Endress+Hauser ITEMP TMT85 Manuale utente

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TI00134R/09/EN

71209219

Technical Information

iTEMP®TMT85

Dual Input Temperature Transmitter

with FOUNDATION Fieldbus™ communication

Application

• Temperature transmitter with 2 universal input channels and

FOUNDATION Fieldbus™ protocol for the conversion of

different input signals into digital output signals

•TheiTEMP

®TMT85 stands out due to signal reliability, long-

term stability, high precision and advanced diagnostics

(important in critical processes)

• For the highest level of safety, availability and risk reduction

• Universal input usable for resistance thermometer (RTD),

thermocouple (TC), resistance transmitter (Ω), voltage

transmitter (mV)

• DIN B style transmitter to fit in the smallest terminal heads or

in remote housings in accordance with DIN EN 50446

• Optional installation in field housings even for use in

Ex d areas

• Mounting bracket pipe or wall for the field housing

Your benefits

• Easy and standardized communication via FOUNDATION

Fieldbus™ H1

• Straightforward design of measuring points in Ex-areas

through FISCO/FNICO conformity in accordance with

IEC 600079-27

• Safe operation in hazardous areas thanks to international

approvals such as FM IS, NI; CSA IS, NI; ATEX Ex ia, Ex nA

for intrinsically safe installation in zone 1 and zone 2

• High accuracy through sensor-transmitter matching

• Reliable operation with sensor monitoring and device

hardware fault recognition

•Severalmountingversions and sensor connection

combinations

• Rapid no-tools wiring due to optional spring terminal

technology

TMT85

2Endress+Hauser

Function and system design

Measuring principle Electronic recording and conversion of various input signals in industrial temperature measurement.

Measuring system

A0007667

Application examples

Two sensors with measuring input (RTD or TC) in remote installation with the following advantages: drift warning,

sensor backup function and temperature-dependent switching

Built-in head transmitter - 1 x RTD/TC or 2 x RTD/TC as redundancy

Endress+Hauser is a producer of a wide range of resistance thermometers, thermocouples and

matching thermowells.

In conjunction with these components, the temperature head transmitter forms a complete measuring

point for various applications in the industrial sector.

Device architecture

A0007668-EN

System integration via FOUNDATION Fieldbus™

RTD/TC 1 x RTD/TC /

2 x RTD/TC

RTD/TC

0- 10 bar 0- 10 bar

Visualisation and monitoring

e. g. P View, FieldCare

and diagnostic software

High speed Ethernet

(HSE) 100 Mbit/s

32 devices per segment

Field controller

linking

device

ENDRESS+ HAUSER ENDRESS+ HAUSER

linking

device

linking

device

31.25 kbit/s

H1 IEC 61158-2 H1 FISCO

Measuring point with

installed TMT85

Measuring point with

installed TMT85

TMT85

Endress+Hauser 3

The temperature head transmitter is a two-wire device with two measuring inputs. Using

FOUNDATION Fieldbus™, the device transfers converted signals from resistance thermometers and

thermocouples in addition to other resistance and millivolt signals. The device is powered via the

FOUNDATION Fieldbus™ H1 bus and can be installed as an intrinsically safe apparatus in zone 1

hazardous areas. The device is used for instrumentation purposes in the terminal head form B as per

DIN EN 50446. Data transfer takes place via the following function blocks:

• 2 x 3 analog input (AI),

• 1 x standard PID controller (PID) and

• 1 x input selector (ISEL).

Sensor diagnosis functions

Sensor diagnoses such as cable open circuit, short-circuit, cable corrosion, wiring error and device

hardware error are supported. In addition, the work area of the sensor and the ambient temperature

are monitored.

2-channel functions

These functions increase the reliability and availability of the process values:

• Sensor backup switches to the second sensor if the primary sensor fails.

• Drift warning or alarm if the deviation between sensor 1 and sensor 2 is less than or greater than a

predefined limit value.

• Temperature-dependent switching between sensors which have advantages in different ranges.

Input

Measured variable Temperature (temperature linear transmission behavior), resistance and voltage.

Measuring range The transmitter records different measuring ranges depending on the sensor connection and input

signals (see "Type of input").

Type of input It is possible to connect two sensors which are independent of each other. The measuring inputs are

not galvanically isolated from each other.

Type of input Designation Measuring range limits Min.

span

Resistance

thermometer (RTD)

as per IEC 60751

(α= 0.00385)

as per JIS C1604-81

(α= 0.003916)

as per DIN 43760

(α= 0.006180)

as per Edison Copper

Winding No.15 (α=

0.004274)

as per Edison Curve

(α= 0.006720)

as per GOST

(α= 0.003911)

as per GOST

(α= 0.004280)

Pt100

Pt200

Pt500

Pt1000

Pt100

Ni100

Ni1000

Cu10

Ni120

Pt50

Pt100

Cu50, Cu100

Pt100 (Callendar-Van

Dusen)

Polynomial nickel

Polynomial copper

-200 to +850 °C (-328 to +1562 °F)

-200 to +250 °C (-328 to +482 °F)

-200 to +250 °C (-238 to +482 °F)

-200 to +649 °C (-328 to +1200 °F)

-60 to +250 °C (-76 to +482 °F)

-60 to +150 °C (-76 to +302 °F)

-100 to +260 °C (-148 to +500 °F)

-70 to +270 °C (-94 to +518 °F)

-200 to +1100 °C (-328 to +2012 °F)

-200 to +850 °C (-328 to +1562 °F)

-200 to +200 °C (-328 to +392 °F)

10 to 400 Ω

10 to 2000 Ω

10 to 400 Ω

10 to 2000 Ω

10 to 400 Ω

10 to 2000 Ω

10 K

10 Ω

100 Ω

10 Ω

100 Ω

10 Ω

100 Ω

TMT85

4Endress+Hauser

When assigning both sensor inputs, the following connection combinations are possible:

• Connection type: 2-wire, 3-wire or 4-wire connection, sensor current: ≤0.3 mA

• For 2-wire circuit, compensation for wire resistance possible (0 to 30 Ω)

• For 3-wire and 4-wire connection, sensor wire resistance up to max. 50 Ωper wire

Resistance transmitter Resistance Ω10 to 400 Ω

10 to 2000 Ω

10 Ω

100 Ω

Thermocouples (TC)

as per IEC 584, Part 1

as per ASTM E988

as per DIN 43710

Type A (W5Re-W20Re)

Type B (PtRh30-PtRh6)

Type E (NiCr-CuNi)

Type J (Fe-CuNi)

Type K (NiCr-Ni)

Type N (NiCrSi-NiSi)

Type R (PtRh13-Pt)

Type S (PtRh10-Pt)

Type T (Cu-CuNi)

Type C (W5Re-W26Re)

Type D (W3Re-W25Re)

Type L (Fe-CuNi)

Type U (Cu-CuNi)

0 to +2500 °C (+32 to +4532 °F)

+40 to +1820 °C (+104 to +3308 °F)

-270 to +1000 °C (-454 to +1832 °F)

-210 to +1200 °C (-346 to +2192 °F)

-270 to +1372 °C (-454 to +2501 °F)

-270 to +1300 °C (-454 to +2372 °F)

-50 to +1768 °C (-58 to +3214 °F)

-260 to +400 °C (-436 to +752 °F)

0 to +2315 °C (+32 to +4199 °F)

-200 to +900 °C (-328 to +1652 °F)

-200 to +600 °C (-328 to +1112 °F)

Recommended temperature range:

0 to +2000 °C (+32 to +3632 °F)

+100 to +1500 °C (+212 to +2732 °F)

0 to +750 °C (+32 to +1382 °F)

+20 to +700 °C (+68 to +1292 °F)

0 to +1100 °C (+32 to +2012 °F)

0 to +1400 °C (+32 to +2552 °F)

-185 to +350 °C (-301 to +662 °F)

0 to +2000 °C (+32 to +3632 °F)

0 to +750 °C (+32 to +1382 °F)

-185 to +400 °C (-301 to +752 °F)

50 K

• 2-wire connection

• Internal cold junction (Pt100, Class B)

• External cold junction: value adjustable from -40 to +85 °C (-40 to +185 °F)

• Maximum sensor resistance 10 kΩ(if the sensor resistance is greater than 10 kΩ, an error message is output in

accordance with NAMUR NE89)

Voltage transmitter

(mV)

Millivolt transmitter

(mV)

-20 to 100 mV 5 mV

Type of input Designation Measuring range limits Min.

span

Sensor input 1

RTD or resis-

tance transmit-

ter, 2-wire

RTD or resis-

tance transmit-

ter, 3-wire

RTD or resis-

tance transmit-

ter, 4-wire

Thermocouple

(TC), voltage

transmitter

Sensor

input 2

RTD or resistance

transmitter, 2-wire Â Â -Â

RTD or resistance

transmitter, 3-wire Â Â -Â

RTD or resistance

transmitter, 4-wire ----

Thermocouple (TC),

voltage transmitter Â Â Â Â

TMT85

Endress+Hauser 5

Output

Output signal • FOUNDATION Fieldbus™ H1, IEC 61158-2

• FDE (Fault Disconnection Electronic) = 0 mA

• Data transmission rate: supported baud rate = 31.25 kBit/s

• Signal coding = Manchester II

• Output data:

Available values via AI blocks: temperature (PV), temp sensor 1 + 2, terminal temperature

• LAS (link active scheduler), LM (link master) function is supported:

Thus, the head transmitter can assume the function of a link active scheduler (LAS) if the current

link master (LM) is no longer available. The device is supplied as a BASIC device. To use the device

as an LAS, this must be defined in the distributed control system and activated by downloading the

configuration to the device.

• In accordance with IEC 60079-27, FISCO/FNICO

Breakdown information Status message in accordance with FOUNDATION Fieldbus™ specification.

Linearization/transmission

behavior

Temperature linear, resistance linear, voltage linear

Mains voltage filter 50/60 Hz

Galvanic isolation U = 2 kV AC (sensor input to the output)

Current consumption ≤11 mA

Switch-on delay 8 s

Data of the FOUNDATION

Fieldbus interface

Basic Data

Virtual communication references (VCRs)

Link Settings

Device Type 11CE (hex)

Device Revision 02

Node address Default: 247

ITK Version 6.0.1

ITK-Certification Driver-No. IT085900

Link Master (LAS) capable yes

Link Master / Basic Device selecta-

ble

yes; Default: Basic Device

Number VCRs 44

Number of Link-Objects in VFD 50

Permanent entries 1

Fully configurable entries 43

Slot time 8

Min. Inter PDU delay 10

Max. response delay * slot time 24

TMT85

6Endress+Hauser

Blocks

Brief description of the blocks Resource Block

The Resource Block contains all the data that clearly identify and characterize the device. It is like an

electronic device nameplate. In addition to parameters that are needed to operate the device on the

fieldbus, the Resource Block also makes other information available such as the order code, device ID,

hardware version, firmware version, etc.

Transducer Block "Sensor 1" and "Sensor 2"

The Transducer Blocks of the head transmitter contain all the measurement-related and device-

specific parameters that are relevant for measuring the input variables.

Display Transducer

The parameters of the "Display" Transducer Block allow the configuration of the optional display.

Advanced Diagnostic

All the parameters for automatic monitoring and diagnosis are grouped together in this Transducer

Block.

Analog Input (AI)

In the AI function block, the process variables from the Transducer Blocks are prepared for subsequent

automation functions in the control system (e.g. scaling, limit value processing).

PID

This function block contains input channel processing, proportional integral-differential control (PID)

and analog output channel processing. The following can be implemented: basic controls, feedforward

control, cascade control and cascade control with limiting.

Input Selector (ISEL)

The block for selecting a signal (Input Selector Block - ISEL) allows the user to choose up to four inputs

and generates an output based on the configured action.

Block description Block index1)

1) The values in brackets are valid if all the AI blocks (AI1-AI6) are instantiated.

Execution time

(macro cycle ≤500 ms)

Block class

Resource Block

Transducer Block Sensor 1

Transducer Block Sensor 2

Transducer Block Display

Transducer Block Adv. Diag.

Function block AI1

Function block AI2

Function block AI3

Function block AI4

Function block AI5

Function block AI6

Function block PID

Function block ISEL

400

500

600

700

800

900

1000

1100

(1200)

(1300)

(1400)

1200 (1500)

1300 (1600)

30 ms

30 ms (not instantiated)

25 ms

20 ms

Extended

Manufacturer-specific

Extended

Standard

TMT85

Endress+Hauser 7

Power supply

Electrical connection

A0007285-EN

Terminal assignment of head transmitter.

Supply voltage U = 9 to 32 V DC, polarity independent (max. voltage Ub= 35 V)

Performance characteristics

Response time 1 s per channel

Reference operating

conditions

• Calibration temperature: + 25 °C ± 5 K (77 °F ± 9 °F)

•Supplyvoltage:24VDC

• 4-wire circuit for resistance adjustment

Resolution Resolution A/D converter = 18 bit

Maximum measured error

Sensor input 2 Sensor input 1 Bus connection

and supply voltage

Display connection/

service interface

TC, mV

RTD, 4-, 3- and 2-wire:Ω

RTD, 3- and 2-wire:Ω

TC, mV

white

red

white

red

(black)

(yellow)

(black)

The accuracy data are typical values and correspond to a standard deviation of ± 3σ(normal

distribution), i.e. 99.8% of all the measured values achieve the given values or better values.

Designation Performance characteristics

Resistance thermometers (RTD)

Cu100, Pt100, Ni100, Ni120

Pt500

Cu50, Pt50, Pt1000, Ni1000

Cu10, Pt200

0.1 °C (0.18 °F)

0.3 °C (0.54 °F)

0.2 °C (0.36 °F)

1 °C (1.8 °F)

Thermocouples (TC)

Type: K, J, T, E, L, U

Type: N, C, D

Type: S, B, R

typ. 0.25 °C (0.45 °F)

typ. 0.5 °C (0.9 °F)

typ. 1.0 °C (1.8 °F)

Measuring range Performance characteristics

Resistance transmitters (Ω)10 to 400 Ω

10 to 2000 Ω

± 0.04 Ω

± 0.8 Ω

Voltage transmitters (mV) -20 to 100 mV ± 10 μV

TMT85

8Endress+Hauser

Sensor transmitter matching

RTD sensors are one of the most linear temperature measuring elements. Nevertheless, the output

must be linearized. To improve temperature measurement accuracy significantly, the device enables

the use of two methods:

• Callendar-Van Dusen coefficients (Pt100 resistance thermometer)

The Callendar-Van Dusen equation is described as:

The coefficients A, B and C are used to match the sensor (platinum) and transmitter in order to

improve the accuracy of the measuring system. The coefficients for a standard sensor are specified

in IEC 751. If no standard sensor is available or if greater accuracy is required, the coefficients for

each sensor can be determined specifically by means of sensor calibration.

• Linearization for copper/nickel resistance thermometers (RTD)

The polynomial equations for nickel are described as:

The equations for copper, subject to temperature, are described as:

T = -50 °C to 200 °C (-58 °F to 392 °F)

T = -180 °C to -50 °C (-292 °F to -58 °F)

These coefficients A, B and C are used for the linearization of nickel or copper resistance

thermometers (RTD). The exact values of the coefficients derive from the calibration data and are

specific to each sensor.

Sensor transmitter matching using one of the above-named methods significantly improves the

temperature measurement accuracy of the entire system. This is due to the fact that to calculate the

temperature measured, the transmitter uses the specific data pertaining to the connected sensor

instead of using the standardized sensor curve data.

Non-repeatability As per EN 61298-2

Long-term stability ≤0.1 °C/year (≤0.18 °F/year) in reference operating conditions

Influence of ambient tempe-

rature (temperature drift)

-100

Physical input measuring range of sensors Non-repeatability

10 to 400 ΩCu10, Cu50, Cu100, Pt50, Pt100, Ni100,

Ni120

15 mΩ

10 to 2000 ΩPt200, Pt500, Pt1000, Ni1000 100 ppm x measured value

-20 to 100 mV Thermocouples type: C, D, E, J, K, L, N, U 4 μV

-5 to 30 mV Thermocouples type: B, R, S, T 3 μV

Impact on accuracy when ambient temperature changes by 1 K (1.8 °F):

Input 10 to 400 Ω0.001% of the measured value, min. 1 mΩ

Input 10 to 2000 Ω0.001% of the measured value, min. 10 mΩ

Input -20 to 100 mV 0.001% of the measured value, min. 0.2 μV

Input -5 to 30 mV 0.001% of the measured value, min. 0.2 μV

TMT85

Endress+Hauser 9

Example Pt100: 0.00385 x 100 Ω/K = 0.385 Ω/K

Example of calculating the measured error with ambient temperature drift:

• Input temperature drift ϑ= 10 K (18 °F), Pt100, measuring range 0 to 100 °C (32 to 212 °F)

• Maximum process temperature: 100 °C (212 °F)

• Measured resistance value: 138.5 Ω(DIN EN 60751) at maximum process temperature

Typical temperature drift in Ω: (0.001% of 138.5 Ω) * 10 = 0.01385 Ω

Conversion to Kelvin: 0.01385 Ω/ 0.385 Ω/K = 0.04 K (0.054 °F)

Influence of reference point

(cold junction)

Pt100 DIN EN 60751 Cl. B, internal reference point for thermocouples TC

Installation conditions

Installation instructions •Mountinglocation:

A0016762

A: Terminal head as per DIN EN 50446 form B, direct installation onto insert with cable entry (middle hole 7 mm (0.28 in))

B: Separated from process in field housing, wall or pipe mounting

C: With DIN rail clip on mounting rail as per IEC 60715 (TH35)

• Orientation:

No restrictions

Typical sensitivity of resistance thermometers

Pt: 0.00385 * Rnom/K Cu: 0.0043 * Rnom/K Ni: 0.00617 * Rnom/K

Typical sensitivity of thermocouples

B: 10 μV/K C: 20 μV/K D: 20 μV/K E: 75 μV/K J: 55 μV/K K: 40 μV/K

L: 55 μV/K N: 35 μV/K R: 12 μV/K S: 12 μV/K T: 50 μV/K U: 60 μV/K

120 mm

(4.72 in)

120 mm

(4.72 in)

TMT85

10 Endress+Hauser

Environment conditions

Ambient temperature range -40 to +85 °C (-40 to +185 °F), for hazardous areas see Ex documentation (XA, CD) and "Approvals"

section.

Storage temperature -40 to +100 °C (-40 to +212 °F)

Altitude up to 4000 m (4374.5 yd) above mean sea level in accordance with IEC 61010-1, CSA 1010.1-92

Climate class as per IEC 60654-1, Class C

Humidity • Condensation as per IEC 60068-2-33 permitted

• Max. rel. humidity: 95% as per IEC 60068-2-30

Degree of protection • IP00 with screw terminals. In the installed state, it depends on the terminal head or field housing

used.

• IP30 with spring terminals

• IP66/67 when installed in field housing TA30A, TA30D or TA30H

Shock and vibration

resistance

10 to 2000 Hz for 5g as per IEC 60068-2-6

Electromagnetic

compatibility (EMC)

CE EMC compliance

The device meets all of the requirements mentioned in IEC 61326-1, 2007 and NAMUR NE21:2006.

This recommendation is a consistent determination whether the devices used in laboratories and in

process control systems are immune to interference, thus increasing their functional safety.

Measuring category Measuring category II as per IEC 61010-1. The measuring category is provided for measuring on power

circuits that are directly connected electrically with the low-voltage network.

Degree of contamination Pollution degree 2 as per IEC 61010-1.

ESD (electrostatic discharge) IEC 61000-4-2 6 kV cont., 8 kV air

Electromagnetic fields IEC 61000-4-3 0.08 to 4 GHz 10 V/m

Burst (fast transients) IEC 61000-4-4 1 kV

Surge IEC 61000-4-5 1 kV asym.

Conducted RF IEC 61000-4-6 0.01 to 80 MHz 10 V

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