YOKOGAWA YTA50 User Manual

User’s
Manual

6th Edition : Feb. 2007 (YK)
All Rights Reserved, Copyright © 1998, Yokogawa Electric Corporation

YTA50
Temperature Transmitter

IM 01C50C01-01E

6th Edition

YOKOGAWA ELECTRIC CORPORATION

Headquarters

2-9-32, Nakacho, Musashino-shi, Tokyo, 180-8750 JAPAN

Branch Sales Offices

Nagoya, Osaka, Hiroshima, Fukuoka, Sapporo, Sendai, Ichihara, Toyoda,
Kanazawa, Takamatsu, Okayama, and Kitakyusyu.

YOKOGAWA CORPORATION OF AMERICA

Headquarters

2 Dart Road, Newnan, Georgia 30265-1094, U.S.A.
Phone : [phone] Fax : [phone]

YOKOGAWA EUROPE B. V.

Headquarters

Databankweg 20 Amersfoort 3821 AL, THE NETHERLANDS
Phone : [phone] Fax : [phone]
Branch Sales Offices / Wien (Austria), Zaventem (Belgium), Ratingen (Germany),
Madrid (Spain), Runcorn (United Kingdom), Milano (Italy), Velizy Villacoublay (France),
Roodeport (Republic of South Africa), Budapest (Hungary), Stockholm (Sweden)

YOKOGAWA AMERICA DO SUL Ltda.

Head Office

Praca Acapulco, 31 - Santo Amaro. Sao Paulo/SP - BRAZIL
Phone : [phone] Fax : [phone]

YOKOGAWA ELECTRIC ASIA PTE. LTD.

Head Office

5 Bedok South Road, 469270 SINGAPORE
Phone : [phone] Fax : [phone]

YOKOGAWA ELECTRIC KOREA CO., LTD.

Head Office

14-1, Yangpyongdong-4Ga, Youngdeungpo-Gu, Seoul, 150-866 KOREA
Phone : [phone] Fax : [phone]

YOKOGAWA AUSTRALIA PTY. LTD.

Head Office (Sydney)

Tower A, 112-118 Talavera Road, Macquarie Park, N.S.W.2113, AUSTRALIA
Phone : [phone] Fax : [phone]

YOKOGAWA INDIA LTD.

Head Office

Plot No.96 Electronic City Complex, Hosur Road, Bangalore 560100, INDIA
Phone : [phone] Fax : [phone]

YOKOGAWA CHINA CO., LTD.

K. Wah Centre 29F, 1010 Huai Hai Zhong Rd., Shanghai 200031, CHINA
Phone : [phone] Fax : [phone]

Nov. '06

SAFETY INSTRUCTIONS

Ex installation:

For a safe installation of YTA50 in hazardous area the following

must be observed. The module must only be installed by
qualified personnel who are familiar with the national and
international laws, directives and standards that apply to
this area.

Year of manufacture can be taken from the first two digits in the

serial number.

The sensor circuit is not infallibly galvanically isolated from the

input circuit. However, the galvanic isolation between the
circuits is capable of withstanding a test voltage of 500 Vac
during 1 minute.

The transmitter must be mounted in an enclosure in order to

provide a degree of ingress protection of at least IP20.

In explosive atmospheres caused by air / dust mixtures:

The transmitter may only be installed in a potentially explosive

atmosphere caused by the presence of combustible dust
when mounted in a metal enclosure form B according to
DIN 43729 that is providing a degree of ingress protection
of at least IP 6X in accordance with EN 60529, that is
suitable for the application and is correctly installed.

Cable entries and blanking elements shall be used that are

suitable for the application and correctly installed.

For an ambient temperature ≥60°C, heat resistant cables shall

be used with a rating of at least 20 K above the ambient
temperature.

Special Conditions for Safe Use:

If the enclosure in which the transmitter is mounted is made of

aluminium and installed in Zone 0, 1 or Zone 20, 21 or 22 it
shall not contain by weight more than 6% in total of
magnesium and titanium.

The additional enclosure of the apparatus shall be designed

and/or installed in such a way that, even in the event of rare
incidents, ignition sources due to impact and friction sparks
are excluded.

The YTA50 is a head mount type of temperature transmitter that
accepts thermocouple or RTD input and converts it to a 4 to 20
mA DC signal for transmission. The YTA50 conforms to the
standard DIN form B head mounting.
It is imperative that usres observe the instructions in this
manual to ensure the protection and safety of operators.

1. MODEL AND SUFFIX CODES

Model

Suffix code Descriptions

..................

YTA50

Output
Signal

-A

.............

Optional
Specifications

Te mperature Transmitter (Head Mount Type)

4 to 20 mA DC

CENELEC ATEX intrinsically

/KS2

safe approval

EEx ia llC T1-6
Amb. Temperature
T1-4: -40 to 85°C
T5-6: -40 to 60°C

CENELEC ATEX/FM intrinsically

/DS2

safe approval combination

CENELEC:
EEx ia llC T1-6
FM: IS Class I, Div.1,
Groups A, B, C & D

T01E.EPS

2. WARRANTY

The warranty period of the instrument is as of condition shown
when purchasing. Any trouble arising during the warranty period
shall be replaced at free of charge.
The following problems or troubles shall not be eligible of
charge-exempt repair.

• Caused by improper usage or storage of the customer which
exceeds the specification requirements.

• Caused by mishandling or modification.

• Caused by fire, earthquake or other acts of God that are not
directly a result of problems of the instrument.

3. HANDLING PRECAUTIONS

(1) Read this manual thorughly and carefully before handling

the instruments. Observe the instructions.

(2) Store the product in location that meets the following

requirements.

• No exposure to rain or water

• No major mechanical vibration or shock

• Humidity and Temperature limitations

• Ordinary conditions(25°C, 65%) is preferable.
Otherwise, as of specified in “Standard Specifications.”

(3) Avoid corrosive atmosphere for storage and installation.
(4) For safe installation of the transmitter in hazardous area,

the following must be observed. The module must only be
installed by qualified personnels who are familiar with the
national and international laws, directives, and standards
that apply to this area.

(5) Yokogawa will not be liable for malfunctions or damage

resulting from any modification made to this instrument by
the customer.

4. STANDARD SPECIFICATIONS

Accuracy

See table in the right.

Cold Junction Compensation Accuracy(For T/C only)

±1°C(±1.8°F)

Ambient Temperature Effects (per 10°C Change)

See table in the right

Type

T/C

B
E
J
K
N
R
S
T
L
U
W3
W5
Pt100

RTD

Ni100
DC Voltage [mV]
Resistance [⍀]

Standard

IEC584

DIN43710

ASTM E988-90

IEC751

DIN43760

Input

ranges °C

400 to 1820

-100 to 1000

-100 to 1200

-180 to 1372

-180 to 1300

-50 to 1760

-50 to 1760

-200 to 400

-100 to 900

-200 to 600
0 to 2300
0 to 2300

-200 to 850

-60 to 250

-10 to 800 mV
0 to 5000⍀

Minimum

span °C

200

50
50

50
100
200
200

50

50

75
200
200

25

25

5 mV

30⍀

Accuracy *

±0.1% or ±2.0°C

±0.1% or ±1.0°C

±0.1% or ±2.0°C

±0.1% or ±1.0°C

±0.1% or ±2.0°C

±0.1% or ±0.2°C

±0.1% or ±0.01mV
±0.1% or ±0.1⍀

1

±0.1% or ±2.0°C

±0.1% or ±0.5°C

±0.1% or ±2.0°C

±0.1% or ±0.5°C

±0.1% or ±2.0°C

±0.1% or ±0.1°C

±0.1% or ±10␮V
±0.1% or ±0.1⍀

Temperature

effect *

*1 : The value whichever is greater. value in % indicates the

% of span.

Power Supply Effects

±0.005% of FS per Volt

RFI Effects

Tested per EN 61326, field intensity up to 10 V/m.

EMC Conformity

EN 61326

Maximum Zero Offset

±50% of the maximum temperature

1

T02E.EPS

Input Signal Source Resistance (for T/C input)

10 MΩ, or 3 kΩ at power-off

Input Lead Wire Resistance (for RTD input)

5 Ω per wire or lower

Burnout

High (21.6 mA or more) or Low (3.6 mA or less)

Output

Two wire 4 to 20 mA DC

Response Time

1 to 60 sec (as specified upon shipment)

Ambient Temperature Limits (Option code may affect limit.)

–40 to 85°C (–40 to 185°F)

Ambient Humidity Limits

5 to 90% RH at 40°C (104°F)

Supply Voltage

7 to 35 V DC
7 to 30 V DC for Intrinsically safe type

Load Resistance (Limitation)

0 to (E–7)/0.023 [Ω], where E is power supply voltage.
Ex. 739 Ω max. @ 24 V DC

Isolation

Input/output isolated to 1500 V AC.

Mounting

DIN form B head mounting

Terminals

M3 screws

Weight

50 g(0.11 lb)