Teledyne 2150EX, Инструкция по установке и эксплуатации, Страница: 30 / 146

2150EX Area Velocity Flow Module
Section 2 Preparation and Installation
2-4
2.3 Site Examples
Figures 2-1, 2-2, and 2-3 illustrate typical round-pipe sites. Key
items are called out in the illustration and explained below.
Figures 2-1 and 2-2 represent portable installations . For
details about portable installations, see Section 2.4.
Figure 2-3 represents a permanent installation . For details
about permanent installations, see Section 2.5.
The computer running Flowlink (Figures 2-1 and 2-3) or the
2101 Field Wizard module (Figure 2-2) should be located
outside the potentially explosive atmosphere. The computer and
modules communicate with the 2150EX module.
The 2150EX area velocity flow module measures and stores
the stream data. In portable installations (Figures 2-1 and 2-2),
it is attached to a
2191EX or 2196EX battery module , which
supplies power to the module.
As described in Section 2.6.1, the EX network cable connects to
the top of the 2150EX stack and extends to the interface of the
safe and hazardous areas.
As described in Section 2.6.2, an RS232EX isolator cable con-
nects the computer and the site. The cable supports the data
transfers between the two, and is connected to an EX Network
Cable
connected to the top of the 2150EX module.
As described in Section 2.6.3, an RS485EX isolator cable con-
nects the site with a Field Wizard or other network device. The
cable supports the data transfers between the two, and is con-
nected to an EX Network Cable, connected to the top of the
2150EX module.
In permanent installations (Figure 2-3), the 2150EX is connected
via a network interface cable, usually through conduit, to the
2194EX network module , located in the safe area, which
serves as both power supply and network or PC connection.
The AV2150EX sensor cable must be routed carefully without
kinks, coils, or sharp bends, but may be snake-looped and tied.
Any excess cable must be kept out of the channel to prevent
debris from collecting.
The Mounting Ring holds the AV2150EX sensor in place.
The AV2150EX sensor is positioned in the flow stream to
measure liquid level and velocity.