Emerson 3098 - Manuals

3098 Technical Manual Introduction 1-3 1.2 Functional Description GasLine ISOLATIONVALVE, D VALVE A VALVE B VENT AND INPUTFOR CALIBRATIONGASES VALVE C DIAPHRAGM PRESSUREREGULATOR FILTER PRESSURERELIEF VALVE OUTLET DENSITYMETER INSULATINGCOVER REFERENCECHAMBER PRESSURECONTROL VALVE CONTROLPRESSUREIND...

Introduction 3098 Technical Manual 1- 4 When the enclosure is sealed, the complete instrument is insulated so that rapid changes in ambient temperature will not upset the temperature equilibrium of the unit and produce thermal shock errors. Note that the 3098 may have been supplied without an enclos...

3098 Technical Manual Introduction 1-5 1.3 Definition of Terms 1.3.1 Specific Gravity ( G ) This is the ratio of the molecular weight of a gas (or gas mixture) to that of the molecular weight of dry air; the molecular weight of dry air is normally assumed to be 28.96469 (see Table 1). i.e G = M M G ...

3098 Technical Manual Introduction 1-7 1.4 Physical Properties of Gas Compounds Compound Formula Molecular Weight Specific Gravity Hydrogen H2 2.01594 .069600 Helium He 4.00260 .138189 Water Vapour H2O 18.01534 .621976 Nitrogen N2 28.01340 .967157 Carbon Monoxide CO 28.01055 .967058 Oxygen O2 31.998...

Introduction 3098 Technical Manual 1- 8 1.5 Applications The following are typical applications where specific gravity measurement is an essential parameter. 1.5.1 Supplementary Gas Supply This system is used to top up normal supplies during peak periods. Specific gravity monitoring of a propane/air...

3098 Technical Manual Installation Procedure 2-1 Chapter 2 Installation Procedure 2.1 Installation Procedure The procedure for installing the 3098 involves the following steps: Check all components are present (Section 2.2) Position and fix the 3098 enclosure (Section 2.3) Connect the gas supply lin...

Installation Procedure 3098 Technical Manual 2-2 2.3.2 Connections There are four connections that need to be made to the 3098: three gas pipeline connections and one electrical connection through an IP rated cable gland. The gas pipeline connections take the form of ¼” Swagelok bulkhead fittings, a...

3098 Technical Manual Installation Procedure 2-3 The graph below gives an indication of the typical errors associated with using different reference chamber pressures for natural gas with a reasonably constant specific gravity (in the range of 0.55-0.8). This is typical for natural gas metering mark...

3098 Technical Manual Installation Procedure 2-5 Purge Cycling 10. Close valve (C). 11. When Control Pressure Indicator is at the desired value, shut valve (A) and open valve (F). Allow the gas to vent to atmospheric pressure. 12. Close valve (F) and open valve (A). 13. When Control Pressure Indicat...

Installation Procedure 3098 Technical Manual 2-6 IMPORTANT NOTE If the application is running with a reference pressure less than 45.5 psi (3 BarA), the maximum flow rate that can be used for correct operation is 50cm 3 /s. A full explanation of this effect is given in Accuracy Considerations, Chapt...

3098 Technical Manual Installation Procedure 2-7 2.7 Outline dimensional drawings The drawings below show a 3098 without an enclosure. For dimensions of small and large enclosures, see the following two pages. 1 0 .5 ” (2 8 6 .4 ”) 12. 4” (31 4m m) 4.4” (112mm)

Installation Procedure 3098 Technical Manual 2-8 Small Enclosure Dimensions Large Enclosure Dimensions

3098 Technical Manual Electrical Connections 3-1 Chapter 3 Electrical Connections This chapter This chapter contains details and wiring diagrams for connecting the 3098 to 7950/51/55 Signal Converters and Flow Computers, and more generally to other equipment in both hazardous and non-hazardous situa...

Electrical Connections 3098 Technical Manual 3-2 INTERCONNECT PCB 78121503 TERMINAL PCB 78121502 SPOOLBODY 78121201 AMPLIFIER PCB 78121501 PICK UP COIL DRIVE COIL BN PL1 13 20 2 BN BN I/P + R PL2 14 19 3 O R I/P - O PL5 16 18 4 R O O/P + Y PL6 15 17 5 B Y O/P - R PL3 22 V + G PL4 21 V - 23 1 2 4 3 -...

3098 Technical Manual Electrical Connections 3-3 3.3 Certificate conditions for hazardous areas For details of hazardous area installations, please refer to safety instructions (30985018/SI). The 3098 can be electrically connected in either a 2-wire or 3-wire configuration. A schematic block diagram...

Electrical Connections 3098 Technical Manual 3-4 3.4 Use with Signal Converters and Flow Computers The meter can be operated in two general environments, either in SAFE AREAS or in HAZARDOUS AREAS. When used in hazardous areas, safety barriers or galvanic isolators MUST be placed between the meter a...

3098 Technical Manual Electrical Connections 3-5 3.5 System Connections (7951/7950/7955) The density and power connections to the 3098 in safe and hazardous areas are shown in the following diagrams: 3.5.1 7950 2-wire configuration 3098 7950 Signal Converter 1 + SIG A 2 - 3 + SIG B 4 - 330R Density ...

3098 Technical Manual Electrical Connections 3-7 3.5.3 7951 2-wire configuration 3098 7951 Signal Converter/Flow Computer 1 + SIG A 2 - 3 + SIG B 4 - 330R 24V pwr + PL5/9 (SK6/22) Ch.1 PL5/1 (SK6/14) PL5/2 (SK6/15) PL5/10 (SK6/24) PL5/9 (SK6/22) Ch.2 PL5/3 (SK6/16) PL5/4 (SK6/17) PL5/10 (SK6/24) Den...

3098 Technical Manual Electrical Connections 3-11 3.6 System Connections (customer’s own equipment) 3.6.1 Non-hazardous areas Power supply to Density Meter: 15.5V to 33Vdc, <20mA. Power supply to PRT: 5mA max. The frequency at which the meter is operating can be detected in one of two ways: a. Fo...

Electrical Connections 3098 Technical Manual 3-14 3.7 Post-installation checks After installation, the following procedure will indicate to a high degree of confidence that the meter is operating correctly. a. Electrical Check Measure the current consumption and the supply voltage at the meter ampli...

3098 Technical Manual Accuracy Considerations 4-1 Chapter 4 Accuracy Considerations This chapter This chapter provides a method for estimating the accuracy of 3098 measurements under various conditions. 4.1 Accuracy Considerations The ‘controlled condition’ which establishes a direct relationship be...

Accuracy Considerations 3098 Technical Manual 4-2 3098 SPECIFIC GRAVITY METER CONTROL PRESSURE SELECTION Date: ................................. Type of Gas: ................................... Specific Gravity Range: ............. to ............ 3098 Serial No. ................... Temperature Coef...

Accuracy Considerations 3098 Technical Manual 4-4 4.2 Calibration (for non-natural gas applications) The instrument is supplied with its reference chamber empty and thus in an un-calibrated condition. After installation on site it is necessary to decide what reference chamber pressure to use, and th...

3098 Technical Manual Maintenance & Fault Finding 5 - 1 Chapter 5 Maintenance & Fault Finding 5.1 Introduction This chapter deals with the recommended servicing and maintenance that can be carried out under field conditions, including calibration checks, faultfinding procedures and simple ma...

Maintenance & Fault Finding 3098 Technical Manual 5-4 5.2 Maintenance Apart from scheduled calibration checks and filter replacements (these being dependent upon the condition of the sample gas) no other routine maintenance should be required. When a fault is suspected, the 3098 can be easily di...

Maintenance & Fault Finding 3098 Technical Manual 5-8 5.2.4 Re-assembly Procedure 1. Invert the 3098 so that the diaphragm counter-bore faces upwards. 2. Locate the diaphragm assembly into the counter-bore housed in the welded assembly - not the base plate. 3. Carefully replace the base plate ov...

Maintenance & Fault Finding 3098 Technical Manual 5-10 5.2.7 Leak Testing the 3098 Leaks incurred during servicing can be categorised under two main headings: a) Reference Chamber leaks 1. Charge the reference chamber to 6.5 bar G using any clean dry gas. 2. Pass a gas of constant specific gravi...

3098 Technical Manual Specification 6-1 Chapter 6 Specification 6.1 3098 Specification Note: Some parts of this specification (marked with ‘*’) cannot be guaranteed for 3098 meters supplied without an IP-rated enclosure (see Important Notice on page 1-1). 6.1.1 Performance Specific Gravity limits: 0...

3098 Technical Manual Performance Optimisation A-1 Appendix A Performance Optimisation A1. Introduction The 3098 Specific Gravity Meter uses a vibrating element density sensor that is located within a pressure regulating system. The arrangement is such that the density output signal can be directly ...

Performance Optimisation 3098 Technical Manual A-2 Note: When sample gas is flowing through the instrument, the reference chamber pressure is indicated on a dial gauge within the insulated enclosure. The indicated pressure is in bar gauge whilst the pressures quoted in this text are in bar absolute ...

Performance Optimisation 3098 Technical Manual A-4 COMPRESSIBILITY FACTOR The normal or base density ( ρ s ) is given by the equation: ρ ρ s s s P P t t = x x x Z Z s A5 Where: P s , t s & Z s = Values of pressure, temperature and compressibility at standard conditions. ρ , P, t & Z = Values...

3098 Technical Manual Performance Optimisation A-5 TOTAL FACTOR CALCULATIONS Total factors when using calibration gases as reference: [ ] E X x A A X Y y X x A Y X a 1 1 1 1 1 = − − − − − − − − ( ) ( ) ( ) ( ) ( ) A10 E b 1 = As in equation A10 but substituting B for A E c 1 = As in equation A10 but...

Table A1 12 3 At base conditions of °C & bars At sample gas conditions of °C & bars Gas T y pe Mol. Mass M γ at sample conds. 4 Z s 5 ρ s true 6 V F 7 Z 8 Z F 9 E F 10 Δ F % 11 E 1 12 Δ 1 % 13 E 2 14 Δ 2 % 15 ρ s ind. Cal X xx x X Cal Y yy E 2y Y’ Sample A aE 1a E 2a A’ Sample B bE 1b E 2b B...

Table A2 12 3 At base conditions of °C & bars At sample gas conditions of °C & bars Gas T y pe Mol. Mass M γ at sample conds. 4 Z s 5 ρ s true 6 V F 7 Z 8 Z F 9 E F 10 Δ F % 11 E 1 12 Δ 1 % 13 E 2 14 Δ 2 % 15 ρ s ind. Cal methane 16.04 1.32 0.9977 X 0.7171 0.9916 0.9876 0.9899 x 0.9816 1.84 ...

Performance Optimisation 3098 Technical Manual A-10 Alternative simplified method of deriving modified values of Y (the nitrogen SG value used for calibration) to produce a nil error condition for a Methane/Gas C (or Gas B or Gas A) calibration. Y X Y y X x C c X x x C X ' ( ) = + − §© ¨ ·¹ ¸ − §© ¨...

3098 Technical Manual Principles of Operation B-1 Appendix B Principles of Operation B1.1 Theory - Specific Gravity Measurement By definition: Gas Specific Gravity = Molecular Weight of Gas Molecular Weight of Standard Air i.e. G M M G A = (1) where M A is taken as 28.96469 Relative Density = Densit...

Principles of Operation 3098 Technical Manual B- 2 ρ 2 2 2 2 2 M P Z RT K = = (6) If now the two gases can be maintained at the same temperature, from equations 4 and 6: ρ 1 1 1 2 1 2 1 = P = 2 M Z RT KM Z Z (7) Finally, by using the sample gas (or a gas having a similar supercompressibility factor)...

3098 Technical Manual Returns Forms C-1 Appendix C Returns Forms The Returns Forms , contained in this Appendix, must be copied and completed whenever a meter is to be returned to the factory for servicing, calibration or repair. This must be done before the product is shipped. There are Returns For...

© 2007, Micro Motion, Inc. All rights reservedGI-00381 (5/07) Micro Motion Return Policy For Use in the U.S.A.With New and Unused Micro Motion Equipment Definitions New and unused equipment Only equipment that has not been removed from the original shipping package will be considered new and unused ...

Micro Motion Return Policy for Use in the U.S.A. with New and Unused Micro Motion Equipment 2 Step 1 Obtaining an RMA number A Return Material Authorization (RMA) number must be obtained prior to returning any equipment to Micro Motion for any reason. To obtain an RMA number, contact the Micro Motio...

Micro Motion Return Policy for Use in the U.S.A. with New and Unused Micro Motion Equipment 3 Document submittal Submit the following shipping documents inside the shipping container: • One (1) copy of the Packing List. Submit the following shipping documents to your Micro Motion customer service re...

Statement of New and Unused Equipment 1) Return Material Authorization (RMA) Number: Equipment Identification 2) For each instrument being returned, list a description or model number and its serial number. Description or Model Number Serial number 3) Reason for return: Shipping Requirements 4) Clea...

Micro Motion Return Policy for Use in the U.S.A. with Used Micro Motion Equipment 2 Step 1 Obtaining an RMA number A Return Material Authorization (RMA) number must be obtained prior to returning any equipment to Micro Motion for any reason. To obtain an RMA number, contact the Micro Motion Customer...

Micro Motion Return Policy for Use in the U.S.A. with Used Micro Motion Equipment 3 Step 3 Material Safety Data Sheets (MSDS) Included with the returned equipment, you must provide a Material Safety Data Sheet (MSDS) for each substance that has come in contact with the equipment being returned, incl...

Micro Motion Return Policy for Use in the U.S.A. with Used Micro Motion Equipment 4 Document submittal Submit the following shipping documents inside the shipping container: • One (1) copy of the Packing List. Submit the following shipping documents to your Micro Motion customer service representati...

Sensor Decontamination / Cleaning Statement Refer to Micro Motion Return Policy for Use in the U.S.A. with Used Micro Motion Equipment 1) Return Material Authorization (RMA) Number: 2) Equipment to be returned Model Number: Serial Number: 3) Reason for return Process and Decontamination/Cleaning Flu...

Micro Motion ® 3098 Technical Manual 30985020_US, Rev. B October 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 ...