Emerson Process Management MMI-20015440 инструкция обслуживания

Inst allation and Configuration Manual P/N MMI-20015440, Rev . AA July 2009 Micro Motion ® 7827 Digit al V iscosity Meter Short and Long S tem V ersions[...]

©2009, Micro Motion, Inc . All rights reserved. Micro Motion is a re gistered trade name o f Micro Motion, I nc., Boulder , Colorado . The Micro Motion and Emerson log os are trademarks and service mar ks of Emerson Electric Co. All other trademarks are property of their respective owners. Micro Motion pursues a pol icy of continuous developmen t [...]

Installation and Conf iguration Manual i Contents Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 Safety guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 About the m eter . . . . . . . . . . . . . . . . . . . . . [...]

ii Micro Motion 7827 Digital Viscosi ty Meter Contents 4.7 Checking the installat ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Chapter 5 Using 7950/7951 Processing Electronic s . . . . . . . . . . . . . . . . . . . . 39 5.1 Using the 79 50 / 7951 Pr ocessing Elect ronics . . . . . . . . . . . . [...]

Installation and Conf iguration Manual iii Contents Appendix C Product Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 C .1 Density / temperature re lationship of hydrocarbon p roducts . . . . . . . . . . . . . . . . . . . 61 C .1.1 Crude oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

iv Micro Motion 7827 Digital Viscosi ty Meter Contents[...]

Installation and Conf iguration Manual 1 Installation (Short Stem) Electrical Connecti ons Installation (Long Stem) Intro duction Chapter 1 Introduction 1.1 Safety guidelines Handle the 7827 digital viscosity meter wit h great care. • Do not drop the meter . • Do not use liquids incompatible with mater ials of const ruction. • Do not operate [...]

2 Micro Motion 7827 Digital Viscosi ty Meter Introduction 1.2 About the meter 1.2.1 What is it? The 7827 meter is a digital visco sity meter , based on the prov en tuning fork technology of Micro Motion. It is an all-welded sensor designed to be mounted directly into a pipeline or i n a tank. V iscosity and density are determined from the resonanc [...]

Installation and Conf iguration Manual 3 Introduction Installation (Short Stem) Electrical Connecti ons Installation (Long Stem) Intro duction 1.2.3 What is it used for? The 7827 meter is idea lly suited to applications where continuous real time m easurement o f viscosity is required. The meter is particularly suited wh ere viscosity is an indicat[...]

4 Micro Motion 7827 Digital Viscosi ty Meter Introduction[...]

Installation and Conf iguration Manual 5 Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction Chapter 2 Installation (Short Stem) For information on i nstalling a long-stem version of the 7827 digital viscosity meter, see Chapter 3. 2.1 Introduction There are a v ariety of external f actors that af fect the abili[...]

6 Micro Motion 7827 Digital Viscosi ty Meter Installation (Short Stem ) Factors which may adv ersely affect the rele vance of the measurements could include: • Measurement used for control purposes being made too far away from the point of control, so that the system cannot respond properly to chang es. • Measurements made on fluid which is unr[...]

Installation and Conf iguration Manual 7 Installation (Short Stem ) Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction This next vie w shows other pipe outlines superimposed: The smaller circle represents a 4" (100 mm) v ertical pipe, which because the 7827 meter orientatio n is constant irrespectiv e of p[...]

8 Micro Motion 7827 Digital Viscosi ty Meter Installation (Short Stem ) From this, it would appear that almost e very installa tion requires a separate in situ calibration – a very undesirable situation. Th e problem is resolv ed by pro viding standard ca li bration geometries which can be used in all pipe work co nfigurations and thereby allo w [...]

Installation and Conf iguration Manual 9 Installation (Short Stem ) Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction 2.3.2 Meter orientatio n The meter must alwa ys be installe d horizontally , and orientated to allo w flow in the gap between the tines. This is irrespecti ve of the pipe line orientatio n, an [...]

10 Micro Motion 7827 Digital Viscosi ty Meter Installation (Short Stem ) Figure 2-1 Meter orientation Note: All dr awings and dimensions given in t h e following sections ar e derived fr om detailed dimensional drawings. They ar e given he r e for pla nning purposes on ly . Befor e com mencing fabrication, r eference should alwa ys be made to the c[...]

Installation and Conf iguration Manual 11 Installation (Short Stem ) Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction The pock et geometry must be consistent with 2" schedule 40 tu be in both internal diameter and minimum wall thickness, such as: • Internal diameter: 2" (52. 5 mm) • W all thickn[...]

12 Micro Motion 7827 Digital Viscosi ty Meter Installation (Short Stem ) Figure 2-2 Fr ee stream 1.5 " Swagelock fitting The installation will conform generally to Schedule 40 pressure ratings . The weldolet f abrication is rated to 100 Bar at ambient temperature. Note: Corr ect installation and pr essur e testing of the f itting is the r espo[...]

Installation and Conf iguration Manual 13 Installation (Short Stem ) Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction The pock et geometry must be consistent with 2" schedule 40 tu be in both internal diameter and minimum wall thickness, i.e.: • Internal diameter: 2.1" (52 .5 mm) • W all thickne[...]

14 Micro Motion 7827 Digital Viscosi ty Meter Installation (Short Stem ) The three compression f ittings on the flo w pockets (½" drain, ¾" temp probe, and 1-½" mounting nut for the meter) are rated to abo ve the w orking pre ssure of the flo w pocket. The f ittings may be Swagelok or P arker; both are used in manuf acture. The fi[...]

Installation and Conf iguration Manual 15 Installation (Short Stem ) Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction Y ou must first select a location which serv es the app lication objecti ve; e.g. inst alled close to the point of control. Then, consideration can be gi ven to flui d conditioning at that poi[...]

16 Micro Motion 7827 Digital Viscosi ty Meter Installation (Short Stem ) Where it is necessary to install the viscometer in a by-pass (either using the fr ee stream installation in a 4" diameter horizon tal by-pass, or a flow-through chamber), flow may be maintained using pressure drop, pitot scoop, or by a sample pump. Where a pu mp is u sed,[...]

Installation and Conf iguration Manual 17 Installation (Short Stem ) Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction 2.5 T ypical installations The follo wing diagrams illustrate some typical solu tions for line viscosity me asurement, simple base viscosity referral a nd base viscosity using temperature cont[...]

18 Micro Motion 7827 Digital Viscosi ty Meter Installation (Short Stem ) Figure 2-3 Jacketed pipeline installation Alternati vely , the viscometer can be installed in a by-pass. By ensuring that the sample is mixed where the by-pass draws of f the main pipeline, it is not necessary to discontin ue the main pipe line jacket. This is sho wn belo w . [...]

Installation and Conf iguration Manual 19 Installation (Short Stem ) Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction 2.5.2 Flow-through ch amber The diagram belo w shows the use of a flo w-through chamber . This provides a compact installation and is particularly suited to flo ws of contaminated fluids, sinc[...]

20 Micro Motion 7827 Digital Viscosi ty Meter Installation (Short Stem )[...]

Installation and Conf iguration Manual 21 Installation (Short Stem) Electrical Connecti ons Installation (Long Stem) Intro duction Chapter 3 Installation (Long Stem) For information on i nstalling a short-stem version of the 7827 di gital viscos ity meter, see Chapter 2. 3.1 Introduction There are a v ariety of external f actors that af fect the ab[...]

22 Micro Motion 7827 Digital Viscosi ty Meter Installation (Long Stem ) The term achiev able accuracy can be used to describe a measure of the product quality that can be realistically obtained from a proc ess system. It is a function of measurement accuracy , stability and system response. High accuracy alone is no guarantee of good product qualit[...]

Installation and Conf iguration Manual 23 Installation (Long Stem ) Installation (Short Stem) Electrical Connecti ons Installation (Long Stem) Intro duction 3.2.3 Entrained ga s Gas pock ets can disrup t the measuremen t. A brief disruption i n the signal caused by transient gas pockets can be ne gated in the int ernal signal condition ing software[...]

24 Micro Motion 7827 Digital Viscosi ty Meter Installation (Long Stem ) Figure 3-2 Keep ing tines away from the tank wall (Open-tank) 3. K e ep the tines immersed in fluid (see Figure 3-3). Figure 3-3 Keeping tines immersed (Open-tank ) 4. K e ep tines aw ay from objects and disturbed flo w (see Figure 3-4).[...]

Installation and Conf iguration Manual 25 Installation (Long Stem ) Installation (Short Stem) Electrical Connecti ons Installation (Long Stem) Intro duction Figure 3-4 Keep ing tines away from objects and disturbed flow (open tan k) 5. If there is flo w , align the tines such that the fl o w is directed to wards the gap between the tines (see Figur[...]

26 Micro Motion 7827 Digital Viscosi ty Meter Installation (Long Stem ) Figure 3-6 A v oid deposit build-up (Open-tank ) 3.4 Closed-tank installation 1. F or closed-tank installations, the long-stemmed 7827 meter should ha ve a f actory fitted flange attachment. (This is an option that is specif ied as a code in the part nu mber – see a list of t[...]

Installation and Conf iguration Manual 27 Installation (Long Stem ) Installation (Short Stem) Electrical Connecti ons Installation (Long Stem) Intro duction Figure 3-8 Use of standoff section ( not supplied)(closed-tank) 3. K e ep the tines immersed in fluid (see Figure 3-9). Figure 3-9 Keeping tines immers ed (closed tank) 4. K e ep the tines a wa[...]

28 Micro Motion 7827 Digital Viscosi ty Meter Installation (Long Stem ) Figure 3-11 Allowing for tank lid flexing (closed tank) 6. K e ep tines aw ay from objects and disturbed flo w (see Figure 3-12). Figure 3-12 Keeping tines away from ob jects and disturbed flow (Close d-tank) 7. If there is flo w , align the tines such that the fl o w is direct[...]

Installation and Conf iguration Manual 29 Installation (Long Stem ) Installation (Short Stem) Electrical Connecti ons Installation (Long Stem) Intro duction Figure 3-13 Aligning the tines in flow (closed tank) 8. K eep away from deposit b uild-up (see Figure 3-14). Figure 3-14 Avoid deposit build-up (closed tank) 3.5 Calibration The log-stemmed 782[...]

30 Micro Motion 7827 Digital Viscosi ty Meter Installation (Long Stem ) 5. Once the system has stabilized and is leak fre e, fit the insulation material, remembering also to insulate any flanges.[...]

Installation and Conf iguration Manual 31 Electrical Connectio ns Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intr oduction Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intr oduction Installation (Sho[...]

32 Micro Motion 7827 Digital Viscosi ty Meter Electrical Connectio ns 4.3 Installation and safety in hazardous areas The 7827 meter is e xplosi ve proof and can be in stalled in a hazardous area without the use of intrinsically safe barriers (or isolators). Ho wev e r , it is still necessary to observe the rules of compliance with current standards[...]

Installation and Conf iguration Manual 33 Electrical Connectio ns Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intr oduction Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intr oduction Installation (Sho[...]

34 Micro Motion 7827 Digital Viscosi ty Meter Electrical Connectio ns 4.6 Connecting the 78 27 to a 795x series com puter 4.6.1 Over view The 7827 requires a 79 5x series computer (Signal Con verter or Flo w Computer) with liquid-based application software for it to be functional. This section provides a guide to possible wiring connections between[...]

Installation and Conf iguration Manual 35 Electrical Connectio ns Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intr oduction Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intr oduction Installation (Sho[...]

36 Micro Motion 7827 Digital Viscosi ty Meter Electrical Connectio ns Figure 4-2 Conn ecting two 7827 meters to a 7950 Flow comp uter S ign al - PR T S ign al - PR T S ign al + PR T P ow e r + PR T P ow e r - 0V Su pp ly Si gn al + +2 4 V P o we r Su p p ly + Sig + Sup p ly - K lip p o n PL 13 / 8 7827 I n t eg r a t e d P T 1 0 0 PL 13 / 7 PL 13 /[...]

Installation and Conf iguration Manual 37 Electrical Connectio ns Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intro duction Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intr oduction Installation (Short Ste m) Electrical Connections Installation (Long Stem) Intr oduction Installation (Sho[...]

38 Micro Motion 7827 Digital Viscosi ty Meter Electrical Connectio ns Electrical checks Measure the current consumption an d the supply voltage at the meter ampl ifier . They should be within the follo wing limits: • Current: 40 mA to 70 mA (Measured in series at the “ SUPPL Y + ” terminal) • V oltage: 22.8 V to 25.2 V (Measured between” [...]

Installation and Conf iguration Manual 39 Calibration Check General Maintenance Using 795X Processing Electronics Chapter 5 Using 7950/7951 Processing Electronics 5.1 Using the 7950 / 7951 Processing Electronics For details on connect ing the 7827 meter to the Mi cro Motion signal con verters and flo w computers, refer to the appropriate 795x op er[...]

40 Micro Motion 7827 Digital Viscosi ty Meter Using 7950/7951 Pro cessing Electronics[...]

Installation and Conf iguration Manual 41 Calibration Chec k General Mai ntenance Using 795X Processing Electronics Chapter 6 Calibration Check 6.1 Introduction The follo wing information details the calibration method and perfo rmance of the 7827 digital viscosity meter and co vers the follo wing: • Factory calibrat ion • In-line calibration ?[...]

42 Micro Motion 7827 Digital Viscosi ty Meter Calibration Check A fourth fluid is used as an o vercheck to v erify th e calibration for each viscosity range. Each check is monitored by the Micro Motion Quality Assurance Department. 6.2.2 Density The 7827 meter is cal ibrated with in the standard shroud against T ransfer Standard instruments traceab[...]

Installation and Conf iguration Manual 43 Calibration Check Calibration Chec k General Mai ntenance Using 795X Processing Electronics 6.3 In-line calibration 6.3.1 Viscosity The 7827 meter is calibrated to op erate in installations where the boundary formed by the surrounding metalwork is at a distance a way where it does not influence the viscosit[...]

44 Micro Motion 7827 Digital Viscosi ty Meter Calibration Check For unstable or high-pres sure vapor liquids A pressure pykn ometer can be used. The pressure pyknometer and its asso ciated pipe work can be coupled to the pipeline so that a sa mple of the product flows through it. When equilibrium is reached, the meter density reading is note d as t[...]

Installation and Conf iguration Manual 45 Calibration Check Calibration Chec k General Mai ntenance Using 795X Processing Electronics Figure 6-1 Density in-line calibration procedure Note: The values of K0' and K2' ar e now used in the general density equation in the 795x, r eplacing the original values of K0 and K2 on the calibr ation ce[...]

46 Micro Motion 7827 Digital Viscosi ty Meter Calibration Check V iscosity calibration is ef fectiv ely immune to temp erature or pressure errors when operating with Ne wtonian fluids. As a general guide, T able 6-1 sho ws the accuracy of the 7827 meter: 6.4.2 Density The 7827 meter is cal ibrated for density at 20°C a nd at at mospheric pressure [...]

Installation and Conf iguration Manual 47 Calibration Check Calibration Chec k General Mai ntenance Using 795X Processing Electronics Figure 6-2 Example calibration certificate f or the 7827 digital viscosity meter example example CALIBRATION CERTIFICATE 7827CBANATEABA VISCOMETER SERIAL NO : 27 1542 CAL DATE : 24 JUL08 PRESSURE TEST : 16 0 Bar VISC[...]

48 Micro Motion 7827 Digital Viscosi ty Meter Calibration Check[...]

Installation and Conf iguration Manual 49 Calibration Chec k General Mai ntenance Using 795X Processing Electronics Chapter 7 General Maintenance 7.1 Introduction This chapter describes which proced ures to take in the ev ent of a fault dev eloping with the 7827 digital viscosity meter system. T o use this chapter ef fecti vely , follo w the option[...]

50 Micro Motion 7827 Digital Viscosi ty Meter General Maintenance 6. Check that the Signal Con verter is providing ad equate po wer to the mete r and that the Sign al Con verter itself is functioning properly . Check calibrations shoul d be carried out at specif ied intervals in order to highlight a malfunction or deterioration in meter performance[...]

Installation and Conf iguration Manual 51 General Maintenance Calibration Chec k General Mai ntenance Using 795X Processing Electronics Error on indica ted density If the indicated density is in error , follow the tabl e belo w and, if necessary , refer to the other tables later in the chapter to f ind the cause of the fault. Ta b l e 7 - 1 Error c[...]

52 Micro Motion 7827 Digital Viscosi ty Meter General Maintenance 7.3.2 Checking the power consumptio n A lot of information is gained fro m ch ecking the po wer consumption at vario us parts of the circuit between Signal Con verter and meter . Ta b l e 7 - 2 Error check ing for density What to c heck: What to look f or: What to c heck ne xt: Indic[...]

Installation and Conf iguration Manual 53 General Maintenance Calibration Chec k General Mai ntenance Using 795X Processing Electronics 7.3.3 Checking the ins tallation The last check to be made is a physical check of the meter's installatio n and wetted parts. This means taking the 7827 meter out of the installation an d inspecting the tines [...]

54 Micro Motion 7827 Digital Viscosi ty Meter General Maintenance Installation dimensions Check the ke y dimensions as specified in Chapter 2 f or your inst allation. • Y our ke y dimen sions should match those detailed in the Installation chapter f or your meter f or your mounting configuration. Product build up on the tines Product which has st[...]

Installation and Conf iguration Manual 55 Safety Certification Return Policy Product Data Calculated Parameters Appendix A Calculated Parameters A.1 Introduction The follo wing information details the equations used in the Micro Motion ® si gnal con verters to translate the raw data from the meter into fl uid parameters and cov ers the following: [...]

56 Micro Motion 7827 Digital Viscosi ty Meter Calculated Paramete rs A.2.2 General viscosity equation The quality fa ctor of a resonator is proportional to t he in verse square root of viscosity . T o calibrate the resonator against flui d viscosity , the following quadratic e xpression is used: η = V * ( V0 + V1.*X + V2*X 2 ) [2] Where: • η = [...]

Installation and Conf iguration Manual 57 Calculated Paramete rs Safety Certification Return Policy Product Data Calculated Parameters ρ v = ρ t - [ K20 + K21*X + K22*X 2 ] [5] where: • ρ v = V iscosity-correcte d density (kg/m 3 ) • ρ t = T emperature-corrected density (kg/m 3 ) •X = 1 / Q 2 (in verse square of the quality factor) • K2[...]

58 Micro Motion 7827 Digital Viscosi ty Meter Calculated Paramete rs Figure A-1 The Velocity Of S ound (V OS) / density relationship A.3.6 Density scaling Once the indicated density has been corrected for te mperature, viscosity and V OS, the result is scaled to display density in any set of units . The follo wing expressi on is used: ρ = ρ vos *[...]

Installation and Conf iguration Manual 59 Safety Cer tification Safety Certification Return Policy Product Data Calculated Parameters Appendix B Safety Certification B.1 Safety certification Please contact Micro Motion if you need to ha ve copies of the latest safety certif ication for the 7827 digital viscosity meter.[...]

60 Micro Motion 7827 Digital Viscosi ty Meter Safety Cer tification[...]

Installation and Conf iguration Manual 61 Safety Certification Return Policy Product Data Calculated Parameters Appendix C Product Data C.1 Density / temperature rel ationship of hydrocarbon p roducts C.1.1 Crude oil C.1.2 Refined products Ta b l e C - 1 Crude oil T emp. (°C) Density (kg/m 3 ) 60 738.91 765.06 791.94 8 17.15 843.11 86 9.01 894.86 [...]

62 Micro Motion 7827 Digital Viscosi ty Meter Product Data The abov e tables are deri ved from equations, which form the basis of the data in the Revised P etr oleum Measur ement T ables (IP 200, ASTM D1250 , API 2540 and ISO R91 Addendum 1). The density tempera ture relationship used is: Where: = Density at line temper ature t°C (kg/m 3 ) = Densi[...]

Installation and Conf iguration Manual 63 Product Data Safety Certification Return Policy Product Data Calculated Parameters C.1.4 Density of ambient air T aken at a relati ve humidity of 50%. C.1.5 Density of water Use pure, bubble-free water . Ta b l e C - 4 Density of ambient air (in kg/m 3 ) Air Pressure Air T emperature (°C) ( m b ) 6 1 01 41[...]

64 Micro Motion 7827 Digital Viscosi ty Meter Product Data C.1.6 Velocity of sound in liquids Ta b l e C - 6 Velocity of sound in liquids Liquid T emp. (t °C) V elocity of Sound (m s –1 ) Rate of Change ( m s –1 K –1 ) Acetic acid 20 1173 ---- Acetone 20 1190 –4.5 Amyl acetate 29 1173 ---- Aniline 20 1656 –4.0 Benzene 20 1320 –5.0 Bloo[...]

Installation and Conf iguration Manual 65 Product Data Safety Certification Return Policy Product Data Calculated Parameters n-P entane 20 1044 –4.2 n-Prop yl acetate 26 1182 ---- T oluene 20 1320 –4.3 T urpentine 25 1225 ---- W ater (distill ed) 10 1447.2 ---- 20 1482.3 ---- 30 1509.1 ---- 50 1542.5 ---- 70 1554.8 ---- W ater (sea) –4 1430.2[...]

66 Micro Motion 7827 Digital Viscosi ty Meter Product Data[...]

Installation and Conf iguration Manual 67 Safety Certification Return Policy Product Data Calculated Parameters Appendix D Return Policy D.1 General guidelines Micro Motion pro cedures must be followed when returning equipment. These proced ures ensure legal compliance with gov ernment transportation agencies and help pro vide a safe working en vir[...]

68 Micro Motion 7827 Digital Viscosi ty Meter Return Policy[...]

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Micro Motion USA Worldwide Headquarters 7070 Winchester Circle Boulder , CO 80301 T +1 303-527-5200 +1 303-522-6277 F +1 303-530-8459 Micro Motion Slough Emerson Process Management 158 Edinburgh Avenue Slough, Berks, UK SL1 4UE T +44 1753 756600 F +44 1753 823589 Micro Motion Asia Emerson Process Management 1 Pandan Crescent Singapore 128461 Republ[...]