Vaisala MGP261, Инструкция по установке и безопасности

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Installation Overview
Figure 2 (page 10) shows an example MGP261 ball valve installation. The figure highlights the
correct wiring routes and shows the recommended installation depth and orientation.
Always use a separate cable for the optional (Ex ia) external
pressure or temperature sensor input wiring (1), and make sure the wiring
remains separated from the terminals and wiring (2) on the other side of the
metal barrier (3) on the component board.
CAUTION!
Make sure the installation valve and threads are appropriate from
the valve specifications. The correct thread type in which to install MGP261 is
1.5" female NPT . Installing into any other thread type can damage the
equipment and compromise the leak tightness of the connection. If unsure,
verify the thread type with a 1.5" NPT thread gauge.
CAUTION!
1
2
4
3 5
Figure 2 MGP261 Installation Example with Wiring Routes and Recommended Orientation and
Depth
1 Optional external pressure or temperature sensor input wiring (Ex ia): use the M16x1.5
lead-through and route the cable directly to the terminal.
2 Standard analog output, power supply input, and RS-485 communication wiring: use the
M20x1.5 lead-throughs and route the cables to the terminals through the openings below
the component board.
3 Metal barrier separating the intrinsically safe optional external sensor input terminals from
the analog output, power supply input, and RS-485 terminals on the component board.
4 1.5" male NPT thread on MGP261: never install to any other thread type than 1.5" female
NPT .
5 For best results, install MGP261 horizontally and position the tip of the probe within 1/3 d
of the pipe centerline. In smaller pipes, the installation depth can be adjusted by using an
adapter (for example, a ball valve).
10 M212238EN-B