Endress+Hauser TM372 Operating Manual

BA01581T/09/EN/03.18
71413053
2018-08-20

Valid as of version

01.00 (device version)

Products Solutions Services

Operating Instructions

iTHERM TrustSens TM371,
TM372

Compact thermometer with self-calibration

iTHERM TrustSens TM371, TM372 Table of contents

Table of contents

1 About this document ................ 4

1.1 Document function ..................... 4

1.2 Symbols .............................. 4

1.3 Documentation ........................ 5

2 Basic safety instructions ............ 6

2.1 Requirements for personnel ............... 6

2.2 Intended use .......................... 6

2.3 Operation safety ....................... 6

2.4 Product safety ......................... 6

3 Incoming acceptance and product

identification ....................... 7

3.1 Incoming acceptance .................... 7

3.2 Product identification .................... 7

3.3 Transport and storage ................... 9

4 Mounting ......................... 10

4.1 Mounting conditions ................... 10

4.2 Mounting the measuring device ........... 10

4.3 Post-mounting check ................... 13

9 Diagnostics and troubleshooting ... 35

9.1 Troubleshooting ...................... 35

9.2 Diagnostic information via LEDs ........... 35

9.3 Diagnostic information ................. 36

9.4 Overview of diagnostics events ............ 37

9.5 Diagnostic list ........................ 39

9.6 Event logbook ........................ 39

9.7 Firmware history ...................... 39

10 Maintenance ...................... 40

10.1 Cleaning ............................ 40

11 Repair ............................ 41

11.1 Spare parts .......................... 41

11.2 Return .............................. 41

11.3 Disposal ............................ 41

12 Accessories ....................... 42

12.1 Device-specific accessories ............... 42

12.2 Communication-specific accessories ........ 45

12.3 Service-specific accessories ............... 46

12.4 System components .................... 47

5 Electrical connection .............. 14

5.1 Connecting requirements ................ 14

5.2 Connecting the device .................. 14

5.3 Ensuring the degree of protection .......... 14

5.4 Post-connection check .................. 15

6 Operability ........................ 15

6.1 Overview of operation options ............ 15

6.2 Structure and function of the operating

menu .............................. 16

6.3 Access to the operating menu via an

operating tool ........................ 17

7 System integration ................ 21

7.1 Overview of device description files ......... 21

7.2 Measured variables via HART protocol ...... 21

7.3

Supported HART® commands ............. 22

8 Commissioning .................... 24

8.1 Function check ....................... 24

8.2 Switching on the measuring device ......... 24

8.3 Configuring the measuring device .......... 24

8.4 Creating a calibration report .............. 26

8.5 Protecting settings from unauthorized

access .............................. 28

8.6 Advanced settings ..................... 29

13 Technical Data .................... 47

13.1 Input ............................... 47

13.2 Output ............................. 47

13.3 Wiring ............................. 48

13.4 Performance characteristics .............. 49

13.5 Environment ......................... 53

13.6 Mechanical construction ................ 54

13.7 Certificates and approvals ............... 72

14 Operating menu and parameter

description ........................ 74

14.1 Setup menu .......................... 78

14.2 Calibration menu ...................... 79

14.3 Diagnostics menu ..................... 83

14.4 Expert menu ......................... 92

Endress+Hauser 3

About this document iTHERM TrustSens TM371, TM372

DANGER

WARNING

CAUTION

NOTICE

1 About this document

1.1 Document function

These Operating Instructions contain all the information that is required in various phases
of the life cycle of the device: from product identification, incoming acceptance and
storage, to mounting, connection, operation and commissioning through to
troubleshooting, maintenance and disposal.

1.2 Symbols

1.2.1 Safety symbols

Symbol Meaning

DANGER!

This symbol alerts you to a dangerous situation. Failure to avoid this situation will
result in serious or fatal injury.

WARNING!

This symbol alerts you to a dangerous situation. Failure to avoid this situation can
result in serious or fatal injury.

CAUTION!

This symbol alerts you to a dangerous situation. Failure to avoid this situation can
result in minor or medium injury.

NOTE!

This symbol contains information on procedures and other facts which do not result in
personal injury.

1.2.2 Electrical symbols

Symbol Meaning

Direct current

Alternating current

Direct current and alternating current

Ground connection

A grounded terminal which, as far as the operator is concerned, is grounded via a
grounding system.

Protective Earth (PE)

A terminal which must be connected to ground prior to establishing any other
connections.

The ground terminals are situated inside and outside the device:

• Inner ground terminal: Connects the protectiv earth to the mains supply.

• Outer ground terminal: Connects the device to the plant grounding system.

1.2.3 Symbols for certain types of information

Symbol Meaning

Permitted

Procedures, processes or actions that are permitted.

Preferred

Procedures, processes or actions that are preferred.

4 Endress+Hauser

iTHERM TrustSens TM371, TM372 About this document

,…,

Symbol Meaning

Forbidden

Procedures, processes or actions that are forbidden.

Tip

Indicates additional information.

Reference to documentation

Reference to page

Reference to graphic

Series of steps

Result of a step

Help in the event of a problem

Visual inspection

1.2.4 Tool symbols

Symbol Meaning

Open-ended wrench

A0011222

1.3 Documentation

For an overview of the scope of the associated Technical Documentation, refer to the
following:

• W@M Device Viewer (www.endress.com/deviceviewer): Enter the serial number
from nameplate

• Endress+Hauser Operations App: Enter the serial number from the nameplate or
scan the 2D matrix code (QR code) on the nameplate

1.3.1 Standard documentation

Document type Purpose and content of the document

Technical Information Planning aid for your device

The document contains all the technical data on the device and provides
an overview of the accessories and other products that can be ordered for
the device.

Brief Operating Instructions Guide that takes you quickly to the 1st measured value

The Brief Operating Instructions contain all the essential information
from incoming acceptance to initial commissioning.

1.3.2 Supplementary device-dependent documentation

Additional documents are supplied depending on the device version ordered: Always
comply strictly with the instructions in the supplementary documentation. The
supplementary documentation is an integral part of the device documentation.

Endress+Hauser 5

Basic safety instructions iTHERM TrustSens TM371, TM372

2 Basic safety instructions

2.1 Requirements for personnel

The personnel for installation, commissioning, diagnostics and maintenance must fulfill
the following requirements:

Trained, qualified specialists must have a relevant qualification for this specific function

‣

and task.
Are authorized by the plant owner/operator.

‣

Are familiar with federal/national regulations.

‣

Before starting work, read and understand the instructions in the manual and

‣

supplementary documentation as well as the certificates (depending on the
application).
Follow instructions and comply with basic conditions.

‣

The operating personnel must fulfill the following requirements:

Are instructed and authorized according to the requirements of the task by the facility's

‣

owner-operator.
Follow the instructions in this manual.

‣

2.2 Intended use

• The device is a compact thermometer for the acquisition and conversion of temperature
input signals for industrial temperature measurement.

• The manufacturer is not liable for damage caused by improper or non-intended use.

2.3 Operation safety

NOTICE

Operation safety

Operate the device in proper technical condition and fail-safe condition only.

‣

The operator is responsible for interference-free operation of the device.

‣

Conversions to the device

Unauthorized modifications to the device are not permitted and can lead to unforeseeable
dangers.

If, despite this, modifications are required, consult with Endress+Hauser.

‣

Repair

Due to its design, the device cannot be repaired.

However, it is possible to send the device in for examination.

‣

To ensure continued operational safety and reliability, use original spare parts and

‣

accessories from Endress+Hauser only.

2.4 Product safety

This measuring device is designed in accordance with good engineering practice to meet
state-of-the-art safety requirements, has been tested, and left the factory in a condition in
which it is safe to operate.

It meets general safety standards and legal requirements. It also complies with the EC
directives listed in the device-specific EC Declaration of Conformity. Endress+Hauser
confirms this by affixing the CE mark to the device.

6 Endress+Hauser

iTHERM TrustSens TM371, TM372 Incoming acceptance and product identification

DELIVERYNOTE

TMT162

TrustSens
TM371, 372

3 Incoming acceptance and product

identification

3.1 Incoming acceptance

1. Unpack the device carefully. Is the packaging or content damaged?
 The damaged content must not be installed; in those conditions the

manufacturer cannot guarantee the original safety requirements or the material
resistance and cannot be considered as responsible for any consequent damages.

2. Is the delivery complete? Compare the scope of delivery against the information on
your order form.

3.

Do the nameplate data match the ordering information on the delivery note?

4.

Are the technical documentation and additional documents (e.g. certificates)
present?

If one of the conditions does not comply, contact your Endress+Hauser distributor.

3.2 Product identification

The following options are available for identification of the device:

• Nameplate specifications

• Enter the serial number from the nameplate in the W@M Device Viewer
(www.endress.com/deviceviewer): All data relating to the device and an overview of
the Technical Documentation supplied with the device are displayed.

A0028503

A0028522

Endress+Hauser 7

Incoming acceptance and product identification iTHERM TrustSens TM371, TM372

Input:

1

2

3
4
5

6

3.2.1 Nameplate

Is this the correct device?

Compare and check the data on the nameplate of the device against the requirements of the
measuring point:

1 Order code, serial number

2 Device TAG name

3 Supply voltage and current consumption

4 Device revision and firmware version

5 Ambient temperature

6 Approvals with symbols

A0033853

 1 Nameplate of the compact thermometer

(example)

3.2.2 Scope of delivery

The scope of delivery comprises:

• Compact thermometer

• Hard copy of multi-language Brief Operating Instructions

• Ordered accessories

3.2.3 Certificates and approvals

An overview of further approvals and certifications is provided in the ’Technical data’
section. →  72

CE/EAC mark, declaration of conformity

The device meets the legal requirements of the EU/EEU guidelines. The manufacturer
confirms that the device is compliant with the relevant guidelines by applying the CE/EAC
mark.

Hygiene standard

• EHEDG certification, type EL - CLASS I. Permitted process connections in accordance
with EHEDG, see section 'Process connections' →  64

• 3-A authorization no. 1144, 3-A sanitary standard 74-06. Permitted process
connections in accordance with 3-A, see section 'Process connections' →  64

• ASME BPE, certificate of conformity can be ordered for indicated options

• FDA-compliant

• All product contact surfaces are produced without animal fats (TSE Certificate of
Suitability)

8 Endress+Hauser

iTHERM TrustSens TM371, TM372 Incoming acceptance and product identification

Parts in contact with the medium

Parts of the thermometer in contact with the medium comply with the following European
regulations:

• (EC) No. 1935/2004, Article 3, paragraph 1, Articles 5 and 17 on materials and articles
intended to come into contact with food.

• (EC) No. 2023/2006 on good manufacturing practice for materials and articles intended
to come into contact with food.

• (EU) No. 10/2011 on plastic materials and articles intended to come into contact with
food.

3.3 Transport and storage

Pack the device in such a way as to protect it reliably against impact for storage (and
transportation). The original packaging provides optimum protection.

Storage temperature –40 to +85 °C (–40 to +185 °F)

Endress+Hauser 9

Mounting iTHERM TrustSens TM371, TM372

SW/AF 32

SW/AF 17

1

2

3

4

4 Mounting

4.1 Mounting conditions

Information about the conditions, which have to be existent at the mounting location
for a designated use, such as ambient temperature, degree of protection, climate class,
etc., as well as device dimensions - see section 'Technical Data', →  47

The immersion length of the thermometer can influence the accuracy. If the immersion
length is too small then errors in the measurement are caused by heat conduction via the
process connection. If installing into a pipe then the immersion length should ideally be
half of the pipe diameter. →  10

• Installation possibilities: Pipes, tanks or other plant components

• Orientation: no restrictions. However, self-draining in the process must be guaranteed. If
there is an opening to detect leaks at the process connection, this opening must be at the
lowest possible point.

4.2 Mounting the measuring device

Required tools for mounting in an existing protection tube: Open-end wrench or mounting
socket wrench SW/AF 32

A0028639

 2 Mounting process of the compact thermometer

1 Mounting of iTHERM QuickNeck connection to the existing protection tube with iTHERM QuickNeck bottom

part - no tools required
2 Hexagonal head SW/AF 32 for the mounting in an existing protection tube for M24-, G3/8"-thread
3 Adjustable compression fitting TK40 - mounting of the hexagonal screw with open-end wrench SW/AF 17

only
4 Protection tube

10 Endress+Hauser

iTHERM TrustSens TM371, TM372 Mounting

U

≥ 3°

≥ 3°

1

2

3

4

1

2

3

4

5

M

M

M

A0031007

 3 Mounting possibilities in the process

1, 2 Perpendicular to flow direction, installed at a min. angle of 3° to ensure self-draining
3 On elbows
4 Inclined installation in pipes with a small nominal diameter
U Immersion length

In the case of pipes with a small nominal diameter, it is advisable for the tip of the
thermometer to project well into the process so that it extends past the pipe axis.
Installation at an angle (4) could be another solution. When determining the immersion
length or installation depth all the parameters of the thermometer and of the medium to
be measured must be taken into account (e.g. flow velocity, process pressure).

Maximum torque

A0035951

Protection tube version TT411, 6 mm (0.24 in) (1)

TT411, 6 mm (0.24 in) and
Necktube TE411 (2)

Torque M 3 to 5 Nm (2.2 to 3.7 lbf ft) 10 Nm (7.4 lbf ft) 3 to 5 Nm (2.2 to 3.7 lbf ft)

TT411,
9 mm (0.35 in) (3)

TT411, 12.7 mm (¹⁄₂ in) (4)
TT411, 12.7 mm (¹⁄₂ in) and
Necktube TE411 (5)

When connecting the device with the protection tube: only turn the hexagonal
spanner flat on the bottom of the housing.

Endress+Hauser 11

Mounting iTHERM TrustSens TM371, TM372

1

2

1 2

3 4

R0.4 R0.4

Sensor with
milk pipe
connection

Sensor Variventwith
connection

Shaped
gasket

Companion
connection

O-ring

Groove
slip-on nut

Centering ring

Sealing

Companion
connection

Companion
connection

Gasket
(O-ring)

Welding boss

Leak detection hole

Vessel wall

A0031022

 4 Process connections for thermometer installation in pipes with small nominal diameters

1 Varivent® process connection type N for DN40
2 Corner piece or T-piece (illustrated) for weld-in as per DIN 11865 / ASME BPE 2012

12 Endress+Hauser

 5 Detailed installation instructions for hygiene-compliant installation

1 Sanitary connection according to DIN 11851, only in connection with EHEDG-certified and self-centering

sealing ring
2 Varivent® process connection for VARINLINE® housing
3 Clamp according to ISO 2852
4 Liquiphant-M G1" process connection, horizontal installation

A0028648-EN

iTHERM TrustSens TM371, TM372 Mounting

The counterpieces for the process connections and the seals or sealing rings are not
included in the scope of supply for the thermometer. Liquiphant M weld-in adapters with
associated seal kits are available as accessories. →  42

Procedure in case of seal failure indicated by leak detection port:

1. Disassembling of the thermometer, validated cleaning procedure of thread and
sealing ring groove

2. Replacement of the seal or sealing ring

3. CIP after re-assembly

In the case of weld-in connections, exercise the necessary degree of care when performing
the welding work on the process side:

• Suitable welding material

• Flush-welded or with welding radius > 3.2 mm (0.13 in)

• No recesses, folds or gaps

• Honed and polished surface, Ra ≤ 0.76 µm (0.03 µin)

As a general rule, the thermometers should be installed in such a way that does not
impact their ability to be cleaned (the requirements of the 3-A Standard must be
observed). The Varivent® and Liquiphant-M weld-in adapter and Ingold (+ weld-in
adapter) connections enable flush-mounted installation.

4.3 Post-mounting check

 Is the device undamaged (visual inspection)?

 Is the device fixed appropriately?

Does the device comply to the measurement point specifications, such as ambient temperature, etc.?



→  47

Endress+Hauser 13

Electrical connection iTHERM TrustSens TM371, TM372

M12x1

1

12...30 VDC
(4...20 mA)

3
0 V
(4...20 mA)

4

2

A

B

1 (BN) +

2 (WH) nc
3 (BU) -

4 (BK) nc

1.

2.

5 Electrical connection

5.1 Connecting requirements

According to the 3-A Standard electrical connecting cables must be smooth,
corrosion-resistant and easy to clean.

5.2 Connecting the device

NOTICE

To prevent damage to the device

To prevent any kind of damage from the device electronics, leave the pins 2 and 4

‣

unconnected. They are reserved for the connection of the configuration cable.
Do not tighten the M12 plug too much, in order to prevent damage to the device.

‣

A0028623

 6 Cable plug M12x1 and PIN assignment of the connection socket at the device

If voltage supply is connected correctly and the measuring device is operational, the LED is
illuminated green.

5.3 Ensuring the degree of protection

The specified degree of proctection is ensured when the M12x1 cable plug is tightened. In
order to reach IP69K degree of protection, appropriate cord sets with straight or angle
plugs are available as accessories.

14 Endress+Hauser

iTHERM TrustSens TM371, TM372 Operability

2 3

1

4 5

5.4 Post-connection check

Is the device or cable undamaged (visual check)?



Do the cables have adequate strain relief?



Does the supply voltage match the specifications on the nameplate?



6 Operability

6.1 Overview of operation options

A0031089

 7 Operating options of the device

1

Installed iTHERM compact thermometer with HART® communication protocol

2 RIA15 loop powered process display - It is integrated in the current loop and displays the measuring signal or

HART® process variables in digital form. The process display unit does not require an external power supply.
It is powered directly from the current loop.

3 Active barrier RN221N - The RN221N (24 V DC, 30 mA) active barrier has a galvanically isolated output for

supplying voltage to loop-powered transmitters. The universal power supply works with an input supply

voltage of 20 to 250 V DC/AC, 50/60 Hz, which means that it can be used in all international power grids.
4 Commubox FXA195 for intrinsically safe HART® communication with FieldCare via the USB interface.
5 FieldCare is a FDT-based plant asset management tool from Endress+Hauser, more details see section

'accessories'. The acquired self-calibration data is stored in the device (1) and can be read using FieldCare.

This also enables an auditable calibration certificate to be created and printed.

Endress+Hauser 15

Operability iTHERM TrustSens TM371, TM372

Expert

System

Communication

Operating menu for experts

Setup

Device tag

Diagnostics

Operating menu for operators and maintenances

Maintenance

Expert

Output

Unit
4 mA value

20 mA value

Actual diagnostics

Operating time

Diagnostic list

Actual diagnostics count

Enter access code

Unit

4 mA value

HART configuration

HART info

HART output

Device type

Assigncurrentoutput(PV)

Event logbook

Device information

Simulation

Previous diagnostics 1

Device tag

Min/max values

Sensor value

Measured values

Sensor min v.

Device tag

Definesoftware writeprotectioncode

Administration

Operation

Previous diagnostics 1

Loop check configuration

Loop check config.

Failure mode

Calibration

Number of self calibrations

Deviation

Limits

Interval monitoring

Self calibration monitoring

Stored self calibration points

Adjustment

Calibration report

...

Diagnostic simulation

Diagnostic settings

Access status tooling

Locking status

Lower warning value

Diagnostic behavior

6.2 Structure and function of the operating menu

6.2.1 Structure of the operating menu

A0032327-EN

16 Endress+Hauser

iTHERM TrustSens TM371, TM372 Operability

Submenus and user roles

Certain parts of the menu are assigned to certain user roles. Each user role corresponds to
typical tasks within the lifecycle of the device.

User role Typical tasks Menu Content/meaning

Maintenance
Operator

Expert Tasks that require detailed knowledge of the function

Commissioning:

• Configuration of the measurement.

• Configuration of data processing (Measurement
range, etc.).

Reading measured values.

Calibration:

• Configuration of the warning and alarm limit values
as well as interval monitoring.

• Configuration and creation of a calibration report
(wizard).

Fault elimination:

• Diagnosing and eliminating process errors.

• Interpretation of device error messages and
correcting associated errors.

of the device:

• Commissioning measurements under difficult
conditions.

• Optimal adaptation of the measurement to difficult
conditions.

• Detailed configuration of the communication
interface.

• Error diagnostics in difficult cases.

"Setup"
"Calibration"

"Diagnostics" Contains all parameters for detecting and analyzing

"Expert" Contains all parameters of the device (including those

Contains all parameters for commissioning and
calibration:

• Setup parameters
Once values have been set for these parameters, the
measurement should generally be completely
configured.

• Calibration parameters
Contains all information and parameters for the self­calibration, including a wizard for creating a
calibration report. This wizard is available in the
online parameterization.

errors:

• Diagnostic list
Contains up to 3 currently pending diagnostic
messages.

• Event logbook
Contains the last 5 diagnostic messages (no longer
pending).

• "Device information" submenu
Contains information for identifying the device.

• "Measured values" submenu
Contains all current measured values.

• "Simulation" submenu
Is used to simulate measured values or output values.

• Diagnostic settings
Configuration of diagnostic behavior and status
signal according to NE107

that are already in one of the other menus). The
structure of this menu is based on the function blocks
of the device:

• "System" submenu
Contains all higher-order device parameters that do
not pertain either to measurement or the measured
value communication.

• "Output" submenu
Contains all parameters for configuring the analog
current output and the loop check.

• "Communication" submenu
Contains all parameters for configuring the digital
communication interface.

6.3 Access to the operating menu via an operating tool

6.3.1 FieldCare

Function scope

FDT/DTM-based plant asset management tool from Endress+Hauser. It can configure all
smart field units in a system and help you manage them. By using the status information,
it is also a simple but effective way of checking their status and condition. Access takes
place via the HART® protocol or CDI (= Endress+Hauser Common Data Interface).

Endress+Hauser 17

Operability iTHERM TrustSens TM371, TM372

Typical functions:

• Configuring parameters of the device

• Loading and saving device data (upload/download)

• Documentation of the measuring point

For iTHERM TrustSens thermometers, FieldCare provides convenient access to
automatically created self-calibration reports.

For details, see Operating Instructions BA00027S/04 and BA00065S/04 in the
download area on www.endress.com.

Source for device description files

See data →  21

Establishing a connection

As example: via HART® modem Commubox FXA191 (RS232) or FXA195 (USB)

1. Make sure to update the DTM library for all connected devices (e.g. FXA19x, iTHERM
TrustSens TM371).

2. Start FieldCare and create a project.

3. Go to View --> Network: Right-click on Host PC Add Device...
 The Add New Device window opens.

4. Select the HART Communication option from the list and press OK to confirm.

5. Double-click on HART Communication DTM instance.
 Check the Serial Interface port for the correct modem and press OK to confirm.

6. Right-click on HART Communication and select the Add Device... option in the
context menu that opens.

7. Select the desired device from the list and press OK to confirm.
 The device appears in the network list.

8. Right-click on this device and select the Connect option in the context menu that
opens.

 The CommDTM appears in green color.

9. Double-click on the device in the network list to establish the online connection to
the device.

 The online parameterization is available.

18 Endress+Hauser

iTHERM TrustSens TM371, TM372 Operability

1

3

4

5

6

2

7

User interface

A0032334-EN

 8 User interface with device information via HART®-communication

1 Network view
2 Header
3 Device tag and device name
4 Status area for the status signal
5 Measured values with general device information: PV, output current, percent of range, device temperature
6 Navigation area with operating menu structure
7 Display and input area

6.3.2 DeviceCare

Function scope

DeviceCare is a free configuration tool for Endress+Hauser devices. It supports devices with
the following protocols, provided a suitable device driver (DTM) is installed: HART,
PROFIBUS, FOUNDATION Fieldbus, Ethernet/IP, Modbus, CDI, ISS, IPC and PCP. The tool is
aimed at customers without a digital network in plants and workshops as well as Endress
+Hauser service technicians. The devices can be connected directly via a modem (point-to­point) or a bus system. DeviceCare is fast, easy and intuitive to use. It can run on a PC,
laptop or tablet with a Windows operating system.

Source for device description files

See data →  21

6.3.3 Field Xpert

Function scope

Field Xpert is an industrial PDA (personal digital assistant) with integrated touchscreen for
commissioning and maintaining field devices in explosion hazardous and non-hazardous
areas. It allows efficient configuration of FOUNDATION fieldbus, HART and WirelessHART
devices.

Source for device description files

See data →  21

Endress+Hauser 19

Operability iTHERM TrustSens TM371, TM372

6.3.4 AMS Device Manager

Function scope

Program from Emerson Process Management for operating and configuring measuring
devices via the HART® protocol.

Source for device description files

See data →  21

6.3.5 SIMATIC PDM

Function scope

SIMATIC PDM is a standardized, manufacturer-independent program from Siemens for
the operation, configuration, maintenance and diagnosis of intelligent field devices via the
HART ® protocol.

Source for device description files

See data →  21

6.3.6 Field Communicator 375/475

Function scope

Industrial handheld terminal from Emerson Process Management for remote
configuration and measured value display via the HART ® protocol.

Source for device description files

See data →  21

20 Endress+Hauser

iTHERM TrustSens TM371, TM372 System integration

7 System integration

7.1 Overview of device description files

Version data for the device

Firmware version 01.00.zz The firmware version can be found:

• on the nameplate →  1,  8

• in the operating menu: Diagnostics → Device
information → Firmware version

•

Please make sure to use the operating



instructions valid for the device. The
corresponding firmware versions for each
operating instructions can be found on its title
page.

Manufacturer ID (17) 0x11 Operating menu: Diagnostics → Device information →

Manufacturer ID

Device type 0x11CF Operating menu: Expert → Communication → HART

info → Device type

HART protocol revision 7.0 Operating menu: Expert → Communication → HART

info → HART revision

Device revision 1 • On the nameplate →  1,  8

• Operating menu: Expert → Communication → HART
info → Device revision

The suitable device driver software (DD/DTM) for the individual operating tools can be
obtained from different sources:

• www.endress.com --> Downloads --> Media Type: Software --> Software Type:
Application Software

• www.endress.com --> Products: individual product page e.g. TM371 --> Documents /
Manuals / Software: Electronic Data Description (EDD) or Device Type Manager (DTM).

• via DVD (contact your local Endress+Hauser sales center)

Endress+Hauser supports all common operating tools of different manufacturers (e.g.
Emerson Process Management, ABB, Siemens, Yokogawa, Honeywell and many more).
The Endress+Hauser operating tools FieldCare and Device care can also be obtained per
download (www. endress.com --> Downloads --> Media Type: Software --> Application
Software) or via optical data storage medium (DVD) from your local Endress+Hauser sales
center.

7.2 Measured variables via HART protocol

The measured values (device variables) are assigned to the device variables as follows:

Dynamic variable Device variable

Primary value (PV) Temperature

Secondary value (SV) Device temperature

Tertiary value (TV) Number of self-calibrations

Quaternary value (QV) Calibration deviation

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System integration iTHERM TrustSens TM371, TM372

7.3

Supported HART® commands

The HART® protocol enables the transfer of measurement data and device data
between the HART® master and the field device. HART® masters such as the above
listed operating tools require an appropriate device driver software (DD or DTM) to
establish the data exchange. The data exchange is initiated via commands.

There are three different types of commands.

• Universal commands:
All HART® devices support and use universal commands. These are associated with the
following functionalities for example:
– Recognition of HART® devices
– Reading digital measured values

• Common practice commands:
Common practice commands offer functions which are supported and can be executed by
many but not all field devices.

• Device-specific commands:
These commands allow access to device-specific functions which are not HART

®

standard. Such commands access individual field device information.

Command No. Designation

Universal commands

0, Cmd0 Read unique identifier

1, Cmd001 Read primary variable

2, Cmd002 Read loop current and percent of range

3, Cmd003 Read dynamic variables and loop current

6, Cmd006 Write polling address

7, Cmd007 Read loop configuration

8, Cmd008 Read dynamic variable classifications

9, Cmd009 Read device variables with status

11, Cmd011 Read unique identifier associated with TAG

12, Cmd012 Read message

13, Cmd013 Read TAG, descriptor, date

14, Cmd014 Read primary variable transducer information

15, Cmd015 Read device information

16, Cmd016 Read final assembly number

17, Cmd017 Write message

18, Cmd018 Write TAG, descriptor, date

19, Cmd019 Write final assembly number

20, Cmd020 Read long TAG (32-byte TAG)

21, Cmd021 Read unique identifier associated with long TAG

22, Cmd022 Write long TAG (32-byte TAG)

38, Cmd038 Reset configuration changed flag

48, Cmd048 Read additional device status

Common practice commands

33, Cmd033 Read device variables

34, Cmd034 Write primary variable damping value

35, Cmd035 Write primary variable range values

40, Cmd040 Enter/Exit fixed current mode

22 Endress+Hauser

iTHERM TrustSens TM371, TM372 System integration

Command No. Designation

42, Cmd042 Perform device reset

44, Cmd044 Write primary variable units

45, Cmd045 Trim loop current zero

46, Cmd046 Trim loop current gain

50, Cmd050 Read dynamic variable assignments

54, Cmd054 Read device variable information

59, Cmd059 Write number of response preambles

95, Cmd095 Read Device Communication Statistics

100, Cmd100 Write Primary Variable Alarm Code

516, Cmd516 Read Device Location

517, Cmd517 Write Device Location

518, Cmd518 Read Location Description

519, Cmd519 Write Location Description

520, Cmd520 Read Process Unit Tag

521, Cmd521 Write Process Unit Tag

523, Cmd523 Read Condensed Status Mapping Array

524, Cmd524 Write Condensed Status Mapping Array

525, Cmd525 Reset Condensed Status Mapping Array

526, Cmd526 Write Simulation Mode

527, Cmd527 Simulate Status Bit

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Commissioning iTHERM TrustSens TM371, TM372

1

8 Commissioning

8.1 Function check

Before commissioning the device make sure that all final checks have been carried out:

• Checklist "Post-mounting check" , →  13

• Checklist "Post-connection check", →  15

8.2 Switching on the measuring device

Once the final checks have been successfully completed, it is time to switch on the supply
voltage. The device performs a number of internal test functions after power-up. This is
indicated by red LED-flashing. The device is operational after approx. 10 seconds in
normal operating mode. The LED on the device is illuminated green.

8.2.1 Display elements

1 LED signals for device status indication.

Function description of the different LED signals, see →  35

8.3 Configuring the measuring device

See 'Operating menu and parameter description'→  74

8.3.1 Defining the measurement range

To configure the measurement range, enter the 4 mA value and the 20 mA value.

A0031589

A0034666-EN

24 Endress+Hauser

iTHERM TrustSens TM371, TM372 Commissioning

2

1

Navigation

"Setup" menu → 4 mA value

"Setup" menu → 20 mA value

1. In the 4 mA value input window, enter the lower range value of your process
measurement range and press ENTER to confirm.

2. In the 20 mA value input window, enter the upper range value of your process
measurement range and press ENTER to confirm.

8.3.2 Defining the warning limits for the self-calibration

A0034668-EN

1 Values to be entered for the warning limits
2 Values to be entered for the alarm limits

Use this function to define the lower and upper warning limit. As a result of each self­calibration the deviation between the reference sensor and the Pt100 sensor is being
determined. If this deviation exceeds the defined warning limit, the device will transmit
the defined status signal and show the defined diagnostic behavior via the LED. (Factory
setting = Warning - LED red flashes, diagnostic number 144. Measured value status =
Uncertain / Not limited).

Navigation

"Calibration" menu → Limits → Lower warning value

"Calibration" menu → Limits → Upper warning value

1. In the Lower warning value input window, enter the lower warning limit for the
self-calibration deviation and press ENTER to confirm.

2. In the Upper warning value input window, enter the upper warning limit for the
self-calibration deviation and press ENTER to confirm.

Please consider the maximum limited value range to be entered: ±0.35 °C (±0.67 °F).
→  80

8.3.3 Defining the alarm limits for the self-calibration

Use this function to define the lower and upper alarm limit. As a result of each self­calibration the deviation between the reference sensor and the Pt100 sensor is being
determined. If this deviation exceeds the defined alarm limit, the device will transmit the
defined status signal and show the defined diagnostic behavior via the LED. (Factory
setting = Warning - LED red flashes, diagnostic number 143. Measured value status =
Uncertain / Not limited.)

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Commissioning iTHERM TrustSens TM371, TM372

1.

2.

Navigation

"Calibration" menu → Limits → Lower alarm value

"Calibration" menu → Limits → Upper alarm value

1. In the Lower alarm value input window, enter the lower limit for the self-calibration
deviation and press ENTER to confirm.

2. In the Upper alarm value input window, enter the upper warning limit for the self­calibration deviation and press ENTER to confirm.

Please consider the maximum limited value range to be entered: ±0.35 °C (±0.67 °F).
→  80

8.4 Creating a calibration report

The "calibration report" wizard guides you systematically through the process for creating a
calibration report for a pre-selected calibration point.

Navigation

"Calibration" menu → Calibration report

At least one stored self-calibration point must be in the device to start the online
wizard.

Configuration and creation of a calibration report

1.

To read the calibration point data from the device, enter the calibration point index.
Index 1 reads the latest calibration point.

2. Press READ DATA to confirm.
 An overview of device information and calibration point data appears. See table

below for detailed information.

A0033678-EN

26 Endress+Hauser

iTHERM TrustSens TM371, TM372 Commissioning

3.

4.

5.

3. Press CALIBRATION REPORT to continue.


A0033679-EN

Your file system explorer window appears. You are asked to save the calibration
report as a PDF file.

4. Enter a file name for the calibration report and select a memory location in your file
system.

 The calibration report is just being saved on your file system.

5.

A0033682-EN

Either press EXIT to end the calibration report wizard, press SELECT CALIBRATION
POINT to select another stored self-calibration point or press READ OLDER
CALIBRATION POINT to switch to the previous self-calibration point.

The creation of a self-calibration report is finished. The saved PDF-file can be opened to
read or to print the calibration report.

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Commissioning iTHERM TrustSens TM371, TM372

Relevant self-calibration data for creating a report

Device information

Operating time Use this function to display the total count of hours when the device was

powered.

Stored self-calibration points Displays the amount of all stored self-calibration points. This device is

able to store 350 self-calibration points. As soon as the memory would
reach its limit, the oldest self-calibration point will be overwritten.

Requested self-calibration point Enter the number of the requested self-calibration point. The latest self-

calibration point always has the number "1".

Calibration point data

Calibration ID Use this number to identify a self-calibration point. Each number is

unique and is not editable.

Self-calibration status This function shows the validity of the self-calibration point data.

Operating hours This function displays the value of the operating hours counter of the

shown self-calibration point.

Measured temperature value This function displays the measured Pt100 temperature value at that

specific time of the self-calibration.

Deviation This function displays the measured Pt100 self-calibration deviation from

the reference temperature. The deviation is calculated as follows:
Self-calibration deviation = reference temperature - measured Pt100
temperature value + adjustment

Adjustment This function displays the adjustment value added to the measured Pt100

value. This influences the self-calibration deviation. →  80
New adjustment = Adjustment - deviation of last self-calibration point

Measurement uncertainty This functions displays the maximum measurement uncertainty at the

self-calibration temperature.

Lower alarm value This function displays the defined lower alarm limit value. →  81

Upper alarm value This function displays the defined upper alarm limit value. →  81

Device restart counter Displays the device restarts between now and when the displayed self-

calibration was executed.

8.5 Protecting settings from unauthorized access

Use this function to protect the device from unwanted changes.

Navigation

Expert menu → System → Administration → Define device write protection code

If the code is programmed into the device firmware it is saved in the device and the
operating tool displays the value 0 so that the defined write protection code is not openly
displayed for viewing.

User entry: 0 to 9 999

Factory default: 0 = write protection is not active.

To activate the write protection please go through the following steps:

1. Define a write protection in the Enter access code parameter.

2. Enter a code which does not correspond the the one which is defined in step 1.
 The device is now write protected.

28 Endress+Hauser

iTHERM TrustSens TM371, TM372 Commissioning

Heartbeat Diagnostics

Heartbeat Verification

Pass/Fail

}

· ......................

· ......................

· ......................

· ......................

· ......................

Heartbeat Monitoring

Heartbeat Technology

TM

Deactivate the write protection

Enter the defined code in the Enter access code parameter.

‣

 The device is not write protected.

If the write protection code has been forgotten, it can be deleted or overwritten by the
service organization.

8.6 Advanced settings

The section contains a description of the additional parameters and technical data that are
available with the Heartbeat Verification and Heartbeat Monitoring application
packages.

8.6.1 Heartbeat modules

Overview

 9 Heartbeat modules

The modules are available in all the device versions. The Heartbeat functionality is
available with the revised device driver software (DTM, version 1.11.zz and higher).

Short description of the modules

Heartbeat Diagnostics

Function

• Continuous self-monitoring of the device.

• Diagnostic messages output to
– a local display, optional
– an asset management system (e.g. FieldCare/DeviceCare)
– an automation system (e.g. PLC)

Advantages

• Device condition information is available immediately and processed in time.

• The status signals are classified in accordance with VDI/VDE 2650 and NAMUR
recommendation NE 107 and contain information about the cause of the error and
remedial action.

Detailed description

→  30

A0020035

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Commissioning iTHERM TrustSens TM371, TM372

Heartbeat Verification

Device functionality checked on demand

• Verification of the correct functioning of the measuring device within specifications.

• The verification result provides information about the condition of the device: "Passed" or
"Failed".

• The results are documented in a verification report.

• The automatically generated report supports the obligation to demonstrate compliance
with internal and external regulations, laws and standards.

• Verification is possible without interrupting the process.

Advantages

• No onsite presence is required to use the function.

• The DTM

1)

triggers verification in the device and interprets the results. No specific

knowledge is required on the part of the user.

• The verification report can be used to prove quality measures to a third party.

• Heartbeat Verification can replace other maintenance tasks (e.g. periodic check) or
extend the test intervals.

Detailed description

→  31

Heartbeat Monitoring

Function

Calibration information is logged in addition to the verification parameters. 350
calibration points are saved in the device (FIFO memory).

Advantages

• Early detection of changes (trends) to ensure plant availability and product quality.

• Use of information for the proactive planning of measures (e.g. maintenance).

Detailed description

→  33

8.6.2 Heartbeat Diagnostics

Device diagnostic messages, along with remedial measures, are displayed in the operating
tool (FieldCare/DeviceCare).

For information on using the diagnostic messages, see the "Diagnostics and
troubleshooting" section. →  35

Diagnostic message in the operating tool

1. Navigate to the "Diagnostics" menu.
 The diagnostic event, along with the event text, is displayed in the Actual

diagnostics parameter.

1) DTM: Device Type Manager; controls device operation via DeviceCare, FieldCare, PACTware or a DTM-based control system.

30 Endress+Hauser

iTHERM TrustSens TM371, TM372 Commissioning

2. On the right in the display area, hover the cursor over the "Actual diagnostics"
parameter.



A0037333-EN

A tool tip with remedy information for the diagnostic event appears.

8.6.3 Heartbeat Verification

Verification report

Creating the verification report using the wizard

The wizard to create a verification report is only available if the device is operated via
FieldCare, DeviceCare, PACTware or a DTM-based control system.

Navigation

Menu "Diagnostics → Heartbeat" → Heartbeat Verification

1. Press the Heartbeat Verification button.
 The user-guided wizard appears.

2.

A0037334-EN

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Commissioning iTHERM TrustSens TM371, TM372

3. Follow the instructions given by the wizard.
 The wizard guides you through the entire process for creating the verification

report. The verification report can be saved in PDF and XML format.

The device must be in operation for at least 6 minutes before a verification can be
performed.

Content of the verification report

The verification report contains the results of the test objects: Passed or Failed is indicated
as the result.

Verification report: general information

Parameter Description/comments

Device information

System operator Name of the system operator; is defined when the verification report is created.

Location Location of the device within the plant; is defined when the verification report is

created.

Device tag Unique name for the measuring point so it can be identified quickly within the

plant. Is defined when commissioning the device.

Device name Displays the device name. It can also be found on the nameplate. It cannot be

changed.

Serial number Displays the serial number of the device. It can also be found on the nameplate.

It cannot be changed.

Order code Displays the order code of the device. It can also be found on the nameplate. It

cannot be changed.

Firmware version Displays the device firmware version installed. It cannot be changed.

Verification information

Operating time Indicates how long the device has been in operation up to this point.

Date/time Displays the current computer system time.

Comments Allows the user to enter optional comments, which appear in the verification

report.

Verification results

The test result for all the test
objects is given on the
subsequent pages. The
following results are possible:

• : Passed

• : Failed

Verification criteria for the test objects

Test object Verification criterion

Mainboard module

Electronics Checks the correct functioning of the electronics.

Memory content Checks the correct functioning of the data memory.

Supply voltage Checks the permitted supply voltage range.

Electronics temperature Checks the permitted electronics temperature range or device temperature

range.

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iTHERM TrustSens TM371, TM372 Commissioning

Test object Verification criterion

Sensor module

Sensor Checks whether the sensor works as per the specifications.

Reference temperature Checks whether the reference sensor works as per the specifications.

Sensor drift warning limit
exceeded

Sensor drift alarm limit exceeded Checks whether the configured alarm limits are exceeded.

Sensor information

Number of self-calibrations Displays all the self-calibrations executed up to now. This value cannot be

Deviation Displays the deviation of the measured value from the reference

Adjustment of the measurement Displays the adjustment of the calibration deviation.

Monitoring parameters

Device temperature min: Displays the minimum electronics temperature measured in the past

Device temperature max: Displays the maximum electronics temperature measured in the past

Sensor min value: Displays the minimum temperature measured in the past at the sensor

Sensor max. value: Displays the maximum temperature measured in the past at the sensor

Checks whether the configured warning limits are exceeded.

reset.

temperature.

(peakhold indicator).

(peakhold indicator).

input (peakhold indicator).

input (peakhold indicator).

Summary of results

Overall
results

Displays the overall result of the verification. The verification report can be saved in PDF and XML
format. To save the report, click the Save results as PDF button or the Save results as XML
button.

If the verification fails, try again or contact the Service Organization.



8.6.4 Heartbeat Monitoring

Calibration information is logged in addition to the verification parameters.

HART variable Output Unit

PV Temperature °C/°F

SV Device temperature °C/°F

TV Calibration counter -

QV Calibration deviation °C/°F

Monitoring information can be read out and analyzed as described below:

A higher-level controller is configured in such a way that calibration deviations and the
calibration counter are saved when the calibration counter changes. This type of function
is supported by Endress+Hauser's Advanced Data Manager Memograph M RSG45, for
example. The following table provides a sample overview of the monitoring analysis using
the Field Data Manager software MS20:

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Commissioning iTHERM TrustSens TM371, TM372

 Time stamp Device name Category Text

25.07.2018 TrustSens 1 (example)Self-calibration EH_TM371_M7041504487: self-calibration
(ID=183)
Serial number: M7041504487
Device name: iTHERM TM371/372
Operating hours: 1626 h
Reference temperature: 118.67 °C
Measured temperature value: 118.68 °C
Deviation: 0.01 °C
Measuring uncertainty (k=2): 0.35 °C
Max. permitted deviation: -0.80 / +0.80 °C
Assessment

 ... ... ... ...

34 Endress+Hauser

iTHERM TrustSens TM371, TM372 Diagnostics and troubleshooting

2

3

4

Commubox

PMC731: PIC0001
Online
1 >Group Select
2 PV 0.7 bar

HELP

SEND

HOME

1

1

9 Diagnostics and troubleshooting

9.1 Troubleshooting

Always start troubleshooting with the checklists below if faults occur after start up or
during operation. This takes you directly (via various queries) to the cause of the problem
and the appropriate remedial measures.

Due to its design, the device cannot be repaired. However, it is possible to send the
device back for examination. See the information in the "Return" section. →  41

General errors

Problem Possible cause Remedy

Device is not responding. Supply voltage range does not match

that specified on the nameplate.

M12 plug is not connected correctly,
wrong cable wiring.

Output current < 3.6 mA Device is defective. Replace the device.

HART communication is not
working.

Missing or incorrectly installed
communication resistor.

Apply correct voltage, see nameplate.

Check the wiring.

Install the communication resistor (250
Ω) correctly.

A0032326

1 TrustSens compact thermometer
2 HART® communication resistor, R =

≥ 250 Ω
3 PLC/DCS
4 Configuration examples: FieldCare

with Commubox, HART® handheld

communicator as well as via Field

Xpert SFX350/370

Commubox is not properly

Connect Commubox correctly .

connected.

9.2 Diagnostic information via LEDs

Position LEDs Function description

LED green (gn)
is illuminated

LED green (gn) is flashing

LED red (rd) and green
(gn) are flashing
alternating

A0031589

LED for device status

1

indication

LED red (rd) is flashing Presence of a diagnostic event: "Warning"

LED red (rd) is illuminated Presence of a diagnostic event: "Alarm"

Endress+Hauser 35

Voltage supply is correct. The device is
operational and the set limit values are met.

With a frequency 1 Hz: self-calibration
currently being performed.
With a frequency 5 Hz for 5 s: self-calibration
finished and valid, all process criteria were
within specifications. Calibration data stored.

Self-calibration process finished but not valid,
violation of necessary process criteria.
Calibration data not stored.

Diagnostics and troubleshooting iTHERM TrustSens TM371, TM372

9.3 Diagnostic information

Status signal and diagnostic behavior can be configured manually.

Status signal - Digital information available via HART® communication

Letter/
symbol

F Failure The device or its periphery behaves in such a way that the measurement value is

C Function

S Out of

M Maintenance

Status signal Meaning of the status signal

no longer valid. This includes faults/failures which are caused by the process being
measured, but have an impact on the ability to perform a measurement e.g. “no
process signal” detected.

The device is deliberately serviced, configured, parameterized or is in simulation

check

specification

required

mode. A situation exists where the output signal does not represent the process
value and is therefore not valid.

The device is operating outside of its technical specifications or internal diagnostic
functions indicate that the current process conditions increase the measurement
uncertainty (i.e. during plant start-up or cleaning processes).

Deviation from normal operation, the device still works, but should be attended to
soon to ensure continued operation, e.g. build-up, corrosion, zero point
adjustment not possible or memory for data storage almost full.

1)

1) Valid for the default mappings to the diagnostic numbers

Diagnostic behavior - Analog information via current output and LED

Diagnostic behavior Meaning of the behavior

Alarm Measurement is interrupted. Mostly the measured data is invalid and the

configured failure current is set. A diagnostic message is generated.

Warning Usually, the device continues to measure. A diagnostic message is generated.

Disabled The diagnostic event is completely surpressed even if the device is not working

properly.

Diagnostics event and event text

Diagnostics event

Status signal Event number Event text

↓ ↓ ↓

Example 001 Device failure

3-digit number

The fault can be identified by means of the diagnostics event. The event text helps you by
providing information about the fault.

36 Endress+Hauser

iTHERM TrustSens TM371, TM372 Diagnostics and troubleshooting

9.4 Overview of diagnostics events

Diagnostic events are assigned to a certain diagnostic number and a status signal. The user
can change this assignment for certain diagnostic events.

Example:

Settings Device behavior

Configuration example Diagnostic

number

Default setting 143 S Warning S Measured

Manual configuration:
Status signal S is switched to
F

Manual configuration:
diagnostic behavior

Warning is switched to
Alarm

Manual configuration:

Warning is switched to
Disabled

143 F Warning F Measured

143 S Alarm S Configured

143 S

Status
signal

1)

Diagnostic
behavior
(settings)

Disabled -

Status signal
(output via HART®
protocol)

2)

Output
current

value

value

failure
current

Last valid
measured

3)

value

PV, status LED

Measured value,
UNCERTAIN

Measured value,
UNCERTAIN

Measured value,
BAD

Last valid
measured value,
GOOD

Red is
flashing

Red is
flashing

Red is
illuminated

Green is
illuminated

1) Setting is not relevant.

2) Status signal is not indicated.

3) If there is no valid measured value, it is set to the failure current

Diagnostic

number

001 1 Device failure 1. Restart device.

004 2 Sensor defective Replace device. F

047 22 Sensor limit reached 1. Check sensor.

105 26 Manual calibration

143 21 Sensordrift Alarm

144 27 Sensordrift warning

221 29 Reference sensor

Priority Short text Remedy

2. Replace electronics.

2. Check process conditions.

1. Execute calibration and reset

interval expired

limit exceeded

limit exceeded

defective

3)

calibration interval.

2. Switch off calibration counter

1. Check self calibration alarm
limits.

2. Check value of adjustment.

3. Replace device

1. Check self calibration warning
limits.

2. Check value of adjustment.

3. Replace device

Replace device. M

Diagnostics

Not

1)

Diagnostic

behavior
from the

factory

Alarm

Warning

Status

signal
(factory
default)

F Alarm

S Warning

M Warning

S Warning

M Warning

Configurable

configurable

Configurable

Not

configurable

2)

Endress+Hauser 37

Diagnostics and troubleshooting iTHERM TrustSens TM371, TM372

Diagnostic

number

Priority Short text Remedy

401 15 Factory reset active Factory reset in progress, please

wait.

402 16 Initialization active Initialization in progress, please

wait.

410 3 Data transfer failed 1. Check connection.

2. Repeat data transfer.

411 17 Up-/download active Up-/download in progress, please

wait.

435 5 Linearization faulty Check linearization. F

437 4 Configuration

Execute factory reset. F

incompatible

438 30 Dataset different 1. Check data set file.

2. Check device parameterization.

3. Download new device
parameterization.

485 18 Process variable

Deactivate simulation.
simulation active­Sensor

491 19 Output simulation -

Deactivate simulation. C
current output

495 20 Diagnostic event

Deactivate simulation. C
simulation active

501 6 Wiring error

4)

Check wiring. F

Status

signal
(factory
default)

Configurable

1)

Diagnostic

behavior
from the

factory

Not

configurable

C

C

F

C

Warning

Warning

Alarm

Warning

Alarm

Alarm

M Warning

C Warning

Warning

Warning

Alarm

Configurable

Not

configurable

2)

531 6 Factory adjustment

missing

8 Factory adjustment

missing-Sensor

9 Factory adjustment

missing-Reference

1. Contact service organization.

2. Replace device.

sensor

10 Factory adjustment

missing-Current
output

537 11 Configuration 1. Check device configuration

2. Up- and download new
configuration

12 Configuration-Sensor 1. Check sensor configuration.

13 Configuration-

2. Check device configuration.

Reference sensor

14 Configuration-Current

output

1. Check application

2. Check the current output
parameterization

801 23 Supply voltage too low Increase supply voltage. S

825 24 Operating

temperature

1. Check ambient temperature.

2. Check process temperature.

F Alarm

F Alarm

Alarm

S

Warning

38 Endress+Hauser

iTHERM TrustSens TM371, TM372 Diagnostics and troubleshooting

Not

1)

Diagnostic

behavior
from the

factory

Configurable

configurable

Status

Diagnostic

number

844 25 Process value out of

905 28 Self calibration

1) F, C, S, M, N can be configured

2) 'Alarm', 'Warning' and 'Disabled' can be configured

3) Reference sensor defective if temperature range of –45 to +200 °C (–49 to +392 °F) is exceeded. Temperature measurement continues, but self-

4) Leading error cause: CDI modem and loop are connected simultaneously, based on wrong connection (CDI modem or loop only) or defective cable

Priority Short text Remedy

1. Check process value.

specification

interval expired

calibration is permanently disabled.

plug.

2. Check application.

3. Check sensor.

1. Initiate self-calibration.

2. Deactivate self-calibration
interval monitoring.

3. Replace device

signal
(factory
default)

S Warning

M Warning

Configurable

configurable

2)

Not

9.5 Diagnostic list

If more than three diagnostic events occure simultaneously, only the messages with the
highest priorities are shown in the Diagnostics list. →  84 Characteristic feature of
the displayed priority is the status signal in the following order: F, C, S, M. If there are
several diagnostic events with the same status signal, the priority values from the table
above are used for ordering the diagnostic events, e.g.: F001 appears first, F501 appears
second and S047 appears last.

9.6 Event logbook

Diagnostic events that are no longer pending are shown in the Event logbook submenu.
→  85

9.7 Firmware history

Revision history
The firmware version (FW) on the nameplate and in the Operating Instructions indicates

the device release: XX.YY.ZZ (example 01.02.01).
XX Change to main version. No longer compatible. Changes in the device

and Operating Instructions.

YY Change to functions and operation. Compatible. Changes in the

Operating Instructions.

ZZ Bug fixing. No changes to the Operating Instructions.

Date Firmware Version Modifications Documentation

09/17 01.00.zz Original firmware BA01581T/09

Endress+Hauser 39

Maintenance iTHERM TrustSens TM371, TM372

10 Maintenance

In general, no specific maintenance is required for this device.

10.1 Cleaning

The sensor has to be cleaned as required. The cleaning can also be proceeded when the
device is installed (e.g. CIP Cleaning in Place / SIP Sterilization in Place). Care must be
taken to ensure that the sensor is not damaged during the cleaning.

The housing is resistant to typical cleaning agents from the outside. It passed the Ecolab
test.

40 Endress+Hauser

iTHERM TrustSens TM371, TM372 Repair

11 Repair

Due to its design, the device cannot be repaired.

11.1 Spare parts

Currently available spare parts for your product can be found online at:

http://www.products.endress.com/spareparts_consumables. When ordering spare parts,

please quote the serial number of the device!

Type Order number

Plug screw fitting G1/2 1.4435 60022519

Spare Part Kit Press-Screw TK40 G1/4 d6 71215757

Spare Part Kit Press-Screw TK40 G1/2 d6 71217633

Weld-in adapter G3/4 d=50, 316L, 3.1 52018765

Weld-in adapter G3/4, d=29, 316L, 3.1 52028295

G1/2 metal to metal weld in adapter 60021387

Weld in adapter M12x1.5 316L&1.4435 71405560

O-ring 14.9x2.7 VMQ, FDA, 5 pieces 52021717

Weld-in adapter G3/4 d=55, 316L 52001052

Weld-in adapter G3/4, 316L, 3.1 52011897

O-ring 21.89x2.62 VMQ, FDA, 5 pcs. 52014473

Weld-in adapter G1, d=60, 316L 52001051

Weld-in adapter G1, d=60, 316L, 3.1 52011896

Weld-in adapter G1, d=53, 316L, 3.1 71093129

O-ring 28.17x3.53 VMQ, FDA, 5 pcs. 52014472

Adapter for Ingold connection 60017887

O-ring set for Ingold connection 60018911

Grip cap flexible yellow TPE 71275424

iTHERM TK40 compression fitting TK40-

Spare Part Kit sealing TK40 XPT0001-

iTHERM TT411 thermowell TT411-

11.2 Return

The measuring device must be returned if it is need of repair or a factory calibration, or if
the wrong measuring device has been delivered or ordered. Legal specifications require
Endress+Hauser, as an ISO-certified company, to follow certain procedures when handling
products that are in contact with the medium.

To ensure safe, swift and professional device returns, please refer to the procedure and
conditions for returning devices provided on the Endress+Hauser website at

http://www.endress.com/support/return-material

11.3 Disposal

The device contains electronic components and must therefore be disposed of as electronic
waste. Please pay particular attention to the national disposal regulations in your country.
Please seperate the different components according to their material consistence.

Endress+Hauser 41

Accessories iTHERM TrustSens TM371, TM372

!30 (1.18)

16 (0.63)

34 (1.34)

15 (0.6)

G½”

M12x1.5

!7.6 (0.3)

!20 (0.8)

13 (0.51)

17 (0.67)

8 (0.31)

!18

(0.71)

G½”/
M12x1.5

37 (1.46)

AF22

G 1¼”

50 (1.97)

12 Accessories

12.1 Device-specific accessories

Device-specific accessories

Accessories Description

Welding boss with sealing taper (metal -

metal)

Welding boss for G½" and M12x1.5 thread
Metal-sealing; conical
Material of wetted parts: 316L/1.4435
Max. process pressure 16 bar (232 PSI)

Order number:

• 60021387 (G½")

• 71405560 (M12x1.5)

Dummy plug

A0006621

A0018236

Dummy plug for G½” or M12x1.5 conical metal-sealing welding boss
Material: SS 316L/1.4435

Order number:

• 60022519 (G½")

• 60021194 (M12x1.5)

A0009213-EN

Weld-in adapter for Ingold process

connections

Material of wetted parts: 316L/1.4435
Weight: 0.32 kg (0.7 lb)
Order number: 60017887

O-ring seal set

• Silicone O-ring in accordance with FDA CFR 21

• Maximum temperature: 230 °C (446 °F)

• Order number: 60018911

42 Endress+Hauser

A0008956

iTHERM TrustSens TM371, TM372 Accessories

ø

26 (1.0)

25 (1.0)

ø

29 (1.1)

30 (1.2)

G

ISO 228

¾"

ø32 (1.3)

ø

50 (2.0)

26 (1.0)
21 (0.8)

ø

32 (1.3)

G ¾

ISO 228

"

26 (1.0)

ø

55 (2.2)

21 (0.8)

ø

32 (1.3)

G ¾

ISO 228

"

ø50 (2.0)

ø53 (2.1)

47.8 (1.9)

24.6 (1.0)

30°

21 (0.8)

ø41 (1.6)

G 1"

ISO 228

Weld-in adapter for FTL31/33/20,

pipe-mounting

A0008265

1) A seal is included in the delivery.

Weld-in adapter for FTL31/33/20,

vessel-mounting

G¾", d=29 mm, without flange
Material: 316L
Roughness in μm (μin): 1.5 (59.1)
Order number: 52028295 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52021717
compliant

G¾", d=50 mm, with flange
Material: 316L
Roughness in μm (μin): 0.8 (31.5)
Order number: 52018765 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52021717
compliant
EHEDG tested and 3-A marked

1)

, FDA-

1)

, FDA-

A0008810

1) A seal is included in the delivery.

Weld-in adapter for FTL50

A0008274

1) A seal is included in the delivery.

Weld-in adapter for FTL50

G¾", d=55 mm, with flange
Material: 316L
Roughness in μm (μin): 0.8 (31.5)
Order number: 52001052 (without inspection certificate
EN10204-3.1 material)
Order number: 52011897 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52014473
compliant
Order number weld-in dummy: MVT2L0692
EHEDG tested and 3-A marked

G1", d=53 mm, without flange
Material: 316L
Roughness in μm (μin): 0.8 (31.5)
Order number: 71093129 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52014472
compliant
Order number weld-in dummy: MVT2L0691

1)

, FDA-

1)

, FDA-

1) A seal is included in the delivery.

A0011927

Endress+Hauser 43

Accessories iTHERM TrustSens TM371, TM372

ø41 (1.6)

G 1"

ISO 228

ø60 (2.4)

29.6 (1.2)

24.6 (1.0)

26 (1.02)

5 (0.2)

ø65 (2.56)

!D

20 (0.79)

35 (1.38)

Weld-in adapter for FTL50

A0008267

1) A seal is included in the delivery.

Weld-in adapter for FTL50

G1", d=60 mm, with flange
Material: 316L
Roughness in μm (μin): 0.8 (31.5)
Order number: 52001051 (without inspection certificate
EN10204-3.1 material)
Order number: 52011896 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52014472
compliant
Order number weld-in dummy: MVT2L0691
EHEDG tested and 3-A marked

G1", can be aligned
Material: 316L
Roughness in μm (μin): 0.8 (31.5)
Order number: 52001221 (without inspection certificate
EN10204-3.1 material)
Order number: 52011898 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52014424
compliant
Order number weld-in dummy: M40167

1)

, FDA-

1)

, FDA-

A0008272

1) A seal is included in the delivery.

Flexible handle cap to cover the

QuickNeck bottom part

Diameter ⌀D: 24 to 26 mm (0.94 to 1.02 in)
Material: Thermoplastic polyolefin - elastomer (TPE), free from
plasticizers
Maximum temperature: +150 °C (+302 °F)
Order number: 71275424

A0027201

Maximum process pressure for the weld-in adapters:

• 25 bar (362 PSI) at maximum 150 °C (302 °F)

• 40 bar (580 PSI) at maximum 100 °C (212 °F)

For more information on the weld-in adapters, see Technical Information (TI00426F/

00).

44 Endress+Hauser

iTHERM TrustSens TM371, TM372 Accessories

USB

FieldCare/
DeviceCare

USB

USB
driver

1

2 (WH) nc

2

1 (BN) +

4

3 (BU) -

3

4 (BK) nc

1

2 (WH) nc

2

1 (BN) +

4

3 (BU) -

3

4 (BK) nc

A

B

USB
drivers

12.2 Communication-specific accessories

Configuration kit TXU10

Commubox FXA291

Cordset M12x1, angle plug

Configuration kit for CDI communication with PC-programmable
devices. Includes interface cable for PC with USB port and M12x1
coupling (Non-Ex area).
Order code: TXU10-BD

A0028635

Connects Endress+Hauser field devices with a CDI interface (=
Endress+Hauser Common Data Interface) and the USB port of a
computer or laptop (Non-Ex area and Ex area).

For details, see "Technical Information" TI00405C



A0034600

PVC cable, 4 x 0.34 mm² (22 AWG) with M12x1 coupling; angle
plug; screw plug; length 5 m (16.4 ft); IP69K
Order number: 52024216

Core colours:

• 1 = BN brown

• 2 = WH white

• 3 = BU blue

• 4 = BK black

A0020723

Cordset M12x1, straight

PVC cable, 4 x 0.34 mm² (22 AWG) with M12x1 coupling nut from
stainless steel; straight female connector type; screw plug; length 5
m (16.4 ft); IP69K
Order number: 71217708

Core colors:

• 1 = BN brown

• 2 = WH white

• 3 = BU blue

A0020725

• 4 = BK black

Commubox FXA195 HART

For intrinsically safe HART communication with FieldCare via the
USB interface.

For details, see "Technical Information" TI00404F



A0032846

HART Loop Converter HMX50 Is used to evaluate and convert dynamic HART process variables to

analog current signals or limit values.

For details, see "Technical Information" TI00429F and



Operating Instructions BA00371F

Fieldgate FXA320 Gateway for the remote monitoring of connected 4-20 mA

measuring devices via a Web browser.

For details, see "Technical Information" TI00025S and



Operating Instructions BA00053S

Fieldgate FXA520 Gateway for the remote diagnostics and remote configuration of

connected HART measuring devices via a Web browser.

For details, see "Technical Information" TI00025S and



Operating Instructions BA00051S

Endress+Hauser 45

Accessories iTHERM TrustSens TM371, TM372

Field Xpert SFX350, 370 • Field Xpert is a powerful, compact industrial PDA based on the

Windows Embedded Handheld operating system and offering
integrated WLAN, USB, Bluetooth and infrared interfaces. This
allows it to be connected to HART and/or FOUNDATION Fieldbus
devices via a modem or gateway.

• SFX350 for configuration of field devices in Non-Ex areas

• SFX370 for configuration of field devices in Non-Ex areas and Ex
areas

For details, see Operating Instructions BA01202S



12.3 Service-specific accessories

Accessories Description

Applicator Software for selecting and sizing Endress+Hauser measuring devices:

• Calculation of all the necessary data for identifying the optimum measuring
device: e.g. pressure loss, accuracy or process connections.

• Graphic illustration of the calculation results

Administration, documentation and access to all project-related data and
parameters over the entire life cycle of a project.

Applicator is available:
Via the Internet: https://portal.endress.com/webapp/applicator

Configurator Product Configurator - the tool for individual product configuration

• Up-to-the-minute configuration data

• Depending on the device: Direct input of measuring point-specific information
such as measuring range or operating language

• Automatic verification of exclusion criteria

• Automatic creation of the order code and its breakdown in PDF or Excel output
format

• Ability to order directly in the Endress+Hauser Online Shop

The Configurator is available on the Endress+Hauser website: www.endress.com ->
Click "Corporate" -> Select your country -> Click "Products" -> Select the product
using the filters and the search field -> Open the product page -> The "Configure"
button to the right of the product image opens the Product Configurator.

W@M Life cycle management for your plant

W@M supports you with a wide range of software applications over the entire
process: from planning and procurement, to the installation, commissioning and
operation of the measuring devices. All the relevant device information, such as
the device status, spare parts and device-specific documentation, is available for
every device over the entire life cycle.
The application already contains the data of your Endress+Hauser device. Endress
+Hauser also takes care of maintaining and updating the data records.

W@M is available:
Via the Internet: www.endress.com/lifecyclemanagement

FieldCare SFE500 FDT-based plant asset management tool from Endress+Hauser.

It can configure all smart field units in your system and helps you manage them. By
using the status information, it is also a simple but effective way of checking their
status and condition.

For details, see Operating Instructions BA00027S and BA00065S



DeviceCare SFE100 Configuration tool for devices via fieldbus protocols and Endress+Hauser service

protocols.
DeviceCare is the tool developed by Endress+Hauser for the configuration of
Endress+Hauser devices. All smart devices in a plant can be configured via a point­to-point or point-to-bus connection. The user-friendly menus enable transparent
and intuitive access to the field devices.

For details, see Operating Instructions BA00027S



46 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

12.4 System components

Advanced Data Manager
Memograph M

RN221N Active barrier with power supply for safe separation of 4-20 mA standard signal

RNS221 Supply unit for powering two 2-wire measuring devices in the non-Ex area.

The Advanced Data Manager Memograph M is a flexible and powerful system for
organizing process values. The measured process values are clearly presented on
the display and logged safely, monitored for limit values and analyzed. Via
common communication protocols, the measured and calculated values can be
easily communicated to higher-level systems or individual plant modules can be
interconnected.

For details, see Technical Information TI01180R/09



circuits. Offers bidirectional HART transmission.

For details, see "Technical Information" TI00073R and Operating Instructions



BA00202R

Bidirectional communication is possible via the HART communication jacks.

For details, see "Technical Information" TI00081R and Brief Operating



Instructions KA00110R

13 Technical Data

13.1 Input

Measuring range

Pt100 thin-film (TF) –40 to +160 °C (–40 to +320 °F)

13.2 Output

Output signal

Failure information Failure information as per NAMUR NE43:

Analog output 4 to 20 mA

Digital output HART® protocol (revision 7)

Failure information is created if the measuring information is missing or not valid. A
complete list of all the errors occurring in the measuring system is created.

Underranging Linear decrease from 4.0 to 3.8 mA

Overranging Linear increase from 20.0 to 20.5 mA

Failure, e.g. sensor breakage, sensor short­circuit

≤ 3.6 mA ("low") or ≥ 21 mA ("high"), can be selected
The "high" alarm setting can be set between 21.5 mA and
23 mA, thus providing the flexibility needed to meet the
requirements of various control systems.

Endress+Hauser 47

Technical Data iTHERM TrustSens TM371, TM372

Ub

30 V

780
530

250

12 V

0

24.2 V

17.75 V

Supply voltage (V DC)

Load (Ω)

Load Maximum possible HART® communication resistance

R

b max.

output)

= (U

- 12 V) / 0.023 A (current

b max.

A0032387-EN

Linearization/transmission

Temperature-linear

behavior

Filter 1st order digital filter: 0 to 120 s, factory setting: 0 s (PV)

Protocol-specific data HART

Manufacturer ID 17 (0x11)

Device type ID 0x11CF

HART revision 7

Device description files (DTM, DD) Information and files at:

• www.endress.com/downloads

• www.fieldcommgroup.org

HART load Min. 250 Ω

HART device variables Measured value for PV (primary value)

Temperature

Measured values for SV, TV, QV (secondary, tertiary and quaternary
variable)

• SV: Device temperature

• TV: Calibration counter

• QV: Calibration deviation

Supported functions • Additional transmitter status

• NE107 diagnostics

Startup behavior / wireless HART data

Minimum start-up voltage 12 V

Start-up current 3.58 mA

Start-up time < 7 s, until the first valid measured value signal is present at the current

Minimum operating voltage 12 V

Multidrop current 4 mA

Lead time 0 s

13.3 Wiring

According to the 3-A Standard electrical connecting cables must be smooth,

DC

output

DC

corrosion-resistant and easy to clean.

48 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

Supply voltage Ub = 12 to 30 V

DC

The device may only be powered by a power supply unit with a limited energy electric
circuit in accordance with UL/EN/IEC 61010-1 chapter 9.4 or Class 2 according to UL
1310, "SELV or Class 2 cir-cuit".

Current consumption • I = 3.58 to 23 mA

• Minimum current consumption: I = 3.58 mA, multi-drop mode I =4 mA

• Maximum current consumption: I ≤ 23 mA

Overvoltage protection To protect against overvoltage in the power supply and signal/communication cables for

the thermometer electronics, Endress+Hauser offers the HAW562 surge arrester for DIN
rail mounting.

For more information see the Technical Information 'HAW562 Surge arrester'
TI01012K

13.4 Performance characteristics

Reference operating conditions

• Ambient temperature: 25 °C ± 5 °C (77 °F ± 9 °F)

• Supply voltage: 24 V

DC

Internal calibration point • 118 °C (244.4 °F) +1.2 K / –1.7 K

• Lowest possible calibration point = 116.3 °C (241.3 °F)

• Highest possible calibration point = 119.2 °C (246.6 °F)

The individual calibration point of each TrustSens device is indicated in the ex-works
calibration certificate enclosed with the shipment.

Measurement uncertainty The given uncertainty values include non-linearity and non-repeatability and correspond

to 2σ (95% confidence level according to the Gaussian distribution curve).

Uncertainty of self-calibration of digital output (HART® value) at the
calibration point.

Uncertainty of the
temperature sensor inclusive
digital output (HART® value)
at reference conditions in
delivery state.

Each iTHERM TrustSens



is calibrated and
matched by default
before shipment to
guarantee the given
accuracy.

Uncertainty of D/A converter (analog output current) 0.03 % of the measurement

Process temperature:
+20 to +135 °C (+68 to +275 °F)
+135 to +160 °C (+275 to +320 °F)
0 to +20 °C (+32 to +68 °F)
–20 to 0 °C (–4 to +32 °F)
–40 to –20 °C (–40 to –4 °F)

< 0.35 °C (0.63 °F)

< 0.22 °C (0.4 °F)
< 0.38 °C (0.68 °F)
< 0.27 °C (0.49 °F)
< 0.46 °C (0.83 °F)
< 0.8 °C (1.44 °F)

range

Endress+Hauser 49

Technical Data iTHERM TrustSens TM371, TM372

Long-term drift

Influence of ambient temperature

Pt100 sensing element < 1000 ppm/1000 h

A/D converter (digital output - HART®) < 500 ppm/1000 h

D/A converter (analog output - current) < 100 ppm/1000 h

1) This would be detected by the self-calibration

1)

1)

Long-term drift decreases at an exponential rate over time. So it may not be
extrapolated in a linear way for time spans longer than the above given values.

A/D converter (digital output - HART®) at typical
operating conditions

A/D converter (digital output - HART®) at maximum
operating conditions

D/A converter (analog output - current) ≤ 30 ppm/°C (2σ), related to the deviation from the

< 0.05 K (0.09 °F)

< 0.15 K (0.27 °F)

reference temperature

Typical operating conditions

• Ambient temperature: 0 to +40 °C (+32 to +104 °F)

• Process temperature: 0 to +140 °C (+32 to +284 °F)

• Power supply: 18 to 24 V

DC

Influence of supply voltage According to IEC 61298-2:

A/D converter (digital output - HART®) at typical
operating conditions

D/A converter (analog output - current) < 10 ppm/V

1) Related to the deviation from the reference supply voltage

Sample calculation with Pt100, measuring range +20 to +135 °C (+68 to +275 °F), ambient
temperature +25 °C (+77 °F), supply voltage 24 V:

Measured error digital 0.220 °C (0.396 °F)

Measured error D/A = 0.03 % x 150 °C (302 °F) 0.045 °C (0.081 °F)

Measured error digital value (HART): 0.220 °C (0.396 °F)

Measured error analog value (current output): √(Measured error digital² +

Measured error D/A²)

Sample calculation with Pt100, measuring range +20 to +135 °C (+68 to +275 °F), ambient
temperature +35 °C (+95 °F), supply voltage 30 V:

Measured error digital 0.220 °C (0.396 °F)

Measured error D/A = 0.03 % x 150 °C (302 °F) 0.045 °C (0.081 °F)

Influence of ambient temperature (digital) 0.050 °C (0.090 °F)

Influence of ambient temperature (D/A) = (35 °C - 25 °C) x (30 ppm/°C x 150 °C) 0.045 °C (0.081 °F)

Influence of supply voltage (digital) = (30 V - 24 V) x 15 ppm/V x 150 °C 0.014 °C (0.025 °F)

Influence of supply voltage (D/A) = (30 V - 24 V) x 10 ppm/V x 150 °C 0.009 °C (0.016 °F)

< 15 ppm/V

1)

1)

0.225 °C (0.405 °F)

50 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

Measured error digital value (HART):

√(Measured error digital² + Influence of ambient temperature (digital)² + Influence
of supply voltage (digital)²

Measured error analog value (current output):

√(Measured error digital² + Measured error D/A² + Influence of ambient
temperature (digital)² + Influence of ambient temperature (D/A)² + Influence of
supply voltage (digital)² + Influence of supply voltage (D/A)²

0.226 °C (0.407 °F)

0.235 °C (0.423 °F)

Response time Tests in water at 0.4 m/s (1.3 ft/s), according to IEC 60751; 10 K temperature step

change. t63 / t90 are defined as the time that passes until the instrument output reaches
63% / 90% of the new value.

Response time with heat transfer paste

Protection tube Shape of tip Insert t

6 mm (0.24 in) Reduced 4.3 mm (0.17 in) x 20 mm (0.79 in) 3 mm (0.12 in) 2.9 s 5.4 s

9 mm (0.35 in)

12.7 mm (¹⁄₂ in)

1) Between the insert and the protection tube.

Reduced 5.3 mm (0.21 in) x 20 mm (0.79 in) 3 mm (0.12 in) 2.9 s 5.4 s

Reduced 5.3 mm (0.21 in) x 20 mm (0.79 in) 3 mm (0.12 in) 2.9 s 5.4 s

Reduced 8 mm (0.31 in) x 32 mm (1.26 in) 6 mm (0.24 in) 10.9 s 24.2 s

1)

63

Straight 6 mm (0.24 in) 9.1 s 17.9 s

Straight 6 mm (0.24 in) 10.9 s 24.2 s

t

90

Response time without heat transfer paste

Protection tube Shape of tip Insert t

Without

protection tube

6 mm (0.24 in) Reduced 4.3 mm (0.17 in) x 20 mm (0.79 in) 3 mm (0.12 in) 7.4 s 17.3 s

9 mm (0.35 in)

12.7 mm (¹⁄₂ in)

Reduced 5.3 mm (0.21 in) x 20 mm (0.79 in) 3 mm (0.12 in) 7.4 s 17.3 s

Reduced 5.3 mm (0.21 in) x 20 mm (0.79 in) 3 mm (0.12 in) 7.4 s 17.3 s

Reduced 8 mm (0.31 in) x 32 mm (1.26 in) 6 mm (0.24 in) 30.7 s 74.5 s

- 6 mm (0.24 in) 5.3 s 10.4 s

Straight 6 mm (0.24 in) 24.4 s 54.1 s

Straight 6 mm (0.24 in) 30.7 s 74.5 s

63

Calibration Calibration of thermometers

Calibration involves comparing the measured values of a device under test (DUT) with
those of a more precise calibration standard using a defined and reproducible
measurement method. The aim is to determine the deviation of the DUT's measured values
from the true value of the measured variable. Two different methods are used for
thermometers:

• Calibration at fixed-point temperatures, e.g. at the freezing point of water at 0 °C,

• Comparison calibration against a precise reference thermometer.

The thermometer to be calibrated must display the fixed point temperature or the
temperature of the reference thermometer as accurately as possible. Temperature­controlled calibration baths or special calibration furnaces with homogeneous distribution
of temperature are typically used for thermometer calibrations. The DUT and the reference
thermometer are placed closely together into the bath or furnace at a sufficient depth.

The measurement uncertainty can increase due to heat conduction errors and short
immersion lengths. The existing measurement uncertainty is listed on the individual
calibration certificate.

t

90

Endress+Hauser 51

Technical Data iTHERM TrustSens TM371, TM372

For accredited calibrations according to IEC/ISO 17025, the measurement uncertainty
must not be twice as high as the accredited measurement uncertainty of the laboratory. If
the limit value is exceeded, only a factory calibration can be carried out.

For manual calibration in calibration baths the maximum immersion length of the
device ranges from the sensor tip to the lower part of the electronic housing. Do not
immerse the housing into the calibration bath!

A0032391

Self-calibration

The self-calibration procedure uses the Curie temperature (Tc) of a reference material as a
built-in temperature reference. A self-calibration is performed automatically, when the
process temperature (Tp) falls below the nominal Curie Temperature (Tc) of the device. At
the Curie temperature, a phase change of the reference material takes place, which is
associated with a change in its electrical properties. The electronics automatically detects
this change and simultaneously calculates the deviation of the measured Pt100­temperature to the known, physically fixed Curie temperature. The TrustSens
thermometer is calibrated. A green flashing LED light indicates the ongoing self­calibration process. Subsequently the thermometer electronics stores the results of this
calibration. The calibration data can be read via an asset management software like
FieldCare or DeviceCare. A self-calibration certificate can be created automatically. This
inline self calibration allows a continuous and repeated monitoring of changes to the
Pt100 sensor and to the electronics’ characteristics. As the inline calibration is being
performed under real ambient or process conditions (e.g. heating of electronics), the result
is closer to reality than a sensor calibration under laboratory conditions.

Process criteria for self-calibration

To ensure a valid self-calibration within the given measurement accuracy, the process
temperature characteristics needs to fulfil the criteria, which are checked by the device
automatically. Based on this, the device is ready to perform a self-calibration under the
following conditions:
– Process temperature > calibration temperature +3 °C (5.4 °F) for 25 s before cooling

down; t1 - t2.

– Cooling rate: 0.5 to 16.5 K/min (0.9 to 29.7 °F/min), while the process temperature

crosses the Curie temperature; t2 - t3 + 10 s.

The process temperature ideally declines continuously below 116 °C (240.8 °F). A valid
self-calibration process is done when the green LED flashes with a frequency 5 Hz for 5 s.

52 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

T / °C (°F)

t

123 °C
(253.4 °F)

> 25 s

< 116 °C (240.8 °F)

-16.5 K/min
(-29.7 °F/min)

t1

t2

1

t3

t3

116 °C
(240.8 °F)

-0.5 K/min
(-0.9 °F/min)

2

A0032839

 10 Needed process temperature profile for self-calibration

1 Process temperature 123 °C (253.4 °F)
2 Allowed self-calibration range

Calibration monitoring

Available in conjunction with Advanced Data Manager Memograph M (RSG45). →  47

Application package:

• Up to 20 devices can be monitored via the HART interface

• Self-calibration data displayed on screen or via the Web server

• Generation of a calibration history

• Creation of a calibration protocol as an RTF file directly at the RSG45

• Evaluation, analysis and further processing of the calibration data using "Field Data
Manager" (FDM) analysis software

Insulation resistance Insulation resistance ≥ 100 MΩ at ambient temperature.

Insulation resistance between the terminals and the outer jacket is measured with a
minimum voltage of 100 V DC.

13.5 Environment

Ambient temperature range

Ambient temperature Ta–40 to +60 °C (–40 to +140 °F)

Maximum electronics
temperature T

–40 to +85 °C (–40 to +185 °F)

Storage temperature range T = –40 to +85 °C (–40 to +185 °F)

Climate class As per IEC 60654-1, Class Dx

Endress+Hauser 53

Technical Data iTHERM TrustSens TM371, TM372

Degree of protection • IP54 for the version without protection tube provided for installation in an existing

protection tube

• IP67/68 for housing with LED status indication

• IP69K for housing without LED status indication and only if appropriate cord-set with
M12x1 coupling is connected. →  45

The specified rating IP67/68 or IP69K for the compact thermometer is only assured
when an approved M12 connector with a suitable IP rating is installed according to its
manual.

Shock and vibration resistance

Endress+Hauser temperature sensors meet the requirements of IEC 60751 which specify
shock and vibration resistance of 3g in the range from 10 to 500 Hz. This also applies for
the quick-fastening iTHERM QuickNeck.

Electromagnetic compatibility (EMC)

EMC to all relevant requirements of the IEC/EN 61326 - series and NAMUR
Recommendation EMC (NE21). For details, refer to the Declaration of Conformity. All tests
were passed both with and without ongoing HART® communication.

All EMC measurements were performed with a turn down (TD) = 5:1. Maximum
fluctuations during EMC- tests: < 1% of measuring span.

Interference immunity to IEC/EN 61326 - series, requirements for industrial areas.

Interference emission to IEC/EN 61326 - series, electrical equipment Class B.

13.6 Mechanical construction

Design, dimensions All dimensions in mm (in). The design of the thermometer depends on the protection tube

version used:

• Thermometer without a protection tube

• Diameter 6 mm (0.24 in)

• Diameter 9 mm (0.35 in)

• Diameter 12.7 mm (¹⁄₂ in)

• T-piece and corner-piece protection tube version as per DIN 11865 / ASME BPE 2012
for weld-in

Various dimensions, such as the immersion length U for example, are variable values
and are therefore indicated as items in the following dimensional drawings.

Variable dimensions:

Item Description

E Extension neck length, variable depending on the configuration or predefined for the version with

iTHERM QuickNeck

L Protection tube length (U+T)

B Protection tube bottom thickness: predefined, depends on protection tube version (see also the

individual table data)

T Length of protection tube shaft: variable or predefined, depends on protection tube version (see

also the individual table data)

U Immersion length: variable, depending on the configuration

⌀ID Insert diameter 6 mm (0.24 in) or 3 mm (0.12 in)

54 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

U

"31.5
(1.24)

71 (2.8)

U

E = 45

(1.77)

"31.5
(1.24)

"31.5
(1.24)

121 (4.76)

U

15 (0.6)

M24
x1.5

117 (4.61)

U

12 (0.47)

"31.5
(1.24)

G3/8"

U

"31.5
(1.24)

131 (5.16)

27 (1.06)

1 2 3 5

6

" ID

" ID " ID

" ID " ID

"31.5

(1.24)

121 (4.76)

" ID

"9

(0.35)

G¼“

U

E = 70 (2.56)

7

4

"31.5
(1.24)

121 (4.76)

" ID

"9

(0.35)

U

E

G3/8”

Without protection tube

For installation with compression fitting TK40 as process connection and the insert in direct contact with the process or in
an existing protection tube.

1 Thermometer without extension neck, for mounting with adjustable compression fitting TK40, spherically and cylindrically, only ⌀ID = 6 mm
2 Thermometer with extension neck, for mounting with compression fitting TK40 in fix position, only ⌀ID = 6 mm
3 Thermometer with compression fitting TK40 fixed by extension neck, connection thread M24x1.5, ⌀ID = 6 mm
4 Thermometer with neck tube TE411, G3/8" thread adapter nut
5 Thermometer with M24x1.5 female thread for protection tube connection, e.g. TT411, ⌀ID = 3 mm or 6 mm
6 Thermometer with G3/8" female thread for protection tube connection, e.g. TT411, ⌀ID = 3 mm or 6 mm
7 Thermometer with iTHERM QuickNeck top part for protection tube with QuickNeck connection, ⌀ID = 3 mm or 6 mm

Item Description

U

(protection

tube)

T

(protection

tube)

E Length of the extension neck at point of installation (provided one is available)

B

(protection

tube)

Pay attention to the following equations when calculating the immersion length U for immersion into a protection tube
TT411 already available:

Version 5 U = U

Version 3, 4, 6 and 7 U = U

Immersion length of the protection tube available at point of installation

Shaft length of protection tube available at point of installation

Base thickness of protection tube

(protection tube)

(protection tube)

+ T

(protection tube)

+ T

(protection tube)

+ E + 3 mm - B

+ 3 mm - B

(protection tube)

(protection tube)

A0031214

Endress+Hauser 55

Technical Data iTHERM TrustSens TM371, TM372

!6

(0.24)

T

U

1

3

4

5

6

7

8

9

11

E = 34 (1.34)

117 (4.61)

131 (5.16)

15 (0.59)

E

T

U

2

B

10

With protection tube diameter 6 mm (0.24 in)

A0031254

1 Thermometer with extension neck and process connection as clamp version
2 Thermometer without extension neck and process connection as clamp version
3 Without process connection
4 Process connection version as spherical compression fitting TK40
5 Process connection version as metal sealing system M12x1
6 Process connection version as metal sealing system G½"
7 Process connection version as cylindrical weld-in adapter 12 x 40 mm
8 Process connection version as cylindrical weld-in adapter 30 x 40 mm
9 Process connection version as spherical-cylindrical weld-in adapter 30 x 40 mm
10 Process connection version as spherical weld-in adapter 25 x mm
11 Thermometer with quick-fastening iTHERM QuickNeck and process connection as sanitary connection (clamp

version)

G3/8" thread for protection tube connection

Item Version Length

Without extension neck -

Replaceable extenstion neck 9 mm (0.35 in) -

Extension neck E

Length of protection tube

1)

shaft T

iTHERM QuickNeck 34 mm (1.34 in)

Clamp DN12 according to ISO 2852 24 mm (0.94 in)

Clamp DN25/DN40 according to ISO 2852 21 mm (0.83 in)

Without process connection (only G3/8" thread), where
necessary with compression fitting TK40

Metal sealing system M12x1 46 mm (1.81 in)

Metal sealing system G½" 60 mm (2.36 in)

Cylindrical weld-in adapter 12 mm (0.47 in) 55 mm (2.17 in)

Cylindrical weld-in adapter 30 mm (1.18 in) 55 mm (2.17 in)

variable, depending
on the
configuration

12 mm (0.47 in)

56 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

Item Version Length

Spherical-cylindrical weld-in adapter 58 mm (2.28 in)

Spherical weld-in adapter 47 mm (1.85 in)

Tri-clamp (0.5"-0.75") 24 mm (0.94 in)

Microclamp (DN8-18) 23 mm (0.91 in)

Sanitary connection DN25/DN32/DN40 according to DIN
11851

Immersion length U Independent of the version

Bottom thickness B Reduced tip 4.3 mm (0.17 in) 2 mm (0.08 in)

1) Depends on the process connection

29 mm (1.14 in)

Variable, depending
on the
configuration

Endress+Hauser 57

Technical Data iTHERM TrustSens TM371, TM372

U

!9

(0.35)

T

U

T = 85

(3.35)

1

2

!9 (0.35)

B

B

!15 (0.6)

3 4 5 6 7 8

159 10 11 12 13

121 (4.76)

131 (5.16)

14

With protection tube diameter 9 mm (0.35 in)

1 Thermometer with extension neck, process connection as clamp version
2 Process connection version as cylindrical weld-in adapter 30 x 40 mm
3 Process connection version as spherical-cylindrical weld-in adapter 30 x 40 mm
4 Process connection version as spherical weld-in adapter 25 x mm
5 Process connection version as sanitary connection according to DIN 11851
6 Process connection version as aseptic pipe union according to DIN 11864-1 Form A
7 Process connection version as metal sealing system G½"
8 Process connection version as thread according to ISO 228 for Liquiphant weld-in adapter
9 Process connection version APV Inline
10

Process connection version Varivent
11 Process connection version Ingold connection
12 Process connection to SMS 1147
13 Process connection version Neumo Biocontrol
14 Process adapter D45
15 Thermometer with quick-fastening iTHERM QuickNeck and process connection, as clamp version for example

®

A0031343

58 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

Item Version Length

Extension neck E No separate extension neck available -

Without quick-fastening iTHERM QuickNeck independent of the process connection 85 mm (3.35 in)

Without quick-fastening iTHERM QuickNeck in combination with Ingold connection
25 mm (0.98 in) x 46 mm (1.81 in)

With quick-fastening iTHERM QuickNeck, depending on the process connection:

SMS 1147, DN25 40 mm (1.57 in)

SMS 1147, DN38 41 mm (1.61 in)

SMS 1147, DN51 42 mm (1.65 in)

Varivent®, type F, D = 50 mm (1.97 in)
Varivent®, type N, D = 68 mm (2.67 in)

Varivent®, type B, D = 31 mm (1.22 in) 56 mm (2.2 in)

Thread G1" according to ISO 228 for Liquiphant weld-in adapter 77 mm (3.03 in)

Spherical-cylindrical weld-in adapter 70 mm (2.76 in)

Cylindrical weld-in adapter 67 mm (2.64 in)

Aseptic pipe union according to DIN11864-A, DN25

Length of protection
tube shaft T

Immersion length U Independent of the version

Bottom thickness B

Aseptic pipe union according to DIN11864-A, DN40

Sanitary connection according to DIN 11851, DN32

Sanitary connection according to DIN 11851, DN40

Sanitary connection according to DIN 11851, DN50

Clamp according to ISO 2852, DN12

Clamp according to ISO 2852, DN25 37 mm (1.46 in)

Clamp according to ISO 2852, DN40

Clamp according to ISO 2852, DN70

Microclamp (DN18) 47 mm (1.85 in)

Tri-clamp (0.75") 46 mm (1.81 in)

Ingold connection 25 mm (0.98 in) x 30 mm (1.18 in) 78 mm (3.07 in)

Ingold connection 25 mm (0.98 in) x 46 mm (1.81 in) 94 mm (3.7 in)

Metal sealing system G½" 77 mm (3.03 in)

APV-Inline, DN50 51 mm (2.01 in)

Reduced tip 5.3 mm (0.21 in)x 20 mm (0.79 in)

Straight tip

100 mm (3.94 in)

52 mm (2.05 in)

45 mm (1.77 in)

47 mm (1.85 in)

48 mm (1.89 in)

39 mm (1.54 in)Clamp according to ISO 2852, DN63.5

Variable, depending
on the configuration

2 mm (0.08 in)

Endress+Hauser 59

Technical Data iTHERM TrustSens TM371, TM372

U

T

B

!12.7

(0.5)

B

T

U

43

1

5 6 7 8

E = 34 (1.34)

15 (0.59)

117 (4.61)

131 (5.16)

11 (0.43)

T

U

E

2

With protection tube diameter 12.7 mm (¹⁄₂ in)

A0031372

1 Thermometer with standard extension neck, thread and process connection as clamp version
2 Thermometer with extension neck and process connection as clamp version
3 Process connection version as cylindrical weld-in adapter  12.7 mm (½ in)
4 Process connection version as spherical weld-in adapter 25 mm (1 in)
5 Process connection version as sanitary connection according to DIN 11851
6 Thread according to ISO 228 for Liquiphant weld-in adapter
7

Process connection version Varivent

8 Thermometer with quick-fastening iTHERM QuickNeck and process connection, as clamp version for example

®

• G3/8" thread for protection tube connection

• Protection tube made from solid bar stock drilled for L ≤ 200 mm (7.87 in)

• Welded protection tube for L > 200 mm (7.87 in)

Item Version Length

Without extension neck -

9 mm (0.35 in) -

Extension neck E

Length of protection tube
shaft T

Immersion length U Independent of the process connection

Bottom thickness B

Replaceable extension neck

iTHERM QuickNeck 34 mm (1.34 in)

Weld-in adapter, cylindrical, 12.7 mm (¹⁄₂ in) 12 mm (0.47 in)

All other process connections 65 mm (2.56 in)

Reduced tip 5.3 mm (0.21 in)x 20 mm (0.79 in) 2 mm (0.079 in)

Reduced tip 8 mm (0.31 in)x 32 mm (1.26 in) 4 mm (0.16 in)

Straight tip 6 mm (0.24 in)

variable, depending on
the configuration

Variable, depending on
the configuration

60 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

1

2

3

4

117 (4.61)

82.7 (3.26)

E

15 (0.6)

131 (5.16)

11 (0.43)

0.7 (0.03)

E = 34 (1.34)

!4.5 (0.18)

11 (0.43)

G3/8" G3/8"

With tee- or elbow piece protection tube version

1 Thermometer with extension neck and tee-piece protection tube
2 Version with tee-piece protection tube
3 Version with elbow piece
4 Thermometer with quick-fastening iTHERM QuickNeck and elbow piece protection tube

Item Version Length

Without extension neck -

Replaceable extension neck 9 mm (0.35 in) -

Extension neck E

iTHERM QuickNeck 34 mm (1.34 in)

Bottom thickness B Independent of the version 0.7 mm (0.03 in)

Immersion length U Independent of the version 82.7 mm (3.26 in)

variable, depending
on the
configuration

• Pipe sizes according to DIN11865 series A (DIN), B (ISO) and C (ASME BPE)

• Nominal diameters > DN25, with 3-A symbol

• IP69K protection class

• Material 1.4435+316L, Delta ferrite content <0.5%

• Temperature measurement range: –60 to +200 °C (–76 to +392 °F)

• Pressure range: PN25 according to DIN11865

Due to the small immersion length U in pipes with a small nominal diamter, the use
of iTHERM QuickSens inserts is recommended.

A0031515

Endress+Hauser 61

Technical Data iTHERM TrustSens TM371, TM372

Possible combinations of the protection tube versions with the available process
connections and quick-fastening iTHERM QuickNeck

Process connection and size

Without process connection (for installation with
compression fitting)

Protection tube diameter

6 mm (0.24 in)

2)

9 mm (0.35 in) 12.7 mm (¹⁄₂ in)

 - - -

iTHERM QuickNeck for 9 mm

2)

(0.35 in)

Process adapter D45 -  - -

Weld-in adapter

Cylindrical 12.7 mm (0.5 in) - -  -

Cylindrical 30 x 40 mm

 - 



Cylindrical 12 x 40 mm - - -

Spherical-cylindrical 30 x 40 mm   - 

Spherical 25 mm (0.98 in)    -

Clamp according to ISO 2852

Microclamp/Tri-clamp DN18 (0.75 in)

-

 

DN12 - 21.3 

DN25 -38 (1 - 1.5 in)

   

DN40 - 51 (2 in)

DN63.5 (2.5 in)

-   

DN70 - 76.5 (3 in)

Sanitary connection according to DIN 11851

DN25



DN32, DN40

 

DN50 -

Aseptic pipe union according to DIN 11864-1 Form A

DN25, DN40 -  - 

Metal sealing system

M12x1



-

-

G½"  

Thread according to ISO 228 for Liquiphant weld-in adapter

G¾" for FTL31/33/20

G¾" for FTL50 -

-  

G1" for FTL50 

APV Inline

DN50 -  - 

Varivent

®

Type B, 31 mm; Type F, 50 mm ; Type N, 68 mm -   

Ingold connection

25 x 30 mm or 25 x 46 mm -  - 

SMS 1147

DN25, DN38, DN51 -  - 

1)



-



-

-

62 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

Process connection and size

6 mm (0.24 in)

Neumo Biocontrol

D25 PN16, D50 PN16, D65 PN16 -  - -

1) In the case of 6 mm (0.24 in) and 12.7 mm (½ in) diameters, the iTHERM QuickNeck is available for all process connection versions.

2) All versions available with iTHERM QuickNeck

Protection tube diameter

2)

9 mm (0.35 in) 12.7 mm (¹⁄₂ in)

iTHERM QuickNeck for 9 mm

2)

(0.35 in)

1)

Weight 0.2 to 2.5 kg (0.44 to 5.5 lbs) for standard options.

Material The temperatures for continuous operation specified in the following table are only

intended as reference values for use of the various materials in air and without any
significant compressive load. The maximum operating temperatures can be reduced
considerably in cases where abnormal conditions such as high mechanical load occur or in
aggressive media.

Recommended

Designation Short form

AISI 316L
(corresponds to

1.4404
or 1.4435)

1.4435+316L, delta
ferrite < 1% or <

0.5%

X2CrNiMo17-13-2,
X2CrNiMo18-14-3

With regard to analytical limits, the specifications of both materials (1.4435 and 316L)
are met simultaneously. In addition, the delta ferrite content of the wetted parts is
limited to <1% - including the welding seams (following Basel Standard II); or <0.5%

max. temperature
for continuous use
in air

650 °C (1 202 °F)

1)

Properties

• Austenitic, stainless steel

• High corrosion resistance in general

• Particularly high corrosion resistance in
chlorine-based and acidic, non-oxidizing
atmospheres through the addition of
molybdenum (e.g. phosphoric and
sulfuric acids, acetic and tartaric acids
with a low concentration)

• Increased resistance to intergranular
corrosion and pitting

Surface roughness

1) Can be used to a limited extent up to 800 °C (1472 °F) for low compressive loads and in non-corrosive
media. Contact your Endress+Hauser sales team for further information.

Values for wetted surfaces:

Mechanically polished surface Ra ≤ 0.76 µm (30 µin)

Mechanically polished surface

Mechanically polished surface and electropolished Ra ≤ 0.38 µm (15 µin)+ electropolished

1) Exception: internal welding seams of the tee- and elbow pieces

2) Not compliant with ASME BPE

1)

2)

Ra ≤ 0.38 µm (15 µin)

Endress+Hauser 63

Technical Data iTHERM TrustSens TM371, TM372

!d

U

U

U

h

!d

!d

h

!d

h

!d

1 2

3

4

5

U

T

U

T

T

T

h

A

B

U

!d

!D

1

2

R0.4

R0.4

!i

!a

Protection tube Process connections

All dimensions in mm (in).

For welding in

Type Version Dimensions Technical properties

Weld-in adapter

1: Cylindrical

2: Cylindrical

3: Cylindrical d x h = 30 mm (1.18 in) x 40 mm (1.57 in)

4: Spherical-

cylindrical

5: Spherical d = 25 mm (0.98 in)

1)

d = 12.7 mm (¹⁄₂ in), U = immersion length

from lower edge of thread,

T = 12 mm (0.47 in)

2)

d x h = 12 mm (0.47 in) x 40 mm (1.57 in),

T = 55 mm (2.17 in)

d x h = 30 mm (1.18 in) x 40 mm (1.57 in)

h = 24 mm (0.94 in)

• P

depends on the weld-in

max.

process

• 3-A marked and EHEDG
certification

• ASME BPE compliance

1) For protection tube 12.7 mm (½ in)

2) For protection tube 6 mm (0.24 in)

Releasable process connection

Sanitary connection according to DIN 11851

1 Centering ring
2 Sealing ring

1)

Version

DN25

DN32 50 mm

A0009569

Type Technical properties

• 3-A marked and EHEDG
certification (only with
EHEDG-certified and self­centering sealing ring).

• ASME BPE compliance

A0009561

Dimensions

D A B i a

44 mm

(1.73 in)

(1.97 in)

30 mm

(1.18 in)

36 mm

(1.42 in)

10 mm

(0.39 in)

10 mm

(0.39 in)

26 mm

(1.02 in)

32 mm

(1.26 in)

29 mm

(1.14 in)

35 mm

(1.38 in)

40 bar (580 psi)

40 bar (580 psi)

P

max.

64 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

!D

h

U

!d

!i

!a

!D

U

!d

!a

!d

U

!D

R0.8

R0.5

0.8 ± 0.1

2.16 ± 0.1

R1.2

R0.8

0.4

1.6

A

A: Microclamp

A: Tri-clamp

Type Technical properties

DN40 56 mm

(2.2 in)

DN50 68 mm

(2.68 in)

1) Pipes in accordance with DIN 11850

42 mm

(1.65 in)

54 mm

(2.13 in)

10 mm

(0.39 in)

11 mm

(0.43 in)

38 mm
(1.5 in)

50 mm

(1.97 in)

41 mm

(1.61 in)

53 mm

(2.1 in)

40 bar (580 psi)

25 bar (363 psi)

Type Version

Aseptic pipe union according to DIN

11864-1, Form A

Type

Clamp according to ISO 2852

A0009562

DN8-18 (0.5"-0.75")

Dimensions

d D i a h

DN25 26 mm

(1.02 in)

DN40 38 mm

(1.5 in)

42.9 mm
(1.7 in)

54.9 mm

(2.16 in)

26 mm

(1.02 in)

38 mm

(1.5 in)

29 mm

(1.14 in)

41 mm

(1.61 in)

9 mm

(0.35 in)

10 mm

(0.39 in)

Version Dimensions

1)

d:

Microclamp

2)

3)

D a

-

25 mm (0.98 in)

Tri-clamp DN8-18

(0.5"-0.75")

DN12-21.3 34 mm (1.34 in)

DN25-38 (1"-1.5") 50.5 mm (1.99 in)

-

16 to 25.3 mm

(0.63 to 0.99 in)

29 to 42.4 mm

(1.14 to 1.67 in)

DN40-51 (2") 64 mm (2.52 in) 44.8 to 55.8 mm

(1.76 to 2.2 in)

DN63.5 (2.5") 77.5 mm (3.05 in) 68.9 to 75.8 mm

(2.71 to 2.98 in)

DN70-76.5 (3") 91 mm (3.58 in) > 75.8 mm (2.98 in) • P

Technical properties

• P

= 40 bar (580 psi)

max.

• 3-A marked and EHEDG
certification

• ASME BPE compliance

Technical properties

• P

= 16 bar (232 psi),

max.

depends on clamp ring and
suitable seal

• 3-A marked

• P

= 16 bar (232 psi),

max.

depends on clamp ring and
suitable seal

• 3-A marked and EHEDG
certification (combined with
Hyjoin PEEK/stainless steel
seal or Dupont de Nemours
Kalrez/stainless steel seal)

• ASME BPE compliance

= 16 bar (232 psi),

max.

depends on clamp ring and
suitable seal

• 3-A marked

• ASME BPE compliance

4)

A0009566

A Different seal geometries for

1) Pipes in accordance with ISO 2037 and BS 4825 Part 1

2) Microclamp (not in ISO 2852); no standard pipes

3) DN8 (0.5") only possible with protection tube diameter = 6 mm (0.24 in)

Microclamp and Tri-clamp

4) Not for DN12-21.3

Endress+Hauser 65

Technical Data iTHERM TrustSens TM371, TM372

U

14

(0.55)

22 (0.87)

M12

1.5x

!10

(0.4)

8 (0.3)

!6

(¼)

G3/8"

T = 46 (1.81)

20°

U

14

(0.55)

37 (1.46)

G½”

!18

(0.71)

8 (0.31)

!6 (¼)

G3/8"

T = 60 (2.36)

22.5°

U

14

(0.55)

37 (1.46)

G½”

"18 (0.71)

8 (0.31)

"9 (0.35)

T

45°

U

35 (1.38)

20

(0.79)

5 (0.20)

!45 (1.77)

!50 (1.97)

U

L1

1

G

A

Type Version Technical properties

Metal sealing system

M12x1.5

G½"

Protection tube diameter

6 mm (0.24 in)

P

= 16 bar (232 psi)

max.

Maximum torque =



10 Nm (7.38 lbf ft)

A0009574

-

Type Version Technical properties

Process adapter

D45 • 3-A marked

A0020856

Protection tube diameter

9 mm (0.35 in)

A0009571

P

= 16 bar (232 psi)

max.

Maximum torque =



10 Nm (7.38 lbf ft)

• EHEDG certification

A0034881

Dimensions

Type Version G

Thread according to ISO 228 (for weld-in

adapter)

66 Endress+Hauser

A0009572

G¾" for

FTL31/33/20

adapter

G¾" for FTL50

adapter

G1" for FTL50-

adapter

L1 thread

length

16 mm

(0.63 in)

18.6 mm
(0.73 in)

A 1 (SW/AF)

25.5 mm (1 in) 32

29.5 mm
(1.16 in)

41

Technical properties

• P

= 25 bar (362 psi) at

max.

max. 150 °C (302 °F)

• P

= 40 bar (580 psi) at

max.

max. 100 °C (212 °F)

• 3-A marked and EHEDG
certification

• ASME BPE compliance

iTHERM TrustSens TM371, TM372 Technical Data

h

!d

M

!A

!B

U

U

!D

!B

!A

h

U

!D

!i

!a

Type Version

APV Inline

A0018435

Type Version

®

Varivent

d A B M h

DN50

69 mm

(2.72 in)

D A B h P

Type B 31 mm

(1.22 in)

Type F 50 mm

(1.97 in)

Type N 68 mm

(2.67 in)

Dimensions

Technical properties

• P

= 25 bar (362 psi)

99.5 mm
(3.92 in)

82 mm

(3.23 in)

2xM8

19 mm

(0.75 in)

max.

• 3-A marked and EHEDG
certification

• ASME BPE compliance

Dimensions Technical properties

max.

105 mm

(4.13 in)

145 mm

(5.71 in)

165 mm

(6.5 in)

- 22 mm

135 mm
(5.31 in)

155 mm

(6.1 in)

(0.87 in)

24 mm

(0.95 in)

24.5 mm
(0.96 in)

10 bar

(145 psi)

• 3-A marked and EHEDG
certification

• ASME BPE compliance

A0021307

The VARINLINE® housing connection flange is suitable for weld-in into the conical or torispherical head in tanks or containers with a small



diameter (≤ 1.6 m (5.25 ft)) and up to a wall thickness of 8 mm (0.31 in).

Type Technical properties

Varivent® for VARINLINE® housing for installation in pipes

• 3-A marked and EHEDG
certification

• ASME BPE compliance

A0009564

Dimensions

Version

D i a

P

max.

DN40: 38 mm (1.5 in) DN40: 41 mm (1.61 in)

DN50: 50 mm (1.97 in) DN50: 53 mm (2.1 in)

DN40 to DN65:

16 bar (232 psi)

DN65: 66 mm (2.6 in) DN65: 70 mm (2.76 in)

Type N, according to DIN

11866, series A

Endress+Hauser 67

68 mm (2.67 in)

DN80: 81 mm (3.2 in) DN80: 85 mm (3.35 in)

DN100: 100 mm (3.94 in) DN100: 104 mm (4.1 in)

DN125: 125 mm (4.92 in) DN125: 129 mm (5.08 in)

DN150: 150 mm (5.9 in) DN150: 154 mm (6.06 in)

DN80 to DN150:

10 bar (145 psi)

Technical Data iTHERM TrustSens TM371, TM372

!D

!3.1
(0.12)

!4.5 (0.18)

G3/8”

L

!18 (0.71)

s

83 (3.26)

0.7 (0.03)

Version

Type N, according to EN

ISO 1127, series B

Type N, according to DIN

11866, series C

Type N, according to DIN

11866, series C

68 mm (2.67 in)

68 mm (2.67 in)

68 mm (2.67 in)

Advanced tee-piece (no welds, no dead legs)

Type Version

Tee-piece for weld-in as per DIN 11865

(part A, B and C)

A0035898

Dimensions

D i a

38.4 mm (1.51 in) 42.4 mm (1.67 in)

44.3 mm (1.75 in) 48.3 mm (1.9 in)

56.3 mm (2.22 in) 60.3 mm (2.37 in)

72.1 mm (2.84 in) 76.1 mm (3 in)

82.9 mm (3.26 in) 42.4 mm (3.5 in)

108.3 mm (4.26 in) 114.3 mm (4.5 in)

OD 1½": 34.9 mm (1.37 in) OD 1½": 38.1 mm (1.5 in)

OD 2": 47.2 mm (1.86 in) OD 2": 50.8 mm (2 in)

OD 2½": 60.2 mm (2.37 in) OD 2½": 63.5 mm (2.5 in)

OD 3": 73 mm (2.87 in) OD 3": 76.2 mm (3 in)

OD 4": 97.6 mm (3.84 in) OD 4": 101.6 mm (4 in)

Dimensions in mm (in)

D L s

Part A DN10 PN25 13 mm

(0.51 in)

DN15 PN25 19 mm

(0.75 in)

DN20 PN25 23 mm

(0.91 in)

DN25 PN25 29 mm

(1.14 in)

DN32 PN25 32 mm

(1.26 in)

Part B DN13,5 PN25 13.5 mm

(0.53 in)

DN17,2 PN25 17.2 mm

DN21,3 PN25 21.3 mm

DN26,9 PN25 26.9 mm

DN33,7 PN25 33.7 mm

Part

DN12,7 PN25

2)

C

(½")

DN19,05

PN25 (¾")

DN25,4 PN25

(1")

DN38,1 PN25

(1½")

(0.68 in)

(0.84 in)

(1.06 in)

(1.33 in)

12.7 mm
(0.5 in)

19.05 mm
(0.75 in)

25.4 mm
(1 in)

38.1 mm

(1.5 in)

48 mm

(1.89 in)

1)

1.5 mm

(0.06 in)

1.6 mm

(0.063 in)

2 mm

(0.08 in)

1.65 mm

(0.065 in)

P

max.

42.4 mm (1.67 in) to

60.3 mm (2.37 in):
16 bar (232 psi)

76.1 mm (3 in) to

114.3 mm (4.5 in):
10 bar (145 psi)

OD 1½" to OD 2½":

16 bar (232 psi)

OD 3" to OD 4": 10 bar (145 psi)

Technical properties

• P

= 25 bar (362 psi)

max.

• 3-A marked for > DN25

1) Wall thickness

2) Dimensions as per ASME BPE 2012

68 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

!D

!3.1
(0.12)

83 (3.26)

0.7 (0.03)

!4.5

(0.18)

G3/8”

L1

L2

!D

U

x

4

(0.16)

h

!D

G1¼“

Advanced elbow piece (no welds, no dead legs)

Type Version

Elbow piece for weld-in as per DIN 11865

(part A, B and C)

A0035899

D L1 L2 s

Part A DN10 PN25 13 mm

(0.51 in)

DN15 PN25 19 mm

(0.75 in)

DN20 PN25 23 mm

(0.91 in)

DN25 PN25 29 mm

(1.14 in)

DN32 PN25 35 mm

(1.38 in)

Part B DN13,5

PN25

DN17,2

PN25

DN21,3

PN25

DN26,9

PN25

DN33,7

PN25

Part C DN12,7

PN25 (½")

DN19,05

PN25 (¾")

DN25,4

PN25 (1")

DN38,1

PN25 (1½")

2)

13.5 mm
(0.53 in)

17.2 mm
(0.68 in)

21.3 mm
(0.84 in)

26.9 mm
(1.06 in)

33.7 mm
(1.33 in)

12.7 mm

(0.5 in)

19.05 mm
(0.75 in)

25.4 mm
(1 in)

38.1 mm

(1.5 in)

Dimensions

24 mm

(0.95 in)

25 mm

(0.98 in)

27 mm

(1.06 in)

30 mm

(1.18 in)

33 mm

(1.3 in)

32 mm

(1.26 in)

34 mm

(1.34 in)

36 mm

(1.41 in)

29 mm

(1.14 in)

32 mm

(1.26 in)

24 mm

(0.95 in)

25 mm

(0.98 in)

28 mm

(1.1 in)

35 mm

(1.38 in)

1)

1.5 mm

(0.06 in)

1.6 mm

(0.063 in)

2.0 mm

(0.08 in)

1.65 mm

(0.065 in)

Technical properties

• P

= 25 bar (362 psi)

max.

• 3-A marked for > DN25

1) Wall thickness

2) Dimensions as per ASME BPE 2012

Type Version, dimensions D x h Technical properties

Ingold connection

25 mm (0.98 in) x 30 mm (1.18 in)

x = 1.5 mm (0.06 in)

25 mm (0.98 in) x 46 mm (1.81 in)

x = 6 mm (0.24 in)

A0009573

P

= 25 bar (362 psi)

max.

A seal is included in the
delivery
Material V75SR: FDA
compliant, 3-A compliant, USP
Class VI compliant

Endress+Hauser 69

Technical Data iTHERM TrustSens TM371, TM372

U

1

2
3

h

!D

!A

U

h

!D

!A

M

!B

Type Version

SMS 1147 DN25 32 mm

DN38 48 mm

DN51 60 mm

A0009568

1 Thread adapter nut
2 Sealing ring
3 Counterpart connection

The counterpart connection must fit the sealing ring and fix it in place.



Type Version

Neumo Biocontrol

A0018497

D25

PN16

D50

PN16

D65

PN25

A B D d h

64 mm

(2.52 in)

90 mm

(3.54 in)

120 mm

(4.72 in)

Dimensions

D A h

35.5 mm

(1.26 in)

(1.89 in)

(2.36 in)

50 mm

(1.97 in)

70 mm

(2.76 in)

95 mm

(3.74 in)

(1.4 in)

55 mm

(2.17 in)

65 mm

(2.56 in)

Dimensions

30.4 mm
(1.2 in)

49.9 mm

(1.97 in)

67.9 mm

(2.67 in)

7 mm

(0.28 in)

9 mm

(0.35 in)

11 mm

(0.43 in)

7 mm (0.28 in)

8 mm (0.31 in)

9 mm (0.35 in)

20 mm

(0.79 in)

27 mm

(1.06 in)

Technical properties

P

= 6 bar (87 psi)

max.

Technical properties

• P

= 16 bar (232 psi)

max.

• 3-A marked

70 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

!di

!D

!di

!D

h

h

!d

!d

!7 (0.28)

2 (0.08)

20 (0.8)

D2 = !5.3

(0.21)

!3.2

(0.13)

2 (0.08)

40 (1.6)

20

(0.8)

D2 = !6.6

(0.26)

!4.1

(0.16)

2 (0.08)

20 (0.8)

D2 = !5.3

(0.21)

!3.2

(0.13)

2 (0.08)

6 (0.24)

D2 = !8

(0.31)

4

(1.6)

20 (0.8)

D2 = !4.3

(0.17)

2 (0.08)

2 31

!D1

!D1

!!D1 =

D2

!D1

!D1

!D1

!3.3

(0.13)

!8 (0.31) /

1

!6.6 (0.26)

32 (1.26)

!6.4

(0.25)

!!D1 =

D2

Compression fitting

Type

Version Dimensions

Spherical or cylindrical di D h

Compression fitting TK40 for weld-in

Spherical

Ferrule material PEEK or

316L

Thread G¼"

Cylindrical

Ferrule material Elastosil®

Thread G½"

A0017582

1) All the pressure specifications apply for cyclic temperature load

2) For insert or protection tube diameter Ød = 6 mm (0.236 in).

6.3 mm

(0.25 in)

6.2 mm

(0.24 in)

9.2 mm

(0.36 in)

2)

25 mm

(0.98 in)

30 mm

(1.18 in)

33 mm

(1.3 in)

57 mm

(2.24 in)

Technical properties

• P

= 10 bar (145 psi),

max.

T

= +150 °C (+302 °F) for

max.

PEEK material, tightening
torque = 10 Nm

• P

= 50 bar (725 psi),

max.

T

= +200 °C (+392 °F) for

max.

316L material, tightening
torque = 25 Nm

• PEEK compression fitting is
EHEDG tested and 3-A
marked

• P

= 10 bar (145 psi)

max.

• T

for Elastosil® ferrule =

max.

+150 °C (+302 °F),
tightening torque = 5 Nm

• Elastosil® compression
fitting is EHEDG tested

1)

Tip shape

The thermal response time, the reduction of the flow cross-section and the mechanical
load that occurs in the process are the criteria that matter when selecting the shape of the
tip. Advantages of using reduced or tapered thermometer tips:

• A smaller tip shape has less impact on the flow characteristics of the pipe carrying the
medium.

• The flow characteristics are optimized, thereby increasing the stability of the
thermowell.

• Endress+Hauser offers users a range of thermowell tips to meet every requirement:
– Reduced tip with 4.3 mm (0.17 in) and 5.3 mm (0.21 in): walls of lower thickness

significantly reduce the response times of the overall measuring point.

– Tapered tip with 6.6 mm (0.26 in) and reduced tip with 8 mm (0.31 in): walls of

greater thickness are particularly well suited to applications with a higher degree of
mechanical load or wear (e.g. pitting, abrasion etc.).

Endress+Hauser 71

 11 Thermowell tips available (reduced, straight or tapered)

A0017174

Technical Data iTHERM TrustSens TM371, TM372

Item No. Thermowell (D1) Insert (ID)

1 6 mm (¹⁄₄ in) Reduced tip 3 mm (¹⁄₈ in)

• Reduced tip with 5.3 mm (0.21 in)

2 9 mm (0.35 in)

3 12.7 mm (¹⁄₂ in)

1) The thermowell is made from barstock for L ≤ 200 mm (7.87 in). The tip is welded on for L > 200 mm
(7.87 in).

2) For L ≤ 200 mm (7.87 in) = internal diameter 8 mm (0.31 in). For L > 200 mm (7.87 in) = internal
diameter 6.6 mm (0.26 in)

• Straight tip

• Tapered tip with 6.6 mm (0.26 in)

• Reduced tip with 5.3 mm (0.21 in)

1)

• Straight tip

• Reduced tip with 8 mm (0.31 in)

2)

• 3 mm (¹⁄₈ in)

• 6 mm (¹⁄₄ in)

• 3 mm (¹⁄₈ in)

• 3 mm (¹⁄₈ in)

• 6 mm (¹⁄₄ in)

• 6 mm (¹⁄₄ in)

It is possible to check the mechanical loading capacity as a function of the installation
and process conditions online in the TW Sizing Module for thermowells in the
Endress+Hauser Applicator software. See 'Accessories' section.

13.7 Certificates and approvals

CE mark The product meets the requirements of the harmonized European standards. As such, it

complies with the legal specifications of the EC directives. The manufacturer confirms
successful testing of the product by affixing to it the CE-mark.

EAC mark The product meets the legal requirements of the EEU guidelines. The manufacturer

confirms the successful testing of the product by affixing the EAC mark.

cCSAus The product complies with "CLASS 2252 05 - Process Control Equipment" and "CLASS 2252

85 - Process Control Equipment - Certified to US Standards" requirements.

MTBF For the transmitter: 180 years - according to Siemens Standard SN29500

Hygiene standard • EHEDG certification, type EL - CLASS I. Permitted process connections in accordance

with EHEDG, see 'Process connections' section →  64

• 3-A authorization no. 1144, 3-A sanitary standard 74-06. Permitted process

connections in accordance with 3-A, see also 'Process connections' section

• ASME BPE, certificate of conformity can be ordered for indicated options

• FDA-compliant

• All product contact surfaces are produced without materials used derived from bovine or

other animal sources (TSE Certificate of Suitability)

Other standards and guidelines

• IEC 60529: Degrees of protection provided by enclosures (IP code)

• IEC 61010-1: Safety requirements for electrical equipment for measurement, control

and laboratory use

• IEC 60751: Industrial platinum resistance thermometers

• DIN 43772: Protection tubes

72 Endress+Hauser

iTHERM TrustSens TM371, TM372 Technical Data

Parts in contact with the medium

CRN approval The CRN approval is only available for certain options of protection tubes. These will be

Surface purity Cleaned from oil and grease for O2 applications, optional

Material resistance Material resistance - including housing - to the following cleaning agents/disinfectants

Parts of the thermometer in contact with the medium comply with the following European
regulations:

• (EC) No. 1935/2004, Article 3, paragraph 1, Articles 5 and 17 on materials and articles
intended to come into contact with food.

• (EC) No. 2023/2006 on good manufacturing practice for materials and articles intended
to come into contact with food.

• (EU) No. 10/2011 on plastic materials and articles intended to come into contact with
food.

marked and shown during the configuration of this device.

Detailed ordering information is available from the following sources:

• In the download area on the Endress+Hauser website: www.endress.com → Select your
country → Downloads → Enter product code or device → Media type: Approvals &
certificates → Select type of approval → Start search

• From your nearest Endress+Hauser sales organization: www.addresses.endress.com

from the company Ecolab: P3-topax 66, P3-topactive 200, P3-topactive 500 and P3­topactive OKTO as well as demineralized water.

Material certification The material certificate 3.1 (according to standard EN 10204) can be requested separately.

The "short form" certificate includes a simplified declaration with no enclosures of
documents related to the materials used in the construction of the single sensor and
guarantees the traceability of the materials through the identification number of the
thermometer. The data related to the origin of the materials can subsequently be
requested by the client if necessary.

Calibration The "Factory calibration" is carried out according to an internal procedure in a laboratory

of Endress+Hauser accredited by the European Accreditation Organization (EA) to ISO/IEC

17025. A calibration which is performed according to EA guidelines (SIT/Accredia) or

(DKD/DAkkS) may be requested separately.

The analog current output of the device is calibrated.

Protection tube testing and load capacity calculation

• Protection tube pressure tests are carried out in accordance with the specifications in
DIN 43772. With regard to protection tubes with tapered or reduced tips that do not
comply with this standard, these are tested using the pressure of corresponding straight
protection tubes. Tests according to other specifications can be carried out on request.

• Load capacity calculation for the protection tube as per DIN43772

Endress+Hauser 73

Operating menu and parameter description iTHERM TrustSens TM371, TM372

14 Operating menu and parameter description

The following tables list all the parameters in the "Setup", "Calibration", "Diagnostics"
and "Expert" operating menus. The page reference indicates where a description of the
parameter can be found in the manual.

Depending on the parameter configuration, not all submenus and parameters are
available in every device. Information on this can be found in the parameter
description under "Prerequisite".

This symbol indicates how to navigate to the parameter using operating tools (e.g.
FieldCare).

Setup → Device tag →  78

Unit →  78

4 mA value →  78

20 mA value →  79

Failure mode →  79

Calibration → Number of self-calibrations →  79

Stored self calibration points →  79

Deviation →  80

Adjustment →  80

Calibration → Limits → Lower warning value →  80

Upper warning value →  80

Lower alarm value →  81

Upper alarm value →  81

Calibration → Interval monitoring

1) Same parameter settings both for self calibration monitoring and manual calibration reminder

Calibration → Calibration report

Online wizard



Diagnostics → Actual diagnostics →  83

Previous diagnostics 1 →  83

Operating time →  84

1)

→ Control →  82

Start value →  82

Countdown value →  82

→  83

Diagnostics → Diagnostic list→ Actual diagnostics count →  84

Actual diagnostics →  84

Actual diag (n) channel

1) n = 2, 3; diagnostics messages with the highest priority to the third-highest priority

1)

→  84

74 Endress+Hauser

iTHERM TrustSens TM371, TM372 Operating menu and parameter description

Diagnostics → Event logbook → Previous diagnostics n

Previous diag (n) channel →  85

1) n = Number of diagnostics messages (n = 1 to 5)

Diagnostics → Device information → Device tag →  78

Tagging (TAG) →  86

Serial number →  86

Firmware version →  86

Device name →  86

Order code →  86

Extended order code (2, 3) →  87

Manufacturer ID →  87

Manufacturer →  87

Hardware revision →  87

Configuration counter →  88

Diagnostics → Measured values → Sensor value →  88

Sensor raw value →  88

Device temperature →  88

1)

→  85

Diagnostics → Measured values → Min/max values → Sensor min value →  89

Sensor max value →  89

Reset sensor min/max values →  89

Device temperature min. →  89

Device temperature max. →  89

Reset device temp. min/max values →  90

Diagnostics → Simulation → Diagnostic simulation →  90

Current output simulation →  90

Value current output →  90

Sensor simulation →  91

Sensor simulation value →  91

Diagnostics → Diagnostic settings → Diagnostic behavior →  91

Diagnostics → Diagnostic settings → Status signal →  92

Diagnostics → Heartbeat → Heartbeat verification

Online wizard



→  92

Endress+Hauser 75

Operating menu and parameter description iTHERM TrustSens TM371, TM372

Expert → Enter access code →  92

Access status tooling →  93

Locking status →  93

Expert → System → Unit →  78

Damping →  94

Expert → System → Administration → Define device write protection code →  94

Device reset →  95

Expert → Output → 4 mA value →  78

20 mA value →  79

Failure mode →  95

Failure current →  96

Current trimming 4 mA →  96

Current trimming 20 mA →  97

Expert → Output → Loop check configuration → Loop check configuration →  97

Simulation value 1 →  98

Simulation value 2 →  98

Simulation value 3 →  98

Loop check interval →  97

Expert → Communication → HART configuration → Device tag →  78

HART short tag →  99

HART address →  99

No. of preambles →  100

Configuration changed →  100

Expert → Communication → HART info→ Device type →  100

Device revision →  101

Device ID →  101

Manufacturer ID →  101

HART revision →  101

HART descriptor →  101

HART message →  102

Hardware revision →  102

Software revision →  102

HART date code →  102

Process unit tag →  102

Location description →  103

Longitude →  103

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Latitude →  103

Altitude →  103

Location method →  104

Expert → Communication → HART output→ Assign current output (PV) →  104

PV →  104

Assign SV →  104

SV →  105

Assign TV →  105

TV →  105

Assign QV →  105

QV →  105

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

14.1 Setup menu

This menu contains all the parameters that are needed to configure the basic settings of
the device. The thermometer can be put into operation with this limited parameter set.

Device tag

Navigation Setup → Device tag

Diagnostics → Device information → Device tag
Expert → Communication → HART configuration → Device tag

Description Use this function to enter a unique name for the measuring point so it can be identified

quickly within the plant.

User entry Max. 32 characters, such as letters, numbers or special characters (e.g. @, %, /)

Factory setting Depends on the product root and the serial number

Unit

Navigation Setup → Unit

Expert → System → Unit

Description Use this function to select the engineering unit for all the measured values.

Options • °C

• °F

• K

• °R

Factory setting °C

Additional information Please note that if the factory setting (°C) is switched to another unit, all the

temperature value settings will be converted to fit to the setted temperature unit.
Example: Upper range value is set to 150 °C. After the unit was switched to °F, the
new converted upper range value = 302 °F.

4 mA value

Navigation Setup → Lower range value

Expert → Output → 4 mA value

Description Use this function to assign a measured value to the current value 4 mA.

Factory setting 0 °C

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iTHERM TrustSens TM371, TM372 Operating menu and parameter description

20 mA value

Navigation Setup → Upper range value

Expert → Output → 20 mA value

Description Use this function to assign a measured value to the current value 20 mA.

Factory setting 150 °C

Failure mode

Navigation Setup → Failure mode

Expert → Output → Failure mode

Description Use this function to select the signal on alarm level of the current output in an event of an

error.

Options • High alarm

• Low alarm

Factory setting Low alarm

14.2 Calibration menu

All the information that describes the self-calibration procedure as well as the online
wizard creating a calibration report.

Number of self-calibrations

Navigation Calibration → Number of self-calibrations

Description This counter displays the amount of all executed self-calibrations. It cannot be reset.

Stored self-calibration points

Navigation Calibration → Stored self-calibration points

Description Displays the amount of all stored self-calibration points. This device is able to store 350

self-calibration points. As soon as the memory would reach its limit, the oldest self­calibration point will be overwritten.

Display 0 to 350

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

Deviation

Navigation Calibration → Deviation

Description This function displays the measured Pt100 self-calibration deviation from the reference

temperature. The deviation is calculated as follows: Self-calibration deviation = reference
temperature - measured Pt100 temperature value + adjustment

Display _.__ °C

Factory setting 0

Adjustment

Navigation Calibration → Adjustment

Description Use this function to adjust the measured Pt100 value. This value will be added to the

measured Pt100 value and therefore influences also the self-calibration deviation.
Self-calibration deviation = reference temperature - measured Pt100 temperature value +
adjustment

User entry –1.0 · 1020 to +1.0 · 10

20

Factory setting 0.000

14.2.1 "Limits" submenu

Lower warning value

Navigation Calibration → Limits → Lower warning value

Description Enter the lower warning limit for the self-calibration deviation.

User entry –1.0 · 1020 to –0.5 °C

Factory setting –0.5 °C

Additional information Use this function to define the lower warning limit. If the self-calibration deviation exceeds

the defined limit, the device will transmit the defined status signal and shows the defined
diagnostic behavior via the LED (diagnostic event 144).
(Factory setting = Warning - LED red flashes).

Upper warning value

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iTHERM TrustSens TM371, TM372 Operating menu and parameter description

Navigation Calibration → Limits → Upper warning value

Description Enter the upper warning limit for the self calibration deviation.

User entry +0.5 to +1.0 · 1020 °C

Factory setting +0.5 °C

Additional information Use this function to define the upper warning limit. If the self-calibration deviation

exceeds the defined limit, the device will transmit the defined status signal and shows the
defined diagnostic behavior via the LED.
(Factory setting = Warning - LED red flashes).

Lower alarm value

Navigation Calibration → Limits → Lower alarm value

Description Enter the lower alarm limit for the self-calibration deviation.

User entry –1.0 · 1020 to –0.8 °C

Factory setting –0.8 °C

Additional information Use this function to define the lower alarm limit. If the self-calibration deviation exceeds

the defined limit, the device will transmit the defined status signal and show the defined
diagnostic behavior via the LED (diagnostic event 143).
(Factory setting = Warning - LED red flashes).

Upper alarm value

Navigation Calibration → Limits → Upper alarm value

Description Enter the upper alarm limit for the self-calibration deviation.

User entry +0.8 to +1.0 · 1020 °C

Factory setting +0.8 °C

Additional information Use this function to define the upper alarm limit. If the self-calibration deviation exceeds

the defined limit, the device will transmit the defined status signal and shows the defined
diagnostic behavior via the LED.
(Factory setting = Warning - LED red flashes).

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

14.2.2 "Interval monitoring" submenu

The parameter configuration in this submenu is allocated into two calibration items:
Self-calibration monitoring: Monitoring function for the start of the next self­calibration.
Manual calibration reminder: This function signalizes when the next manual
calibration has to be performed.

Control

Navigation Calibration → Interval monitoring → Self-calibration monitoring / Manual

calibration reminder → Control

Description Self-calibration monitoring: Use this function to activate the self-calibration countdown.

This counter will count down from its start value until the next self-calibration is executed.
A successful self-calibration will set the counter to its start value. If the calibration counter
value reaches zero, the device will transmit the defined status signal and shows the
defined diagnostic behavior via the LED (Factory default = Alarm - red).
Manual calibration reminder: Use this function to set the start value for the calibration
counter.

Options • Off: Stops the calibration counter

• On: Starts the calibration counter

• Reset + run: Resets the calibration counter to the set start value and starts the
calibration counter

Factory setting Off

Start value

Navigation Calibration → Interval monitoring → Self-calibration monitoring / Manual

calibration reminder → Start value

Description Self-calibration monitoring: Enter the maximum days until a self-calibration must be

initiated. This function can be used to monitor the self-calibration interval (e.g. 1 year self­calibration interval corresponds to a start value of 365 days).
Manual calibration reminder: Use this function to set the start value for the calibration
counter.

User entry 0 to 1826 d (days)

Factory setting 1826 d

Countdown value

Navigation Calibration → Interval monitoring → Self-calibration monitoring / Manual

calibration reminder → Countdown value

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iTHERM TrustSens TM371, TM372 Operating menu and parameter description

Description Self-calibration monitoring: Displays the remaining time in days until a self-calibration

must be initiated. A successful self-calibration will set the counter to its start value. If the
countdown value reaches zero, the device will transmit the defined status signal and show
the defined diagnostic behavior via the LED, Factory default = Alarm - LED red illuminated

Manual calibration reminder: Indication of the remaining time up to the next calibration.

Display Remaining time in days, from max. 1826 d to 0 d.

Additional information Use this function to view the time remaining until the next calibration. The countdown of

the calibration counter is only running if the device is switched on.
Example: The calibration counter is set to 365 days on January 1st, 2011. If the device will
be switched off for 100 days, the calibration counter alarm is displayed on April 10th,

2012.

Online wizard 'Calibration report'

Calibration report

Navigation Calibration → Calibration report

Description Online wizard for creating a calibration report.

Additional information For a detailed procedure description see →  26

14.3 Diagnostics menu

Actual diagnostics

Navigation Diagnostics → Actual diagnostics

Description Use this function to display the current diagnostic message. If two or more messages occur

simultaneously, the message with the highest priority is shown.

Additional information Example for display format:

F001-Device failure

Previous diagnostics 1

Navigation Diagnostics → Previous diagnostics 1

Description Use this function to display the last diagnostic message with the highest priority.

Additional information Example for display format:

F001-Device failure

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

Operating time

Navigation Diagnostics → Operating time

Description Use this function to display the length of time the device has been in operation up to now.

Display Hours (h)

14.3.1 "Diagnostic list" submenu

Up to 3 diagnostic messages currently pending are displayed in this submenu. If more than
3 messages are pending, the messages with the highest priority are shown on the display.
Overview of all the diagnostic messages and remedies →  37.

Actual diagnostics count

Navigation Diagnostics → Diagnostic list → Actual diagnostics count

Description Use this function to display the number of diagnostic messages currently pending in the

device.

Actual diagnostics

Navigation Diagnostics → Diagnostics list → Actual diagnostics

Description Use this function to display the current diagnostic messages with the highest priority to

the third-highest priority.

Additional information Example for display format:

F001-Device failure

Actual diag channel

Navigation Diagnostics → Diagnostic list → Actual diag channel

Description Indication of the sensor input which this diagnostic message refers.

Use this function to display the current diagnostic message. If two or more messages occur
simultaneously, the message with the highest priority is shown.

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Display • ----------

• Sensor

• Device temperature

• Reference sensor

• Current output

14.3.2 "Event logbook" submenu

Previous diagnostics n

n = Number of diagnostic messages (n = 1 to 5)

Navigation Diagnostics → Event logbook → Previous diagnostics n

Description Indication of the diagnostic messages appeared in the past.

Use this function to display the diagnostic messages that occurred in the past. The last 5
messages are listed in chronological order.

Additional information Example for display format:

S844-Process value out of specification

Previous diag channel

Navigation Diagnostics → Event logbook → Previous diag channel

Description Indication of the sensor input which this diagnostic message refers.

Use this function to display the possible sensor input to which the diagnostic message
refers.

Display • ----------

• Sensor

• Device temperature

• Reference sensor

• Current output

14.3.3 "Device information" submenu

Device tag →  78

Navigation Setup → Device tag

Diagnostics → Device information → Device tag
Expert → Communication → HART configuration → Device tag

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

Tagging (TAG), metal/RFID

Navigation Diagnostics → Device information → Tagging (TAG), metal/RFID

Description Use this function to enter a unique name for the measuring point so it can be identified

quickly within the plant.

User entry Max. 32 characters, such as letters, numbers or special characters (e.g. @, %, /)

Factory setting -none-

Serial number

Navigation Diagnostics → Device information → Serial number

Description Use this function to display the serial number of the device. It can also be found on the

nameplate.

Uses of the serial number

• To identify the measuring device quickly, e.g. when contacting Endress+Hauser.

• To obtain specific information on the measuring device using the Device Viewer:

www.endress.com/deviceviewer

Display Max. 11-digit character string comprising letters and numbers.

Firmware version

Navigation Diagnostics → Device information → Firmware version

Description Use this function to view the device firmware version installed.

Display Max. 6-digit character string in the format xx.yy.zz

Device name

Navigation Diagnostics → Device information → Device name

Description Displays the device name. It can also be found on the nameplate.

Order code

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iTHERM TrustSens TM371, TM372 Operating menu and parameter description

Navigation Diagnostics → Device information → Order code

Description Use this function to display the order code of the device. It can also be found on the

nameplate. The order code is generated from the extended order code, which defines all
the device features of the product structure. In contrast, the device features cannot be read
directly from the order code.

Uses of the order code

• To order an identical spare device.

• To identify the device quickly and easily, e.g. when contacting the manufacturer.

Extended order code n

n = Number of parts of the extended order code (n = 1 to 3)

Navigation Diagnostics → Device information → Extended order code n

Description Use this function to display the first, second and/or third part of the extended order code.

On account of length restrictions, the extended order code is split into a maximum of 3
parameters. The extended order code indicates the version of all the features of the
product structure for the device and thus uniquely identifies the device. It can also be
found on the nameplate.

• Uses of the extended order code

• To order an identical spare device

• To check the ordered device features against the shipping note

Manufacturer ID

Navigation Diagnostics → Device information → Manufacturer ID

Expert → Communication → HART info → Manufacturer ID

Description Use this function to view the manufacturer ID with which the device is registered with the

HART FieldComm Group.

Display 2-digit hexadecimal number

Factory setting 0x11

Manufacturer

Navigation Diagnostics → Device information → Manufacturer

Description Indication of the manufacturer name.

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

Hardware revision

Navigation Diagnostics → Device information → Hardware revision

Description Indication of the hardware revision of the device.

Configuration counter

Navigation Diagnostics → Device information → Configuration counter

Description Use this function to display the counter reading for changes to device parameters.

Static parameters, whose values change during optimization or configuration, cause
this parameter to increment by 1. This supports parameter version management. If
several parameters change, e. g. due to loading of parameters from FieldCare, etc. in
the device, the counter can show a higher value. The counter cannot be reset and is
also not reset to the default value when the device is reset. If the counter overflows,
(16 bit), it starts again at 1.

14.3.4 "Measured values" submenu

Sensor value

Navigation Diagnostics → Measured values → Sensor value

Description Use this function to display the current measured value at the sensor input.

Sensor raw value

Navigation Diagnostics → Measured values → Sensor raw value

Description Use this function to display the non-linearized mV/Ohm value at the specific sensor input.

Device temperature

Navigation Diagnostics → Measured values → Device temperature

Description Use this function to display the current electronics temperature.

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iTHERM TrustSens TM371, TM372 Operating menu and parameter description

"Min/max values" submenu

Sensor min value

Navigation Diagnostics → Measured values → Min/max values → Sensor min value

Description Use this function to display the minimum temperature measured in the past at sensor

input (peakhold indicator).

Sensor max value

Navigation Diagnostics → Measured values → Min/max values → Sensor max value

Description Use this function to display the maximum temperature measured in the past at sensor

input (peakhold indicator).

Reset sensor min/max values

Navigation Diagnostics → Measured values → Min/max values → Reset sensor min/max values

Description Use this function to reset min/max values of the sensor to its default values.

User entry By clicking the button Reset sensor min/max values the reset function is activated. As a

result, the sensor min./max. values are just indicating the reset, temporary values.

Device temperature min.

Navigation Diagnostics → Measured values → Min/max values → Device temperature min.

Description Use this function to display the minimum electronics temperature measured in the past

(maximum indicator).

Device temperature max.

Navigation Diagnostics → Measured values → Min/max values → Device temperature max.

Description Use this function to display the maximum electronics temperature measured in the past

(peakhold indicator).

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

Reset device temp. min/max values

Navigation Diagnostics → Measured values → Min/max values → Reset device temp. min/max

values

Description Use this function to reset the maximum indicators for the minimum and maximum

electronic temperatures measured.

User entry By clicking the button Reset device temp. min/max values the reset function is activated.

As a result, the device temperature min/max values are just indicating the reset,
temporary values.

14.3.5 "Simulation" submenu

Diagnostic simulation

Navigation Diagnostics → Simulation → Diagnostic simulation

Description Use this function to switch diagnostic simulation on and off.

Options Use the dropdown menu to enter one of the diagnostic events →  37. In the simulation

mode the assigned status signals and diagnostic behaviors are applied.
Example: x001-Device failure

Factory setting Off

Current output simulation

Navigation Diagnostics → Simulation → Current output simulation

Description Use this function to switch simulation of the current output on and off. The status signal

indicates a diagnostic message of the "function check" category (C) while simulation is in
progress.

Options • Off

• On

Factory setting Off

Value current output

Navigation Diagnostics → Simulation → Value current output

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iTHERM TrustSens TM371, TM372 Operating menu and parameter description

Description Use this function to set a current value for the simulation. In this way, users can verify the

correct adjustment of the current output and the correct function of downstream switching
units.

User entry 3.58 to 23 mA

Factory setting 3.58 mA

Sensor simulation

Navigation Diagnostics → Simulation → Sensor simulation

Description Use this function to switch simulation of the sensor temperature on and off. The status

signal indicates a diagnostic message of the "function check" category (C) while simulation
is in progress.

Options • Off

• On

Factory setting Off

Sensor simulation value

Navigation Diagnostics → Simulation → Sensor simulation value

Description Use this function to set a sensor temperature for the simulation. In this way, users can

verify the correct adjustment of the sensor temperature limits and the correct function of
downstream switching units.

User entry –1.0 · 1020 to +1.0 · 1020 °C

Factory setting 0.00 °C

14.3.6 "Diagnostic settings" submenu

Diagnostic behavior

Navigation Diagnostics → Diagnostic settings → Diagnostic behavior

Description Each diagnostic event is assigned to a certain diagnostic behavior. The user can change

this assignment for certain diagnostic events. →  37

Options • Alarm

• Warning

• Disabled

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

Factory setting See overview of diagnostic events →  37

Status signal

Navigation Diagnostics → Diagnostic settings → Status signal

Description Each diagnostic event is assigned to a certain status signal

change this assignment for certain diagnostic events. →  37

1) Digital information available via HART® communication

Options • Failure (F)

• Function check (C)

• Out of specification (S)

• Maintenance required (M)

• No effect (N)

Factory setting See overview of diagnostic events →  37

14.3.7 "Heartbeat" submenu

Online wizard 'Heartbeat verification'

Heartbeat verification

Navigation Diagnostics → Heartbeat → Heartbeat verification

1)

from the factory. The user can

Description Online wizard for creating a Heartbeat verification report.

Additional information For a detailed procedure description →  31

14.4 Expert menu

Enter access code

Navigation Expert → Enter access code

Description Use this function to enable the service parameters via the operating tool. If an incorrect

access code is entered, the user retains his current access authorization.

If a value is entered that is not to equal to the access code, the parameter is
automatically set to 0. The service parameters should only be modified by the service
organization.

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Additional information Software device write protection is also switched on and off with this parameter.

Software device write protection in conjunction with download from an operating tool with
offline capabilities

• Download, the device does not have a defined write protection code:
The download is performed as normal.

• Download, defined write protection code, device is not locked.
– The Enter access code parameter (offline) contains the correct write protection code:

the download is carried out, and the device is not locked following the download. The
write protection code in the Enter access code parameter is set to 0.

– The Enter access code parameter (offline) does not contain the correct write

protection code: the download is carried out, and the device is locked following the
download. The write protection code in the Enter access code parameter is reset to 0.

• Download, defined write protection code, device is locked.
– The Enter access code parameter (offline) contains the correct write protection code:

the download is carried out, and the device is locked following the download. The write
protection code in the Enter access code parameter is reset to 0.

– The Enter access code parameter (offline) does not contain the correct write

protection code: the download is not carried out. No values are changed in the device.
The value of the Enter access code parameter (offline) is also not changed.

User entry 0 to 9 999

Factory setting 0

Access status tooling

Navigation Expert → Access status tooling

Description Use this function to show access authorization to the parameters.

Additional information If additional write protection is active, this restricts the current access authorization even

further. The write protection status can be viewed via the Locking status parameter.

Options • Operator

• Service

Factory setting Operator

Locking status

Navigation Expert → Locking status

Description Use this function to view the device locking status. When write protection is activated,

write access to the parameters is disabled.

Display Activated or de-activated box: Write protected by software

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

14.4.1 "System" submenu

Unit →  78

Navigation Setup → Unit

Expert → System → Unit

Damping

Navigation Expert → System → Damping

Description Use this function to set the time constant for current output damping.

User entry 0 to 120 s

Factory setting 0 s

Additional information The current output reacts with an exponential delay to fluctuations in the measured value.

The time constant of this delay is specified by this parameter. If a low time constant is
entered, the current output follows the measured value quickly. On the other hand, if a
high time constant is entered, the current output reaction is delayed.

"Administration" submenu

Define device write protection code

Navigation Expert → System → Administration → Define device write protection code

Description Sets a write protection code for the device.

If the code is programmed into the device firmware it is saved in the device and the
operating tool displays the value 0 so that the defined write protection code is not
openly displayed.

User entry 0 to 9 999

Factory setting 0

If the device is delivered with this factory setting the device write protection is not
active.

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Additional information • Activating device write protection: A value must be entered in the Enter access code

parameter, which is not corresponding to this defined device write protection code.

• Deactivating device write protection: if device write protection is activated, enter the
defined write protection code in the Enter access code parameter.

• Once the device has been reset to the factory setting or the order configuration, the
defined write protection code is no longer valid. The code adopts the factory setting (=

0).

If the device write protection code was forgotten, it can be deleted or overwritten by
the service organization.

Device reset

Navigation Expert → System → Administration → Device reset

Description Use this function to reset the device configuration - either entirely or in part - to a defined

state.

Options • Restart device

The device is restarted but the device configuration remains unchanged.

• To delivery settings
All the parameters are reset to the order configuration. The order configuration can
differ from the factory setting if customer-specific parameter values were defined when
the device was ordered.

• To factory defaults
All the parameters are reset to the factory setting.

14.4.2 "Output" submenu

4 mA value →  78

Navigation Setup → Lower range value

Expert → Output → 4 mA value

20 mA value →  79

Navigation Setup → 20 mA value

Expert → Output → 20 mA value

Failure mode →  79

Navigation Setup → Failure mode

Expert → Output → Failure mode

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

Failure current

Navigation Expert → Output → Failure current

Prerequisite The option High alarm is enabled in the failure mode.

Description Use this function to set the value the current output adopts in an alarm condition.

User entry 21.5 to 23 mA

Factory setting 22.5

Adjustment of the analog output (4 and 20 mA current trimming)

Current trimming is used to compensate the analog output (D/A conversion). Here, the
output current of the transmitter must be adapted so that it suits the value expected at the
higher-order system.

Current trimming does not affect the digital HART® value. This can cause the
measured value shown on a locally installed display to differ from the value displayed
in the higher-order system.

Procedure

1. Start

ß

2. Install an accurate amperemeter (more accurate then the transmitter) in the current loop.

ß

3. Switch on current output simulation and set the simulation value to 4 mA.

ß

4. Measure the loop current with the amperemeter and make a note of the value.

ß

5. Set the simulation value to 20 mA.

ß

6. Measure the loop current with the amperemeter and make a note of the value.

ß

7. Enter the current values determined as adjustment values in the Current trimming 4 mA / 20 mA
parameters

ß

8. End

Current trimming 4 mA

Navigation Expert → Output → Current trimming 4 mA

Description Use this function to set the correction value for the current output at the start of the

measuring range at 4 mA.

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User entry 3.5 to 4.25 mA

Factory setting 4 mA

Additional information The trimming only affects current loop values from 3.8 to 20.5 mA. Failure mode with

Low Alarm and High Alarm current values are not subjected to the trimming.

Current trimming 20 mA

Navigation Expert → Output → Current trimming 20 mA

Description Use this function to set the correction value for the current output at the end of the

measuring range at 20 mA.

User entry 19.50 to 20.5 mA

Factory setting 20.000 mA

Additional information The trimming only affects current loop values from 3.8 to 20.5 mA. Failure mode with

Low Alarm and High Alarm current values are not subjected to the trimming.

"Loop check configuration" submenu

Loop check configuration

Navigation Expert → Output → Loop check configuration → Loop check configuration

Description This function is active when there is at least one value defined. The loop check function

will run by each restart (power up) of the device. Measure the loop current with the
amperemeter. If the measured values deviates from the simulation values, these current
output values have to be adjusted.
To activate the loopcheck, define and activate at least one of the following values.

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Operating menu and parameter description iTHERM TrustSens TM371, TM372

I [mA]

t [s]

Simu 1

Simu 2

Simu 3

Low

High

Additional information After the device has been started up the loop check starts and the activated simulation

values will be checked. These loop current values can be measured with a accurate
amperemeter. If the measured values deviates from the set simulation values, it is
recommended to adjust these current output values. For current trimming 4 mA/20 mA
see description above.

A0033636

 12 Loop check curve

If there is one of the following diagnostic events active at the start up process, the
device cannot perform a loop check: 001, 401, 411, 437, 501, 531 (channel "-------"
or "Current output"), 537 (channel "-------" or "Current output"), 801, 825. If the device
is operating in the multidrop mode, the loop check cannot be performed.

Options Activation of the check values:

• Simulation value 1

• Simulation value 2

• Simulation value 3

• Low alarm

• High alarm

Simulation value n

n = number of simulation values (1 to 3)

Navigation Expert → Output → Loop check configuration → Simulation value n

Description Use this function to adjust the first, second or third value which will be simulated after

each restart to check the current loop.

Options Enter the current values to check the loop

• Simulation value 1
User entry: 3.58 to 23 mA

• Simulation value 2
User entry: 3.58 to 23 mA

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• Simulation value 3
User entry: 3.58 to 23 mA

iTHERM TrustSens TM371, TM372 Operating menu and parameter description

Factory setting • Simulation value 1: 4.00 mA, not activated

• Simulation value 2: 12.00 mA, not activated

• Simulation value 3: 20.00 mA, not activated

• Low alarm and High alarm not activated

Loop check interval

Navigation Expert → Output → Loop check configuration → Loop check interval

Description Displays the duration each single value is simulated.

User entry 4 to 255 s

Factory setting 4 s

14.4.3 "Communication" submenu

"HART configuration" submenu

Device tag →  78

Navigation Setup → Device tag

Expert → Communication → HART configuration → Device tag

HART short tag

Navigation Expert → Communication → HART configuration → HART short tag

Description Use this function to define a short tag for the measuring point.

User entry Up to 8 alphanumeric characters (letters, numbers and special characters).

Factory setting 8 x '?'

HART address

Navigation Expert → Communication → HART configuration → HART address

Description Use this function to define the HART address of the device.

User entry 0 ... 63

Endress+Hauser 99

Operating menu and parameter description iTHERM TrustSens TM371, TM372

Factory setting 0

Additional information The measured value can only be transmitted via the current value is the address is set to

"0". The current is fixed at 4.0 mA for all other addresses (Multidrop mode).

No. of preambles

Navigation Expert → Communication → HART configuration → No. of preambles

Description Use this function to define the number of preambles in the HART telegram.

User entry 5 to 20

Factory setting 5

Configuration changed

Navigation Expert → Communication → HART configuration → Configuration changed

Description Indicates whether the configuration of the device has been changed by a master (primary

or secondary).

"HART info" submenu

Device type

Navigation Expert → Communication → HART info → Device type

Description Use this function to view the device type with which the device is registered with the HART

FieldComm Group. The device type is specified by the manufacturer. It is needed to assign
the appropriate device description file (DD) to the device.

Display 4-digit hexadecimal number

Factory setting 0x11CF

Device revision

Navigation Expert → Communication → HART info → Device revision

100 Endress+Hauser