Endress+Hauser Flowphant T ODTT31 User manual

Operating Instructions
Flow switch ODTT31, ODTT35
For safe monitoring of mass flow rates and
temperature in industrial processes
80 50
%%
BA00235O/09/EN/17.20
71509928
2020-12-15
Valid as of version
01.00 (device version)

Flow switch ODTT31, ODTT35 Table of contents
3
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 Designated 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 Name and address of manufacturer ..... 8
3.4 Certificates and approvals ............. 9
3.5 Storage and transport ................. 9
4 Mounting ........................ 9
4.1 Mounting requirements ............... 9
5 Electrical connection .......... 15
5.1 Connecting requirements ............ 15
6 Operating options ............. 17
6.1 Overview of operating options ........ 17
6.2 Structure and function of the operating
menu ............................. 19
6.3 Access to the operating menu via the
operating tool ...................... 29
7 Diagnostics and
troubleshooting ............... 30
7.1 General troubleshooting ............. 30
7.2 Firmware history ................... 32
8 Maintenance .................. 32
8.1 Cleaning ........................... 33
9 Repair .......................... 33
9.1 Disposal ........................... 33
10 Accessories .................... 34
10.1 Device-specific accessories ............ 34
10.2 Communication-specific accessories ... 36
11 Technical data ................. 37
11.1 Input .............................. 37
11.2 Output ............................ 38
11.3 Power supply ....................... 38
11.4 Environment ....................... 39
11.5 Process ............................ 40
11.6 Mechanical construction ............. 41
11.7 Certificates and approvals ............ 44

About this document Flow switch ODTT31, ODTT35
4
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.

Flow switch ODTT31, ODTT35 About this document
5
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
A
Reference to page
Reference to graphic
Notice or individual step to be observed
1.
,
2.
,
3.
… Series of steps
Result of a step
Help in the event of a problem
Visual inspection
1.2.4 Symbols in graphics
Symbol Meaning
1, 2, 3, ... Item numbers
1.
,
2.
,
3.
, … Series of steps
A, B, C, ... Views
A-A, B-B, C-C, ... Sections
-
Hazardous area
.
Safe area (non-hazardous area)
Flow direction

Basic safety instructions Flow switch ODTT31, ODTT35
6
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 Designated use
The device is a flow switch for monitoring mass flow rates in industrial processes. 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 designated use.
The manufacturer is not liable for damage caused by improper or non-designated use.
2.3 Workplace safety
For work on and with the device:
‣Wear the required personal protective equipment according to federal/national
regulations.
For welding work on the piping:
‣Do not ground the welding unit via the measuring device.
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
• 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.

Flow switch ODTT31, ODTT35 Incoming acceptance and product identification
7
Risk of injury!
‣Operate the device in proper technical condition and fail-safe condition only.
‣The operator is responsible for the 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 EU
directives listed in the device-specific EU Declaration of Conformity.
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 Flow switch ODTT31, ODTT35
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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
3.2.1 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
1
4
3
2
L+
L-
1 2
1
23
4
5
6
7
8910
11
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 measuring point.
3.3 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

Flow switch ODTT31, ODTT35 Mounting
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3.4 Certificates and approvals
3.4.1 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.
3.4.2 Hygiene standard
• EHEDG certification, type EL CLASS I. EHEDG-certified/tested process connections
→  42
• 3-A Authorization No. 1144, 3-A Sanitary Standard 74-07. Listed process connections
→  43
3.5 Storage and transport
Pack the device in such a way that it is reliably protected against impact during storage
(and transportation). The original packaging provides optimum protection.
Storage temperature –40 to +85 °C (–40 to +185 °F)
4 Mounting
4.1 Mounting requirements
4.1.1 Dimensions
→  41
4.1.2 Ambient temperature range
Ta–40 to +85 °C (–40 to +185 °F)
4.1.3 General installation instructions
NOTICE
Damage to the device.
‣To ensure correct monitoring, the sensor must be installed in a way that produces a fully
developed flow profile.
‣Stabilization sections (5x DN) must be provided in the pipe downstream from a pump, pipe
elbows, internal fixtures and cross-sectional changes.

Mounting Flow switch ODTT31, ODTT35
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NOTICE
Damage to the device.
‣Do not turn the device into the process connection thread at the housing→  10.
‣Always install the device at the wrench flats.
‣Use a suitable open-ended wrench →  10.
‣The local display can be rotated electronically by 180 °→  17.
‣The top housing section can be rotated mechanically by up to 310 °.

Flow switch ODTT31, ODTT35 Mounting
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• The sensor tip must be completely surrounded by the
medium
• Position the sensor tip in the area of maximum flow
velocity (pipe center)
• Minimum sensor immersion length
Li ≥ 10 mm (0.4 in).
80
%
Li
vm
1
A0006976
 2 Installation instructions (example)
Orientation
• For horizontal pipes: lateral installation. Installation
from above only if the pipe is completely filled with
medium
• For vertical pipes: installation in the ascending pipe
• For ODTT35: Install at an angle of at least 3 ° to
guarantee self-draining.
≥ 3°
U
Lt
Dt dt
120 °C
≥ 3
A0044425
 3 Correct orientation

Mounting Flow switch ODTT31, ODTT35
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NOTICE
If the device is installed incorrectly this can result in
incorrect measurements!
‣Do not install in down pipes open towards the end.
‣The sensor tip should never touch the pipe wall.
80
%
80
%
A0006978
 4 Incorrect installation!

Flow switch ODTT31, ODTT35 Mounting
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4.1.4 Installation instructions when installing in hygienic processes
1 2 3
R0.4 R0.4
1.1
1.2
1.3
1.4
1.5
2.1
2.2
2.3 3.1
3.2
A0044659
 5 Detailed installation instructions for hygiene-compliant installation
1 Milk pipe connection according to DIN 11851 (PL, PG, PH connection), only in conjunction with
EHEDG-certified and self-centering sealing ring
1.1 Sensor with milk pipe connection
1.2 Groove slip-on nut
1.3 Counterpart connection
1.4 Centering ring
1.5 Sealing ring
2 Varivent® and APV-Inline (LB, LL, HL connection)
2.1 Sensor with Varivent® connection
2.2 Counterpart connection
2.3 O-ring
3 Clamp according to ISO 2852 (DB, DL connection), EHEDG certified only in conjunction with seal
according to EHEDG position paper
3.1 Molded seal
3.2 Counterpart connection
The requirements of the EHEDG and the 3-A Sanitary Standard must be adhered to.
Installation instruction EHEDG/cleanability: Lt ≤ (Dt-dt)
Installation instruction 3-A/cleanability: Lt ≤ 2(Dt-dt)
In the case of weld-in connections, exercise the necessary degree of care when performing the
welding work on the process side:
1. Use suitable welding material.
2. Flush-weld or weld with welding radius ≥ 3.2 mm (0.13 in).

Mounting Flow switch ODTT31, ODTT35
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3. Avoid crevices, folds or gaps.
4. Ensure the surface is honed and polished, Ra ≤ 0.76 µm (30 µin).
Pay attention to the following when installing the thermometer to ensure that the cleanability
is not affected:
1. The installed sensor is suitable for CIP (cleaning in place). Cleaning is carried out in
combination with tubing/piping or tank/vessel. In the case of internal tank fixtures
using process connection nozzles, it is important to ensure that the cleaning assembly
sprays this area directly so that it is cleaned properly.
2. The Varivent® connections enable flush-mounted installation.
NOTICE
The following action must be taken if a sealing ring (O-ring) or seal fails:
‣The thermometer must be removed.
‣The thread and the O-ring joint/sealing surface must be cleaned.
‣The sealing ring or seal must be replaced.
‣CIP must be performed after installation.
4.1.5 Inlet and outlet runs
NOTICE
The thermal measuring principle is sensitive to disturbed flow conditions.
‣Install the measuring device as far away as possible from any flow disturbances. For further
information → ISO 14511.
‣Install the sensor upstream from fittings such as valves, T-pieces, elbows etc.
‣To attain the specified level of accuracy of the measuring device, the inlet and outlet runs
mentioned below must be maintained at the very minimum.
‣If several flow disturbances are present, maintain the longest specified inlet run.

Flow switch ODTT31, ODTT35 Electrical connection
15
5 × DN 3 × DN
3 × DN
15 × DN
5 × DN
3 × DN 3 × DN
3 × DN
5 × DN
3 × DN
10 × DN
5 × DN
1
4
2
6
3
5
A0023225
 6 Inlet and outlet runs
1 Reduction
2 Extension
3 90° elbow or T-piece
4 Pump
5 Control valve
6 2x 90° elbow, 2- or 3-dimensional
5 Electrical connection
5.1 Connecting requirements
5.1.1 DC voltage version with M12x1 connector
ODTT35: According to the 3-A Sanitary Standard electrical connecting cables must be smooth,
corrosion-resistant and easy to clean.

Electrical connection Flow switch ODTT31, ODTT35
16
4...20 mA
L–
L–
L–
L+
L+
L+
2
2
21
1
1
3
3
34
4
4
R1 Rx
R2
R1
A1 A2
A2’
A3
A0006818
 7 Flow switch with M12x1 connector
Item no. Output setting
A1 1x PNP switch output
A2 2x PNP switch output R1 and Rx (R2)
A2’ 2x PNP switch output R1 and Rx (diagnostics/NC contact with "DESINA"
setting)
A3 1x PNP switch output and 1x analog output (4 to 20 mA)
LWARNING
Observe the following to avoid damaging the analog input of a PLC:
‣Do not connect the active PNP switch output of the device to the 4 to 20 mA input of a PLC.
DESINA: distributed and standardized installation technology for machine tools and
manufacturing systems, →  25.
R2 = diagnostics/NC contact (for more information on DESINA, see www.desina.de)
NOTICE
The sensor tip of the device heats up once the device is connected to the power supply!
The temperature can increase to approx. 90 °C (194 °F).
‣As the device sensor tip heats up, appropriate protective clothing must be worn!

Flow switch ODTT31, ODTT35 Operating options
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5.1.2 DC voltage version with valve connector
1
3
L–
L+
2
R
B
A0035798
 8 Flow switch with M16x1.5 valve connector or NPT ½"
Item no. Output setting
B 1x PNP switch output
6 Operating options
6.1 Overview of operating options
The device is operated via three keys. The digital display and the light emitting diodes (LED)
assist navigation through the operating menu.

Operating options Flow switch ODTT31, ODTT35
18
1
E
4
5
2
3
A0044663
 9 Position of the operating elements and possibilities for display
1 Operating keys
2 Digital display: illuminated white (= ok); red (= alarm/error)
3 Yellow LED for switching states: LED on = switch closed; LED off = switch open
4 Communication jack for PC configuration
5 LED for status display: green = OK; red = error/fault; flashing red/green = warning
To prevent damage to the keys, do not operate them with a pointed object!

Flow switch ODTT31, ODTT35 Operating options
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6.2 Structure and function of the operating menu
6.2.1 Navigation in the operating menu
AB
E
E
EE
E
EE E E E
> 3 s
> 3 s
E
SAVE
BASE
1.
2.
3.
4.
5.
5.
6.
7.
A0035802
 10 Navigation in the operating menu
A Function group selection
B Function selection
1. To enter the operating menu, press the E key for longer than 3 s.
2. Select the "Function group" with the + or − key.
3. Select the "Function" with the E key.
4. If software locking is enabled, it must be disabled before making entries or changes.
Enter and change the parameters with the + or − key.
5. Press the E key to return to "Function".
6. Press the E repeatedly to return to "Function group" until the relevant function group is
reached.
7. To return to the measuring position (Home), press the E key for longer than 3 s.
8. To display the prompt to save data (press + or − to select the option "YES" or "NO"),
confirm with the E key.
If "YES" is selected when asked to save the data, changes are made to the parameter
settings.

Operating options Flow switch ODTT31, ODTT35
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6.2.2 Navigating the Calibration (CAL) function group
Variable limits for HIF (Learn High Flow) or LOWF (Learn Low Flow) can be set with the
'Learn Function'.
• HIF setting (Learn High Flow): Enter any flow rate from 70 to 100 % of the maximum value
in the process. The device then uses this value to automatically calculate the corresponding
100 % value.
• LOWF setting (Learn Low Flow): Enter any flow rate from 0 to 20 % of the maximum value
in the process. The device then uses this value to automatically calculate the corresponding
0 % value.
B
OUT
C
E
E
CAL
HIF RUN
LOWF
> 2 s
> 60 s
~ 10 s
WAIT
OK W432
E
80%
0%
1.
2. 3. 4.
5.
6.
7.
A0010787
 11 Navigating the 'Learn' function taking the example of the Calibration (CAL) function group
B Function selection
C Selection of settings
1. Select the "HIF" (Learn High Flow) or "LOWF" (Learn Low Flow) function with the E key.
2. Select the "RUN" function with the + key; the Learn function is initialized.
3. Select the flow rate with the + key; press for longer than 2 s.
4. If "HIF" (Learn High Flow) is set, the upper flow rate (70 to 100 %) is selected. Enter the
current relative flow rate in increments of 1 % with the + or - key (factory setting 80 %).
5. If "LOWF" (Learn Low Flow) is set, the lower flow rate (0 to 20 %) is selected. Enter the
current relative flow rate in increments of 1 % with the + or - key (factory setting 0%).
6. Select the "WAIT" function with the E key.
7. Accept ('learn') the current measured value after approx. 10 s- "OK" appears on the
display.