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Emerson Process Management MMI-20020979 manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    Installation Manual MMI-20020979, Rev AB May 2015 Micro Motion ® Gas Density Meters (GDM) Fiscal gas density measurement[...]

  • Page 2

    Safety and approval information This Micro Motion product complies with all applicable European directives when properly installed in accordance with the instructions in this manual. Refer to the EC declaration of conformity for directives that apply to this product. The EC declaration of conformity, with all applicable European directives, and the[...]

  • Page 3

    Contents Chapter 1 Planning ...........................................................................................................................1 1.1 Installation checklist ....................................................................................................................... 1 1.2 Best practices .............................[...]

  • Page 4

    Contents ii Micro Motion ® Gas Density Meters[...]

  • Page 5

    1 Planning Topics covered in this chapter: • Installation checklist • Best practices • Recommended sample flow rate • Power requirements • Installation requirements for the thermo-well pocket • Recommended installations for gas density applications • Perform a pre-installation meter check 1.1 Installation checklist □ Verify the cont[...]

  • Page 6

    □ Make sure that the process gas meets the recommended characteristics regarding composition, temperature, and pressure for your installation. □ Verify that you have all equipment necessary for your installation. Depending on your application, you may be required to install additional parts for optimal performance of the meter. □ Follow recom[...]

  • Page 7

    1.3 Recommended sample flow rate Use the smallest acceptable flow rate for the process gas passing through the meter. This ensures a sample gas flow rate that is representative of the main flow with regard to the proportions of different gas constituents. Micro Motion recommends a gas flow rate of 5 ±1 l/hr (0.176 ±0.35 ft 3 /hr), although a flow[...]

  • Page 8

    1.4 Power requirements Following are the DC power requirements to operate the meter: • 24 VDC, 0.45 W maximum • Minimum 22.8 VDC with 1000 m (3280 ft) of 0.20 mm 2 (18 AWG) power-supply cable • At startup, power source must provide a minimum of 0.5 A of short-term current at a minimum of 19.6 V at the power-input terminals. Power cable recomm[...]

  • Page 9

    Minimum wire area (mm 2 per meter) Figure 1-3: 0.00 0 0.05 0 0.10 0 0.15 0 0.20 0 0.25 0 0.30 0 0.35 0 0.40 0 0.45 0 0.50 0 0.55 0 0.60 0 0.65 0 0.70 0 0.75 0 0.80 0 0.85 0 0.90 0 10 0 20 0 30 0 40 0 50 0 60 0 70 0 80 0 90 0 100 0 Mi nimum Wir e Ar e a (mm 2 ) Dis t a nc e of I nstall a t ion (m ) M i ni mu m W i re Ar ea ( m m 2 ) 22 .8V 24 V 1.5 [...]

  • Page 10

    Micro Motion thermo-well pocket dimensions Figure 1-4: 6.00 (152.30) Ø3.94 (100.00) 1.59 (40.30) 2.83 (72.00) Dimensions in inches (mm) 1.6 Recommended installations for gas density applications Micro Motion recommends specific installations for the GDM depending on the gas density application – as defined by international standards, ISO 5167 an[...]

  • Page 11

    Meter installation in a pressure recovery application The most common location for a density device in an orifice plate metering system is downstream from the orifice plate. This installation is commonly referred to as the pressure recovery method. The pressure recovery method allows an optimal gas flow rate, and provides easy access for checking f[...]

  • Page 12

    Meter installation in pressure recovery application Figure 1-5: STATUS SCROLL SELECT C A E A B D G F H J K I GDM A. Meter isolation valves B. Flowmeter C. Venting valve D. Flow control needle valve E. Filter F. Pipeline diameter G. Differential pressure transmitter H. Density point I. Distance is eight times the pipeline diameter J. Thermal insulat[...]

  • Page 13

    • Pressure drops through the valves and filters do not affect the reading. The pressure inside the meter and at the gas outlet is equal to the pressure at the orifice downstream point. • The correct expansion factor for the downstream point is used in the orifice flow calculations. • The measured density at the density point is used in the ma[...]

  • Page 14

    Meter installation in differential pressure application Figure 1-6: STATUS SCROLL SELECT E A A B D C F G H GDM A. Meter isolation valves B. Flowmeter C. Venting valve D. Flow control needle valve E. Filter F. Differential pressure transmitter G. Thermal insulation H. Vent/vacuum test point Note Do not insulate the transmitter (electronics) and main[...]

  • Page 15

    Tip To avoid excessive pressure drops in your sample pipeline, be sure to monitor the condition of the filters. Do this by varying the sample flow rate and monitoring the magnitude of the resultant density changes. Pressure drops through the filters can cause density errors if they become too large. 1.6.2 Meter installation in a vented gas applicat[...]

  • Page 16

    Meter installation in a vented gas application Figure 1-7: STATUS SCROLL SELECT A B D F A E C G H GDM GDM I A. Meter isolation valves B. Flowmeter C. Venting valve D. Flow control needle valve E. Filter F. Pressure regulator G. Thermal insulation H. Vent/vacuum test point I. Low-pressure vent system connection point Note Do not insulate the transmi[...]

  • Page 17

    Meter installation in an ultrasonic meter application Figure 1-8: STATUS SCROLL SELECT E C A B D A G H F GDM A. Meter isolation valves B. Flowmeter C. Venting valve D. Flow control needle valve E. Filter F. Annubar flowmeter G. Thermal insulation H. Vent/vacuum test point Note Do not insulate the transmitter (electronics) and maintain a nominal 1-i[...]

  • Page 18

    Meter installation with a turbine flow meter Figure 1-9: STATUS SCROLL SELECT A B D A E C H F G GDM A. Meter isolation valves B. Flowmeter C. Venting valve D. Flow control needle valve E. Filter F. Turbine flowmeter G. Thermal insulation H. Vent/vacuum test point Note Do not insulate the transmitter (electronics) and maintain a nominal 1-in clearan[...]

  • Page 19

    CAUTION! Handle the meter with care. Follow all corporate, local, and national safety regulations for lifting and moving the meter. 2. Visually inspect the meter for any physical damage. If you notice any physical damage to the meter, immediately contact Micro Motion Customer Support at flow.support@emerson.com . 3. Position and secure the meter in[...]

  • Page 20

    2 Mounting Topics covered in this chapter: • Mount the meter in the pipeline • Connect the gas bypass lines • Rotate the electronics on the meter (optional) • Rotate the display on the transmitter (optional) • Post-installation check 2.1 Mount the meter in the pipeline Prerequisites Important Micro Motion recommends that you install the m[...]

  • Page 21

    Meter installation pieces Figure 2-1: STATUS SCROLL SELECT C D E B A A. M8 socket-head cap screw (for mounting) B. Meter housing C. Aluminum sleeve (cylinder) D. Anti-vibration gasket E. Thermo-well pocket Procedure 1. (Recommended) Install the thermo-well pocket in the aperture created in the pipeline and weld it into place. 2. Pour the supplied s[...]

  • Page 22

    Typical installation in pipeline (with thermo-well pocket) Figure 2-2: STATUS SCROLL SELECT Dimensions in inches (mm) 3.74 (95) 2.2 Connect the gas bypass lines Once you have mounted the meter in the pipeline, you are ready to connect the gas bypass lines. Adjacent to the gas connection ports, the meter provides two filters to ensure optimal perfor[...]

  • Page 23

    Gas inlet/outlet connectors Figure 2-3: STATUS SCROLL SELECT C B A A. Process gas outlet B. Process gas inlet C. Filter Mounting Installation Manual 19[...]

  • Page 24

    2.3 Rotate the electronics on the meter (optional) You can rotate the transmitter on the meter up to 90°. 1. Using a 4 mm hex key, loosen the cap screw that holds the transmitter in place. Component to secure transmitter in place Figure 2-4: A A. M5 socket-head cap screw 2. Rotate the transmitter clockwise to the desired orientation up to 90°. 3.[...]

  • Page 25

    Display components Figure 2-5: B C D A D E A. Transmitter housing B. Sub-bezel C. Display module D. Display screws E. Display cover Procedure 1. If the meter is powered up, power it down. 2. Turn the display cover counterclockwise to remove it from the main enclosure. 3. Carefully loosen (and remove if necessary) the semi-captive display screws whi[...]

  • Page 26

    2.5 Post-installation check After you complete the installation of the meter, pressure test the meter and associated pipework to 1 ½ times the maximum operating pressure. Mounting 22 Micro Motion ® Gas Density Meters[...]

  • Page 27

    3 Wiring Topics covered in this chapter: • Available output terminals and wiring requirements • Hazardous area output wiring 3.1 Available output terminals and wiring requirements Three pairs of wiring terminals are available for transmitter outputs. These outputs vary depending on your transmitter output option ordered. The Analog (mA), Time P[...]

  • Page 28

    Information provided about wiring the safety barriers and galvanic isolators is intended as an overview. You should wire the meter according to the standards that are applicable at your site. CAUTION! • Meter installation and wiring should be performed by suitably trained personnel only in accordance with the applicable code of practice. • Refe[...]

  • Page 29

    RS-485 output and cable entity parameters (MTL7761AC) Table 3-3: Input parameters Voltage (U i ) 18 VDC Current (I i ) 100 mA Internal capacitance (C i ) 1 nF Internal inductance (L i ) 0.0 H Output parameters Voltage (U o ) 9.51 VDC Current (instantaneous) (I o ) 480 mA Current (steady state) (I) 106 mA Power (P o ) 786 mW Internal resistance (R i[...]

  • Page 30

    3.2.2 Wire all available outputs using safety barriers Micro Motion provides a safety barrier installation kit for wiring the meter in a hazardous area. Contact your local sales representative or Micro Motion Customer Support at flow.support@emerson.com for more information on ordering a barrier kit. CAUTION! • Meter installation and wiring shoul[...]

  • Page 31

    Hazardous area mA/DO/TPS output wiring using safety barriers Figure 3-1: Bus Bar Hazardous Area Non-Hazardous Area MTL7761AC RS-485 A RS-485 B 3 4 1 2 24 VDC 24 VDC MTL7728P+ 24 VDC 3 4 1 2 MTL7728P+ 3 4 1 2 250 Ω MTL7728P+ 3 4 1 2 HART Device Signal Device See note mA1+ HART RS-485 PWR mA2/ TPS/DO A B Note The recommended resistance will vary dep[...]

  • Page 32

    CAUTION! • Meter installation and wiring should be performed by suitably trained personnel only in accordance with the applicable code of practice. • Refer to the hazardous area approvals documentation shipped with your meter. Safety instructions are available on the Micro Motion Product Documentation DVD and accessible on the Micro Motion webs[...]

  • Page 33

    Hazardous area output wiring using galvanic isolators (mA outputs option) Figure 3-2: mA1+ HART RS-485 PWR mA2 Hazardous Area Non-Hazardous Area MTL7761AC RS-485 A RS-485 B 3 4 1 2 MTL5541 2 1 14 13 12 11 MTL5523 2 1 24 VDC 14 13 12 11 24 VDC LINK 250 Ω MTL5541 2 1 14 13 12 11 24 VDC 250 Ω A B HART Device Signal Device 3.2.4 Wire Time Period Sign[...]

  • Page 34

    Note The RS-485 barrier is not isolated. Output(s) Isolator 4–20 mA + HART MTL5541 • Time Period Signal (TPS) • Discrete MTL5532 Modbus/RS-485 MTL7761AC Power MTL5523 Procedure 1. Wire the isolators to the appropriate output terminal and pins. Hazardous area output wiring using galvanic isolators (TPS and Discrete output options) Figure 3-3: [...]

  • Page 35

    The switches are located on the side of the isolator, and must be set to either Off (the up position) or On (the down position). MTL5532 switch location (plus ON/OFF switch position) Figure 3-4: 1 2 3 4 OFF ON MTL5532 switch settings Table 3-4: Switch ON/OFF? 1 ON 2 OFF 3 OFF 4 OFF Wiring Installation Manual 31[...]

  • Page 36

    4 Grounding The meter must be grounded according to the standards that are applicable at the site. The customer is responsible for knowing and complying with all applicable standards. Prerequisites Micro Motion suggests the following guides for grounding practices: • In Europe, EN 60079-14 is applicable to most installations, in particular Sectio[...]

  • Page 37

    Grounding Installation Manual 33[...]

  • Page 38

    *MMI-20020979* MMI-20020979 Rev AB 2015 Micro Motion Inc. USA Worldwide Headquarters 7070 Winchester Circle Boulder, Colorado 80301 T +1 303-527-5200 T +1 800-522-6277 F +1 303-530-8459 www.micromotion.com Micro Motion Europe Emerson Process Management Neonstraat 1 6718 WX Ede The Netherlands T +31 (0) 70 413 6666 F +31 (0) 318 495 556 www.micromot[...]