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接线 图 3-2: 增强型核心处理器端子 A. 棕色 B. 紫色 C. 黄色 D. 橙色 E. 灰色 F. 蓝色 G. 白色 H. 绿色 红色 接地螺钉(黑色) 3.1.2 使用屏蔽电缆连接核心处理器与传感器 先决条件 对于危险区域的安装, 核心处理器末端处的屏蔽电缆安装必须配合使用电缆接头。您可以 从高准购买符合危险区域使用要求的电缆接头。也可以使用其他供应商的电缆接头。 注意! • 传感器接线是本安型。为保持传感器接线是本安型,请使传感器接线独立于电源接线和输出 接线。 • 使电缆远离诸如变压器、电机和电源线等设备,这些设备都会产生大磁场。电缆、电缆密封 接头或导管安装不当,可能会导致测量不精确或流量计故障。 • 外壳密封不当可能会使电子部件受潮,进而可能导致测量误差或流量计故障的产生。将滴水 管安装在导管和电缆上(如有必要) 。检查并润滑所有密封垫圈和 O 型圈。完全关闭并拧紧 所有外壳盖和导线管开口。...
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接线 图 3-3: 电缆接头和电缆(分解图) A. 电缆 B. 密封螺母 C. 压紧螺母 D. 黄铜压缩环 E. 编织屏蔽层 F. 电缆 G. 胶带或热缩管 H. 卡座(图示为螺纹接头的组成部分) 螺纹接头 拧松压紧螺母中的螺纹接头。 将螺纹接头拧到 9 线制电缆的导线管开口上。用手拧紧它后再转一圈。 将压缩环、压紧螺母和密封螺母滑到电缆上。确保压缩环正确定向,以便锥形部分 与螺纹接头的锥形端正确接合。 将电缆末端穿过螺纹接头,使编织屏蔽层滑到螺纹接头的锥形端上。 将压缩环滑到编织屏蔽层上。 将压紧螺母拧到螺纹接头上。用手拧紧密封螺母和压紧螺母,确保压缩环可以固定 编织屏蔽层。 使用 25 毫米(1 英寸)扳手拧紧密封螺母和压紧螺母,扭矩为 20–25 英尺磅 (27–34 牛顿-米) 。参见图 3-4, 了解一个完整的电缆接头装配图示。 快速安装指南...
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接线 图 3-4: 组装的电缆接头和电缆的横截面 A. 电缆 B. 密封螺母 C. 密封件 D. 压紧螺母 E. 编织屏蔽层 F. 黄铜压缩环 G. 螺纹接头 拆下核心处理器盖。 在核心处理器处,根据以下程序连接电缆: a. 将各接线的裸端按颜色插入核心处理器末端相应的端子。不得露出任何裸线。 请参见下表。 表 3-2: 核心处理器端子标识 导线颜色 功能 黑色 屏蔽线 驱动 + 棕色 红色 驱动 – 橙色 温度 – 黄色 温度回升...
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接线 图 3-5: 双核处理器端子 A. 传感器 1 B. 传感器 2 图 3-6: 增强型核心处理器端子 A. 棕色 B. 紫色 C. 黄色 D. 橙色 E. 灰色 F. 蓝色 G. 白色 H. 绿色 红色 接地螺钉(黑色) b. 拧紧螺钉,以将接线固定到位。 c. 请确保垫圈完好,并为所有 O 型圈涂抹润滑脂,然后装回核心处理器外壳盖并 根据需要拧紧所有螺钉。 快速安装指南...
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Quick Start Guide MMI-20032808, Rev AB December 2016 ® Micro Motion Liquified Natural Gas Meter...
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Micro Motion employees. Micro Motion will not accept your returned equipment if you fail to follow Micro Motion procedures. Return procedures and forms are available on our web support site at www.micromotion.com, or by phoning the Micro Motion Customer Service department.
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Contents Contents Chapter 1 Planning ...........................1 Component identification ......................1 Installation checklist ........................1 Power requirements ........................2 Chapter 2 Mounting .........................4 Mount the sensors ..........................4 Mount the dual core processor (option 1) ..................4 Mount the enhanced core processor with MVD Direct Connect I.S. Barrier (option 2) .....5 Chapter 3 Wiring ..........................
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Contents Micro Motion Liquified Natural Gas Meter...
Planning Planning Topics covered in this chapter: • Component identification • Installation checklist • Power requirements Component identification Dual core processor 9-wire cable Model LNGM10 for filling measurement Model LNGS06 for returning measurement Installation checklist □ Make sure that the hazardous area specified on the approval tag is suitable for the environment in which the LNG meters will be installed.
Verify that you are using low-voltage DC power for the core processor. Excess voltage can damage the core processor. □ For I.S. applications, refer to Micro Motion ATEX, UL, or CSA installation instructions. □ Mount the LNG electronics in any orientation as long as the conduit openings do not point upward.
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Planning Cable sizing formula M = 18V + (R x L x 0.2A) • M: minimum supply voltage • R: cable resistance • L: cable length Table 1-1: Typical power cable resistance at 68 °F (20 °C) Wire gauge Resistance 0.0050 Ω/ft 14 AWG 0.0080 Ω/ft...
Mount the enhanced core processor with MVD Direct Connect I.S. Barrier (option 2) Mount the sensors Mount the LNGS06. Mount the LNGM10. Mount the dual core processor (option 1) Mount the dual core processor on either a pipe or a wall. Micro Motion Liquified Natural Gas Meter...
Mounting Figure 2-1: Dual core processor: pipe mount Figure 2-2: Dual core processor: wall mount Mount the enhanced core processor with MVD Direct Connect I.S. Barrier (option 2) Mount the enhanced core processor on either a pipe or a wall. Quick Start Guide...
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Mounting Figure 2-3: Enhanced core processor: pipe mount Figure 2-4: Enhanced core processor: wall mount Mount the barrier on a DIN rail. Micro Motion Liquified Natural Gas Meter...
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Mounting Figure 2-5: Barrier mount on DIN rail Quick Start Guide...
No bare wires should remain exposed. See the following table. Table 3-1: Core processor terminal designations Wire color Function Black Drain wires Brown Drive + Drive – Micro Motion Liquified Natural Gas Meter...
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Wiring Table 3-1: Core processor terminal designations (continued) Wire color Function Orange Temperature – Yellow Temperature return Green Left pickoff + Blue Right pickoff + Violet Temperature + Gray Right pickoff – White Left pickoff – Figure 3-1: Dual core processor terminals A.
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For hazardous area installations, shielded cable must be installed with cable glands at the core processor end. Cable glands that meet hazardous area requirements can be purchased from Micro Motion. Cable glands from other vendors can be used. CAUTION! •...
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Wiring Figure 3-3: Cable gland and cable (exploded view) A. Cable B. Sealing nut C. Compression nut D. Brass compression ring E. Braided shield F. Cable G. Tape or heat-shrink tubing H. Clamp seat (shown as integral to nipple) Nipple Unscrew the nipple from the compression nut.
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Function Black Drain wires Brown Drive + Drive – Orange Temperature – Yellow Temperature return Green Left pickoff + Blue Right pickoff + Violet Temperature + Gray Right pickoff – White Left pickoff – Micro Motion Liquified Natural Gas Meter...
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Wiring Figure 3-5: Dual core processor terminals A. Sensor 1 B. Sensor 2 Figure 3-6: Enhanced core processor terminals A. Brown B. Violet C. Yellow D. Orange E. Gray F. Blue G. White H. Green Ground screw (black) Quick Start Guide...
Use this section for a dual core processor installation. 3.2.1 Connect the 9-wire cable on a dual core processor Prerequisites Prepare and install the cable according to the instructions in the Micro Motion Liquified Natural Gas Meter Installation Guide. Procedure Remove the dual processor housing cover.
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3.2.2 Wire the dual core processor power supply Prerequisites Prepare and install the cable according to the instructions in the Micro Motion Liquified Natural Gas Meter Installation Guide. Procedure Connect the power supply wires to the positive (+) and negative (–) terminals.
3.3.1 Connect the 9-wire cable on an enhanced core processor Prerequisites Prepare and install the cable according to the instructions in the Micro Motion Liquified Natural Gas Meter Installation Guide. Procedure Insert the stripped ends of the individual wires into the terminal blocks. Ensure that no bare wires remain exposed.
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Wiring Procedure Connect the enhanced core processor to the barrier: a. Connect the RS-485 wires from the enhanced core processor to the I.S. RS-485 terminals at the barrier (terminals 43 and 44), matching A and B. See the following table and figure. b.
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B. Non I.S. terminals for connection to remote host and power supply 3.3.4 Wire the remote host to the MVD Direct Connect I.S. Barrier Connect the RS-485 wire from the barrier to the RS-485 terminals at the remote host. Micro Motion Liquified Natural Gas Meter...
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Wiring Figure 3-9: Barrier terminals A. I.S. terminals for connection to enhanced core processor B. Non I.S. terminals for connection to remote host and power supply Terminate the shields at the remote host. Do not add external resistors. The barrier contains internal pull-up/pull-down and termination resistors.
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. Micro Motion suggests the following guides for grounding practices: • Use copper wire, 2,0 mm or larger wire size.
Grounding Figure 4-1: Dual core processor grounding screws A. Internal grounding screws B. External grounding screw Ground the enhanced core processor Use this procedure if your installation contains an enhanced core processor. Note Ground the processor to earth, or follow ground network requirements for the facility. Improper grounding can cause measurement error.
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Grounding Figure 4-2: Enhanced core processor grounding screws A. Internal ground screw B. External ground screw C. Internal ground screw Micro Motion Liquified Natural Gas Meter...
Basic configuration Basic configuration Topics covered in this chapter: • Power on • Sensor start up checklist • Specifications Power on Before you apply power to the sensors, close and tighten all housing covers. WARNING! Operating the sensor without covers in place creates electrical hazards that can cause death, injury, or property damage.
MVD Direct Connect I.S. barrier Digital communications Modbus / RS-485 accepts data rates 4800, 9600, 19200, and 38400 baud for dual core pro- cessor and enhanced core processor with MVD Direct Connect I.S. barrier Micro Motion Liquified Natural Gas Meter...
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Basic configuration Output signals Measurement variables • Mass flow • Temperature Accuracy and flow rate Accuracy and flow rate LNGS06 LNGM10 Batch accuracy ±1.0% of batch ±0.5% of batch Temperature accuracy ±1.0 °C ±0.5% of reading (proc- ±1.0 °C ±0.5% of reading (proc- ess temperature: -100 to 60 °C) ess temperature: -100 to 60 °C) ±1.0 °C ±1.0% of reading (proc-...