Endress+Hauser iTEMP TMT85 User manual

Products Solutions Services
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
m Two sensors with measuring input (RTD or TC) in remote installation with the following advantages: drift warning,
sensor backup function and temperature-dependent switching
n 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
mn
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
H1
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 +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 K
10 K
10 K
10 K
10 K
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)
-50 to +1768 °C (-58 to +3214 °F)
-260 to +400 °C (-436 to +752 °F)
0 to +2315 °C (+32 to +4199 °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 +1100 °C (+32 to +2012 °F)
0 to +1400 °C (+32 to +2552 °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 +2000 °C (+32 to +3632 °F)
0 to +750 °C (+32 to +1382 °F)
-185 to +400 °C (-301 to +752 °F)
50 K
50 K
50 K
50 K
50 K
50 K
50 K
50 K
50 K
50 K
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
RTD or resistance
transmitter, 3-wire   -Â
RTD or resistance
transmitter, 4-wire ----
Thermocouple (TC),
voltage transmitter    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
30 ms
30 ms (not instantiated)
30 ms (not instantiated)
30 ms (not instantiated)
25 ms
20 ms
Extended
Manufacturer-specific
Manufacturer-specific
Manufacturer-specific
Manufacturer-specific
Extended
Extended
Extended
Extended
Extended
Extended
Standard
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
-
+
+
1
-
2
7
6
5
4
3
1
2
7
6
5
4
3
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
red
white
white
red
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)
3
-100
3
-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
AB
C
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