Endress+Hauser Proline t-mass 65 User manual

BA115D/06/en/02.06
71021612
Valid as of version
V 3.02.XX (Device software)
Operating Instructions
Proline t-mass 65
MODBUS RS485
Thermal Mass Flow Measuring System

Proline t-mass 65 MODBUS RS485 Table of contents
3
Table of contents
1 Safety instructions . . . . . . . . . . . . . . . . 5
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Installation, commissioning and operation . . . . . . . . 5
1.3 Operational safety . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Notes on safety conventions and icons . . . . . . . . . . . 6
2 Identification . . . . . . . . . . . . . . . . . . . . 7
2.1 Device designation . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.1 Nameplate of the transmitter . . . . . . . . . . . . 7
2.1.2 Nameplate of the sensor . . . . . . . . . . . . . . . 8
2.1.3 Nameplate for connections . . . . . . . . . . . . . 9
2.2 Certificates and approvals . . . . . . . . . . . . . . . . . . . 10
2.3 Registered trademarks . . . . . . . . . . . . . . . . . . . . . . 10
3 Installation . . . . . . . . . . . . . . . . . . . . . 11
3.1 Incoming acceptance, transport and storage . . . . . . 11
3.1.1 Incoming acceptance . . . . . . . . . . . . . . . . . 11
3.1.2 Transport . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Installation conditions . . . . . . . . . . . . . . . . . . . . . . 12
3.2.1 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2.2 Pipework requirements . . . . . . . . . . . . . . . 12
3.2.3 Orientation . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2.4 Inlet and outlet runs . . . . . . . . . . . . . . . . . 14
3.2.5 Outlet runs with pressure
measuring points . . . . . . . . . . . . . . . . . . . . 16
3.2.6 Perforated plate flow conditioner . . . . . . . . 16
3.2.7 Flow direction alignment for
the flanged version . . . . . . . . . . . . . . . . . . 17
3.2.8 Flow direction alignment for
the insertion version . . . . . . . . . . . . . . . . . 17
3.2.9 Insertion depth for
the insertion version . . . . . . . . . . . . . . . . . 18
3.2.10 Low pressure retractable
process connection . . . . . . . . . . . . . . . . . . 19
3.2.11 System pressure . . . . . . . . . . . . . . . . . . . . . 22
3.2.12 External pressure compensation . . . . . . . . . 23
3.2.13 Temperature range . . . . . . . . . . . . . . . . . . 23
3.2.14 Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2.15 Thermal insulation . . . . . . . . . . . . . . . . . . 24
3.2.16 Vibrations . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3 Installation instructions . . . . . . . . . . . . . . . . . . . . . 25
3.3.1 Turning the transmitter housing . . . . . . . . 25
3.3.2 Installing the wall-mount
transmitter housing . . . . . . . . . . . . . . . . . . 25
3.3.3 Turning the local display . . . . . . . . . . . . . . 27
3.4 Post-installation check . . . . . . . . . . . . . . . . . . . . . . 28
4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1 Cable specification MODBUS RS485 . . . . . . . . . . . 29
4.1.1 Cable type . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1.2 Shielding and grounding . . . . . . . . . . . . . . 30
4.2 Connecting the remote version . . . . . . . . . . . . . . . 31
4.2.1 Connecting connecting
cable for sensor/transmitter . . . . . . . . . . . . 31
4.2.2 Cable specification, connecting cable . . . . . 32
4.3 Connecting the measuring unit . . . . . . . . . . . . . . . 32
4.3.1 Terminal assignment . . . . . . . . . . . . . . . . . 32
4.3.2 Transmitter connection . . . . . . . . . . . . . . . 32
4.3.3 MODBUS RS485 connection
diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.4 Degree of protection . . . . . . . . . . . . . . . . . . . . . . . 34
4.5 Post-connection check . . . . . . . . . . . . . . . . . . . . . . 35
5 Operation . . . . . . . . . . . . . . . . . . . . . . 36
5.1 Quick operation guide . . . . . . . . . . . . . . . . . . . . . . 36
5.2 Local display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2.1 Display and operating elements . . . . . . . . . 37
5.2.2 Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.3 Brief operating instructions to the
function matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.3.1 General notes . . . . . . . . . . . . . . . . . . . . . . 39
5.3.2 Enabling the programming mode . . . . . . . . 39
5.3.3 Disabling the programming mode . . . . . . . . 39
5.4 Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.4.1 Type of error . . . . . . . . . . . . . . . . . . . . . . . 40
5.4.2 Error message type . . . . . . . . . . . . . . . . . . . 40
5.5 MODBUS RS485 communication . . . . . . . . . . . . . 41
5.5.1 MODBUS RS485 technology . . . . . . . . . . . 41
5.5.2 MODBUS telegram . . . . . . . . . . . . . . . . . . 43
5.5.3 MODBUS function codes . . . . . . . . . . . . . . 44
5.5.4 Maximum number of writes . . . . . . . . . . . 45
5.5.5 MODBUS register addresses . . . . . . . . . . . . 45
5.5.6 MODBUS error messages . . . . . . . . . . . . . 48
5.5.7 MODBUS auto-scan buffer . . . . . . . . . . . . . 48
5.6 Operating options . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.6.1 Operating program
“ToF Tool - Fieldtool Package” . . . . . . . . . . 53
5.6.2 Operating program
“FieldCare” . . . . . . . . . . . . . . . . . . . . . . . . 53
5.6.3 Device drivers for operating programs . . . . 53
5.7 Hardware settings . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.7.1 Hardware write protection,
switching on and off . . . . . . . . . . . . . . . . . 54
5.7.2 Configuring the device address . . . . . . . . . . 55
5.7.3 Configuring the terminating resistors . . . . . 56

Proline t-mass 65 MODBUS RS485 Table of contents
4
6 Commissioning . . . . . . . . . . . . . . . . . . 57
6.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
6.2 Switching on the measuring device . . . . . . . . . . . . 57
6.3 Quick Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
6.3.1 Quick Setup
“Commissioning” . . . . . . . . . . . . . . . . . . . 58
6.3.2 Quick Setup
“Communication” . . . . . . . . . . . . . . . . . . . 60
6.3.3 Data back-up with
T-DAT SAVE/LOAD function . . . . . . . . . . 62
6.4 Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
6.4.1 Zero point adjustment . . . . . . . . . . . . . . . . 63
6.5 Data storage device (HistoROM) . . . . . . . . . . . . . . 64
6.5.1 HistoROM/S-DAT
(sensor-DAT) . . . . . . . . . . . . . . . . . . . . . . . 64
6.5.2 HistoROM/T-DAT
(transmitter-DAT) . . . . . . . . . . . . . . . . . . . 64
7 Maintenance . . . . . . . . . . . . . . . . . . . . 65
7.1 External cleaning . . . . . . . . . . . . . . . . . . . . . . . . . 65
7.2 Pipe cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
7.3 Transducer cleaning . . . . . . . . . . . . . . . . . . . . . . . 65
7.4 Replacing seals . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
7.5 In-situ calibration . . . . . . . . . . . . . . . . . . . . . . . . . 65
8 Accessories . . . . . . . . . . . . . . . . . . . . . 66
8.1 Device-specific accessories . . . . . . . . . . . . . . . . . . . 66
8.2 Measuring principle-specific accessories . . . . . . . . . 66
8.3 Service-specific accessories . . . . . . . . . . . . . . . . . . 67
9 Trouble-shooting . . . . . . . . . . . . . . . . . 68
9.1 Trouble-shooting instructions . . . . . . . . . . . . . . . . . 68
9.2 System error messages . . . . . . . . . . . . . . . . . . . . . . 69
9.2.1 List of system error messages . . . . . . . . . . 70
9.3 Process error messages . . . . . . . . . . . . . . . . . . . . . . 74
9.3.1 List of process error messages . . . . . . . . . . 74
9.4 Process errors without messages . . . . . . . . . . . . . . 75
9.5 Response of totalizers and MODBUS
communication to errors . . . . . . . . . . . . . . . . . . . . 76
9.6 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
9.6.1 Removing and installing
printed circuit boards . . . . . . . . . . . . . . . . . 78
9.6.2 Replacing the device fuse . . . . . . . . . . . . . . 83
9.7 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.8 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.9 Software history . . . . . . . . . . . . . . . . . . . . . . . . . . 84
10 Technical data . . . . . . . . . . . . . . . . . . . 85
10.1 Technical data at a glance . . . . . . . . . . . . . . . . . . . 85
10.1.1 Applications . . . . . . . . . . . . . . . . . . . . . . . 85
10.1.2 Function and system design . . . . . . . . . . . 85
10.1.3 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
10.1.4 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
10.1.5 Power supply . . . . . . . . . . . . . . . . . . . . . . 88
10.1.6 Performance characteristics . . . . . . . . . . . . 88
10.1.7 Operating conditions: Installation . . . . . . . 89
10.1.8 Operating conditions: Environment . . . . . . 89
10.1.9 Operating conditions: Process . . . . . . . . . . 89
10.1.10 Mechanical construction . . . . . . . . . . . . . 90
10.1.11 Human interface . . . . . . . . . . . . . . . . . . . 92
10.1.12 Certificates and approvals . . . . . . . . . . . . . 93
10.1.13 Ordering information . . . . . . . . . . . . . . . . 94
10.1.14 Accessories . . . . . . . . . . . . . . . . . . . . . . . 94
10.1.15 Documentation . . . . . . . . . . . . . . . . . . . . 94
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Proline t-mass 65 MODBUS RS485 Safety instructions
5
1 Safety instructions
1.1 Designated use
The measuring device described in these Operating Instructions is to be used only for measuring the
mass flow rate of gases. At the same time, the system also measures gas temperature and calculates
other variables such as corrected volume flow. The measuring device can be configured to measure
pure gases or gas mixtures.
Examples:
• Compressed air
• Oxygen
• Nitrogen
• Carbon Dioxide
•Argon,etc.
The use with saturated and wet/dirty gases should be treated with caution (contact your
Endress+Hauser representative). The use with unstable gases should be avoided.
Resulting from incorrect use or from use other than that designated, the operational safety of the
measuring devices can be jeopardized. The manufacturer accepts no liability for damages being
produced from this.
1.2 Installation, commissioning and operation
Note the following points:
• Installation, connection to the electricity supply, commissioning and maintenance of the device
must be carried out by trained, qualified specialists authorised to perform such work by the
facility's owner operator.
The specialist must have read and understood these Operating Instructions and must follow the
instructions they contain.
• The device must be operated by persons authorised and trained by the facility's owner-operator.
Strict compliance with the instructions in the Operating Instruction is mandatory.
• Endress+Hauser is willing to assist in clarifying the chemical resistance properties of parts wetted
by special fluids, including fluids used for cleaning. However small changes in temperature,
concentration or the degree of contamination in the process can result in changes of the chemical
resistance properties. Therefore, Endress+Hauser can not guarantee or accept liability for the
chemical resistance properties of the fluid wetted materials in a specific application. The user is
responsible for the choice of fluid wetted materials in regards to their in-process resistance to
corrosion.
• If carrying out welding work on the piping, the welding unit should not be grounded by means
of the measuring device.
• The installer must ensure that the measuring system is correctly wired in accordance with the
wiring diagrams. The transmitter must be earthed unless special protection measures have been
taken e.g. galvanically isolated power supply SELV or PELV! (SELV = Safe Extra Low Voltage;
PELV = Protective Extra Low Voltage)
• Invariably, local regulations governing the opening and repair of electrical devices apply.

Safety instructions Proline t-mass 65 MODBUS RS485
6
1.3 Operational safety
Note the following points:
• Measuring systems for use in hazardous environments are accompanied by separate
“Ex documentation”, which is an integral part of these Operating Instructions. Strict compliance
with the installation instructions and ratings as stated in this supplementary documentation is
mandatory.
The symbol on the front of this supplementary Ex documentation indicates the approval and the
certification body ( 0Europe, 2USA, 1Canada).
• The measuring device complies with the general safety requirements in accordance with
EN 61010-1, the EMC requirements of EN 61326/A1, and NAMUR recommendation NE 21
and NE 53.
• The separate document on the Pressure Equipment Directive must be observed for devices used
in Category II, III or IV installations in accordance with the Pressure Equipment Directive.
• The manufacturer reserves the right to modify technical data without prior notice. Your
Endress+Hauser distributor will supply you with current information and updates to these
Operating Instructions.
1.4 Return
The following procedures must be carried out before a flowmeter requiring repair or calibration,
for example, is returned to Endress+Hauser:
• Always enclose a duly completed “Declaration of contamination” form. Only then can
Endress+Hauser transport, examine and repair a returned device.
• Enclose special handling instructions if necessary, for example a safety data sheet as per
EN 91/155/EEC.
• Remove all residues. Pay special attention to the grooves for seals and crevices which could
contain residues. This is particularly important if the substance is hazardous to health, e.g.
flammable, toxic, caustic, carcinogenic, etc.
!Note!
You will find a preprinted “Declaration of contamination” form at the back of this manual.
#Warning!
• Do not return a measuring device if you are not absolutely certain that all traces of hazardous
substances have been removed, e.g. substances which have penetrated crevices or diffused
through plastic.
• Costs incurred for waste disposal and injury (burns, etc.) due to inadequate cleaning will be
charged to the owner-operator.
1.5 Notes on safety conventions and icons
The devices are designed to meet state-of-the-art safety requirements, have been tested, and left the
factory in a condition in which they are safe to operate. The devices comply with the applicable
standards and regulations in accordance with EN 61010-1 “Protection Measures for Electrical
Equipment for Measurement, Control, Regulation and Laboratory Procedures”. They can, however,
be a source of danger if used incorrectly or for other than the designated use.
Consequently, always pay particular attention to the safety instructions indicated in these Operating
Instructions by the following icons:
#Warning!
“Warning” indicates an action or procedure which, if not performed correctly, can result in injury
or a safety hazard. Comply strictly with the instructions and proceed with care.
"Caution!
“Caution” indicates an action or procedure which, if not performed correctly, can result in incorrect
operation or destruction of the device. Comply strictly with the instructions.
!Note!
“Note” indicates an action or procedure which, if not performed correctly, can have an indirect
effect on operation or trigger an unexpected response on the part of the device.

Proline t-mass 65 MODBUS RS485 Identification
7
2 Identification
2.1 Device designation
The “t-mass 65” flow measuring system consists of the following components:
• t-mass 65 transmitter
• t-mass F, t-mass I sensors
Two versions are available:
• Compact version: transmitter and sensor form a single mechanical unit.
• Remote version: transmitter and sensor are installed separately
2.1.1 Nameplate of the transmitter
A0005511
Fig. 1: Nameplate specifications for the “t-mass 65 MODBUS RS485” transmitter (example)
1 Order code / serial number: See the specifications on the order confirmation for the meanings of the individual
letters and digits
2 Power supply / frequency: 20 to 55 V AC /16 to 62 V DC / 50 to 60 Hz
Power consumption: 14 VA / 8 W
3 Available inputs / outputs
4 Reserved for information on special products
5 Ambient temperature range
6 Degree of protection
Order Code:
Ser.No.:
TAG No.:
20-53VAC/16-62VDC
50-60Hz 14VA/8W
IP67/NEMA/Type4X65F25-XXXXXXXXXXXX
12345678901
ABCDEFGHJKLMNPQRST
–20°C (–4°F) < Tamb < +60°C (+140°F)
MODBUS RS485, STATUS-IN
Proline t-mass 65
i
N12895
1
2
3
4
56

Identification Proline t-mass 65 MODBUS RS485
8
2.1.2 Nameplate of the sensor
A0005512
Fig. 2: Nameplate specifications for the “t-mass F” sensor (example)
1 Order code / serial number: See the specifications on the order confirmation for the meanings of the individual
letters and digits
2 Nominal diameter device: DN 50
Nominal pressure: EN (DIN) PN 40 bar
3 Pressure range: –0.5 to 40 bar / –7.25 to 580 psi (gauge)
4 Temperature range: –40 °C to +100 °C / –40 °F to +212 °F
5 Material of measuring tubes: Stainless steel 316/316L/1.4404/Alloy C-22
6Sealmaterial:EPDM
7 Reserved for information on special products (example):
– With material certificate for wetted materials
8 Ambient temperature range
9 Degree of protection
10 Reserved for additional information on device version (approvals, certificates)
1
2
4
5
6
7
8
10
9
3
Proline t-mass F
N12895
ABCDEFGHIJKLMNOPQRSTTAG-No.:
Ser.No.: 12345678901
Order Code:
IP67 / NEMA/Type 4X
65F50-XXXXXXXXXXXX
P:
T:
Materials:
Seal:
3.1
-0.5...40bar / -7.25...+580 psi gauge
EPDM
316/316L/1.4404/Alloy C 22-
-40°C...+100°C / -40°F...+212°F
-20°C(-4°F) <Tamb< +60°C(+140°F)
i
DN50 DIN/EN PN40

Proline t-mass 65 MODBUS RS485 Identification
9
2.1.3 Nameplate for connections
A0005513
Fig. 3: Nameplate specifications for transmitter connections (example)
1 Serial number
2 Possible configuration of current output
3 Possible configuration of relay contacts
4 Terminal assignment, cable for power supply: 85 to 260 V AC, 20 to 55 V AC, 16 to 62 V DC
Terminal No. 1: L1 for AC, L+ for DC
Terminal No. 2: N for AC, L- for DC
5 Pending signals at the inputs and outputs possible configurations and terminal assignment →Page 32
6 Version of device software currently installed
7 Installed communication type
8 Information on communication driver
9 Date of installation
10 Current updates to data specified in points 6 to 9
2
3
1
4
5
6
7
8
9
10
Device SW:
01.Dec 2005
MODBUS RS485
ID –––Drivers:
Communication:
Date:
SW-version Ex-works
See Operating manual
Betriebsanleitung beachten
Observer Manuel d'Instruction
N/L-
PE
L1/L+
1 2
319475-0011
20(+)/21(-)
22(+)/23(-)
24(+)/25(-)
26(+)/27(-)
NC:
NO:
P:
A:
Tension d'alimentation
Versorgung /
Supply /
12345678912 Ser. No.:
normally open contact
normally closed contact
passive
active
Update 2
MODBUS RS485
3.02.00
27 = A (RxD/TxD-N)
26 = B (RxD/TxD-P)
STATUS-IN
3...30VDC, Ri = 3 kOhm

Identification Proline t-mass 65 MODBUS RS485
10
2.2 Certificates and approvals
The devices are designed in accordance with good engineering practice to meet state-of-the-art
safety requirements, have been tested, and left the factory in a condition in which they are safe to
operate. The devices comply with the applicable standards and regulations in accordance with
EN 61010-1 “Protection Measures for Electrical Equipment for Measurement, Control, Regulation
and Laboratory Procedures” and with the EMC requirements of EN 61326/A1.
The measuring system described in these Operating Instructions thus complies with the statutory
requirements of the EC Directives. Endress+Hauser confirms successful testing of the device by
affixing to it the CE mark.
The measuring system complies with the EMC requirements of the “Australian Communications
Authority (ACA)”.
The measuring device meets all the requirements of the MODBUS/TCP conformity test and holds
the “MODBUS/TCP Conformance Test Policy, Version 2.0”. The measuring device has successfully
passed all the test procedures carried out and is certified by the “MODBUS/TCP Conformance Test
Laboratory” of the University of Michigan.
2.3 Registered trademarks
KALREZ®and VITON®
Registered trademarks of E.I. Du Pont de Nemours & Co., Wilmington, USA
MODBUS®
Registered trademark of the MODBUS Organization
HistoROM™, S-DAT®, T-DAT™, F-CHIP®, ToF Tool - Fieldtool®Package, Fieldcheck®,
Applicator®, t-mass®
Registered or registration-pending trademarks of Endress+Hauser Flowtec AG, Reinach, CH

Proline t-mass 65 MODBUS RS485 Installation
11
3 Installation
3.1 Incoming acceptance, transport and storage
3.1.1 Incoming acceptance
On receipt of the goods, check the following points:
• Check the packaging and the contents for damage.
• Check the shipment, make sure nothing is missing and that the scope of supply matches your
order.
3.1.2 Transport
The following instructions apply to unpacking and to transporting the device to its final location:
• Transport the devices in the containers in which they are delivered.
• The covers or caps fitted to the process connections prevent mechanical damage to the
transducers during transportation and storage. Consequently, do not remove these covers or caps
until immediately before installation.
• Do not lift measuring devices of nominal diameters DN 40 to 100 (1½" to 4") by the transmitter
housing or the connection housing in the case of the remote version (Fig. 4). Use webbing slings
slung round the two process connections. Do not use chains, as they could damage the housing.
#Warning!
Risk of injury if the measuring device slips. The center of gravity of the assembled measuring device
might be higher than the points around which the slings are slung.
At all times, therefore, make sure that the device does not unexpectedly turn around its axis or slip.
a0004294
Fig. 4: Instructions for transporting sensors with DN 40 to 100 (1½" to 4")
3.1.3 Storage
Note the following points:
• Pack the measuring device in such a way as to protect it reliably against impact for storage (and
transportation). The original packaging provides optimum protection.
• The permissible storage temperature is –40 to +80 °C (–40 °F to 176 °F).
Preferably +20 °C (+68 °F).
• Do not remove the protective covers or caps on the process connections until you are ready to
install the device.
• The measuring device must be protected against direct sunlight during storage in order to avoid
unacceptably high surface temperatures.

Installation Proline t-mass 65 MODBUS RS485
12
3.2 Installation conditions
Note the following points:
• The thermal dispersion principle is very sensitive to low flow rates and disturbed flow conditions.
• Observe the recommended inlet and outlet requirements.
• Good engineering practice is necessary for the associated pipe work and installation.
• Ensure correct alignment and orientation of the sensor.
• Avoid condensation forming around the transducers.
• Consider the nature of the gas or gas mixture (dryness, cleanliness, stability, fraction, etc.)
• The maximum permitted ambient temperatures (→Page 89) and the medium temperature
range (→Page 89) must be observed.
• If possible, locate the sensor to avoid extreme changes in ambient temperature and process
condititons.
• For mechanical reasons, and in order to protect the pipe, it is advisable to support heavy sensors.
3.2.1 Dimensions
All the dimensions and lengths of the sensor and transmitter are provided in the separate
documentation “Technical Information”.
3.2.2 Pipework requirements
Good construction practice should be followed at all times:
• Correct welding techniques
• Correctly sized gaskets
• Correctly aligned flanges and gaskets
• The use of seamless pipe immediately upstream of the flowmeter.
• The use of pipework with a matching internal diameter to that of the flowmeter to ensure that no
step disturbance greater than 1 mm (0.04 inch) can occur at the meter inlet or outlet
(3 mm (0.12 inch) for diameters > DN 200 (8")).
• As a general comment, anything that disturbs the smoothness of the internal pipe wall within the
dimensions stated below should be eliminated; the goal should be a smooth uninterrupted inter-
nal surface.
For further information please refer to ISO 14511.
"Caution!
Newly installed piping should be free of contaminants and particles to prevent damage to the sensing
elements.
a0005103
Butt welded joint
a0005104 a0005105 a0005106
Pipe diameter one is not equal pipe
diameter two
Incorrectly sized gaskets Incorrectly aligned flanges and gaskets
✔
✘ ✘ ✘

Proline t-mass 65 MODBUS RS485 Installation
13
3.2.3 Orientation
The device can generally be installed in any position in the piping. In the case of wet/dirty gases,
upward flow is prefered in vertical pipes to minimise condensation/contamination. Where free
condensation can occur (e.g. Biogas) the sensor should be orientated to prevent water collecting on
or around the transducer.
Make sure that the direction arrow on the sensor matches the direction of flow (direction of fluid
flow through the pipe).
Flanged version Insertion version
Vertical orientation
a0005107
compact
ÃÃ
remote
ÃÃ
a0005110
compact
Ã
remote
ÃÃ
Horizontal orientation:
a0005108
compact
ÃÃ
remote
ÃÃ
a0005111
compact
ÃÃ
remote
ÃÃ
Horizontal orientation:
a0005109
compact
✘
remote
✘
a0005112
compact
✘
remote
✘
ÃÃ = Recommended orientation
Ã= Orientation recommended in certain situations
✘= Not recommended

Installation Proline t-mass 65 MODBUS RS485
14
3.2.4 Inlet and outlet runs
The sensitivity of the thermal dispersion principle to low flow rates means the flowmeter can also
be sensitive to internal disturbances in the flowing gas stream (e.g. swirl), especially in the larger
pipe diameters ≥DN 150 (≥6").
As a general rule, the installed thermal flow sensor should always be installed as far away as possible
from any flow disturbances (see ISO14511 for further information).
Process components or pipework configuration
When disturbances (e. g. pipe elbows, reducers, valves, T-pieces etc.) are located upstream of the
thermal meter, precautions must be taken to minimise any effects on the measuring performance.
The figure on the following page illustrates the minimum recommended inlet and outlet runs,
expressed in multibles of the pipe diameter. Longer lengths should always be used if they are
available.
Regardless of any other consideration, the minimum recommendations for inlet and outlet runs on
either side of the sensor are:
Inlet runs:
Minimum 15 x DN for the flanged version (65F)
Minimum 20 x DN for the insertion version (65I)
Outlet runs:
Minimum 2 x DN for the flanged version (65F)
Minimum 5 x DN for the insertion version (65I)
!Note!
• These are minimum values, increasing these dimensions will often improve the flowmeter
perfomance.
• Where two or more disturbances are located upstream of the meter, the longest recommended
upstream pipe run is to be observed as an absolute minimum.
• It is always recomended to install control valves downstream of the flowmeter.
• For very light gases such as Helium and Hydrogen all upstream distances should be doubled.

Proline t-mass 65 MODBUS RS485 Installation
15
a0005113
Fig. 5: The figure above illustrates the minimum recommended inlet und outlet runs expressed in multiples of the pipe
diameter.
1 = Reduction
2 = Expansion
3 = 90° elbow or T-piece
4 = 2 x 90° elbow
5 = 2 x 90° elbow, 3-dimensional
6 = Control valve (where possible a modulating control valve should be mounted downstream of a flowmeter)
a = Inlet run
b= Outlet run
!Note!
Wherever possible mount any control and butterfly shut off valves downstream of the flowmeter.
15xDN 2xDN
a
1
b
3ab
15xDN 2xDN
5
ab
20xDN 2xDN
4
ab
35xDN 2xDN
6ab
50xDN 2xDN
2ab
15xDN 2xDN
ab
20 x DN 5xDN
ab
20 x DN 5xDN
ab
20 x DN 5xDN
ab
25 x DN 5xDN
ab
40 x DN 5xDN
ab
50 x DN 5xDN

Installation Proline t-mass 65 MODBUS RS485
16
3.2.5 Outlet runs with pressure measuring points
The pressure measuring point should be installed downstream of the measuring device, so that there
is no potential influence of the pressure transmitter process connection on the flow entering the
measuring point.
a0005114
Fig. 6: Installing a pressure measuring point (PT = pressure transmitter)
3.2.6 Perforated plate flow conditioner
It is recommended to install a perforated plate flow conditioner if the recommended inlet runs are
not available.
a0005115
Fig. 7: The figure above illustrates the minimum recommended inlet and outlet runs expressed in multiples of the pipe
diameter using a flow conditioner.
1 = Flow conditioner with the flanged version / 2 = Flow conditioner with the insertion version
a = Inlet run / b = Outlet run
Flow conditioner (35 hole) for use with insertion sensors
The well known "Mitsubishi" design is recommended for this application DN 80 mm (3") to DN
300 mm (12"). For the majority of gas types, the flow conditioner must be installed at a distance of
10 x DN upstream of the sensor. A further 5 pipe diameters inlet run is required upstream of the
actual conditioner itself.
Flow conditoner (19 hole) for use with flanged sensors
This is a special Endress+Hauser version designed specially for use with the t-mass F sensor (Sizes
DN 25 to 100 /1" to 4"). The flow conditioner should be fitted immediately upstream of the flanged
sensor. A further 5 pipe diameters inlet run is required upstream of the actual conditioner itself.
For optimum performance, it is advised that the t-mass F sensor and flow conditioner are ordered
at the same time such that they are calibrated together. To retrospectively fit a flow conditioner will
have a small effect on the measurement performance.
!Note!
The use of other types of flow conditioners, other than the Endress+Hauser flow conditioner, with
the t-mass F sensor will have an impact on the measurement performance due to the effects of flow
profile and pressure drop.
The flow conditioner is fitted between two piping flanges and centered with mounting bolts.
PT
2...5 x DN
2xDN
b
5xDN
a
10xDN 5xDN
ab
5xDN
21

Proline t-mass 65 MODBUS RS485 Installation
17
a0005116
Fig. 8: Flow conditioner mounting arrangement (example)
1 = Perforated plate flow conditioner
2 = Seal/gasket
3 = Notch
!Note!
The flow conditioner has a notch to indicate the alignment position (mount vertically).
3.2.7 Flow direction alignment for the flanged version
The arrows on the sides of the sensor housing assembly are pointing in the same direction as the
flow.
3.2.8 Flow direction alignment for the insertion version
It is very important that the sensor is aligned correctly with the direction of flow. There are two
guidelines for correct alignment:
• The arrows on the sides of the sensor housing assembly are pointing in the same direction as the
flow.
• The graduated scale on the insertion tube section should be aligned directly upstream of the flow
direction.
To ensure optimum exposure of the measuring transducers to the flowing gas stream, the sensor
must not be rotated more than 7 degrees from this alignment.
a0005117
Fig. 9: It is important to keep the 90° degree angle
A = Flow direction alignment
B = Vertical alignment
1
2
2
3
90°
90°
AB

Installation Proline t-mass 65 MODBUS RS485
18
Vertical alignment
It is important that the sensor mounting boss is welded to the pipe or duct such that the sensor is
mounted at 90 degrees to the flow direction. Any deviation from this angle in any plane may cause
flow disturbances around the measuring point that could cause errors.
!Note!
The thermal sensor cannot differntiate between forward and reverse flow. These guidelines are only
to ensure correct installation and aligment.
3.2.9 Insertion depth for the insertion version
Sensor installation - Adjustable insertion sensor
When installing the sensor, the following three dimensions need to be taken into account to allow
the correct insertion length to be specified:
• A = Internal diameter of the circular pipe. For a rectangular duct; the duct height if the sensor is
to be mounted vertically or duct width if it is to be mounted horizontally
• B = Pipe wall or duct wall thickness
• C = Depth of mounting boss on the pipe or duct, including the sensor compression fitting and
cold tap (if used).
a0005118
Fig. 10: Dimensions required to calculate the sensor insertion depth
Insertion sensors fitted with an adjustable insertion probe depth
(i. e. screwed process connection)
The tube section is supplied with a graduated scale along its length (in millimetres or inches). It is
important that the sensor be installed so that the top of the compression fitting is aligned with the
value on the scale that is equal to the following calculated value:
For pipe diameter:
• = DN 80 (3"): (0.3 x A) + B + C + 2 mm (0.079 inch)
•≥DN 100 (4"): (0.2 x A) + B + C + 3 mm (0.12 inch)
For duct width (horizontal installation) or duct height (vertical installation):
• < DN 100 (4"): (0.3 x A) + B + C + 2 mm (0.079 inch)
•≥DN 100 (4"): (0.2 x A) + B + C + 3 mm (0.12 inch)
When the sensor is at the correct insertion depth the sensor must next be aligned for the correct
flow direction detection. After alignment, the compression fitting must be tightened to secure and
seal the insertion tube. Tighten the two securing screws.
ABC ABC
230
220
210
200
190
180
9
8
7
230
220
210
200
190
180
9
8
7
230
220
210
200
190
180
9
8
7

Proline t-mass 65 MODBUS RS485 Installation
19
!Note!
These mounting guidelines assume that a standard mounting boss provided by Endress+Hauser is
being used (see Accessories on Page 66).
#Warning!
The following tightening tensions for the compression fitting must be observed:
• Locking nut: Hand tight, then 1¼ turns with a wrench
• Anti-vibration screws: 5 Nm (3.89 lbf ft)
3.2.10 Low pressure retractable process connection
The insertion sensor can be mounted in a “cold tap” process connection.
Cold Tap
It allows the removal of an insertion sensor from a pipe or duct when the process is stopped and no
pressure and extreme temperature are present. Following removal, closure of the isolation valve
permits the restarting of the process.
a0005119
Fig. 11: Cold tap process connection
1 = Compression gland
2 = Isolation valve
1
2

Installation Proline t-mass 65 MODBUS RS485
20
Installing
The mounting location is determined by the installation requirements for an insertion type sensor.
Pay particular attention to mounting orientation and inlet and outlet length. See this chapter for
details.
#Warning!
Stop the process gas flow and de-pressurize the process line. Purge the line with an inert gas to
remove any hazardous or toxic gases. Allow the installation to cool to a safe temperature. Check
and verify that this is so before handling any metal parts. Ensure that the process cannot be re-
started during the installation procedure.
1. A cut-out of 31.0 mm ±0.5 mm (1.22" ±0.019") is required for the process fitting. Mark the
pipe accordingly and cut the hole with a suitable tool.
2. Finish the edges of the hole to ensure that all burrs are removed and that the required tolerance
is met. Remove any particles that may have fallen into the pipe.
3. Insert the process fitting into the pipe (a) and support it such that it is vertically aligned. Weld
the fitting to the pipe.
4. Check the integrity of the installation by running a static pressure test. Insert a blanking plug
into the screwed fitting end of the tube (b), open the ball valve (c) and apply pressure. Check
for leaks and, if necessary, correct the installation fault and repeat static pressure test.
a0005129
Fig. 12: Mounting the cold tap process connetction
5. If this static pressure test passes, de-pressurize the line and the insertion sensor can now be
installed. Open the ball valve and insert the sensor tube into the cold tap (d). Screw the com-
pression fitting into the threaded socket and tighten the lower nut with a wrench (e).
!Note!
– NPT threads: use thread tape
– G 1 A threads: the provided bonded seal must be fitted
– All threads are right hand (tighten clockwise)
6. Adjust the insertion sensor tube to the correct height (→Page 17), ensure correct orientation
and tighten the compression fitting upper nut with a wrench (f). Tighten the securing screws
(g).
7. Apply process pressure and again do a final check for leaks.
(corresponding graphic see next page)
a
b
c