Scanner 2000 Steam Mass Flow Transmitter ... - Spirax Sarco

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Section 2 Scanner ® 2000 microEFM Pressure Safety Precautions ! ! 26 SP/SWP (PSIA) WARNING: Before connecting the Scanner 2000 microEFM to a flow line, consider the pressure rating of the sensor, and the presence of harmful gases. The tubing and fixtures used to connect the sensor to the manifold in the flow line must be manufactured from materials that are appropriate for the pressure ratings of the sensor used. WARNING: If H2S is present, use a NACE sensor and take appropriate precautions to avoid exposure to this hazardous gas. Table 2.1—MVT Pressure Limits, Approvals and Bolt Specifications DP (IN H2O) Max. Overrange (PSIA) Measurement Canada Approved ASME Pressure Vessel Code Compliant CSA Single Seal Approved Standard Bolts NACE Bolts 100 30 150 X X X B7 or 316 SS B7M 300 200 450 X X X B7 or 316 SS B7M 300 840 500 200 750 X X X B7 or 316 SS B7M 1500 200 2250 X X X B7 or 316 SS B7M 1500 300 1500 400 1500 840 3000 200 4500 X X B7 or 17-4 SS Inconel 3000 300 3000 400 3000 840 5300 200 7420 B7 Inconel 5300 300 5300 400 5300 840 Wiring Considerations in Hazardous Area Installations CAUTION For explosion-proof installations, all signal cable from other devices and power must observe local wiring practices for area classification. The cable used between the Scanner 2000 and other devices must be either armored MC-HL type cable or standard cable routed through conduit. In accordance with EN60079-0, Clause 16.5, all cable and cable glands must be rated for 80ºC. For Zone 1 or Division 1 explosion-proof installations, conduit seals must be installed within 18 in. of the Scanner 2000.

Scanner ® 2000 microEFM Section 2 RTD Assembly Options (for Gas and Liquid Flow Runs Only) The RTD is installed in a thermowell downstream of the primary differential pressure source. The location of the thermowell should conform to the relative standard to ensure accurate measurement. CAUTION The RTD must be fitted to a suitably certified and dimensioned enclosure or fitted to an enclosure in a non-hazardous area. Cameron recommends the use of the Barton Model 21 RTD, a 4-wire, 100-ohm explosion-proof RTD assembly that can be connected to the Scanner 2000 enclosure without conduit or a conduit seal. For details, see Explosion-Proof RTD Assembly, page A-3. A 2-wire, 3-wire, or 4-wire RTD assembly may be used to provide a process temperature input. Mounting Options The Scanner 2000 microEFM can be mounted using the following methods: • Direct-mount to an orifice or cone type DP meter. The integral multi-variable sensor may be connected to the pressure taps with stabilizers or a heavy wall nipple with adapter flanges, and a 5-valve manifold. A bottom-port MVT is recommended for gas measurement; a side-mount MVT is recommended for liquid or steam measurement. • Direct-mount to a turbine meter. The CSA-certified instrument can be mounted to a turbine meter using a pipe adapter and union connection (Figure 2.2, page 28). The ATEX-certified instrument can be mounted to a Barton 7000 Series meter using a turbine meter pickup extension (Figure 2.3, page 29). • Pole-mount. The instrument can be mounted on a 2-in. pole using a NuFlo hardware kit, or bulkheadmounted to a flat, vertical surface (Figure 2.4, page 29). Pole mounting may be preferred where limited space or pipe vibration prohibits direct-mount installation. A horizontal pipe mount is recommended for liquid and steam installations using a side-port MVT and block manifold. Tubing is used to connect the integral MVT to the orifice meter or cone meter. If a Scanner 2000 will be used for steam measurement, a condensate pot must also be installed to protect the Scanner 2000 from extreme temperatures. See Measuring Steam via a Differential Pressure Meter, page 39, for details. The following accessories are also recommended: • a 5-valve manifold for connecting process lines to the integral MVT • an RTD assembly (see Explosion-Proof RTD Assembly, page A-3) for process temperature input on gas flow runs and compensated liquid flow runs (not recommended for steam flow runs) • tubing and/or pipe for plumbing process connections • explosion-proof signal cable for remote turbine connections (stranded, shielded cable is recommended) Pole-Mount Installation To mount the Scanner 2000 using the optional pole-mount kit, perform the following steps: 1. Determine the pipe orientation (horizontal or vertical) that will best accommodate process connections and field wiring connections. A horizontal pipe mount is recommended for liquid and steam installations using a side-port MVT and block manifold. 2. Connect the mounting bracket to the Scanner 2000 using the two bolts provided (Figure 2.4, page 29). 3. Position the U-bolt around the pipe and through the support bracket provided with the U-bolt. 27

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