Yokogawa YTA320 Manual de usuario descargar pdf (Pagina 13)

<2. Notes on Handling>

2-7

IM 01C50B01-01E

• Ambient Temperature for Dust Atmospheres:

–40 to 65°C (T70°C), –40 to 80°C (T90°C)

• Enclosure: IP67

Note 2. Electrical Data

• Supply voltage: 42 V dc max.

• Output signal: 4 to 20 mA

Note 3. Installation

• All wiring shall comply with local installation

requirement.

• The cable entry devices shall be of a certied

ameproof type, suitable for the conditions of

use.

Note 4. Operation

• Keep strictly the “WARNING” on the label on

the transmitter.

WARNING: AFTER DE-ENERGIZING, DELAY

5 MINUTES BEFORE OPENING.

WHEN THE AMBIENT TEMP. ≥

70°C, USE THE HEATRESISTING

CABLES OF HIGHER THAN

90°C.

• Take care not to generate mechanical spark

when access to the instrument and peripheral

devices in hazardous location.

Note 5. Maintenance and Repair

• The instrument modication or parts

replacement by other than authorized

representative of Yokogawa Electric

Corporation is prohibited and will void ATEX

Flameproof Certication.

c) ATEX Intrinsically Safe “ic”

WARNING

When using a power supply not having a non-

incendive circuit, please pay attention not to

ignite in the surrounding ammable atmosphere.

In such a case, we recommend using wiring

metal conduit in order to prevent the ignition.

Caution for ATEX Intrinsically Safe “ic”

Note 1. Model YTA110/KU2, YTA310/KU2 and

YTA320/KU2 temperature transmitters for

potentially explosive atmospheres:

• Ap

plicable standard: EN 60079-0:2009,

EN 60079-0:2012, EN 60079-11:2012

• Type of Protection and Marking:

II 3 G Ex ic IIC T5…T4 Gc

• Ambient Temperature: –30 to 50°C for T5,

–30 to 70°C for T4

• IP Code: IP67

• Overvoltage Category: I

Note 2. Electrical Data

• [S

upply circuit]

Ui = 30 V

Effective internal capacitance, Ci = 28 nF

Effective internal inductance, Li = 730 μH

• [Sensor circuit]

Uo= 9 V Io = 40 mA Po = 90 mW

Max. allowed external capacitance, Co = 0.7 μF

Max. allowed external inductance, Lo = 10 mH

• The above parameters apply when one of the

two conditions below is given:

- the total Li of the external circuit (excluding

the cable) is < 1% of the Lo value or

- the total Ci of the external circuit (excluding

the cable) is < 1% of the Co value.

• The above parameters are reduced to 50%

when both of the two conditions below are

given:

- the total Li of the external circuit (excluding

the cable) is ≥ 1% of the Lo value and

- the total Ci of the external circuit (excluding

the cable) is ≥ 1% of the Co value.

• The reduced capacitance of the external circuit

(including cable) shall not be greater than 1μF

for Group IIB and 600nF for Group IIC.

Note 3. Installation

• All wiring shall comply with local installation

requirements. (refer to the installation diagram)

• Cable glands, adapters and/or blanking

elements shall be of Ex “n”, Ex “e” or Ex “d” and

shall be installed so as to maintain the specied

degree of protection (IP code) of the equipment.

Note 4. Operation

• Keep strictly the “WARNING” on the label on

the transmitter.

WARNING: POTENTIAL ELECTROSTATIC

CHARGING HAZARD - SEE USER’S MANUAL

Note 5. Maintenance and Repair

• The instrument modication or parts

replacement by other than authorized

representative of Yokogawa Electric

Corporation is prohibited and will void ATEX

Intrinsically Safe “ic“.

Note 6. Specic Conditions of Use

• Precautions shall be taken to minimize the risk

from electrostatic discharge of painted parts.

• The dielectric strength of at least 500 V a.c.

r.m.s between the intrinsically safe circuits

and the enclosure of the Model YTA series

temperature transmitter is limited only by the

overvoltage protection.

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