Endress+Hauser OTR31 User manual

Operating Instructions

Temperature switch OTR31,

OTR35

For safe measurement, monitoring and control of

process temperatures

80 50

BA00229O/09/EN/15.20

71509927

2020-11-30

Valid as of version

01.02 (device version)

Temperature switch OTR31, OTR35 Table of contents

Table of contents

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

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

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

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

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

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

2.3 Workplace safety .................... 6

2.4 Operational safety ................... 6

2.5 Product safety ....................... 7

2.6 IT security .......................... 7

3 Incoming acceptance and

product identification .......... 7

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

3.2 Product identification ................. 8

3.3 Nameplate .......................... 8

3.4 Name and address of manufacturer ..... 8

3.5 Certificates and approvals ............. 9

3.6 Hygiene standard .................... 9

3.7 Storage and transport ................. 9

4 Mounting ........................ 9

4.1 Mounting requirements ............... 9

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

5 Electrical connection .......... 12

5.1 Connecting requirements ............ 12

6 Operating options ............. 15

6.1 Local operation ..................... 15

6.2 Access to the operating menu via the

operating tool ...................... 24

7 Diagnostics and

troubleshooting ............... 25

7.1 General troubleshooting ............. 25

7.2 Firmware history ................... 26

8 Maintenance .................. 26

8.1 Cleaning ........................... 27

9 Repair .......................... 27

9.1 Disposal ........................... 27

10 Accessories .................... 28

10.1 Device-specific accessories ............ 28

10.2 Communication-specific accessories ... 30

11 Technical data ................. 31

11.1 Input .............................. 31

11.2 Output ............................ 32

11.3 Power supply ....................... 33

11.4 Output ............................ 33

11.5 Environment ....................... 33

11.6 Process ............................ 34

11.7 Mechanical construction ............. 37

11.8 Certificates and approvals ............ 40

About this document Temperature switch OTR31, OTR35

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 used

1.2.1 Safety symbols

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.

NOTICE

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.

Temperature switch OTR31, OTR35 About this document

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.

Forbidden

Procedures, processes or actions that are forbidden.

Tip

Indicates additional information.

Reference to documentation

Reference to page

Reference to graphic

Notice or individual step to be observed

… Series of steps

Result of a step

Help in the event of a problem

Visual inspection

1.2.4 Symbols in graphics

Symbol Meaning Symbol Meaning

1, 2, 3,... Item numbers

… Series of steps

A, B, C, ... Views A-A, B-B, C-C, ... Sections

Hazardous area

Safe area (non-hazardous area)

Basic safety instructions Temperature switch OTR31, OTR35

2 Basic safety instructions

2.1 Requirements for the 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 temperature switch for monitoring, displaying and controlling process

temperatures. The device is designed to meet state-of-the-art safety requirements and

complies with applicable standards and EC regulations. The device can, however, be a source

of danger if used incorrectly or for anything other than the purpose for which it was intended.

The manufacturer is not liable for damage caused by using the device incorrectly or for

purposes for which it was not intended.

2.3 Workplace safety

For work on and with the device:

‣Wear the required personal protective equipment according to federal/national

regulations.

If working on and with the device with wet hands:

‣Due to the increased risk of electric shock, gloves must be worn.

2.4 Operational safety

The measuring system meets the general safety requirements according to EN 61010-1 and

the EMC requirements according to IEC/EN 61326 in addition to NAMUR recommendations

NE 21, NE 43 and NE 53.

• Functional safety:

The device has been developed according to the IEC 61508 and IEC 61511-1 (FDIS)

standards. The device version with a PNP switch output and additional analog output is

fitted with mechanisms for error detection and prevention within the electronics and

software.

• Hazardous area:

The device is not approved for use in hazardous areas.

Temperature switch OTR31, OTR35 Incoming acceptance and product identification

Risk of injury!

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

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

Modifications to the device

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

dangers:

‣If modifications are nevertheless required, consult with the manufacturer.

Repair

To ensure continued operational safety and reliability:

‣Carry out repairs on the device only if they are expressly permitted.

‣Observe federal/national regulations pertaining to the repair of an electrical device.

‣Use only original spare parts and accessories from the manufacturer.

2.5 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. The manufacturer

confirms this by affixing the CE mark to the device.

2.6 IT security

Our warranty is valid only if the device is installed and used as described in the Operating

Instructions. The device is equipped with security mechanisms to protect it against any

inadvertent changes to the settings.

IT security measures, which provide additional protection for the device and associated data

transfer, must be implemented by the operators themselves in line with their security

standards.

3 Incoming acceptance and product identification

3.1 Incoming acceptance

Proceed as follows on receipt of the device:

1. Check whether the packaging is intact.

2. If damage is discovered:

Report all damage immediately to the manufacturer.

3. Do not install damaged material, as the manufacturer cannot otherwise guarantee

compliance with the safety requirements and cannot be held responsible for the

consequences that may result.

Incoming acceptance and product identification Temperature switch OTR31, OTR35

4. Compare the scope of delivery to the contents of the order.

5. Remove all the packaging material used for transportation.

3.2 Product identification

The device can be identified in the following ways:

Nameplate specifications

3.3 Nameplate

The nameplate illustrated below is designed to help users identify specific product

information, such as the serial number, design, variables, configuration and device approvals:

Thermophant T

Order Code: TTR3x-xxxxxxxx

Ser.No.: xxxxxxxxxxxxxx

TAG No.: Xxxxxxxxxxxxxxxxxx

Xxxxxxxxxxxxxxxxxx

Rel.: XX.YY.ZZ

Pt100 (-50 … 150°C)

-40°C < Ta < 85°C

IP6X

Output < 250 mA

Current consump. 60mA

12 - 30V DC

PNP / 4...20mA

L+

L-

1 2

8910

A0008138

 1 Nameplate for device identification

1 Manufacturer's details

2 Order code

3 Serial number

4 Tag number

5 Release number

6 Connection data

7 Connection diagram

8 Measuring range

9 Ambient temperature

10 Degree of protection

11 Approvals

Compare and check the data on the nameplate of the device against the requirements of

the measurement point.

3.4 Name and address of manufacturer

Name of manufacturer: Endress+Hauser Wetzer GmbH + Co. KG

Address of manufacturer: Obere Wank 1, D-87484 Nesselwang or www.endress.com

Temperature switch OTR31, OTR35 Mounting

3.5 Certificates and approvals

3.5.1 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.

3.6 Hygiene standard

• EHEDG certification, TYPE EL CLASS I. Permitted process connections in accordance with

EHEDG, see 'Process connections' section →  37

• 3-A Authorization No. 1144. 3-A Sanitary Standard. Permitted process connections in

accordance with 3-A, see also "Process connections" section→  37

• FDA-compliant

3.7 Storage and transport

Pack the device so that it is reliably protected against impact when it is stored (and

transported). The original packaging offers the best protection.

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

4 Mounting

4.1 Mounting requirements

Do not turn the device into the process connection thread at the housing. Always install

the device at the hexagonal screw of the sensor module (→  2,  10, item 1). using a

suitable open-ended wrench (see table →  38).

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.

Mounting Temperature switch OTR31, OTR35

4.2 Mounting the device

120 °C

≥ 3°

Dtdt

120 °C

A0011644

 2 Installation options for temperature monitoring in pipelines

1 Hexagonal screw of sensor module

2 Temperature switch

3 Temperature switch for use in hygienic processes

4.2.1 General installation instructions

• Installation at elbows, against the direction of flow (A).

• Installation in smaller pipes, inclined against the direction of flow (B).

• Installation perpendicular to the direction of flow (C).

Installation of hygiene version at a min. angle of 3° to guarantee self-draining.

• The local display can be rotated electronically by 180°: "Local operation", →  15.

• The housing can be rotated up to 310°.

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