Installation and Configuration Manual P/N MMI-20015440, Rev.
©2009, Micro Motion, Inc. All rights reserved. Micro Motion is a registered trade name of Micro Motion, Inc., Boulder, Colorado. The Micro Motion and Emerson logos are trademarks and service marks of Emerson Electric Co. All other trademarks are property of their respective owners. Micro Motion pursues a policy of continuous development and product improvement. The specification in this document may therefore be changed without notice.
Contents Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 1.2 1.3 Chapter 2 2.4 2.5 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Boundary effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Standard installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents 4.7 Chapter 5 Using 7950/7951 Processing Electronics . . . . . . . . . . . . . . . . . . . . 39 5.1 Chapter 6 Using the 7950 / 7951 Processing Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Calibration Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 6.1 6.2 6.3 6.4 6.5 Chapter 7 Checking the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Introduction . . . . . . . . . .
Contents Appendix C Product Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 C.1 Density / temperature relationship of hydrocarbon products. . . . . . . . . . . . . . . . . . . C.1.1 Crude oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C.1.2 Refined products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C.1.3 Platinum resistance law . . . . . . . . . . . . . . . . . . . . . .
Contents iv Micro Motion 7827 Digital Viscosity Meter
1.1 Introduction Chapter 1 Introduction Safety guidelines Handle the 7827 digital viscosity meter with great care. Do not drop the meter. • Do not use liquids incompatible with materials of construction. • Do not operate the meter above its rated pressure or maximum temperature. • Do not pressure test beyond the specified test pressure. • Ensure all explosion-proof requirements have been applied.
Introduction 1.2 About the meter 1.2.1 What is it? The 7827 meter is a digital viscosity meter, based on the proven tuning fork technology of Micro Motion. It is an all-welded sensor designed to be mounted directly into a pipeline or in a tank. Viscosity and density are determined from the resonance of the tuning fork immersed in the fluid, and a temperature sensor (PRT) is also fitted within the meter.
Introduction 1.2.3 What is it used for? Some uses are in the oil and petrochemical industry for: 1.3 • Refining • Marine • Power • Heavy fuel oil (HFO) blending and bunkering Introduction The 7827 meter is ideally suited to applications where continuous real time measurement of viscosity is required. The meter is particularly suited where viscosity is an indication of the behavioral properties of the fluid, for example in applications involving spraying, coating or dipping.
Introduction 4 Micro Motion 7827 Digital Viscosity Meter
Introduction Chapter 2 Installation (Short Stem) For information on installing a long-stem version of the 7827 digital viscosity meter, see Chapter 3. 2.1 Introduction Installation (Short Stem) All drawings and dimensions given in this manual are given here for planning purposes only. Before commencing fabrication, reference should always be made to the current issue of the appropriate drawings. Contact Micro Motion for details.
Installation (Short Stem) Factors which may adversely affect the relevance of the measurements could include: 2.2 • Measurement used for control purposes being made too far away from the point of control, so that the system cannot respond properly to changes. • Measurements made on fluid which is unrepresentative of the main flow. Boundary effects Any insertion device or meter can only measure the properties of the fluid within the region of fluid to which it is sensitive.
Installation (Short Stem) Introduction 2”Schedule 40 Pocket or “T” 4” horizontal pipe Installation (Short Stem) Top or Plan view This next view shows other pipe outlines superimposed: Installation and Configuration Manual 7 Electrical Connections An alternative condition is shown in the next diagram where the side pocket is extended until it passes completely through the effective region producing a “core”: Installation (Long Stem) The smaller circle represents a 4" (100 mm) vertical pipe, which
Installation (Short Stem) From this, it would appear that almost every installation requires a separate in situ calibration – a very undesirable situation. The problem is resolved by providing standard calibration geometries which can be used in all pipe work configurations and thereby allow the factory calibration conditions to be reproduced in the process. 2.3 Standard installations 2.3.
Installation (Short Stem) Table 2-1. Types of standard installations continued T-piece Flow-through chamber Main flow pipe size 100 mm (4") horizontal 150 mm (6") vertical, or larger. 100 mm (4") horizontal or larger. Any. Advantages • Simple installation in large bore pipes. • Ideal for clean fluids and non-waxing oils. • Suitable for line viscosity measurement and simple referrals. • Simple installation in large bore pipes. • Ideal for clean fluids and non-waxing oils.
Installation (Short Stem) Figure 2-1 Meter orientation For ALL pipe and flow directions . . Bubbles rise! the slot must be vertical Solids sink! the meter must be horizontal Note: All drawings and dimensions given in the following sections are derived from detailed dimensional drawings. They are given here for planning purposes only. Before commencing fabrication, reference should always be made to the current issue of the appropriate drawings contact Micro Motion for details. 2.3.
Installation (Short Stem) Introduction 4” or larger; horizontal 6” or larger; vertical 2.75” (70 mm ±2 mm) 7.75” (197 mm) circlip PFA PTFE ring 4.37” (111 mm) 2” (52.3 mm) Installation (Short Stem) wall thickness at least 0.15” (3.912 mm) 0.47” (12 mm) 2” Schedule 40 Free Stream; flanged The pocket geometry must be consistent with 2" schedule 40 tube in both internal diameter and minimum wall thickness, such as: • Internal diameter: 2" (52.5 mm) • Wall thickness: minimum 0.15" (3.912 mm) 2.3.
Installation (Short Stem) Figure 2-2 Free stream 1.5" Swagelock fitting Horizontal: 4” or larger Vertical: 6” or larger Weld 4.4” (111 mm) 2.1” (52.5 mm) min Free stream weldolet to suit pipe diameter (4, 6, 8 or 10” N.B.) 10” (254 mm) The installation will conform generally to Schedule 40 pressure ratings. The weldolet fabrication is rated to 100 Bar at ambient temperature. Note: Correct installation and pressure testing of the fitting is the responsibility of the user. 2.3.
Installation (Short Stem) D 6.9” (175 mm ±2 mm) Introduction 4” or larger; horizontal or vertical 7.75” (197 mm) PFA ring circlip 4.37” (111 mm) 2” (52.3 mm) Installation (Short Stem) wall thickness at least 0.15” (3.912 mm) 0.47” (12 mm) 2” Schedule 40 “T” piece Flanged The pocket geometry must be consistent with 2" schedule 40 tube in both internal diameter and minimum wall thickness, i.e.: • Internal diameter: 2.1" (52.5 mm) • Wall thickness : minimum 0.15" (3.912 mm) 2.3.
Installation (Short Stem) Dimensions shown in inches (mm) The three compression fittings on the flow pockets (½" drain, ¾" temp probe, and 1-½" mounting nut for the meter) are rated to above the working pressure of the flow pocket. The fittings may be Swagelok or Parker; both are used in manufacture. The fittings are certified to the following standards: 2.
Installation (Short Stem) The choice of mechanical installation (free stream, “T” piece or flow-through chamber) will be dictated partly by application needs and partly by the fluid conditions, such as: • Condition of fluid at the sensor • Thermal effects • Flow rate • Entrained gas • Solids contamination The fluid in the effective zone of the 7827 meter must be of uniform composition and at uniform temperature. It must be representative of the fluid flow as a whole.
Installation (Short Stem) Where it is necessary to install the viscometer in a by-pass (either using the free stream installation in a 4" diameter horizontal by-pass, or a flow-through chamber), flow may be maintained using pressure drop, pitot scoop, or by a sample pump. Where a pump is used, the pump should be upstream of the viscometer. Entrained gas Gas pockets can disrupt the measurement.
Installation (Short Stem) Introduction Installation (Short Stem) 2.5 Typical installations The following diagrams illustrate some typical solutions for line viscosity measurement, simple base viscosity referral and base viscosity using temperature control of the sample flow. In all examples, the fluid flow is assumed to be uniform in composition and temperature as it enters the viscometer section. Jacketed pipeline The diagram below shows a jacketed pipeline.
Installation (Short Stem) Figure 2-3 Jacketed pipeline installation Alternatively, the viscometer can be installed in a by-pass. By ensuring that the sample is mixed where the by-pass draws off the main pipeline, it is not necessary to discontinue the main pipe line jacket. This is shown below.
Installation (Short Stem) 2.5.2 Flow-through chamber Figure 2-5 Introduction The diagram below shows the use of a flow-through chamber. This provides a compact installation and is particularly suited to flows of contaminated fluids, since the design of the chamber encourages self cleaning. Because the volume flow rate is low, the heat flow is low and therefore the insulation must be as efficient as possible.
Installation (Short Stem) 20 Micro Motion 7827 Digital Viscosity Meter
Introduction Chapter 3 Installation (Long Stem) For information on installing a short-stem version of the 7827 digital viscosity meter, see Chapter 2. 3.1 Introduction To protect the tines from damage, a Transit Cover is fitted prior to shipment from the factory. The Transit Cover is held in place by 2 grub screws. Be sure to remove and store the Transit Cover prior to installation. Re-fit the Transit Cover if storing or transporting, such as for repair.
Installation (Long Stem) The term achievable accuracy can be used to describe a measure of the product quality that can be realistically obtained from a process system. It is a function of measurement accuracy, stability and system response. High accuracy alone is no guarantee of good product quality if the response time of the system is measured in tens of minutes, or if the measurement bears little relevance to the operation of the system.
Installation (Long Stem) 3.2.3 Entrained gas • Vent any gas prior to the viscosity meter. • Avoid sudden pressure drops or temperature changes which may cause dissolved gases to break out of the fluid. 3.2.4 Solids contamination • Avoid sudden changes of velocity that may cause sedimentation. • Install the meter far enough away from any build-up of solids. • Maintain flow velocity at the sensor within the specified limits.
Installation (Long Stem) Figure 3-2 Keeping tines away from the tank wall (Open-tank) 3. Keep the tines immersed in fluid (see Figure 3-3). Figure 3-3 Keeping tines immersed (Open-tank) 4. Keep tines away from objects and disturbed flow (see Figure 3-4).
Installation (Long Stem) Figure 3-4 Keeping tines away from objects and disturbed flow (open tank) Introduction Installation (Short Stem) Figure 3-5 Aligning the tines in flow (Open-tank) Electrical Connections 6. Keep away from deposit build-up (see Figure 3-6). Installation and Configuration Manual Installation (Long Stem) 5. If there is flow, align the tines such that the flow is directed towards the gap between the tines (see Figure 3-5).
Installation (Long Stem) Figure 3-6 3.4 Avoid deposit build-up (Open-tank) Closed-tank installation 1. For closed-tank installations, the long-stemmed 7827 meter should have a factory fitted flange attachment. (This is an option that is specified as a code in the part number – see a list of the product options in the product data sheet available at www.micromotion.com.) (See Figure 3-7). Figure 3-7 Closed-tank installation 2.
Installation (Long Stem) Figure 3-8 Use of standoff section (not supplied)(closed-tank) Introduction Installation (Short Stem) 3. Keep the tines immersed in fluid (see Figure 3-9). Figure 3-9 Keeping tines immersed (closed tank) Installation (Long Stem) 4. Keep the tines away from the tank wall (see Figure 3-10). Figure 3-10 Keeping away from tank wall (closed tank) Installation and Configuration Manual 27 Electrical Connections 5.
Installation (Long Stem) Figure 3-11 Allowing for tank lid flexing (closed tank) 6. Keep tines away from objects and disturbed flow (see Figure 3-12). Figure 3-12 Keeping tines away from objects and disturbed flow (Closed-tank) 7.
Installation (Long Stem) Figure 3-13 Aligning the tines in flow (closed tank) Introduction Installation (Short Stem) 8. Keep away from deposit build-up (see Figure 3-14). Figure 3-14 Avoid deposit build-up (closed tank) Installation (Long Stem) 3.5 Calibration The log-stemmed 7827 meter is factory calibrated and no further calibration is necessary. The calibration is traceable to UK National Standards through the Micro Motion UKAS-approved laboratory.
Installation (Long Stem) 5. Once the system has stabilized and is leak free, fit the insulation material, remembering also to insulate any flanges.
Electrical Connections Introduction Chapter 4 Electrical Connections For installations in hazardous areas: For ATEX installations, the electrical installation must strictly adhere to the safety information given in the ATEX safety instructions booklet shipped with this manual. See Section 1.1 for important information. • For installations in USA and Canada, the electrical installation must strictly adhere to the Electrical Codes and a conduit seal is required within 2” (50 mm) of the enclosure.
Electrical Connections 4.3 Installation and safety in hazardous areas For installations in hazardous areas: • For ATEX installations, the electrical installation must strictly adhere to the safety information given in the ATEX safety instructions booklet shipped with this manual. See Section 1.1 for important information. • For installations in USA and Canada, the electrical installation must strictly adhere to the Electrical Codes and a conduit seal is required within 2” (50 mm) of the enclosure.
Electrical Connections 1 /2" N PT HOLE 1/2" NPT SUPP LY S IG + + H OLE P RT Introduction 2. The meter is normally mounted horizontally such that the 1/2” NPT holes are on a vertical plane. This minimizes water ingress. Identify the 1/2" NPT hole which is lowest and attach the multi-core cable to it. 1/2" NPT PLUG Exd IIC 1/2" TO M20 x 1 AD APTOR Exd IIC M20 x 1 CABLE GLAND Exd II C 200 mm OF UN SCREEN ED WIR E TB3 SU PPL Y SIG + + 4. Fix the 1/2" NPT plug to the un-used hole.
Electrical Connections 7. Screw the housing cap on fully and tighten the locking grub screw using the 2.5 mm AF hex drive. VIEW FROM UNDERNEATH THE ELECTRONICS: TIGHTEN CAP TIGHTEN GRUB 4.6 Connecting the 7827 to a 795x series computer 4.6.1 Overview The 7827 requires a 795x series computer (Signal Converter or Flow Computer) with liquid-based application software for it to be functional. This section provides a guide to possible wiring connections between the 7827 and the 795x.
Electrical Connections Flow Computer Figure 4-2 2 7951 Signal Converter Figure 4-1 1 7951 Flow Computer Figure 4-3 2 4.6.
Electrical Connections Figure 4-2 Connecting two 7827 meters to a 7950 Flow computer 7827 7950 Klippon Supply + Sig + Supply - +24V Power Signal + PL10/4 Signal PRT Power + PRT Signal + PRT Viscosity 'A' using Density input #3 pins on the 7950 PL10/2 0V Supply Integrated PT100 PL10/ PRT Signal PRT Power - PL10/3 PRT Input #3 pins on the 7950 PL13/ PL13/2 PL13/3 PL13/4 7827 Klippon Supply + Sig + Supply Integrated PT100 +24V Power Signal + PL10/6 0V Supply PL10/8 Signal PRT Power + PRT
Electrical Connections Figure 4-3 Connecting two 7827 meters to a 7951 Flow computer 7951 Klippon Supply + Sig + Supply - +24V Power Signal + 0V Supply Signal - Integrated PT100 PRT Power + PRT Signal + PRT Signal PRT Power - D-type PL5/9 SK6/ 22 PL5/5 SK6/ 18 PL5/10 SK6/ 24 PL5/6 SK6/ 19 PL8/1 SK8/ 1 PL8/2 SK8/ 2 PL8/3 SK8/ 3 PL8/4 SK8/ 4 Viscosity 'A' using Density input #3 pins on the 7951 PRT Input #3 pins on the 7951 Installation (Short Stem) PRT Introduction 7827 7827 K
Electrical Connections Electrical checks Measure the current consumption and the supply voltage at the meter amplifier. They should be within the following limits: • Current: 40 mA to 70 mA (Measured in series at the “SUPPLY +” terminal) • Voltage: 22.8 V to 25.2 V (Measured between” SUPPLY +” and “SUPPLY -” terminals) Functionality checks 1. When the meter is powered up, a small audible continuous ringing sound can be heard with a “Ping” occurring at 1 second intervals. 2.
Using 795X Processing Electronics Chapter 5 Using 7950/7951 Processing Electronics 5.1 Using the 7950 / 7951 Processing Electronics For details on connecting the 7827 meter to the Micro Motion signal converters and flow computers, refer to the appropriate 795x operating manual.
Using 7950/7951 Processing Electronics 40 Micro Motion 7827 Digital Viscosity Meter
Using 795X Processing Electronics Chapter 6 Calibration Check 6.1 Introduction The following information details the calibration method and performance of the 7827 digital viscosity meter and covers the following: Factory calibration • In-line calibration • Performance Calibration Check 6.2 • Factory calibration 6.2.1 Viscosity The 7827 meter is calibrated against fluids characterized with prime standards, prior to leaving the factory.
Calibration Check A fourth fluid is used as an overcheck to verify the calibration for each viscosity range. Each check is monitored by the Micro Motion Quality Assurance Department. 6.2.2 Density The 7827 meter is calibrated within the standard shroud against Transfer Standard instruments traceable to National Standards, prior to leaving the factory. Three fluids ranging in density from 1 to 1000 kg/m3 are used to establish the general density equation constants.
Calibration Check In-line calibration 6.3.1 Viscosity The 7827 meter is calibrated to operate in installations where the boundary formed by the surrounding metalwork is at a distance away where it does not influence the viscosity reading from the meter. If the installation is such that an error in viscosity is seen due to the proximity of the metalwork to the tines, an in-line calibration is needed to correct for this source of error. Using 795X Processing Electronics 6.
Calibration Check For unstable or high-pressure vapor liquids A pressure pyknometer can be used. The pressure pyknometer and its associated pipework can be coupled to the pipeline so that a sample of the product flows through it. When equilibrium is reached, the meter density reading is noted as the pyknometer is isolated from the sample flow. The pyknometer is removed for weighing to establish the product density. This density result is now compared with the reading from the meter.
Calibration Check Using 795X Processing Electronics Figure 6-1 Density in-line calibration procedure START IS VOS REQUIRED? NO D'L = DL YES VOS CORRECTION METHOD GRAPHICAL OR ANALYTICAL SOLUTION? GRAPHICAL Calibration Check ANALYTICAL DETERMINE DENSITY OFFSET dDL FROM VA AND DL (fig B.1) Where: • DL= Actual density of calibrating liquid • Dt= DL corrected for meter temperature • tL= Temperature of calibrating liquid • dDL= Density offset of calibrating liquid from VOS profile (fig. B.
Calibration Check Viscosity calibration is effectively immune to temperature or pressure errors when operating with Newtonian fluids. As a general guide, Table 6-1 shows the accuracy of the 7827 meter: Table 6-1 Error sources on indicated viscosity Error source 7827 A. Instrument accuracy (with Newtonian fluids) ±0.2 cP for 0.5-10 cP range ± 1 % of Full Scale Range for other ranges: • ± 1 cP for 1-100 cP range • ± 10 cP for 100-1,000 cP range • ± 200 cP for 1,000-20,000 cP range 6.4.
Calibration Check Using 795X Processing Electronics Figure 6-2 Example calibration certificate for the 7827 digital viscosity meter CALIBRATION CERTIFICATE 7827CBANATEABA VISCOMETER SERIAL NO CAL DATE PRESSURE TEST : : : 271542 24JUL08 160 Bar VISCOSITY CALIBRATION @ 20°C (free-stream) VISCOSITY (cP) VISCOSITY = V0 249.35 115.04 82.92 36.88 26.31 13.24 8.15 + V1.1/Q**2 + V2.
Calibration Check 48 Micro Motion 7827 Digital Viscosity Meter
Using 795X Processing Electronics Chapter 7 General Maintenance 7.1 Introduction This chapter describes which procedures to take in the event of a fault developing with the 7827 digital viscosity meter system. If the problem requires more effort than can be described in this document, contact Micro Motion for further assistance.
General Maintenance 6. Check that the Signal Converter is providing adequate power to the meter and that the Signal Converter itself is functioning properly. Check calibrations should be carried out at specified intervals in order to highlight a malfunction or deterioration in meter performance. If a fault or a drop in performance is discovered, further tests – as described in "fault analysis" below – are required to identify the cause of the fault.
General Maintenance Using 795X Processing Electronics Table 7-1 Error checking for viscosity What to look for: What to check next: Indicated viscosity Reading unsteady (more than ±5 cP) • Time periods τA & τB (below). • Is the viscosity signal input 0 V connection (PL2 pin2) connected to 0V on the Signal Converter (PL1 pin 4)? • If the readings are still unsteady, the installation is probably the cause of the fault (see Section 7.3.3 below).
General Maintenance Table 7-2 Error checking for density What to check: What to look for: What to check next: Indicated density (loc 014) Reading unsteady (more than ±1kg/m3) • Time period τB (below). • Is the signal input 0V connection (PL2 pin2) connected to 0V on the Signal Converter (PL1 pin 4)? • If the reading is still unsteady, the installation is probably the cause of the fault (see Section 7.3.3 below).
General Maintenance Electrical error checking continued What to check: Voltage at viscosity signal input on Signal Converter: What to check next: > 60 mA Electronics drawing excessive current: There is a fault with the maintaining amplifier board. Contact Micro Motion for replacement electronics. 5 V to 15 V dc, switching to 0 V Correct waveform being sent from the meter. High or low constant voltage The meter is not supplying the Signal Converter with the correct waveform.
General Maintenance Table 7-4 54 Installation checks continued What to check: What to look for: What to check next: Installation dimensions Check the key dimensions as specified in Chapter 2 for your installation. • Your key dimensions should match those detailed in the Installation chapter for your meter for your mounting configuration. Product build up on the tines Product which has stuck to the tines • Remove with a suitable solvent.
A.
Calculated Parameters A.2.2 General viscosity equation The quality factor of a resonator is proportional to the inverse square root of viscosity. To calibrate the resonator against fluid viscosity, the following quadratic expression is used: η = V * ( V0 + V1.
Calculated Parameters ρv = ρt - [ K20 + K21*X + K22*X2] Calculated Parameters [5] where: • ρv = Viscosity-corrected density (kg/m3) • ρt = Temperature-corrected density (kg/m3) • X = 1/Q2 (inverse square of the quality factor) • K20, K21, K22 = Meter calibration constants for each calibrated range Note: Viscosity correction on indicated density is not needed where the fluid viscosity is less than 100 cP as the effect may be considered negligible. A.3.
Calculated Parameters Figure A-1 The Velocity Of Sound (VOS) / density relationship Fluid actual velocity of sound (m/s) 2,000 1,500 +1 kg/m3 +0.5 kg/m3 OPTIMISED 1,000 -0.5 kg/m3 -1 kg/m3 500 0 200 400 600 800 1,000 1,200 1,400 1,600 Density (kg./m3) A.3.6 Density scaling Once the indicated density has been corrected for temperature, viscosity and VOS, the result is scaled to display density in any set of units. The following expression is used: ρ = ρvos * K [9] Where: A.
Safety Certification B.1 Calculated Parameters Appendix B Safety Certification Safety certification Please contact Micro Motion if you need to have copies of the latest safety certification for the 7827 digital viscosity meter.
Safety Certification 60 Micro Motion 7827 Digital Viscosity Meter
C.1 Calculated Parameters Appendix C Product Data Density / temperature relationship of hydrocarbon products Crude oil Table C-1 Safety Certification C.1.1 Crude oil Temp. (°C) Density (kg/m3) 60 738.91 765.06 791.94 817.15 843.11 869.01 894.86 920.87 946.46 55 742.96 768.98 794.93 820.83 846.68 872.48 898.24 923.95 949.63 50 747.00 772.89 798.72 824.51 850.25 875.94 901.80 927.23 952.82 45 751.03 776.79 802.50 828.17 853.81 879.40 904.96 930.50 956.
Product Data Table C-2 Refined products continued Temp. (°C) Density (kg/m3) 15 650.00 700.00 750.00 800.00 850.00 900.00 950.00 1000.00 1050.00 10 654.85 704.66 754.50 803.71 853.53 903.47 953.41 1003.36 1053.32 5 659.67 709.30 758.97 807.41 857.04 906.92 956.81 1006.72 1056.63 0 664.47 713.92 763.44 811.10 860.55 910.37 960.20 1010.07 1059.
Product Data Density of ambient air Calculated Parameters C.1.4 Taken at a relative humidity of 50%. Density of ambient air (in kg/m3) Table C-4 Air Pressure Air Temperature (°C) (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.
Product Data C.1.6 Velocity of sound in liquids Table C-6 Velocity of sound in liquids Liquid Temp. (t °C) Velocity of Sound ( c ms–1) Rate of Change ( δc / δt ms–1K–1) Acetic acid 20 1173 ---- Acetone 20 1190 –4.5 Amyl acetate 29 1173 ---- Aniline 20 1656 –4.0 Benzene 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.
Product Data Velocity of sound in liquids continued Liquid Temp. (t °C) Velocity of Sound ( c ms–1) Rate of Change ( δc / δt ms–1K–1) n-Pentane 20 1044 –4.2 n-Propyl acetate 26 1182 ---- 20 1320 –4.3 Turpentine 25 1225 ---- Water (distilled) 10 1447.2 ---- 20 1482.3 ---- 30 1509.1 ---- 50 1542.5 ---- 70 1554.8 ---- –4 1430.2 ---- 00 1449.5 ---- 05 1471.1 ---- 15 1507.1 ---- 25 1534.
Product Data 66 Micro Motion 7827 Digital Viscosity Meter
D.1 Calculated Parameters Appendix D Return Policy General guidelines Information on return procedures and forms is available on our web support system at www.micromotion.com, or by phoning the Micro Motion Customer Service department. D.2 New and unused equipment Safety Certification Micro Motion procedures must be followed when returning equipment. These procedures ensure legal compliance with government transportation agencies and help provide a safe working environment for Micro Motion employees.
Return Policy 68 Micro Motion 7827 Digital Viscosity Meter
© 2009, Micro Motion, Inc. All rights reserved. P/N MMI-20015440, Rev. AA *MMI-20015440* For the latest Micro Motion product specifications, view the PRODUCTS section of our web site at www.micromotion.
