Sensia QRATE Scanner 3300, Инструкция по установке, эксплуатации и обслуживанию

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Multi Variable Transmitter Mounting
The multi variable transmitter (also referred to as the MVT) will have a multi variable transducer attached. It will receive
the inputs from the transducers on the flow line, and transmit that information to the QRATE Scanner 3300. The multi
variable transmitter (MVT) may be directly mounted in the flow line, or be remotely mounted on a 2-in. pole using the a
U-bolt provided and the integral bracket, or mounted to a flat, vertical surface (shown in Figure 2.1, page 21 ).
The standard multi variable transducer (connected has process connections on the bottom, compensated liquid and steam
applications may require the use of a side-port multi variable transducer and side-mount manifold (to help eliminate air
in the process line). In such installations, an optional extension bracket is recommended to provide the necessary clear -
ance for the multi variable transducer and manifold assembly. This bracket is shown in Figure 2.1, page 21 . Contact
your local Sensia sales office for details.
Tubing is used to connect the integral multi variable transducer to the orifice meter or cone meter. If a multi variable
transducer will be used for steam measurement, a condensate pot must also be installed to protect the multi variable
transducer from extreme temperatures. See Installation Procedure—Remote Connection to a Turbine Meter, page 36 ,
for details.
The following accessories are also recommended:
• a multi variable transducer
• an RTD assembly 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
• signal cable for remote turbine connections (stranded, shielded cable is recommended)
The multi variable transmitter (MVT) may be mounted directly or remotely. To mount the MVT remotely, perform the
following steps:
1. Determine the piping configuration that will best accommodate process connections and field wiring connections. If
a side-port MVT and manifold is required (typically, only for compensated liquid and steam applications), an option -
al extension bracket may be connected to the standard bracket to provide additional clearance from the pipe.
2. Position the U-bolt around the pipe and through the support bracket provided with the U-bolt.
3. Align the mounting bracket against the pole so that the U-bolt passes through the mounting holes in the bracket.
Place the mounting plate over the threaded ends of the U-bolt and against the bracket, and secure the U-bolt with the
two nuts provided.
4. Install and connect process piping between the MVT and the turbine meter with appropriate fittings. Process piping
installation procedures vary with each application.
!
WARNING: HAZARDOUS AREA USE. The MVT must be certified for hazardous area use and must be in-
stalled in accordance with applicable standards and local wiring practices. Carefully review and follow the
MVT guidelines for hazardous area installation.
!
WARNING: Before connecting the MVT to a flow line, consider the pressure rating of the sensor. 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.
!
WARNING: All cable and cable glands must be rated for 80ºC.
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Section 2 QRATE Scanner 3300 integrated control flow computer