Yokogawa YTA320 Manual do Utilizador descarregar pdf (Página 16)

<2. Notes on Handling>

2-10

IM 01C50B01-01E

• For the sensor input circuitry, these non-

incendive parameters must be taken into

account when installed.

• Installation Requirements between temperature

transmitter and general purpose equipment:

Voc ≤ Vmax, Isc ≤ Imax, Ca ≥ Ci + Ccable, La ≥

Li + Lcable

Voc , Isc, Ca and La are non-incendive

eld wiring parameters of general purpose

equipment.

Note 3. Installation

• The general purpose equipment must be FM

approved which have non-incendive eld wiring

parameters.

• Installation should be in accordance with ANSI/

ISA RP12.6 “Installation of Intrinsically Safe

Systems for Hazardous (Classied) Locations”

and the National Electric Code (ANSI/NFPA

70).

• Non-incendive sensor must be FMRC

Approved or be simple apparatus (a device

which will neither generate nor store more than

1.2 V, 0.1 A, 25 mW or 20 μJ, ex. switches,

thermocouples, LED’s or RTD’s).

• Dust-tight conduit seal must be used when

installed in a Class II and III environments.

Note 4. Maintenance and Repair

• The instrument modication or parts

replacement by other than authorized

representative of Yokogawa Electric

Corporation is prohibited and will void Factory

Mutual Intrinsically safe and Nonincendive

Approval.

F0210.ai

Temperature

Transmitter

General

Purpose

Equipment

+

–

C

Supply

1

2

3

4

5

Sensor

Non-incendive

Sensor

or Simple

Apparatus

Class I, II, Division 2,

Groups A, B, C, D, E, F and G

Class III, Division 1.

Hazardous

Location

Nonhazardous

Location

+

–

[Nonincendive]

c) FM Explosionproof Type

Caution for FM Explosionproof type

Note 1. Model YTA /FU1 and YTA /FF1 temperature

transmitters are applicable for use in hazardous

locations:

• Applicable Standard: FM 3600, FM 3615,

FM 3810, NEMA-250

• Explosionproof for Class I, Division 1, Groups

A, B, C, and D.

• Dust-ignitionproof for Class II/III, Division 1,

Groups E, F and G.

• Enclosure rating: NEMA 4X.

• Temperature Class: T6

• Ambient Temperature: –40 to 60°C

• Supply Voltage: 42 V dc max.

• Output signal: 4 to 20 mA

Note 2. Wiring

• All wiring shall comply with National Electrical

Code ANSI/NEPA70 and Local Electrical

Codes.

• “FACTORY SEALED, CONDUIT SEAL NOT

REQUIRED”.

Note 3. Operation

• Keep strictly the “WARNING” on the nameplate

attached on the transmitter.

WA

RNING: OPEN CIRCUIT BEFORE

REMOVING COVER. “FACTORY

SEALED, CONDUIT SEAL

NOT REQUIRED”. INSTALL

IN ACCORDANCE WITH THE

INSTRUCTION MANUAL IM

1C50B1.

• Take care not to generate mechanical spark

when access to the instrument and peripheral

devices in hazardous location.

Note 4. Maintenance and Repair

• The instrument modication or parts

replacement by other than authorized

representative of Yokogawa Electric

Corporation is prohibited and will void Factory

Mutual Explosionproof Approval.

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