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SITRANS TF, FIELD TRANSMITTER/FIELD INDICATOR Overview

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SITRANS TF là dòng bộ truyền tín hiệu và bộ chỉ thị đo nhiệt độ của Siemens, được sử dụng để đo và hiển thị nhiệt độ trong các quy trình công nghiệp và ứng dụng đo lường.

Dưới đây là một số điểm nổi bật về SITRANS TF (Field Transmitter/Field Indicator) của Siemens:

  1. Đo nhiệt độ đáng tin cậy: SITRANS TF sử dụng các cảm biến nhiệt độ cao cấp để đo nhiệt độ đáng tin cậy và chính xác trong các môi trường công nghiệp khắc nghiệt.

  2. Nhiều loại cảm biến: Dòng sản phẩm SITRANS TF hỗ trợ nhiều loại cảm biến nhiệt độ, bao gồm RTD và thermocouple, giúp đáp ứng các yêu cầu đa dạng của các ứng dụng khác nhau.

  3. Tùy chọn đầu ra tín hiệu: SITRANS TF có nhiều tùy chọn đầu ra tín hiệu, bao gồm 4-20mA, HART, PROFIBUS PA và FOUNDATION Fieldbus, giúp dễ dàng tích hợp vào hệ thống điều khiển và giám sát.

  4. Thiết kế bền bỉ: SITRANS TF được thiết kế để hoạt động ổn định và đáng tin cậy trong môi trường công nghiệp khắc nghiệt, với khả năng chống rung động, chịu nhiệt độ cao và chịu va đập.

  5. Hiển thị đơn giản: SITRANS TF có màn hình hiển thị đơn giản và dễ sử dụng, cho phép người dùng dễ dàng đọc và xác nhận giá trị nhiệt độ đo được.

  6. Cấu hình linh hoạt: Bộ truyền tín hiệu SITRANS TF có khả năng cấu hình linh hoạt, cho phép người dùng tuỳ chỉnh các thiết lập và hiệu chuẩn dễ dàng.

  7. Ứng dụng đa dạng: SITRANS TF có thể được sử dụng trong nhiều ngành công nghiệp và ứng dụng, bao gồm hóa chất, dầu khí, thực phẩm và đồ uống, và các quy trình đo lường nhiệt độ khác.

  8. Tiết kiệm chi phí: SITRANS TF giúp cải thiện hiệu suất và độ tin cậy của quy trình, giảm thiểu thời gian dừng máy và chi phí bảo trì.

Tóm lại, SITRANS TF (Field Transmitter/Field Indicator) của Siemens là dòng sản phẩm đáng tin cậy và chất lượng cao để đo và hiển thị nhiệt độ trong các quy trình công nghiệp và đo lường. Với tính linh hoạt và khả năng tích hợp, dòng sản phẩm này là lựa chọn phổ biến trong nhiều ứng dụng công nghiệp khác nhau.

Số lượng:

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Overview

Our field devices for heavy industrial use
  • HART, Universal
  • 4 to 20 mA, universal

The temperature transmitter SITRANS TF works where others feel uncomfortable.

Benefits

  • Universal use
    • as transmitter for resistance thermometer, thermocouple element, Ω or mV signal
    • as field indicator for any 4 to 20 mA signals
  • Local sensing of measured values over digital display
  • Rugged two-chamber enclosure in die-cast aluminum or stainless steel
  • IP66/67/68 degree of protection
  • Test terminals for direct read-out of the output signal without breaking the current loop
  • Can be mounted elsewhere if the measuring point
    • is difficult to access
    • has high temperatures
    • experiences vibrations due to the process cell
    • is to avoid long neck pipes and thermowells
  • Can be mounted directly on American-design sensors
  • Wide range of approvals for use in potentially explosive atmospheres. Types of protection "Intrinsically safe, non-sparking and flameproof", for Europe and the USA.
  • SIL2 (with order note C20), SIL2/3 (with C23)

Application

SITRANS TF can be used everywhere where temperatures need to be measured under particularly adverse conditions, or where a convenient local display is ideal. Which is why users from all industries have opted for this field device. The rugged enclosure protects the electronics. The stainless steel model is almost completely resistant to sea water and other aggressive substances. The inner workings offer high measuring accuracy, universal input and a wide range of diagnostic options.

Function

Configuration

The communication capability over the HART protocol V 5.9 of the SITRANS TF with an integrated SITRANS TH300 permits parameterization using a PC or HART communicator (hand-held communicator). The SIMATIC PDM makes it easy.

For the SITRANS TF with integrated programmable SITRANS TH200, parameters are assigned with the PC. Available for this purpose are a special modem and the software tool SIPROM T.

Mode of operation

Mode of operation of SITRANS TF as temperature transmitter

The sensor signal, whether resistance thermometer, thermocouple element or Ω or mV signal, is amplified and linearized. Sensor and output side are electrically isolated. An internal cold junction is integrated for measurements with thermocouples.

The device outputs a temperature-linear direct current from 4 to 20 mA. As well as the analog transmission of measured values from 4 to 20 mA, the HART version also supports digital communication for online diagnostics, measured value transmission and configuration.

SITRANS TF automatically detects when a sensor should be interrupted or is indicating a short-circuit. The practical test terminals allow direct measurement of 4 to 20 mA signals over an ammeter without interrupting the output current loop.

Mode of operation of SITRANS TF with integrated SITRANS TH300 and digital display

Technical specifications

SITRANS TF, field transmitter

Input

 

 

Resistance thermometer

 

 

Measured variable

Temperature

Input type

 

 

  • According to IEC 60751

Pt25 … Pt1000

  • According to JIS C 1604; a=0.00392 K-1

Pt25 … Pt1000

  • According to IEC 60751

Ni25 … Ni1000

Units

°C and °F

Connection

 

 

  • Standard connection

1 resistance thermometer (RTD) in 2-wire, 3-wire or 4-wire connection

  • Averaging

Series or parallel connection of several resistance thermometers in the 2-wire connection for the generation of average temperatures or for adaptation to other device types

  • Differentiation

2 resistance thermometers (RTD) in 2-wire connection (RTD 1 – RTD 2 or RTD 2 – RTD 1)

Connection

 

 

  • 2-wire connection

Wire resistance can be configured ≤100 Ω (loop resistance)

  • 3-wire connection

No trim necessary

  • 4-wire connection

No trim necessary

Sensor current

≤ 0.45 mA

Response time

≤ 250 ms for 1 sensor with break monitoring

Break monitoring

Always active (cannot be switched off)

Short-circuit monitoring

Can be switched on/off (default value: ON)

Measuring range

Assignable (see "Digital measuring error" table)

Min. measuring span

10 °C (18 °F)

Characteristic curve

Temperature-linear or special characteristic curve

Resistance-based sensor

 

 

Measured variable

Ohmic resistance

Sensor type

Resistance-based, potentiometers

Units

Ω

Connection

 

 

  • Standard connection

1 resistance-based sensor (R) in 2-wire, 3-wire or 4-wire connection

  • Averaging

2 resistance-based sensors in 2-wire connection for averaging

  • Differentiation

2 resistance-based sensors in 2-wire connection (R 1 – R 2 or R 2 – R 1)

Connection

 

 

  • 2-wire connection

Wire resistance can be configured ≤100 Ω (loop resistance)

  • 3-wire connection

No trim necessary

  • 4-wire connection

No trim necessary

Sensor current

≤ 0.45 mA

Response time

≤ 250 ms for 1 sensor with break monitoring

Break monitoring

Can be switched off

Short-circuit monitoring

Can be switched off (value is adjustable)

Measuring range

Assignable max. 0 ... 2200 Ω (see "Digital measuring error" table)

Min. measuring span

5 ... 25 Ω (see "Digital measuring error" table)

Characteristic curve

Resistance-linear or special characteristic curve

Thermocouples

 

 

Measured variable

Temperature

Sensor type (thermocouples)

 

 

  • Type B

Pt30Rh-Pt6Rh acc. to IEC 584

  • Type C

W5%-Re acc. to ASTM 988

  • Type D

W3%-Re acc. to ASTM 988

  • Type E

NiCr-CuNi acc. to IEC 584

  • Type J

Fe-CuNi acc. to IEC 584

  • Type K

NiCr-Ni acc. to IEC 584

  • Type L

Fe-CuNi acc. to DIN 43710

  • Type N

NiCrSi-NiSi acc. to IEC 584

  • Type R

Pt13Rh-Pt acc. to IEC 584

  • Type S

Pt10Rh-Pt acc. to IEC 584

  • Type T

Cu-CuNi acc. to IEC 584

  • Type U

Cu-CuNi acc. to DIN 43710

Units

°C or °F

Connection

 

 

  • Standard connection

1 thermocouple (TC)

  • Averaging

2 thermocouples (TC)

  • Differentiation

2 thermocouples (TC) (TC 1 – TC 2 or TC 2 – TC 1)

Response time

≤ 250 ms for 1 sensor with break monitoring

Break monitoring

Can be switched off

Cold junction compensation

 

 

  • Internal

With integrated Pt100 resistance thermometer

  • External

With external Pt100 IEC 60751 (2-wire or 3-wire connection)

  • External fixed

Reference junction temperature can be set as fixed value

Measuring range

Assignable (see "Digital measuring error" table)

Min. measuring span

Min. 40 ... 100 °C (72 ... 180 °F) (see "Digital measuring error" table)

Characteristic curve

Temperature-linear or special characteristic curve

mV sensor

 

 

Measured variable

DC voltage

Sensor type

DC voltage source (DC voltage source possible over externally connected resistance)

Units

mV

Response time

≤ 250 ms for 1 sensor with break monitoring

Break monitoring

Can be switched off

Measuring range

  • -10 ... +70 mV
  • -100 ... +1100 mV

Min. measuring span

2 mV or 20 mV

Overload capability of the input

-1.5 ... +3.5 V DC

Input resistance

≥ 1 MΩ

Characteristic curve

Voltage-linear or special characteristic curve

Output

 

 

Output signal

4 ... 20 mA, 2-wire

Communication with SITRANS TH300

According to HART Rev. 5.9

Digital display

 

 

Digital indicator (optional)

In current loop

Display

Max. 5 digits

Digit height

9 mm (0.35")

Display range

-99 999 ... +99 999

Units

Any (max. 5 char.)

Setting:

Zero point, full-scale value and unit

Using 3 buttons

Load voltage

2.1 V

Measuring accuracy

 

 

Digital measuring error

See "Digital measuring error" table

Reference conditions

 

 

  • Auxiliary power

24 V ± 1%

  • Load

500 Ω

  • Ambient temperature

23 °C (73.4 °F)

  • Warming-up time

> 5 min

Error in the analog output (digital/analog converter)

< 0.025% of measuring span

Error due to internal reference junction

< 0.5 °C (0.9 °F)

Effect of ambient temperature

 

 

  • Analog measuring error

0.02% of measuring span/10 °C (18 °F)

  • Digital measuring error
 

 

  • With resistance thermometers

0.06 °C (0.11 °F)/10 °C (18 °F)

  • With thermocouples

0.6 °C (1.1 °F)/10 °C (18 °F)

Auxiliary power effect

< 0.001% of measuring span/V

Effect of load impedance

< 0.002% of meas. span/100 Ω

Long-term drift

 

 

  • In the first month

< 0.02% of measuring span

  • After one year

< 0.2% of measuring span

  • After 5 years

< 0.3% of measuring span

Rated conditions

 

 

Ambient conditions

 

 

Ambient temperature

-40 ... +85 °C (-40 ... +185 °F)

Condensation

Permissible

Electromagnetic compatibility

According to EN 61326 and NAMUR NE21

Degree of protection acc. to EN 60529

IP66/67/68

Structural design

 

 

Weight

Approx. 1.5 kg (3.3 lb) without options

Dimensions

See "Dimensional drawings"

Enclosure material

Die-cast aluminum, low in copper, GD‑AlSi 12 or stainless steel, polyester-based lacquer, stainless steel nameplate

Electrical connection, sensor connection

Screw terminals, cable entry via M20 x 1.5 or ½-14 NPT screw gland

Mounting bracket (optional)

Steel, zinc-plated and chrome-plated or stainless steel

Auxiliary power

 

 

Without digital indicator

11 ... 35 V DC (30 V with Ex ib; 32 V with Ex ic and Ex nA)

With digital indicator

13.1 ... 35 V DC (30 V with Ex ib; 32 V with Ex ic and Ex nA)

Galvanic isolation

Between input and output

  • Test voltage

U rms = 1 kV, 50 Hz, 1 min

Certificates and approvals

 

 

ATEX explosion protection

 

 

  • "Intrinsic safety" type of protection

With digital indicator:

  • II 2 (1) G Ex ib [ia Ga] IIC T4 Gb
  • II 2 G Ex ib IIC T4 Gb
  • II 2 D Ex ia IIIC T100°C Db

Without digital indicator:

  • II 2 (1) G Ex ib [ia Ga] IIC T6 Gb
  • II 2 G Ex ib IIC T6 Gb
  • II 2 D Ex ia IIIC T100°C Db
  • EC type-examination certificate

ZELM 11 ATEX 0471 X

  • "Non-sparking and energy-limited equipment for Zone 2" type of protection
  • II 3 G Ex ic IIC T6/T4 Gc
  • II 3 G Ex nA IIC T6/T4 Gc
  • II 3 G Ex nA [ic] IIC T6/T4 Gc
  • EC type-examination certificate

ZELM 11 ATEX 0471 X

  • "Flameproof enclosure" type of protection
  • II 2 G Ex d IIC T6/T5 Gb
  • II 2 D Ex tb IIIC T100 °C Db
  • EC type-examination certificate

ZELM 11 ATEX 0472 X

Explosion protection acc. to FM

Certificate of Compliance 3017742

  • Identification (XP, DIP, NI, S)
  • XP/I/1/BCD/T5 Ta = 85 °C (185 °F), T6 Ta = 60 °C (140 °F), Type 4X
 

 

  • DIP/II, III/1/EFG/T5 Ta = 85 °C (185 °F), T6 Ta = 60 °C (140 °F), Type 4X
 

 

  • NI/I/2/ABCD/T5 Ta = 85 °C (185 °F), T6 Ta = 60 °C (140 °F), Type 4X
 

 

  • S/II, III/2/FG/T5 Ta = 85 °C (185 °F), T6 Ta = 60 °C (140 °F), Type 4X

Other certificates

EAC Ex, NEPSI, KOSHA

Hardware and software requirements

 

 

  • For the SIPROM T parameterization software for SITRANS TF with TH200
 

 

  • Personal computer

PC with CD-ROM drive and USB interface

  • PC operating system

Windows 98, NT, 2000, XP, Win 7, 8 and 10

  • For the SIMATIC PDM parameterization software for SITRANS TH300

See "Digitalization and Communication" - "SIMATIC PDM"

Communication

 

 

Load for HART connection

230 ... 1100 Ω

  • Two-core shielded

≤ 3.0 km (1.86 miles)

  • Multi-core shielded

≤ 1.5 km (0.93 mile)

Protocol

HART protocol, version 5.9



Factory setting of the transmitter:

  • Pt100 (IEC 751); 3-wire connection
  • Measuring range: 0 ... 100 °C (32 ... 212 °F)
  • Fault current: 22.8 mA
  • Sensor offset: 0 °C (0 °F)
  • Damping 0.0 s
Digital measuring error

Resistance thermometer

Input

Measuring range

Minimum measuring span

Digital accuracy

 

 

°C

(°F)

°C

(°F)

°C

(°F)

According to IEC 60751

 

 

  

 

 

 

 

 

 

 

Pt25

-200 ... +850

(‑328 ... +1562)

10

(18)

0.3

(0.54)

Pt50

-200 ... +850

(‑328 ... +1562)

10

(18)

0.15

(0.27)

Pt100 ... Pt200

-200 ... +850

(‑328 ... +1562)

10

(18)

0.1

(0.18)

Pt500

-200 ... +850

(‑328 ... +1562)

10

(18)

0.15

(0.27)

Pt1000

-200 ... +350

(‑328 ... +662)

10

(18)

0.15

(0.27)

According to JIS C1604-81

 

 

  

 

 

 

 

 

 

 

Pt25

‑200 ... +649

(‑328 ... +1200)

10

(18)

0.3

(0.54)

Pt50

‑200 ... +649

(‑328 ... +1200)

10

(18)

0.15

(0.27)

Pt100 ... Pt200

-200 ... +649

(‑328 ... +1200)

10

(18)

0.1

(0.18)

Pt500

-200 ... +649

(‑328 ... +1200)

10

(18)

0.15

(0.27)

Pt1000

‑200 ... +350

(‑328 ... +662)

10

(18)

0.15

(0.27)

Ni 25 ... Ni1000

‑60 ... +250

(‑76 ... +482)

10

(18)

0.1

(0.18)



Resistance-based sensor

Input

Measuring range

Minimum measuring span

Digital accuracy

 

 

Ω

Ω

Ω

Resistance

0 ... 390

5

0.05

Resistance

0 ... 2200

25

0.25



Thermocouples

Input

Measuring range

Minimum measuring span

Digital accuracy

 

 

°C

°C (°F)

°C

(°F)

°C

(°F)

Type B

100 ... 1820

(212 ... 3308)

100

(180)

2 1)

(3.6) 1)

Type C (W5)

0 ... 2300

(32 ... 4172)

100

(180)

2

3.6

Type D (W3)

0 ... 2300

(32 ... 4172)

100

(180)

12)

(1.8)2)

Type E

-200 ... +1000

(‑328 ... +1832)

50

(90)

1

(1.8)

Type J

-200 ... +1200

(‑328 ... +2192)

50

(90)

1

(1.8)

Type K

-200 ... +1370

(‑328 ... +2498)

50

(90)

1

(1.8)

Type L

-200 ... +900

(-328 ... +1652)

50

(90)

1

(1.8)

Type N

‑200 ... +1300

(-328 ... +2372)

50

(90)

1

(1.8)

Type R

‑50 ... +1760

(-58 ... +3200)

100

(180)

2

(3.6)

Type S

‑50 ... +1760

(‑58 ... +3200)

100

(180)

2

(3.6)

Type T

-20 ... +400

(‑328 ... +752)

40

(72)

1

(1.8)

Type U

-200 ... +600

(‑328 ... +1112)

50

(90)

2

(3.6)



1) The digital accuracy in the range 100 to 300 °C (212 to 572 °F) is 3 °C (5.4 °F).

2) The digital accuracy in the range 1750 to 2300 °C (3182 to 4172 °F) is 2 °C (3.6 °F).

mV sensor

Input

Measuring span

Minimum measuring span

Digital accuracy

 

 

mV

mV

μV

mV sensor

-10 ... +70

2

40

mV sensor

-100 ... +1100

20

400



The digital accuracy is the accuracy after the analog/digital conversion including linearization and calculation of the measured value.

An additional error is generated in the output current 4 to 20 mA as a result of the digital/analog conversion of 0.025% of the set measuring span (digital-analog error).

The total error under reference conditions at the analog output is the sum from the digital error and the digital-analog error (poss. with the addition of reference junction errors in the case of thermocouple measurements).

Dimensional drawings

SITRANS TF, dimensions in mm (inch)

Circuit diagrams

SITRANS TF, sensor connection assignment

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