays the parameter its value and units where applicable Toggle the d button to show LIVE or SET as you wish For example to set the value for Prime Base Density 1 Refer to the first Menu Structure diagram 2 Go to the Level 3 menu which is headed PRIME BASE DENSITY 3 Press the d button This toggles between LIVE and SET Leave it on whichever setting you want Page 12 8 12 6 12 7 12 8 12 9 Chapter 12 Routine operation Changing the units which are displayed To change the displayed units 1 Go to the menu which displays the parameter its value and units 2 Press the c button The name of the unit currently in use shifts to the left ofthe display 3 Press the UP ARROW or DOWN ARROW button to scroll through the list of units Stop at the one you want 4 Press the c button The unit you have selected shifts back to the right of the display Changing fallback values To change the fallback values 1 Go to the menu which display
113. ion 7951 3 5 Typical installations The diagram below illustrates a typical installation utilising the 7957 Part of pipeline Transducers and transmitters PT Static pressure transducer 4 wire PRT DT Density transmitter TE Temperature element PRT Alarm Frequency Analogue outputs 4 20mA aa ao ao gg ee Gar A 1 1 T T Printer MODBUS communications to and from host computer Figure 3 2 Typical installation for A Gas Signal Converter system 3 6 Checking your software version The 7951 is driven by pre loaded software which differs according to the application for which the instrument is to be used To check hardware configuration see Ordering Information in Appendix C PREFIX DIGIT 1 DIGIT 2 DIGIT 3 DIGIT 4 HARDWARE METERED FLOW STREAMS SPECIAL PLATFORM PRODUCT METER CHANNELS 50 7950 1 GAS NONE 1 SINGLE 0 9 51 7951 2 LIQUID ORIFICE 2 DUAL 3 BOTH TURBINE PD 3 TRIPLE 4 OTHER VENTURI 4 QUAD MASS 5 1 2 3or4 MULTI PREFIX DIGIT 1 DIGIT 2 DIGIT 3 DIGIT 4 SOFTWARE VERSION NUMBER Figure 3 3 Software version number Page 3 3 Chapter 3 About the Micro Motion 7951 For example for a 7951 Dual Channel Gas Signal Converter the software version number is 511020 You can find the software version number in two ways 1 Itis printed on a label at the rear panel of the 7951 2 Itis written into the menu structure see Chapter 12 Page 3 4 Chapter 4 What you
114. ities of gases and liquids It does this by communicating with transmitters such as pressure temperature level flow density and analytical instruments These measurements are then corrected for temperature pressure and velocity of sound Full scale The composition of a gas used in calculating energy and compressibility Page A 3 Appendix A Glossary Hazardous area Health check Hg Historical log Hub Instrumentation earth Interrogate Joule Jumper K factor Kinematic viscosity Page A 4 H An area where there is a risk of fire or explosion A check that all inputs and devices connected to the 7951 are operating normally The chemical symbol for the element Mercury A log of every alarm received by the 7951 A common connection point for devices in a network Hubs are commonly used to connect segments of a LAN A hub contains multiple ports When a packet arrives at one port it is copied to the other ports so that all segments of the LAN can see all packets A passive hub serves simply as a conduit for the data enabling it to go from one device or segment to another So called intelligent hubs include additional features that enables an administrator to monitor the traffic passing through the hub and to configure each port in the hub Intelligent hubs are also called manageable hubs In a large installation where the instrumentation and chassis are earthed separately this is the clean e
115. l K M 4 4 Isentropic r l Pipe expand coeff Orif expand coeff v Orif tapping code N LA J Mass rate cal sel l Flowstop threshold m Figure 11 12 Menu structure for configuring flowmeter details els m Flowstop threshold M imi eo aoe Page 11 13 Chapter 11 Configuring by using the menus 11 9 Configuring flow rate LIVE Input data in turbi RESULTS ee LL GROSSVOLUME ae y FLOW RATE Qg LIVE Input data sy turbine TURBINE X METER requency LINEARISATION FACTOR niina K factor LinK Factor curve Tr Kt Kp FIXED Input data turbine temp press temp ref corrections corrections RESULTS AH CORRECTIONS x3600 Qv K factor curve Frequency for flow factors 1 10 flow factors 1 10 FIXED Input data LIVE High Low Input data limit limit d N 4 Y N Prime density RESULTS MASS FLOW RATE LIMITS Vol flow rate Qg Figure 11 13 Calculating turbine mass and volume flow rate Page 11 14 Chapter 11 Configuring by using the menus LIVE FIXED ALARM Input data Input data If limits are High Low exceeded EN RESULTS Prime base STANDARD VOLUME density FLOW RATE LIMITS Qs Mass flow rate CALCULATION LIVE FIXED Input data ALARM Input data imi p RD Air density High Low ie ww RESULTS STANDARD VOLUME Mass flow rate FLOW RATE LIMITS Qs CALCULATION Figure 11 14 Calculating standard volume rate From Conf
116. lacement of parts 14 Removal and replacement of parts Warning e Electricity is dangerous and can kill Disconnect the power supply before making any connections or dis assembling the 7951 14 1 Front Panel Assembly 1 Undo and remove the four screws which secure the Bezel to the case Withdraw the Front Panel Assembly to the limits of the connecting wiring then lay it on top of the case 2 Partially withdraw the Processor Board then disconnect the two connectors from the Processor Board The Front Panel Assembly is now free 3 Replace all items by reversing this procedure Take great care to ensure that the cables are not pinched on re assembly Front Panel Assembly Switch panel Display Display Processor and bezel cable Board Wy gt PLI PL2 A s M AE K Display fixing screws Bezel fixing Case and washers 4 off screws 4 off Figure 14 1 Removing the Front Panel Assembly 14 2 Display 1 Remove the Front Panel Assembly as explained in Section 14 1 2 Undo and remove the four screws and washers which attach the display to the Front Panel Assembly 3 If required unplug the ribbon cable from the display 4 Replace all items by reversing this procedure Page 14 1 Chapter 14 Removal and replacement of parts 14 3 Switch Panel 1 Remove the Front Panel Assembly as explained in Section 14 1 2 Undo the four screws and washers which attach the display to
117. lc select L Selection gt AGA NX19 Y SGERG Y AGA NX19 mod3h Y AGA NX19 mod y Base temp value K Base pressure value Follow one of these routes Route 1 for SGERG Route 2 for AGA NX19 mod Route 3 for AGA NX19 mod3h Route 4 for AGA NX19 Appearance of these prompts depend on selection for SGERG Selector Route 2 Edit Nx19mod parameters N Yes K Live CO2 value v K Live N2 value y K SG Prime value Route 1 Route 3 Edit Edit SGERG parameters No Nx19 3H parameters No No No Yes gt Yes gt Yes Yes Live CO2 value SGERG selector y L Selection k Live N2 value Y gt N2 CO2 Cv RD H2 E Methane Y v N2 CO2 Cv H2 K Ethane y y N2 CO2 RD H2 L Propane y y N2 Cv RD H2 K Hydrogen y y CO2 Cv RD H2 4 SG Prime value Y K Energy Route 4 Edit NX19 parameters No Yes Yes AGA NX19 method K Selection Standard calc 5 Curve fit Y K Live CO2 value Y k Live N2 value y L SG Prime value T To Part 1 page xm A Base density Wizard Map Part 2 of 2 Page 10 17 Chapter 10 Configuring your instrument by using wizard
118. lisation 11 10 Line density Line density 11 11 AGAS density compressibility Normalisation of gas components Nx 19 compressibility Linear interpolation compressibility SGERG compressibility Density referral Base density Base density 11 12 Prime base density Specific gravity Specific gravity 11 13 Prime specific gravity Energy Energy 11 14 Energy rate Custom application User calculations 1 and 2 11 15 mA outputs mA outputs 11 16 Other parameters 11 17 Multiview 11 18 Page 11 2 Chapter 11 Configuring by using the menus 11 4 What Sections 11 5 11 18 tell you Each section tells you how to configure one parameter The format of each section is Where necessary a statement which tells you what information you must have to configure the parameter Where necessary a block diagram showing how the instrument uses information from the transducers Live Data and information you give it Fixed Data to calculate the value of the parameter A diagram which shows that part ofthe menu system which you use to configure the parameter Sections 11 17 Configuring other parameters and 11 18 Configuring Multiview have a slightly different format from the others because of the special nature of the topics they deal with The table on page 11 2 lists the items which you can configure and for each the calculations if any which are involved in obtaining the value of the item In the menu diagrams where an item i
119. live Skip over other questions View how you have configured Line temperature Chapter 2 Getting started Turn on the power to the system The system goes through a Power On Self Test POST routine which takes less than 30 seconds When it is finished ignore any flashing alarm lights which may appear Press the MENU button to go to Page 1 of the Main Menu if you aren t there already Press the DOWN ARROW button twice to go to Page 3 of the menu Press the b button to select Configure Press the a button twice to go to the wizards menu Press the b button then the UP ARROW or DOWN ARROW button to scroll through the option list until nitialise is shown 10 Press the b button to select Initialise 11 Press the d button to confirm that you want to lose the current configuration 12 Wait a few seconds until initialise on line 2 of the display changes back to Choose option 13 Press the b button then the UP ARROW or DOWN ARROW button to scroll through the option list until Temperature is shown 14 Press the b button to select Temperature 15 Press the d button to answer YES to the question Edit Line Temperature 16 Press the b button 17 Press the UP ARROW button until Analogue input 1 appears 18 Press the b button and then the ENTER button to confirm selection of Analogue input 1 19 Press the b button 20 Press the UP ARROW button until PT100 input appears on line 2
120. live failed or fallback if applicable Alarm and event information Current time and date Identification number location ID of parameter Stream metering run identification number if applicable 6 4 How the buttons work The buttons let you Move around the menus View data stored in the 795x VIEW mode Edit the data EDIT mode Some buttons do different things according to where you are in the menu system For example a Es ENTER button C button INFORMATION MENU button PRINT MENU button This button does nothing until you get into EDIT mode After you have edited the data of a parameter pressing ENTER accepts the changes and puts the 795x back into VIEW mode When you move through the menu structure this selects any menu choice shown against the button However when in VIEW mode pressing C lists the display units This button does nothing if you are in EDIT mode At other times it takes you to a special menu that provides information on alarms events flow status and 795x operating mode This button does nothing if you are in EDIT mode At other times it takes you to a special menu dealing with data archiving and printing of reports 6 5 Using the buttons to move around the menus A general tour of the menu system is provided in chapter 6 The buttons which you can use to move around the menu system are V UP ARROW DOWN ARROW a d buttons Moves the displa
121. ll cores The instrumentation cables should have individual screen s foil or braid over each twisted pair and an overall screen to cover all cores Where permissible and depending on the earthing scheme employed at the installation the overall screen should be connected to the earthed metal work at both ends 360 bonding where possible This may have multiple protective earth connections to the pipe work or the building structure and not connected to the individual screen s or Instrumentation or Zener barrier grounds The individual inner screen s should be connected at one end only normally the controller e g Flow Computer end These should be connected to the Instrumentation or Zener barrier ground Use suitable cables that meet BS5308 multi pair Instrumentation Types 1 or 2 Set DIP switch 3 Set DIP switch position 1 to PRT for Analogue input 1 PT100 on Analogue Input 1 7951 Klippon D type Power PL7 1 SK7 14 PL7 2 SK7 15 PL7 3 SK7 16 PL7 4 SK7 17 PRT Notes 1 Specified 7951 pins are for Analogue Input 1 2 DIP switch position 1 must be set to PRT Figure 2 14 DIP switch and safe area wiring for a PRT type temperature transmitter Page 2 14 Turn on the power Go to the wizards menu Clear existing configuration This is optional Select the wizard Start of wizard Choose the Analogue Input Choose the type of Analogue Input Make the Analogue Input Channel
122. ll duplex or RS485 half duplex 19K2 XON XOFF and or RTS CTS RS232 full duplex or RS485 half duplex 19K2 XON XOFF and or RTS CTS Modbus ASCII RTU Master Slave and Peer Data type IEEE 32 and 64 bit 16 bit integers optional Commands 03 04 06 and 16 Page C 7 Appendix C Technical data for the 7951 Hardware facilities Microprocessor Memory Keyboard interface Display Real time clock Battery monitor Page C 8 Processor Clock speed Computation resolution Computation accuracy Program storage Data storage Options Number of keys Key scan time Debounce Options Number of lines Characters per line Backlight Contrast Options Accuracy Power Options Type Options Motorola 68332 24 MHz 64 bit IEEE 754 fully floating point maths package Embedded Real time operating system lt 1 part in 10 2 Mbyte FLASH field upgradeable using serial link and Winboot software tool 2 Mbyte of RAM battery backed by internal Lithium cell as used by real time clock also Battery life is typically 2 years if 7951 is un powered or 5 years if powered 16kB FRAM non volatile store for calibration data None 30 2ms 14ms None 4 20 alpha numeric LED continuously powered software selectable temperature compensated None 1 part in 90000 Replaceable Lithium button cell CR2430 Battery life is typically 2 years if 7951 is un powered or 5 years if powered
123. lly a gas In a large installation where the chassis and instrumentation are earthed separately this is the dirty earth to which instrument chassis are connected In data transmission a checksum is a number which is added to a string of data and whose value is related to that data It is used to check that the data has been transmitted accurately The part of a cable that plugs into a port or interface to connect one device to another Most connectors are either male containing one or more exposed pins or female containing holes in which the male connector can be inserted 1 The setting up of an instrument by entering data setting fallback values setting alarms and so on so that it works according to your requirements 2 The method by which transducers and other inputs and outputs are physically connected to the 7951 This has a volume between detectors that permits a minimum accumulation of 10 000 direct unaltered pulses from the meter under test A multiplying factor which accounts for the difference between the actual frequency of a particular crystal and its theoretical frequency See Calorific value D See Digital to analogue converter Suppressing the oscillations in a vibrating body or medium Used in the petroleum industry to describe the density of petroleum products A degree API is given by 141 5 SG at 60 F 131 5 Values lie within the range 1 to 101 the larger the number the lighte
124. lorimeters 0 4 20mA Inputs from devices which transmit information as pulses For example a turbine or positive displacement flowmeter Inputs from devices where the frequency of the transmitted signal is related to the parameter being measured These include e Density transducers e g 7835 or 7826 e Base density transducers e Viscosity transducers e g 7827 One of two levels to show the state of some part of the system such as whether a valve is open or closed Outputs from the signal converter to those devices such as chart recorders which require analog outputs 0 4 20mA For equipment such as pulse summators or electro mechanical totalizers open collector Outputs to equipment whose status is to be changed as for example an output which opens or closes a valve open drain For receiving and sending information to other devices linked to 7957 These include e Printers e Host computers e Master or slave 7951s Chromatographs etc Appendix C Technical data for the 7951 s POWER SUPPLIES Inputs d c only Outputs d c only These provide power within the 7951 and to some other external devices such as transducers Isolation The isolation between the enclosure and all DC power notes inputs signal inputs and signal outputs is 5OVDC continuously OR 125VDC for less than 15 seconds Consequently isolation between any two signal lines and any DC power line is 100VDC continuously OR 250V
125. m In this example the Density 1 wizard is used to configure a connection as follows e Asingle densitometer is connected to Density Input 1 Work through the example by following the instructions below If you are not sure where the buttons are refer to Chapter 6 Connect the 1 Wire the meter to the 7951 as in meter Figure 2 1 for a 7810 or a 7811 gas density meter OR Figure 2 2 for a 7812 gas density meter Note Refer to meter documentation for other wiring arrangements 2 Earth the 7951 to a suitable earth point EMC Notes To meet the EC Directive for EMC Electromagnetic Compatibility it is recommended that the Flow Computer be connected to transducers using a suitable instrumentation cable containing individually shielded twisted pairs and an overall screen to cover all cores The instrumentation cables should have individual screen s foil or braid over each twisted pair and an overall screen to cover all cores Where permissible and depending on the earthing scheme employed at the installation the overall screen should be connected to the earthed metal work at both ends 360 bonding where possible This may have multiple protective earth connections to the pipe work or the building structure and not connected to the individual screen s or Instrumentation or Zener barrier grounds The individual inner screen s should be connected at one end only normally the controller e g Flow Computer end These should be
126. n Methane 10 to 60 kg m 830 222 59 006 Nitrogen Methane 60 to 200 kg m 1389 4 205 455 Argon Methane 60 to 200 kg m 2186 01 310 079 Micro Motion Operating Manual HB511020 Rev A 7951 Signal Converter November 2007 The Emerson logo is a trade mark and service mark of Emerson Electric Co Micro Motion is a registered trademark of Micro Motion Inc All other marks are the property of their respective owners We reserve the right to modify or improve the designs or specifications of product and services at any time without notice USA International Emerson Process Management Emerson Process Management Micro Motion Inc Mobrey Measurement 7070 Winchester Circle 158 Edinburgh Avenue Boulder CO 80301 Slough Berks SL1 4UE UK T 1 303 527 5200 T 44 1753 756600 1 800 522 6277 F 44 1753 823589 F 1 303 530 8459 www mobrey com ss www micromotion com EM ERSON s
127. ne n Decane Water i Butane n Octane Helium n Pentane Oxygen Methane i Pentane Carbon monoxide Figure 11 20 Calculating normalisation of gas components Page 11 19 Chapter 11 Configuring by using the menus LIVE Input data Line temperature Line pressure Prime SG CO2 N2 LIVE Input data Line temperature Line pressure Prime SG CO2 N2 LIVE Input data Line temperature Line pressure Prime SG CO2 N2 Cv Page 11 20 FIXED Input data Full Kelvin mA Tbase Pbase method offset RU e Nx 19 COMPRESSIBILITY CALCULATION FIXED Input data Tbase Pbase mA bod d Nx 19mod COMPRESSIBILITY CALCULATION FIXED Input data Kelvin mA Tbase Pbase offset Nx 19mod3h COMPRESSIBILITY CALCULATION RESULTS Compressibility Z Super compressibility FPV Mg Zbase RESULTS Compressibility Z Super compressibility FPV Mg Zbase RESULTS Compressibility Z Super compressibility FPV Mg Zbase Figure 11 21 Calculating Nx 19 compressibility Chapter 11 Configuring by using the menus LIVE FIXED Input data RESULTS Input data K10 K11 K12 K13 Tbase Pbase Eae ana LINEAR INTERPOLATION Line pressure COMPRESSIBILITY Z CALCULATION Zbase Line temperature Base density Figure 11 22 Calculating linear interpolation compressibility LIVE FIXED Input data RESULTS Input data KDe Line pressure Differential DENSITY Upstream pressure RE
128. nent form If you want to accept the changes you have made press the b The 795x will then revert to VIEW mode Note ENTER also does this If you want to accept the changes you have made press the ENTER key The 795x will then revert to VIEW mode Note b also does this Clears the line you are currently editing If you do not want to keep the changes you have made press the BACK button to abandon the changes and go back to VIEW mode Numerical entry When you type in a number the first digit appears at the eft of the display and each successive digit is then positioned to the right of the one just entered A number being entered over types any existing number Parameter identification number Location ID entry These appear on the display in the same way as for numerical entry However when you accept the number by pressing b or ENTER the text descriptor of the parameter with that particular number appears on line 2 You will encounter this type of pointer indirection editing if configuring the Multi view display see chapter 11 6 7 4 Date and time editing The date and time are displayed in the format dd mm yyyy hh mm ss When you edit the date and time the cursor moves to the right but skips the and characters lt CLR x LEFT ARROW RIGHT ARROW 0 9 buttons b button ENTER CLEAR BACK Moves the cursor to the left Moves the cursor to the righ
129. ng the data on display line 2 and you are satisfied with the b change you have made press the b to accept the change and go back to VIEW mode Note The ENTER button also does this C button If editing the measurement unit selection and you are satisfied with the change you have made press the C to accept the change and go back to VIEW mode Note The ENTER button also does this d button If editing the status selection and you are satisfied with the change you d have made press the d to accept the change and go back to VIEW mode Note The ENTER button also does this t ENTER If you are satisfied with the change you have made press the ENTER button to accept the change and go back to VIEW mode CLR CLEAR Restore the previous contents x BACK If you do not want to keep the changes you have made press the BACK button to abandon the changes and go back to VIEW mode 6 7 3 Numerical editing Once in EDIT mode see earlier the buttons that you use to edit numerical data are LEFT ARROW Erases the digit to the left of the cursor 0 0 9 buttons Each button enters a single digit 9 l PLUS MINUS This changes the sign of the number Pressing it will toggle between PLUS and MINUS signs Page 6 5 Chapter 6 The keyboard display and indicators CLR x EXPONENT b button ENTER CLEAR BACK Inserts a decimal point Use this button if you want to show numbers in expo
130. non secure mode Turbine Voltage Selection switches The Turbine Voltage Selection switch is a DIP switch on the PSU Board which is accessible through removal of parts see Chapter 14 Choose between 8 volts dc or 16 volts dc for all flow meters powered by the 7951 The 7951 is shipped with the switch set for 8 volts dc For flow meter connection details see chapter 2 Page 5 3 Chapter 5 Installing the system 5 7 Step 4 Fitting the 7951 A Caution You must not fit the 7951 where it may be subjected to extreme conditions or be liable to damage For further information about the environmental conditions within which it can operate see Appendix C 1 Firstly referring to Figure 5 2 cut out an aperture in the front panel for each instrument which is to be mounted on it w 2941mm Aperture for the Aperture for the instrument instrument 1741mm Aperture for the Aperture for the 14 5mm instrument instrument Ld k t 192 1mm Tan v Figure 5 2 Minimum dimensions for a panel with apertures to fit four 7951 s 2 Each instrument is mounted in a clamp which is fixed to the rear of the front panel as shown in the two diagrams that follow The 7951 unit j 3mm Mounting Clamp Panel with aperture 101mm gt im 278 7mm gt J Location Moulding Figure 5 3 Before assembly gt 7 2mm
131. ns FB type ad Alarms K ed No See note 4 Fallback value Yes C Last Good Value No Edit To de RE TR EON Y ME ER 7 i wae K Prime density FB val Multi view See note 5 E VA a E R Exit Wizard Appears for Fallback value only Exit Wizard Wizard Map Notes 1 Route detours to a Density Temp A sequence as seen in the Temperature wizard map before continuing 2 Route detours to a Special Equation wizard map sequence before continuing 3 Route detours to an Analogue output wizard map sequence before continuing 4 Route detours to a User Alarm wizard map sequence before continuing 5 Route detours to a Multiview wizard map sequence before continuing Density 1 Wizard Map Part 1 of 2 Page 10 6 Chapter 10 Configuring your instrument by using wizards Temperature amp VOS Correction Sequences From Part 1 at page Y Density A corrections Line dens A VOS type Selection K Selection gt P method a Ks Y Temp and VOS Sextnelliod VOS VOS Y Y Temp Density Transducer A K Selection N T SS S gt 7812 N2 high Transducer A K18 Y en 7812 N2 low Y K Transducer A K19 7811 AR high Y Density A offset Route returns to Edit Density Limits amp Fallback prompt on previous p
132. nstallation Step 7 Connect power supply The steps in the procedure are explained in the following sections Step 1 Drawing up a wiring schedule Before you make any connections you must draw up a wiring schedule to help you identify wiring colours and make sure that you do not connect more items of any given type than are allowed If you are in doubt check the specification in Appendix C A blank copy of a wiring schedule is given in Appendix B Page 5 1 Chapter 5 Installing the system 5 5 Step 2 Unpacking the instrument Remove the instrument from its packing and examine it to see if any items are loose or if it has been damaged in transit Check that all items on the shipping list are present If any items are missing or if the equipment is damaged contact your supplier immediately for further advice Note If you have ordered an option card this is already installed in the 7957 Table 5 1 What should be supplied with the 7957 Klippon Item Quantity Mounting Clamp Assembly Captive screws Mounting strap Location moulding Socket identification label 9 way D type plugs 9 way connector hoods 4 way socket 10 way sockets OO x OF XO x X N A 2 Amp glass fuse this is a spare Table 4 2 What should be supplied with the 7951 D type Item Quantity Mounting Clamp Assembly Captive screws Mounting strap Location moulding 9 way D type plugs 9 way D type connector hoods 25 way D type
133. nto Multiview To see the Multiview display press the Multi view DISPLAY button The Multiview display looks like co the example below Text width setting a movable boundary between text and value u gt a A Dens 0 669 im Temp 0 000 2 Dens 0 669 V Temp 0 000 T d Text parameter name Value of in this case parameter Figure 11 42 A typical Multiview display Page 11 37 Chapter 11 Configuring by using the menus Configuring Multiview Outline ofthe procedure for configuring Multiview Step 1 Step 2 Step 3 Step 4 Step 5 Page 11 38 Decide what text you want to display You almost certainly want each line of the Multiview display to show the name possibly in an abbreviated form of a parameter whose value you want to display Bear in mind that e Text cannot exceed 11 characters e The display leaves a space between the text and value e The value is displayed as a number without any units You may wish to include the units as part of the text Find the location IDs of the parameters 1 In the menu system find the parameter you want 2 Press the a key to display the location ID 3 Note down the location ID 4 Repeat this for the other parameters For example To find the ID of the location where Line Density is stored go to the Level 3 menu headed Line density value The display looks like this Open the Multiview configuration menu Open the Multiview configuration menu
134. nverter does The 7951 Gas Signal Converter is primarily used to convert signals from one format to another There is a need for this conversion when a system is unable to accept a raw signal from a transducer or perhaps some intermediate signal processing is required A common conversion is where a frequency input from a 7812 gas density transducer can be accepted by a 795x and then transmitted by the same 795x through an analogue output as a 4 20mA signal In this application the 7951 can calculate e Line density 3 from Transducer PTZ method or mA type input e Specific gravity 3 from Transducer mA type input or Base density e Base density 3 from Specific gravity method PTZ method or mA type input e Energy Cv m from AGA 5 method or mA type input Note Dual channel measurements are available for Items marked with a It can also obtain e Line temperature e Densitometer temperature e Density pressure e Atmospheric pressure e Percentage of CO2 from a mA type input e Percentage of N2 from a mA type input e Compressibility from S GERG NX19 NX19mod or NX19 3h e Special equations 1 and 2 Page 3 1 Chapter 3 About the Micro Motion 7951 3 3 Physical description of the 7951 The main body of the 7951 is a one piece aluminium extrusion which provides the best possible EMC protection The keyboard and display is attached to the front of the instrument and all electrical and communications connec
135. o P1 Cc V O S of the calibration gas in m s p line density un corrected or temperature corrected KA Kg Kcand Kp are coefficients from the appropriate K column of Table F 1 The gas flow computer automatically selects the appropriate value for each K coefficient by using this table Equation F 1 3a V O S of the measured gas pure or composition for pressure method Using Where And 5 yo P 10 02 3 CG ere P1 K6 P1 Cg V O S of the measured gas in m s p1 Line density un corrected or temperature corrected P Line pressure in barA Ks K5 and yo are constants that must be SET into the 795x For a pure gas values can be taken from the appropriate columns of table Table F 2 For gas compositions these pure gas constants should be modified in proportion to the volumetric fraction percentage of each gas component Appendix F Calculations and theory Table F 1 K Coefficient Look up Values Calibration Density rande Gas y g 0 100 Kg m 349 007 0 530984 E 01 0 595473 E 02 0 314834 E 04 0 400 Kg m 348 994 0 044632 0 297076 E 02 0 418178 E 05 0 250 Kg m 442 987 0 579479 0 623017 E 02 00 0 400 Kg m 318 079 0 913056 E 01 0 155044 E 03 0 2564 E 06 Notes e The density range of the transducer is selected when configuring line density e There is no support for other calibration gases e Temperature is assumed to be 20 C Table F 2 Gas data and
136. o the Analogue output wizard sequence before continuing 2 3 Route detours to the User Alarm wizard sequence before continuing 4 4 Route detours to the Multiview wizard sequence before continuing SG2 Application Wizard Map Page 10 11 Chapter 10 Configuring your instrument by using wizards 10 11 SG 1 amp 2 Application Wizard This wizard can be used to configure a system that has 3096 gas specific gravity transducers connected to Density input 3 and Density input 4 Special equations analogue outputs user alarms and multi view can also be configured here Setup wizard SG1 amp 2 Edit Gravitometer A B No No gt Yes gt Yes SG A K2 Y SGAKO SGBK2 Y SG B KO FE SE Edit SG an Limits amp Fallback No No Yes K SG hi limit y k SG low limit y k SG comp limit v Prime SG FB type K Selection Fallback value Y Last Good Value L Prime SG FB value ms Appears for Fallback value only Edit Special equations No gt Yes gt See note 1 No Edit Analog outputs No Yes No See note 2 Edit User Alarms No Yes See note 3 No Edit Multi view No See note 4 Exit Wizard Wizard Map Notes 1 Route detours to the Special Equation wizard sequence before continuing 2
137. on selection Numeric editing lits selection T a and time editing Does nothing Accept changes and go into VIEW mode Moves the cursor left Does nothing Erases the last digit Moves the cursor right Does nothing Deletes character at cursor Reverts to original selection Clears the line of numerals Restores the previous contents Does nothing Inserts a decimal point Changes to upper or lower case Does nothing Changes the sign of a number Insert a space at the cursor Does nothing Inserts an exponent Does nothing Enter a digit Does nothing Table 6 2 Summary of what the buttons do Part 2 of 2 Page 6 9 Chapter 6 The keyboard display and indicators Page 6 10 7 1 7 2 7 3 Chapter 7 The menu system The menu system What this chapter tells you Before you can configure and operate the 795x you should have some understanding of how the menu system works The menus are simple and intuitive so they should present no problems to the average user This chapter gives you a general tour showing how to navigate the menu system to find application parameter screens and other types of screen such as for entering passwords Note The menus and parameters will differ between software versions and can differ between releases of a software version Chapter 12 features tables showing the routinely used operator parts of the menu system used in your software W
138. ortion of the Ethernet standard that specifies how a cable is to be connected to a transceiver that plugs into a 15 pin socket B A unit of pressure 1 bar 10 Nm Base or Standard Conditions give the volume which would have been transferred if the temperature were at a pre defined figure The actual values for base temperature and pressure vary from country to country Density of a fluid measured under base conditions The energy required to raise the temperature of one pound of water through one degree Fahrenheit See British Thermal Unit C To assess the performance of an item of equipment against that of another one whose accuracy is known Page A 1 Appendix A Glossary Calibration certificate Calibration constant Calorific value Chassis earth Checksum Connector Configuration Conventional pipe prover Crystal factor CV DAC Damping Degree API Degree Baume Page A 2 Each transducer is calibrated before it leaves the factory The details together with the transducer s serial number are recorded on a Calibration Certificate Among the information given on the calibration certificate are some constants unique to that transducer which compare the transducer s actual performance against a standard The signal converter must know these constants before it can calculate accurate results The constants are designated KO K1 K2 and so on The energy content of a substance usua
139. plugs 25 way D type connector hoods 4 way socket 090 Oi Q Q a N a 2 Amp ceramic fuse this is a spare Page 5 2 5 6 5 6 1 5 6 2 Chapter 5 Installing the system Step 3 Setting DIP switches Some types of connection may require DIP switches to be set Analogue Input DP switches The 7951 has two blocks of DIP switches on the Processor Board as shown in Figure 5 1 e SW switches select whether each input is 4 20 mA or PRT e SW2 switches not used in the current version of 7951 The setting of each switch in the SW2 block must be the same as the corresponding pair of switches in the SW1 block The 7951 may not work correctly otherwise The 7951 is supplied with the DIP switches in these default settings e Input 1 PRT e Inputs 2 4 4 20mA PRT Part ofthe 7951 Processor Board Figure 5 1 DIP switches on the Processor Board If you want to change the Analog Input switch settings you must also configure the inputs This is explained in chapter 11 After the configuration has been completed the 7951 should be switched into the secure mode to prevent unauthorised or accidental tampering with the instrument s configuration Note QD e The 7951 is always shipped from the factory with the security lock on the front panel set to the
140. ppendix B Blank wiring schedule Appendix B Blank wiring schedule Page B 1 Appendix B Blank wiring schedule Page B 2 Appendix B Blank wiring schedule SJUSLIWOD Jo jeeus ou uid 9 JoyoauUu0D OU uid 9 J0j2euuo2 oweN Jnojoo5 BuulM jueuunJjsu X367 JeuJeg suonoeuuoo EUJ9 X3 jnp y s Hui Page B 3 Appendix B Blank wiring schedule Page B 4 Appendix C Technical data for the 7951 Appendix C Technical data for the 7951 C 1 What this Appendix contains e Ordering information understanding model codes s List of different types of external connections you can make to 7951 e Technical Specification e Rear panel connector diagrams and pin identity tables e Internal earthing arrangements C 2 Ordering information Note To find out the exact model you have locate the model code on the rear panel and then use this table Code Product 7951MA MA 7951 Micro Motion Signal Converter Code Rear Panel E connector 4 analog i p s as standard 8 analog inputs if option 8 below D type connectors l 4 analog i p s as standard 10 analog inputs if option 8 below Software Application Gas applications 1020 Signal Converter software Liquid applications 2010 Signal Converter software Non standard software please specify full version and issue number with order Code Communication Ports Thre
141. pure of composition for S G method Using Where And Where And Notes Es CG1 z 1 C ees Cg V O S of the measured gas in m s Cc V O S of the calibration gas in mS ee e een See Equation F 1 2 t Periodic time of density transducer output signal in us K Density transducer VOS constant 2 10 10 fora 7812 Gas density transducer 1 35 10 for a 7810 Gas density transducer 2 62 10 for a 7811 Gas density transducer CG1 14 p Ka A072099 49 273 t t Calibration temperature SG Specific gravity le For calibration gas g For measured gas yo Low pressure ratio of specific heats or Gamma See notes below K3 and K4 are constants that must be SET into the 795x See notes below s K3and K4 are normally taken from the calibration certificate that was issued with the gas density transducer Alternatively the following table has typical values that can be used e Ideal values for Specific Gravity can be taken from Table F 2 In practice the live Specific Gravity measurements may be more appropriate s Fora measured pure gas a value for yg can be taken from Table F 2 e Fora measured composition of gas a value for yg can be taken from Table F 2 but needs to modified in proportion to the volumetric fraction percentage of each gas component Page F 4 Table F 3 K3 and K4 Values Nitroge
142. put 5 8j of this menu mA output6 b mA output 7 ol v mA output 8 Wy Al LA Status outputs 7 9 16 binary digits b L E E v S Page 12 5 Chapter 12 Routine operation Level 2 menus From Part 1 of this menu Page 12 6 Normalise gas data Orifice details Totals Chromat Level 3 menus 3 Methane b Ethane b cj Propane B n EE n Butane KW a l ENS buan n Pentane m_b i Pentane fy n Hexane a a LV n Heptane 7 a n Octane m n Nonane V n Decane Ky m ea m ES c Nitrogen bj Carbon dioxide V Hydrogen sulphide m 4 TH a E Helium b Oxygen E v Carbon monoxide u a Ea res A Hydrogen l 2 Argon 7 b Live inputs c V N gq j Beta N Orif dischar coeff b Orif expand factor E Vel of approach v I pp N LA Reynolds number 2 f Corr pipe diameter 7 b Corr orif diameter Dg V Press loss value L d ud LA Mass rate K factor 7 9 m c Vj N d Standard e 9 Maintenance b n E V N a Menu structure Health check Part 2 Main Menu Flow rates 7 Flow totals Line density V Base density SG N f c4 Temperature et Energy Y Raw gas data M Custom application Mi Health check Password MW Configure L a Time 7
143. puts and outputs Live and set data What are live and set data Stored data can be either live or set Live data is continually updated by new data received from transducers or other transmitters Set data is data that you have entered via the keyboard it does not change unless you enter new data Why should I want to set data You may want to set data for reasons such as e You Want to test the flow computer s programming If you want to test the flow computer s programming it is much easier if you use known fixed data e You don t want to monitor a particular parameter constantly or don t want to monitor it at all If a parameter is not likely to change significantly or if it is not important to measure it accurately you may not want to connect a transducer or transmitter In this case set data may be accurate enough for your purposes e A particular transducer or transmitter is out of action You can temporarily set the data to a fixed representative value until the transducer is repaired or replaced Page 9 2 9 7 Units which the 795x can display The 795x can display data values with many different units as listed in Table 9 1 below However when communicating with other devices the data is always sent using the standard units In Table 9 1 the following definitions are used e Standard units e Other units Units which you can choose instead of the standard Chapter 9 Additional facilities Units which
144. r the oil A unit on an arbitrary scale which can be converted into actual SG values Used when describing the sugar content of aqueous solutions Degree Brix Density Differential pressure Digital to analogue converter Download DP EMC Event External connection Fallback mode Fallback value Flow computer FS Full composition Appendix A Glossary A unit on an arbitrary scale which can be converted into actual SG values Used when describing the sugar content of aqueous solutions The measured density of the fluid in a pipeline The difference in pressure at two points in a pipeline A circuit that converts digital signals into analogue equivalents See also Analogue to digital converter To send data or programs to another usually subsidiary instrument Opposite of Upload See Differential pressure E Electro Magnetic Compatibility A change in the system operation Events may be caused by the user such as setting a parameter or changing the security or by alarms if for example a fallback is invoked when the system fails A generic term which covers inputs outputs power supplies and serial communications in short anything connected to the 7951 F A description of the system when it is using a Fallback value A value used as a temporary substitute for a parameter when a live input which is used to calculate the parameter fails An instrument which monitors flow rates and dens
145. ral equ ptr b Y General equ ptr c Y General equ ptr d Y General equ ptr e Y General equ ptr f Y General equation b Free form text Exit Special Calc wizard General equ2 const A y K General equ2 const B y K General equ2 const C y General equ2 ptr t y User sp eq2 text K Free form text I Exit wizard Multi view Wizard Map Page 10 27 Chapter 10 Configuring your instrument by using wizards 10 19 Analogue outputs wizard Setup wizard Analogue Outputs Edit Edit Analog output 1 Analog output 2 No gt No gt Yes gt Yes gt Note n is the number of LET the mA output being configured R ag mA output n source Y K mA n param val 100 Y mA n param val 0 Analogue output n type mA output n filter K Selection gt Normal i Y Averaging i Y Oversampling i Y K mA output n value Return to the next edit prompt OR exit wizard if there are no more prompts Analogue outputs Wizard Map Page 10 28 Edit Analog output 8 No gt Yes gt Note This prompt needs the input of a location identifier e g 0450 Selection gt 0 20mA input Y Note 4 20mA input i This sequence is identical for each analogue output Exit wiz
146. ransmitter wizard sequence before continuing from here Route detours to the Special Calc wizard sequence before continuing from here Q Note n is the number of the input channel selected earlier a 4 Live energy 100 Y Live energy 0 Y Analogue input n type Selection gt PT100 input y 0 20mA input Y 4 20mA input y Input channel n Page 10 31 Chapter 10 Configuring your instrument by using wizards Page 10 32 Chapter 11 Configuring by using the menus 11 Configuring by using the menus 11 1 11 2 The recommended way of configuring the 795x is by using wizards as explained in Chapter 10 But you should use the methods given here if e You want to configure an installation which is very different from the examples shown in Chapter 10 e You want to change only a part of an existing configuration irrespective of how it was configured in the first place e You are experienced in using the 795x menus What does configuration involve After you have installed the instrument and made sure that it is working you must tell it e What inputs the field transmitters are connected to e How input data is to be processed e How results are to be output There is a default configuration which covers a general application However it i
147. rk at both ends 360 bonding where possible This may have multiple protective earth connections to the pipe work or the building structure and not connected to the individual screen s or Instrumentation or Zener barrier grounds The individual inner screen s should be connected at one end only normally the controller e g Flow Computer end These should be connected to the Instrumentation or Zener barrier ground Use suitable cables that meet BS5308 multi pair Instrumentation Types 1 or 2 Set DIP switch 3 Ensure that the DIP switch inside the 7951 is set as shown in Figure 2 12 Loop powered 7951 4 20mA pressure transmitter Klippon D type Power PL9 5 SK8 24 PL8 2 SK8 2 PL8 3 SK8 3 PL9 8 SK8 25 Notes 1 Specified 7951 pins are for Analogue Input 3 2 DIP switch position 3 must be set to 4 20mA Figure 2 12 DIP switch and safe area wiring for a mA type pressure transmitter Page 2 12 Turn on the power Go to the wizards menu Clear existing configuration This is optional Select the wizard Start of wizard Choose the Analogue Input Set Analogue 0 and 100 range Select the type of Analog Input Make the Analogue Input live Skip over other questions View how you have configured Line pressure Chapter 2 Getting started Turn on the power to the system The system goes through a Power On Self Test POST routine which takes less than 30 seconds When i
148. robably faulty Connector Board YES Is the transmitter sending current to the 795x NO The transmitter or Refer to the its configuration transmitter s manual is probably faulty for more information YES Is the 795x configured correctly 2 NO Correct the configuration YES The 795x s input Replace the 795x s circuit is probably Connector Power faulty Supply Board Figure 11 3 Fault finding chart 1 No reading from a transmitter Caution A e Whilst carrying out this procedure you must wear and earthed wrist strap at all times to protect the instrument against static shock Page 13 2 PROBLEM The display is blank Is the power to the 795x ON NO YES Has the fuse in the 795x blown YES NO Is the security LED on the 795x lit NO YES Turn the power ON Is the 795x s supply voltage within spec 795x s Connector Power Supply Board is probably faulty The 795x s Display Module is probably faulty Chapter 13 Routine maintenance and fault finding Adjust the voltage so that it is within spec Replace the fuse by one of the correct rating Replace the 795x s Connector Power Supply Board Replace the 795x s Display Module Figure 12 2 Fault finding chart 2 The display is blank Page 13 3 Chapter 13 Routine maintenance and fault finding Page 13 4 Chapter 14 Removal and rep
149. rts Pulse outputs Status outputs Group 2 isolated power supply Status inputs Group 3 isolated power supply Analogue inputs Frequency inputs Analogue outputs The diagrams on the next two pages shows you how to earth the external connections Page C 12 Appendix C Technical data for the 7951 Pin 10 PL9 eee eee es Pin 1 Analogue Power SS Pin 10 PL5 000000000 Pin 1 Density Power Group 3 Pin 10 Connect external earths as PLA 0060400068 required I 1 Turbine Power Internal Isolated Supply ANALOGUE OUTPUTS PL6 feooeoooooe Pin 1 Pin 10 Internal Isolated Supply STATUS e 90 0990 9 lt Group 2 TES ana Pin 10 INPUTS een Pin 1 No earthing is required for Status Inputs Opto isolator common only PL2 serere STATUS B E OUTPUTS Pin 10 Status Outputs Common PULSE gt PL3 666666668 6 OUTPUTS i Pin 10 Pin 1 oO PISCE GTOUPO Pulse Outputs Common 1 Pin 9 Group 1 SK3 I SERIAL Chassis and instrumentation i PORT Seen are earthed together Pin 1 1 unless you cut the link Protect Ground n Pin 9 PORT Pin 1 Common Protect Ground n Pin 9 Ski PORT Pin 4 Common Link R gt t Chassis I Earth Earth PL2 66060 stud E E 0v
150. run stream software Q9 0 o Ov amp 09 MN 10 Indicates that there are alarm entries AFTER this one 11 Scroll DOWN through the entries 12 Scroll UP through the alarm entries 13 Clear all alarm entries Figure 8 3 A typical entry in the log Each alarm has its own entry in the Historical Alarm Log that tells you e Type of alarm Whether it is a System alarm Input alarm or Limit alarm and if the alarm is on or off e Extra identifier for the alarm This is not always shown for every entry but where it is shown it could be one of the following e A digit This indicates the channel number on which the fault occurred e A letter H and L are for high and low Limit alarms S is for a step alarm s Date and time The date is in the format DD MM YY and the time HH MM SS These are entered automatically by the system when the alarm is received The time is accurate to within one second Page 8 3 Chapter 8 Alarms e Acceptance indication This is only shown for those entries that have not been accepted When the entry is accepted the indicator disappears e Other entries indication An up arrow symbol shows that there are entries before the present one whilst a down arrow symbol shows that there are others after If the entry currently shown is first in the list there is no up arrow If it is last there is no down arrow e Description of the alarm This is an abbreviated description of the alarm and should be sufficient
151. s 10 14 Specific gravity wizard This wizard configures the 795x for getting specific gravity A and or specific gravity B data Setup wizard Specific Gravity Specific Gravity Auto A route prime selection followed by A gt the B route B gt B Automatic Analogue input Turn to Edit SG B selection Part 2 Edit SG A calc p No Time Period gt page Y 2 Base density gt Base Density dig od Analogue input gt Yes Time Period K SGAK2 Prime Base Density Y Y K SGAKO K Base density of Air Edit SG Limits amp From Fallback Part 2 page No Yes K SG hi limit Y K SG low limit Y k SG comp limit Y Prime SG FB type K selection gt Fallback value Y Last Good Value Appears for i Prime der sity FB Lya mE Fallback value Be Mme gensy na ya only Exit i wizard Base density Wizard Map Part 1 of 2 Page 10 18 Chapter 10 Configuring your instrument by using wizards Sequence Specific gravity B measurement from an analogue input From n Patr page Edit 5 No Turn to SG B analogue input 2 Part 1 page Yes SG B mA Src K Selection mA input 1 Y mA input 2 v mA input 10 Y L SG Q 100 Y L S6Q0 Y
152. s Connector board assembly D type connectors Rear Panel Klippon connectors Rear panel D type connectors Switch panel with cable Keyswitch and retainer Processor board Power supply board M3 crinkle washer 15 way cable M3 hexagonal full nut M4 thumb nut M4 hexagonal full nut M4 plain washer Nylon spacer 3 5mm ID x 8mm long Hexagonal spacer M3 x 13mm long M3 x 6mm pan head screw M4 crinkle washer M3 x 8mm pan head screw 2 Amp glass fuse Lithium battery CR2430 Quantity Page 15 3 Chapter 15 Assembly drawing and parts list Page 15 4 Appendix A Glossary Appendix A Glossary ADC Address Alarm API Analogue input Analogue output Analogue to digital converter AUI Bar Base condition Base density British Thermal Unit BTU Calibrate A See Analogue to digital converter A number which uniquely identifies a location An indicator which shows when a failure has occurred Alarms are classified as System Input or Limit American Petroleum Institute An input where information is received in analogue form An output from which information is transmitted in analogue form A circuit that converts analogue voltages or currents into digital usually binary numbers which can then be processed by computers The digital signal gives the amplitude of the analogue signal at a particular instant See also Digital to analogue converter Short for Attachment Unit Interface the p
153. s 1 cel d LA Transmitter detail a Flow rate b Totalisers mJ Line densit v ine density d Pulse outputs Totals roll over Reset totals Inhibit totals Clear pulse output Chapter 11 Configuring by Figure 11 17 Menu structure for configuring totalisers using the menus A Pulse output 1 l 3j Pulse output 2 7 b u gt Pulse output 3 6 p _Pulse output 4 aay LA j Pulse output 5 l aj _ b EX c V i gt A Volume FE gt Mass b Standard volume 6 Ener r 5 EA o E S 4 Gross volume Alarm b Main turb error l B Loo RSS d L Reset totalisers 7 S Setting b c V L BS d Volume total 9 Mass total b Std volume total c v Lem lt LA Gross volume total r5 c V L d Clear pulse outputs amp Selection b B V ii JS 4 Page 11 17 Chapter 11 Configuring by using the menus 11 11 Configuring line density LIVE Input data Time period A L density L press SG TH Trans KO K1 K2 K18 K19 K3 K4 K5 K6 gamma Density VOS Correct ducer caltemp type ions CALCULATE LINE DENSITY Transducer A Tp calibration SGVOS Press FIXED Input data UnRef Referral density Offset select i i RESULTS DENSITY Line A DENSITY an REFERRAL m density Orifice only AB LIVE FIXED Input data RESULTS Input data Tbas
154. s shown in brackets the actual value or setting appears in the menu at that point For example Value The display shows the actual value of the parameter Units The display shows the actual units Live or set The display shows whether the parameter is LIVE or SET Page 11 3 Chapter 11 Configuring by using the menus CALIBRATION CERTIFICATE 78123A GAS DENSITY METER SERIAL NO nnnnnn CYLINDER NO AMPLIFIER NO CALIBRATION DATE PRESSURE TESTED TO 375 BAR DENSITY CALIBRATION FOR NITROGEN AT 20 DEG C Based on Pressure Temperature Density Data im IUPAC tables DENSITY PERIODIC TIME KG M3 uS n nnn nnn l nn nnn nnn 2 SOO nn nnn nnn DENSITY KO K1 T K2 T 2 nn nnn nnn eX nnn nnn nnn NKO n nnnnnE nn nnn nnmennn l K s n nnnnnE nn nnn nnn nnn S z nnn nnn innn K2 n nnnnnE nn nnn nnn nnn nnn nnn nnn TEMPERATURE COEFFICIENT DATAN NN _ Dt DI 1 K18 t 20 K19 t 20 K18 n nnnE nn ARK K19 n nnnE nn ll USER GAS OFFSET DATA XS d Argon Methane gas mixture over density range 60 to 200 KG M3 mI G K3 nnn DA 0 00236 K4 nnn n t 273 where T Per dic time uS DA Act al Density KG M3 Gas Specific Gravity t Temperature DEG C B E sitee DI Indicated Density KG M3 Ratio of Specific Heats Dt Temp Corrected Density KG M3 TESTER oc Ref No xxnnnn Vn n DATE XXXXXXX Page 11 4 Figure 11
155. s the parameter its value and units 2 Press the b button The value currently displayed shifts to the left of the display 3 Input the value you want This over types the existing value 4 Press the b button The value you have entered shifts back to the right of the display Changing the time and date To change the time and date 1 Go to the Level 3 menu where the time and date are displayed 2 Press the b button The time and date currently displayed shifts to the left of the display 3 Input the new date and time This over types the existing figures 4 Press the b button The new details shift back to the right of the display Checking the performance of the 795x If you want to check that the external connections are working properly the Health Check facility can help you It shows for each external connection e the name of the input or output e the value of the data e the units for the data e whether the data is live or set e the Modbus or location ID or nothing If the data is live but the value appears to be unusually high or low this may be because the external connection is not working properly 12 10 Giving your 795x a tag number If you have more than one 795x you may want to give each instrument a tag number so that in printed reports for example you know which one the report refers to To allocate an identifier 1 Select the Unit ID option on the Main Menu 2 Press the b button The cursor sh
156. s usually necessary to edit this configuration to suit particular needs Before you start Before you begin configuring you must obtain the calibration certificates for all the field transmitters connected to the 795x The diagram on Page 11 4 shows an example of a typical calibration certificate If you have followed the installation procedure given in Chapter 5 the instrument is ready to be configured Otherwise you must make sure before continuing that e The dip switches for the analogue inputs are set as explained in Chapter 5 e All instrumentation has been connected e The instrument is powered up Page 11 1 Chapter 11 Configuring by using the menus 11 3 Recommended sequence for configuration It is recommended that you configure items in the following order 1 Inputs See Section 11 5 2 Transducer details See Section 11 6 3 Anything else such as Specific Gravity Energy Custom Application Multiview etc Do these in the order in which they appear in this chapter See Sections 11 7 11 18 Item to be configured Calculations involved if any See Section Analogue inputs 11 5 Transducer details 11 6 Transmitter details Line temperature 11 7 Densitometer temperature Atmospheric pressure Live CO2 and N2 Flowmeter details Orifice mass and volume flow rate 11 8 Turbine mass and volume flow rate Prime specific gravity Flow rate Turbine mass and volume flow rate 11 9 Standard volume rate Totalisers Tota
157. s you Hazardous and non hazardous environments Installation procedure Step 1 Drawing up a wiring schedule Step 2 Unpacking the instrument Step 3 Setting DIP switches 5 6 1 Analog input DIP switches 5 6 2 Turbine voltage selection switch 1 1 1 1 1 1 1 1 2 1 2 1 2 1 2 1 2 2 2 6 2 9 2 11 2 14 3 1 3 1 3 1 3 2 3 2 3 3 3 3 4 1 5 1 5 1 5 1 5 1 5 1 5 2 5 3 5 3 5 3 5 7 5 8 5 9 5 10 6 1 6 2 6 3 6 4 6 5 6 6 6 7 6 8 6 9 6 10 7 1 7 2 7 3 8 1 9 1 9 2 9 3 9 4 Step 4 Fitting the 7951 Step 5 Making the external connections Step 6 Earthing the instrument Step 7 Connecting the power supply The keyboard display and indicators What this chapter tells you The layout of the front panel What the display shows How the buttons work Using the buttons to move around the menus Using the buttons to view stored data Using the buttons to edit information 6 7 1 Text editing 6 7 2 Multiple choice option selection 6 7 3 Numerical editing 6 7 4 Date and time editing The 7951 character set LED indicators Summary of key functions The menu system What this chapter tells you What the menu system does How the menu system works Alarms Alarms 8 1 1 Alarm types 8 1 2 Alarm indicators 8 1 3 X How alarms are received and stored 8 1 4 Examining the Alarm Status Display and Historical Alarm Log 8 1 5 Whatthe Status Display tells you 8 1 6 What the entries in
158. seen is the channel number Timeperiod glitch Input A glitch has occurred on a time period input Timeperiod no cal System A time period input is not calibrated User alarm Limit User alarm X or Y activated Page 8 5 Chapter 8 Alarms Page 8 6 9 1 9 2 9 3 Chapter 9 Additional facilities Additional facilities What this chapter tells you You can also specify features such as e Fallback values and modes to be used if live inputs fail e Limits which if exceeded trigger alarms e The units in which the calculations are performed and are displayed The following sections give more information about these and other topics which relate to the way in which data is processed Selecting units and data formats You can select the units which the 795x uses for its calculations and in which it displays the data as well as the formats in which the data is displayed You can choose the units and formats for e Line density e Base density e Temperature e Pressure e Energy Cv m e Time period input A full list of the units metric and imperial is given at the end of this chapter Note that if you change the units the values are converted automatically to reflect the change Limits You can set limits for some parameters so that an alarm is generated if the limits are exceeded There are three types of limit e High limit The highest value which the parameter can have before an alarm is generat
159. t Each button enters a single digit If you want to accept the changes you have made press b The 795x will then revert to VIEW mode Note ENTER also does this If you want to accept the changes you have made press ENTER The 795x will then revert to VIEW mode Note b also does this Restore the previous contents If you do not want to keep the changes you have made press the BACK button to abandon the changes and go back to VIEW mode The new date and time is validated An invalid date and time is causes the message Bad date time to appear on screen for a few seconds before the previous content is restored Page 6 6 Chapter 6 The keyboard display and indicators 6 8 The 795x character set You can use any of the 96 characters shown below as part of your display Figure 6 3 The 795x character set 6 9 LED indicators Security Indicator This LED shows the present security level of the system e RED FLASHING The instrument is at Calibration level e RED Engineer level the instrument can be configured e ORANGE Operator level limits can be changed e GREEN World level no parameters can be changed Note For more information about these see Chapter 11 SC F1 1 Security Level LED Figure 6 4 Alarm Indicators Alarm Indicators These are the Input System and Limit alarms For more information about these refer to Chapter 8 Alarms and Events 1 Syst
160. t is finished ignore any flashing alarm lights which may appear Press the MENU button to go to Page 1 of the Main Menu if you aren t there already Press the DOWN ARROW button twice to go to Page 3 of the menu Press the b button to select Configure Press the a button twice to go to the wizards menu Press the b button then the UP ARROW or DOWN ARROW button to scroll through the option list until nitialise is shown 10 Press the b button to select Initialise 11 Press the d button to confirm that you want to lose the current configuration 12 Wait a few seconds until initialise on line 2 of the display changes back to Choose option 13 Press the b button then the UP ARROW or DOWN ARROW button to scroll through the option list until Pressure is shown 14 Press the b button to select Pressure 15 Press the d button to answer YES to the question Edit Line Pressure 16 Press the b button 17 Press the UP ARROW button until mA input 3 appears 18 Press the b button and then the ENTER button to confirm selection of mA input 3 19 Press the b button 20 Type in a suitable maximum pressure value and then press the ENTER button 21 Press the ENTER button to move on to the next prompt 22 Press the b button 23 Type in a suitable minimum pressure value and then press the ENTER button 24 Press the ENTER button to move on to the next prompt 25 Press the ENTER button to keep the defaul
161. t selection of a 4 20mA type input 26 Press the d button 27 Press the UP ARROW button so that Set changed Live 28 Press the ENTER button twice 29 Press the c button several times to answer NO to all questions until the wizard is exited 30 Press the MENU button 31 Press the DOWN ARROW button 32 Press the a button twice The display looks similar to that shown in Figure 2 13 although values shown may vary Line pressure 1 000 bar abs Live Figure 2 13 Line pressure data display End of Worked Example 4 Page 2 13 Chapter 2 Getting started 2 8 Example 5 7951 with a PRT type temperature transmitter About this example This example shows you how to connect a PT100 transmitter to the 7951 and then use the Temperature wizard to configure the system In this example the Temperature wizard is used to configure a connection as follows e A single PT100 transmitter is connected to Analogue Input 1 Work through the example by following the instructions below If you are not sure where the buttons are refer to Chapter 6 Connect the 1 Wire the transmitter to the 7951 as in Figure 2 14 meter 2 Earth the 7951 to a suitable earth point EMC Notes To meet the EC Directive for EMC Electromagnetic Compatibility it is recommended that the Flow Computer be connected to transducers using a suitable instrumentation cable containing individually shielded twisted pairs and an overall screen to cover a
162. the 795x displays unless you choose an alternative Note that many of the abbreviations used in the tables are defined in the glossary Parameter Temperature Pressure Differential pressure Volume total Standard volume total Mass Total Energy Total Density Base density Time Frequency Flow meter factor Gas data Viscosity Mass rate Volume rate Standard volume rate Energy rate Calorific value Table 9 1 Units of measurement Default units Deg C bar abs mbar Std m kg m kg m a I pulses m BI kg hour m hour m hour MJ hour MJ m Other units available Deg F Kelvin Pa abs KPa abs psia bar guage kPa guage MPa guage bar Pa N m2 kN m2 mm Hg in WG psi cm litres in3 barrel gallon UK Std cc Std in Std f Std gallon UK Std gallon US tonne ktonne oz Ib g GJ TJ Therm J tonnes m oz in oz barrel oz gallon UK Ib in lb ft Ib gallon UK Ib gallon US tons barrel tons gallon UK g cc g litre kg cc kg litre As for density sec min day kHz pulse ns pulse m s pulse s m pulses Vol pulse PPM Mole fraction Pa s kgf s m Reyn slug fts Mass units time units Volume units time units Volume units time units Energy units time units Energy units volume units Ohms MPa abs Pa guage psig kPa mm WG in Hg ft3 gallon US Std litres Std barrel Mtonne ton BTU kJ oz ft oz gallon US
163. the bezel Remove the display 3 Un solder the flexi cable from the key switch Remove the spring clip from the switch then withdraw the switch from the case 4 Undo and remove the four nuts and washers which attach the Switch Panel to the bezel Lift the Switch Panel away 5 Replace all items by reversing this procedure Switch Switch Panel Display Panel fixing nuts and and cable washers 4 off 2 A Le K LS Key Switch Spring Display fixing screws switch cable Bezel clip and washers 4 off Figure 14 2 Removing the Switch Panel Assembly 14 4 Processor Board 1 Remove the Front Panel Assembly as explained in Section 14 1 2 Pull the Processor Board forwards so that it disengages from the connector at the back of the case Withdraw the board from the case 3 Replace all items by reversing this procedure Take great care to ensure that the cables are not pinched on re assembly Switch panel Display Mother cable cable Board Switch Panel Processor Power Supply and Bezel Board Board Figure 14 3 Removing the Processor Board and Power Supply Board Page 14 2 Chapter 14 Removal and replacement of parts 14 5 Power supply board 1 Undo and remove the four screws which secure the Bezel to the case Withdraw the Front Panel Assembly to the limits of the connecting wiring then lay it on top ofthe case 2 Pull the Power Supply Board forw
164. to define the lists T t Location 10 Location 11 v Location 12 K 4 ig jio la m aje IL IM wo 0 99 AJ Location 13 Location 14 Location 15 v Location 16 AJ Location 17 Location 18 Location 19 Location 20 Som e LTY a Figure 12 2 Defining lists and printing reports Page 12 10 How to print a report 1 Referring to the diagram select Print reports Chapter 12 Routine operation 2 Select to print either an Alarm Log or Current Report There is a third selection Idle which lets you Some typical reports CURRENT REPORT PRT input channel 1 O0 Deg C SET TIME PERIOD P3B 0 nS SET kkkkkkkkkkkkk END OF REPORT kkkkkkkkkkkkkkkkkk ALARM LOG REPORT 1995 01 02 00 11 17 OFF Alarm power out SYSTEM 1995 01 02 00 05 46 ON Alarm power out SYSTEM 1995 01 01 23 59 50 OFF DBM corrupt sig SYSTEM 1995 01 01 23 59 49 ON Aout no cal 4 SYSTEM 1995 01 01 23 59 49 ON Aout no cal 3 SYSTEM 1995 01 01 23 59 49 ON Aout no cal 2 SYSTEM 1995 01 01 23 59 49 ON Aout no cal 1 SYSTEM 1995 01 01 23 59 49 OFF Alarm power out SYSTEM 1995 01 01 23 59 33 ON Alarm power out SYSTEM 1995 01 01 23 59 49 ON DBM corrupt sig SYSTEM PRT input channel 1 0 Deg C SET TIME PERIOD I P3B 0 nS SET Turb2 err increment 0 Analog 7 Input mode 4 20mA input ee END OF REPORT vrr leave the menu without a report being printed The report is printed immediately Page 12 11 Chapter 12 Routin
165. tors are mounted on the Rear Panel The 7951 is available with two types of rear Panel one with Klippon connectors the other with D type connectors The case contains four circuit boards The Processor Board and the Power Supply Board are mounted horizontally These are connected by plugs and sockets to the Mother Board which is mounted vertically at the back of the case The Connector Board is parallel to the Mother Board to which it is joined The Keyboard and Display are wired to the Processor Board The Connector Board holds the connectors to which external devices are linked Processor Power Board Supply Board Two types of Rear Panel m Connector Board Mother Board elel Boaogoo u H je a p Li Either Klippon connectors SK1 9 Ee 5x2 Ome ey eem eA l lt PLI rh PLZ PUO PU PLS PLS PU PL8 PLS Or D type connectors Be sx se o LI s e EA es c9 PLI JE L L a SKA SKS SK6 SK7 sks Keyboard and display Figure 3 1 The 7951 and its major assemblies 3 4 Communications The 7951 can operate as a MODBUS slave It can s Download a configuration from a PC DCS etc e Upload a configuration e Monitor random locations in the 7951 e Interrogate the alarm and data logger buffers e Manipulate the alarm and data logger buffers e Set random locations with new data e Instigate printed reports Page 3 2 Chapter 3 About the Micro Mot
166. ttery backup is installed at all times other than during replacement The 7951 Micro Motion Signal Converter will not power up correctly if this battery is missing If itis necessary to run the units without batteries for Intrinsic Safety reasons then the battery should be replaced with a shorting disk inserted in the battery holder Please consult the factory for further advice e Replace the battery when the Low Battery system alarm is indicated The procedure is in Chapter 14 CONTENTS 1 1 1 2 1 3 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 3 1 3 2 3 3 3 4 3 5 3 6 5 1 5 2 5 3 5 4 5 5 5 6 About this manual What this manual tells you Who should use this manual Software versions covered by this manual Getting started What this chapter tells you What the examples show you If you need help Example 1 7951 with a 7810 11 12 Gas density transducer Example 2 7951 with a 3096 Gas specific gravity transducer Example 3 7951 with a mA type temperature transmitter Example 4 7951 with a mA type pressure transmitter Example 5 7951 with a PRT type temperature transmitter About the Micro Motion 7951 Background What the 7951 Dual Channel Gas Signal Converter does Physical description of the 7957 Communications Typical installations Checking your software version What you can connect to a 7951 The information in this chapter has been moved to Appendix C Installing the system What this chapter tell
167. ty of purposes it is driven by software specially for your application This manual gives information about the software which applies to your machine only Throughout this manual the term 795x is used to refer to all members of the 795x family 7950 and 7951 Who should use this manual This manual is for anyone who installs uses services or repairs the 795x Software version covered by this manual The software version dealt with in this manual is given on the title page Chapter 3 tells you about the software is installed in your instrument Page 1 1 Chapter 1 About this manual Page 1 2 2 1 2 2 2 3 Chapter 2 Getting started Getting started What this chapter tells you If you are new to the Micro Motion 7951 Signal Converter the worked examples in this chapter can help you to become familiar with the installation and configuration procedures The examples are e Example 1 7951 with a 7810 11 12 See page 2 2 e Example 2 7951 with a 3096 3098 Gas Specific Gravity See page 2 6 e Example 3 7951 with a mA type temperature transmitter See page 2 9 e Example 4 7951 with a mA type pressure transmitter See page 2 12 e Example 5 7951 with a PRT type temperature transmitter See page 2 14 Work through whichever one is most like your installation What the examples show you Each example shows you how to e wire up a simple system e set the DIP switches inside the 7951 e find the menu from which you
168. ure readings Bar Page E 5 Appendix E Data tables For practical purposes when the liquid volume changes from Vo to V4 as the gauge pressure changes from zero atmospheric to P4 the above equation is simplified to B EE VoL Pa lc ISO Document TC 28 SC3 N248 Generation of New Compressibility Tables for International Use gives the following equations relating to the compressibility data log C 1 38315 0 00343804T 3 02909 log p 0 0161654T log p and B Cx10 xbar Where T oil temperature in C r oil density in kg litre at 15 C The new equation from the API Manual of Petroleum Measurement Standards Chapter 11 2 1M gives after converting to units of kg m and bar 5 62080 0 00021592xt 0 87096x10 4 2092xtx10 p 15 745 bar B 10 4e Where T temperature in C 115 density in kg m at 15 C and at atmospheric pressure This equation is valid for the density range of 638 kg m to 1074 kg m For a density range of 350 kg m to 637 kg m refer to Chapter 11 2 2M in the API Manual Velocity of sound in liquids The velocity of sound in dilational waves in unbound fluids is given by 1 c Bap 2 Where C velocity of sound Ba adiabatic compressibility p density Page E 6 Appendix F Calculations and theory Appendix F Calculations and theory F 1 The VOS effect on density measurements This sub section shows how the 795x gas flow computer software works out t
169. ve or set E V pp Mog v z LA Value 8 Base dens B src e pl gt bj PTZ1 sdl L PL N _ N Compressibility lt 2 bj c V E d LA Fallback Value P7 Limits Mode b m ca L High 5 Low a b Step ol Comparison L v Figure 11 27 Menu structure for configuring base density Page 11 25 Chapter 11 Configuring by using the menus 11 13 Configuring specific gravity LIVE FIXED Input data RESULTS Input data Ko K2 Time Period A 3096SG EE penu LIVE FIXED Input data RESULTS Input data BDensityAir CALCULATE er BDensity SPECIFIC L jet GRAVITY AS LIVE FIXED Input data RESULTS Input data 100 0 Analogue input 1 f pee ELEME Specific and SPECIFIC gravity status GRAVITY Analogue input 10 Figure 11 28 Calculating specific gravity Page 11 26 Chapter 11 Configuring by using the menus LIVE Input data l l SG3096 Time period A3 CALCULATION SG3096 Time period A4 CALCULATION Prime base SG density 7 CALCULATION SELECT B Analogue input 1 NS TU Select value and i Analogue input 10 _ status SG RESULTS Specific gravity A FIXED input data ALARM If limits are Limits Fallback od Comp High Low Step Mode Value E S PRIME SG DENSITY SELECTION Prime specific gravity Specific gravity B Figure 11 29 Calculating specific gravity Page 11 27 Chapter
170. ws how you can scroll up or down between the pages by using the UP ARROW and DOWN ARROW buttons These buttons will do nothing unless there is a page to scroll to Flow ratesb Flow totalsp P 1 Main M x Page jain Menu DensityD ViscosityD srl Temperatureb Pressureb Batchingb Valvesb Special equationb Sediment amp waterb u Vp vacet i B 4 Page 3 Main Menu 8 Page 2 Main Menu lu Note The menus may be different in your software Figure 7 3 Pages of a Main Menu Page 7 2 Chapter 7 The menu system At the lowest levels in each branch of the menu system there are parameter screens Figure 7 4 shows how to navigate to the parameter screen for lt MeterRun Temperature gt All parameter screens feature a solid black triangular shaped mark in the bottom left corner of Display Line 4 Note Full details about editing parameters can be found in Chapter 6 Flow ratesb Flow totalsb Densityb L ViscosityD Page 1 Main Menu BL T Temperatureb Pressureb Batchingb 4 Valvesb V Page 1 Temperature Menu Page 2 Main Menu zd 1x4x1 temperatureb 4x4x4 temperatureb Meter run temp 4Dens base temp cnd Y MeterRun temperature Io 5 000 Metering run Temperature Parameter Screen Deg C Set Note The menus may be different in your software Figure 7 4 A typical software parameter screen Page 7 3
171. y 7811 N2 high y 7811 N2 low Y 7810 CH4 medium y 7810 N2 low y 7812 AR high a Yo A Line density A gamma Tranducer B K3 Y Transducer B K4 Route returns to Edit Density B Limits amp Fallback prompt on previous page unless temperature correction has also been selected Tranducer B KS Y Transducer B K6 Density A offset Density 2 Wizard Map Part 2 of 2 Page 10 9 Chapter 10 Configuring your instrument by using wizards 10 9 SG 1 Application Wizard This wizard can be used to configure a system that has a 3096 gas specific gravity transducer connected to Density input 3 Special equations analogue outputs user alarms and multi view can also be configured here Setup wizard sei Edit Gravitometer A No No gt Yes gt Edit SG en Limits amp Fallback No No gt Yes p L SG hi limit y L SG low limit v Prime SG FB type K Selection gt Fallback value Last Good Value ee Nl Prime SG FB value Appears for Fallback value only Wizard Map Notes Edit Special equations No Yes gt See note 1 No Edit Analog outputs NO gt Yes No See note 2 Edit User Alarms No Yes See note 3 No Edit Multi view No
172. y c SA holder Figure 14 5 Where to find the back up battery on the Processor Board Chapter 14 Removal and replacement of parts 14 9 Rear Panel Assembly Warning It is strongly recommended that in order to ensure continued compliance to EMC directives you do not attempt to remove the rear panel assembly but return the instrument to the factory The instructions given below should only be carried out if it is absolutely necessary 1 2 Remove the Front Panel Assembly as explained in Section 14 1 Pull the Processor Board forwards so that it disengages from the connector at the back of the case Withdraw the board from the case Pull the Power Supply Board forwards so that it disengages from the connector at the back of the case Withdraw the board from the case Remove the four screws which secure the Rear Panel Assembly into the case Withdraw the Rear Panel Assembly from the case taking care not to bend the metal spring clips on the top and bottom of the Connector Board Replace all items by reversing this procedure Take great care to ensure that the cables are not pinched on re assembly and ensure that the metal clips are not bent or damaged Processor Board Rear Panel Assembly fixing screws 4 off Power Supply Mother Board Board Figure 14 6 Removing the Rear Panel Assembly Page 14 5 Chapter 14 Removal and replacement of parts
173. y up to the previous page of the menu If there is no previous page this button does nothing Moves the display down to the next page of the menu If there is no next page this button does nothing Each of these buttons selects the menu choice next to it If there is no menu choice next to a button that button does nothing Returns you to the previous step Chapter 6 The keyboard display and indicators E MAIN MENU Moves you straight to page 1 of the top level menu z INFORMATION Takes you to a special menu providing information on alarms events MENU flow status and 795x operating mode a PRINT MENU Takes you to a special menu dealing with data archiving and printing of reports ED MULTI VIEW You can define one or more display pages each showing up to four items of data lines of descriptive text or both Pressing MULTI VIEW shows the first display page you have defined Use the up down arrow buttons to page up and page down Fi F1 The use of this button is dependent on the functionality of the application software If this button is in use it will be mentioned in later chapters Note All other buttons have no effect when moving around the menus 6 6 Using the buttons to view stored data When a software parameter screen is viewed after selection from the menu the display is in VIEW mode Figure 6 2 shows a typical display when you view a software parameter screen In VIEW mode all information is in a right justifi
174. ying label on it 4 Check the wiring thoroughly against the schedule and wiring diagram 5 Attach all connectors to the Rear Panel Refer to Chapter 2 and Appendix C for examples of field transmitter connections and a full list of the 7951 s pin identities 5 9 Step 6 Earthing the instrument Caution Incorrect earthing can cause many problems so you must earth the chassis and the electronics correctly The way in which you do this depends almost entirely on the type of installation you have and the conditions under which it operates Therefore because these instructions cannot cover every possible situation the manufacturers recommend that earthing procedures should only be carried out by personnel who are skilled in such work The chassis of the 7951 must be earthed in all cases both for safety reasons and to ensure that the installation complies with EMC regulations Do this by connecting an earth lead from the stud on the rear panel Figure 4 6 to a local safety earth such as a cabinet earth or some other suitable metal structure If there is more than one 7951 see Figure 4 7 for correct and incorrect methods In addition to earthing the chassis you may have to make extra earth connections in some cases depending on the installation requirements Details of internal earthing arrangements are in Appendix C Crinkle washers a i LS s ox A S E 7 al E

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