Emerson Rosemount 644h Manuel télécharger pdf (Page 7)

SECTION

1-1

1 Introduction

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1

Transmitter Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2

Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2

Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-3

SAFETY MESSAGES

Instructions and procedures in this section may require special precautions to

ensure the safety of the personnel performing the operations. Information that

raises potential safety issues is indicated by a warning symbol ( ). Please refer to

the following safety messages before performing an operation preceded by this

symbol.

Warnings

Explosions could result in death or serious injury.

• Do not remove the connection head cover in explosive atmospheres when the

circuit is live.

• Before connecting a HART-based communicator in an explosive atmosphere,

make sure the instruments in the loop are installed in accordance with

instrinsically safe or non-incendive field wiring practices.

• Verify that the operating atmosphere of the transmitter is consistent with the

appropriate hazardous locations certifications.

• All connection head covers must be fully engaged to meet

explosion-proof requirements.

Process leaks could result in death or serious injury.

• Install and tighten thermowells and sensors before applying pressure

• Do not remove the thermowell while in operation.

Electrical shock could cause death or serious injury.

• Use extreme caution when making contact with the leads and terminals.

• Under certain fault conditions, high voltage may be present on transmitter leads

and terminals.

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Emerson Rosemount 644h Manuel Page 7