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

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.
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