Yokogawa EJX210B Manual do Utilizador descarregar pdf (Página 10)

100

101

<2. Handling Cautions>

2-2

IM 01C27C01-01EN

2.4 Selecting the Installation

Location

The transmitter is designed to withstand severe

environmental conditions. However, to ensure

that it will provide years of stable and accurate

performance, take the following precautions when

selecting the installation location.

(a) Wireless Communication

NOTE

The installation location of this transmitter must

meet the following conditions:

- Adjust the direction of the antenna to be

in the upright position regardless of the

orientation of this transmitter. See section 4

for adjusting the antenna.

- Install the transmitter at least 1.5m above

the ground or oor.

F0203.ai

at least

1.5m

- Ensure that there are no obstacles such as

walls or pipes within a 30-cm radius of each

antenna.

- Conrm that each eld wireless equipment

compliant with ISA100.11a can see the

antenna of other devices which locate within

its own communication range. In the star

topology network, the visibility to the antenna

of gateway is a mandatory clause.

(b) Ambient Temperature

Avoid locations subject to wide temperature

variations or a signicant temperature gradient.

If the location is exposed to radiant heat from

plant equipment, provide adequate thermal

insulation and/or ventilation.

Do not install the transmitter in a corrosive

atmosphere. If this cannot be avoided, there

must be adequate ventilation.

(d) Shock and Vibration

Although the transmitter is designed to be

relatively resistant to shock and vibration, an

installation site should be selected where this is

kept to a minimum.

(e) Installation of Explosion-protected Transmitters

An explosion-protected transmitters is

certied for installation in a hazardous area

containing specic gas types. See subsection

2.8 “Installation of an Explosion-Protected

Transmitters.”

2.5 Pressure Connection

WARNING

• Never loosen the process connector bolts

and ange bolts when an instrument is

installed in a process. The device is under

pressure, and a loss of seal can result in a

sudden and uncontrolled release of process

uid.

• When draining toxic process uids that have

condensed inside the pressure detector,

take appropriate steps to prevent the contact

of such uids with the skin or eyes and the

inhalation of vapors from these uids.

The following precautions must be observed

in order to safely operate the transmitter under

pressure.

(a) Make sure that all the process connector bolts

are tightened rmly.

(b) Make sure that there are no leaks in the impulse

piping.

specied maximum working pressure.

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