ABB 2600T Series User manual

—
ABB MEASUREMENT & ANALYTICS | OPERATING INSTRUCTION
266 with FOUNDATION Fieldbus Communication
Pressure transmitters
Engineered solutions for all
applications
Measurement made easy
Introduction
The 2600T family provides comprehensive range of
top quality pressure measurement products,
specifically designed to meet the widest range of
applications ranging from arduous conditions in
offshore oil and gas to the laboratory environment
of the pharmaceutical industry.
For more information
Further publications for 2600T series pressure
products are available for free download from
www.abb.com/pressure
or by scanning this code:
—
266 models

22600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
Index
1 Introduction ............................... 4
Instruction manual structure....................... 4
Models covered by this manual ..................... 4
Product description ............................... 4
2 Safety ..................................... 4
General safety information. . . . . . . . . . . . . . . . . . . . . . . . . 4
Improper use...................................... 4
Technical limit values ...............................5
Warranty prevision .................................5
Use of instruction ..................................5
Operator liability ...................................5
Qualified personnel ................................5
Returning devices ..................................5
Disposal ...........................................5
Information on WEEE Directive 2012/19/EU ..........5
Transport and storage ............................. 6
Safety information for electrical installation ........ 6
Safety information for inspection and maintenance . 6
3 Transmitter overview ........................7
Transmitter components overview ..................7
Range & Span consideration ....................... 8
4 Opening the box .............................9
Identification ..................................... 9
Optional wired-on SST plate (I1)....................10
Handling..........................................10
Storage ...........................................10
5 Mounting ................................. 10
General ...........................................10
IP protection & designation ........................10
Mounting the transmitter .........................10
Pressure Equipment Directive (PED) (97/23/CE) .....12
Mounting a DP sensor transmitter .................12
Mounting a P style pressure transmitter ............19
Transmitter housing rotation ..................... 23
Impulse piping connection for standard instruments23
Process connections considerations............... 24
Kynar inserts connection ......................... 24
Screw torques for models with Kynar inserts....... 24
Installation recommendations .................... 25
6 Device introduction........................ 29
Fieldbus Foundation communication protocol ..... 29
Feature overview ................................. 29
Registration details .............................. 29
FF device structure ............................... 29
Device Application Process (DAP) ................. 29
Control Application Process (CAP) ................. 29
7 Transmitter wiring......................... 30
Cable connection................................. 30
FOUNDATION Fieldbus wiring..................... 30
Simple FF network and system architecture.........31
Wiring procedure..................................31
Grounding ....................................... 32
Protective Grounding............................. 32
Integrated lightning protection (optional) ......... 32
8 Electronics .................................33
Fault protection .................................. 33
On board switches ............................... 33
Factory default configuration ..................... 33
9 Local pushbuttons ......................... 34
Installing/Removing the external pushbuttons..... 34
Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10 HMI local indicator ........................ 36
Conventional version (L1 option) .................. 36
TTG (Trough The Glass) version (L5 option) ........ 36
Installing/Removing the LCD display .............. 36
Integral display rotation .......................... 36
LCD structure .....................................37
HMI operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
HMI as Variable Indicator ..........................37
HMI as Diagnostic Indicator....................... 38
Local operator menu ............................. 39
HMI as configuration tool .........................40
HMI as Feedback of the local push button
operations ....................................... 42
11 Device Configuration/Setting through FF
communication............................ 43
Commissioning .................................. 43

3
2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
Appendix A – Device Data Block ................. 50
Device application process (DAP) block .............51
Resource block (RB) ...............................51
Pressure transducer block (PRTB) ................. 56
Advanced diagnostic transducer block (ADTB) ..... 65
HMI transducer block (HMITB)..................... 70
Device diagnostic ................................ 73
Control application process (CAP) block ............81
Enhanced - analog input function block (E-AI) .......81
Enhanced - PID function block (E-PID) ............. 88
Arithmetic function block (AR) .................... 94
Input selector function block (IS).................. 99
Control selector function block (CS) .............. 103
Signal characterized function block (SC) .......... 106
Integrator function block (IT) .....................110
AppendixB – Device installation and commissioning
into ABB Control System ...................118
Importing of the FF device drivers DD&CFF
in the host .......................................118
Design of the FF H1 network...................... 120
Design of the Function Block Application (FBAP) .. 122
Assignment of the FF devices .................... 123
Downloading of the FBAP into the H1 network
and devices ..................................... 125
Device and/or Blocks configuration ...............127
12 Maintenance ............................. 129
Returns and removal............................. 129
Pressure transmitter sensor ..................... 129
Removing/Installing the process flanges ......... 129
Pressure transducer replacement ................ 130
13 Hazardous Area considerations.............131
Ex Safety aspects and IP Protection (Europe) ......131
Ex Safety Aspects (North America) ............... 135

42600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
1 Introduction
Instruction manual structure
The present manual provides information on installing,
operating, troubleshooting the 266 pressure transmitter. Every
section of the present manual is specifically dedicated to the
specific phase of the transmitter lifecycle starting from the
receipt of the transmitter and its identification, passing to the
installation, to the electrical connections, to the configuration
and to the troubleshooting and maintenance operations.
Models covered by this manual
The present manual can be used for all the 266 models with
exception done for the 266C (multivariable version).
Product description
The pressure transmitters model 266 is a modular range of
fieldmounted, microprocessor based electronic transmitters,
multiple sensor technologies. Accurate and reliable
measurement of differential pressure, gauge and absolute
pressure, flow and liquid level is provided, in the even most
difficult and hazardous industrial environments. Model 266 can
be configured to provide specific industrial output signals
according to FOUNDATION Fieldbus communication.
2 Safety
General safety information
The “Safety” section provides an overview of the safety
aspects to be observed for operation of the device.
The device has been constructed in accordance with the state
of the art and is operationally safe. It has been tested and left
the factory in perfect working conditions. The information in
the manual, as well as the applicable documentation and
certificates, must be observed and followed in order to
maintain this condition throughout the period of operation.
Full compliance with the general safety requirements must be
observed during operation of the device. In addition to the
general information, the individual sections in the manual
contain descriptions of processes or procedural instructions
with specific safety information.
Only by observing all of the safety information can you reduce
to the minimum the risk of hazards for personnel and/or
environment. These instructions are intended as an overview
and do not contain detailed information on all available models
or every conceivable event that may occur during setup,
operation, and maintenance work.
For additional information, or in the event of specific problems
not covered in detail by these operating instructions, please
contact the manufacturer. In addition, ABB declares that the
contents of this manual are not part of any prior or existing
agreements, commitments, or legal relationships; nor are they
intended to amend these.
All obligations of ABB arise from the conditions of the relevant
sales agreement, which also contains the solely binding
warranty regulations in full. These contractual warranty
provisions are neither extended nor limited by the information
provided in this manual.
WARNING
Only qualified and authorized specialist personnel should
be charged with installation, electrical connection,
commissioning, and maintenance of the transmitter.
Qualified personnel are persons who have experience in
installation, electrical wiring connection, commissioning,
and operation of the transmitter or similar devices, and
hold the necessary qualifications such as:
• Training or instruction, i.e., authorization to operate and
maintain devices or systems according to safety
engineering standards for electrical circuits, high
pressures, and aggressive media
• Training or instruction in accordance with safety
engineering standards regarding maintenance and use of
adequate safety systems.
For safety reasons, ABB draws your attention to the fact
that only sufficiently insulated tools conforming to DIN EN
60900 may be used.
Since the transmitter may form part of a safety chain, we
recommend replacing the device immediately if any defects
are detected. In case of use in Hazardous Area non sparking
tools only must be employed.
In addition, you must observe the relevant safety regulations
regarding the installation and operation of electrical systems,
and the relevant standards, regulations and guidelines about
explosion protection.
WARNING
The device can be operated at high levels of pressure and
with aggressive media. As a result, serious injury or
significant property damage may occur if this device is
operated incorrectly.
Improper use
It is prohibited to use the device for the following purposes:
• As a climbing aid, e.g., for mounting purposes
• As a support for external loads, e.g., as a support for pipes.
• Adding material, e.g., by painting over the name plate or
welding/soldering on parts
• Removing material, e.g., by drilling the housing.
Repairs, alterations, and enhancements, or the installation of
replacement parts, are only permissible as far as these are
described in the manual. Approval by ABB must be requested
for any activities beyond this scope. Repairs performed by
ABB-authorized centers are excluded from this.

5
2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
Technical limit values
The device is designed for use exclusively within the values
stated on the name plates and within the technical limit values
specified on the data sheets.
The following technical limit values must be observed:
• The Maximum Working Pressure may not be exceeded.
• The Maximum ambient operating temperature may not be
exceeded.
• The Maximum process temperature may not be exceeded.
• The housing protection type must be observed.
Warranty prevision
Using the device in a manner that does not fall within the scope
of its intended use, disregarding this manual, using
underqualified personnel, or making unauthorized alterations,
releases the manufacturer from any liability for any resulting
damage. This makes the manufacturer’s warranty null and void.
Use of instruction
The symbols used in this document are explained below:
DANGER
The signal word ‘DANGER’ indicates an imminent danger.
Failure to observe this information will result in death or
severe injury.
WARNING
The signal word ‘WARNING’ indicates an imminent danger.
Failure to observe this information may result in death or
severe injury.
CAUTION
The signal word ‘CAUTION’ indicates an imminent danger.
Failure to observe this information may result in minor or
moderate injury.
NOTICE
The signal word ‘NOTICE’ indicates potential damage to
material or its surrounding area.
IMPORTANT
This message indicates operator tips or particularly useful
information. It does not indicate a dangerous or damaging
situation.
Operator liability
Prior to using corrosive and abrasive materials for measurement
purposes, the operator must check the level of resistance of all
parts coming into contact with the materials to be measured.
ABB will gladly support you in selecting the materials, but
cannot accept any liability in doing so.
The operators must strictly observe the applicable national
regulations with regard to installation, function tests, repairs,
and maintenance of electrical devices.
Qualified personnel
Installation, commissioning, and maintenance of the device
may only be performed by trained specialist personnel who
have been authorized by the plant operator. The specialist
personnel must have read and understood the manual and
comply with its instructions.
Returning devices
Use the original packaging or suitably secure shipping package
if you need to return the device for repair or recalibration
purposes. Fill out the return form (see the end of the document)
and include this with the device.
According to EC guidelines and other local laws for hazardous
materials, the owner of hazardous waste is responsible for its
disposal. The owner must observe the proper regulations for
shipping purposes.
All devices sent back to ABB must be free from any hazardous
materials (acids, alkalis, solvents, etc.).
Disposal
ABB actively promotes environmental awareness and has an
operational management system that meets the requirements
of DIN EN ISO 9001:2000, EN ISO 14001:2004, and OHSAS
18001. Our products and solutions are intended to have
minimum impact on the environment and persons during
manufacturing, storage, transport, use and disposal.
This includes the environmentally friendly use of natural
resources. ABB conducts an open dialog with the public
through its publications.
This product/solution is manufactured from materials that can
be reused by specialist recycling companies.
Information on WEEE Directive 2012/19/EU
This product or solution is subject to the WEEE Directive
2012/19/EU (Waste Electrical and Electronic Equipment) or
corresponding national laws. Starting from August 15th 2018,
electrical and electronic equipment marked with the crossed-
out wheeled bin symbol may not be disposed as unsorted
municipal waste. Waste of electrical and electronic equipment
(WEEE) shall be treated separately using the national collection
framework available to customers for the return, recycling and
treatment of WEEE.

62600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
Proper disposal prevents negative effects on people and the
environment, and supports the reuse of valuable raw materials.
ABB can accept and dispose of returns for a fee.
Transport and storage
• After unpacking the pressure transmitter, check the device
for transport damage.
• Check the packaging material for accessories.
• During intermediate storage or transport, store the pressure
transmitter in the original packaging only.
For information on permissible ambient conditions for storage
and transport, see “Technical data”. Although there is no limit
on the duration of storage, the warranty conditions stipulated
on the order acknowledgment from the supplier still apply.
Safety information for electrical installation
Electrical connections may only be established by authorized
specialist personnel in accordance with the electrical circuit
diagrams. The electrical connection information in the manual
must be observed; otherwise, the applicable protection type
may be affected. Ground the measurement system according
to requirements.
Safety information for inspection and
maintenance
WARNING
There is no EMC protection or protection against accidental
contact when the housing cover is open. There are electric
circuits within the housing which are dangerous if touched.
Therefore, the auxiliary power must be switched off before
opening the housing cover.
WARNING
The device can be operated at high pressure and with
aggressive media. Any process media released may cause
severe injuries. Depressurize the pipeline/tank before
opening the transmitter connection.
Corrective maintenance work may only be performed by trained
personnel.
• Before removing the device, depressurize it and any adjacent
lines or containers.
• Check whether hazardous materials have been used as
materials to be measured before opening the device.
• Residual amounts of hazardous substances may still be
present in the device and could escape when the device is
opened.
• Within the scope of operator responsibility, check the
following as part of a regular inspection:
– Pressure-bearing walls/lining of the pressure device
– Measurement-related function
– Leak-tightness
– Wear (corrosion)

7
2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
3 Transmitter overview
Transmitter components overview


IMPORTANT
Above pictures show only two different kinds of transmitters equipped with Barrel type housing. Please note that DIN housings are available.
TTG display with keypad (L5 option)
LCD display with keypad (L1 option)
Standard LCD display (L9 option)

82600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
Range & Span consideration
The 2600T Transmitter Specification Sheets provide all information concerning the Range and Span limits in relation to the model
and the sensor code.
The terminology currently used to define the various parameters is as follows:
• URL: Upper Range Limit of a specific sensor. The highest value of the measured value that the transmitter can be adjusted to
measure.
• LRL: Lower Range Limit of a specific sensor. The lowest value of the measured value that the transmitter can be adjusted to
measure.
• URV: Upper Range Value. The highest value of the measured value to which the transmitter is calibrated.
• LRV: Lower Range Value. The lowest value of the measured value to which the transmitter is calibrated.
• SPAN: The algebraic difference between the Upper and Lower Range Values. The minimum span (MIN SPAN) is the minimum value
that can be used without degradation of the specified performance. The calibration span (CAL SPAN) is the difference between
Upper Range Value (URV) and Lower Range Value (LRV).
• TD: (or Turn Down Ratio) is the ratio between the maximum span and the calibrated span.
The transmitter can be calibrated with any range between the LRL and the URL with the following limitations:
– LRL ≤LRV ≤(URL - CAL SPAN)
– CAL SPAN ≥MIN SPAN
– URV ≤URL

2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E 9
4 Opening the box
Identification
The instrument is identified by the data plates shown in Figure 3. The certification plate (ref. A): contains the certification related
parameters for use in Hazardous area.
The Nameplate (ref. B), always made of AISI 316 ss, provides information concerning the model code, maximum working pressure,
range and span limits, power supply, output signal, diaphragms material, fill fluid, range limit, serial number, maximum process
working pressure (PS) and temperature (TS).
The Tag plate, instead, provides customer tag number and calibrated range.
Both certification and tag plates are supplied self-adhesive attached to the electronics housing, as standard. Option I2 allows to
select these plates as metal AISI 316 ss fastened to the electronics housing with rivets.
The instrument may be used as a pressure accessory as defined by the Pressure Equipment Directive 2014/68/EU:
• category III module H for PS > 20 MPa, 200 bar
• art. 4, par. 3 Sound Engineering Practice (SEP) for PS < 20 MPa, 200 bar and for all PS values of 266xRx models.
In this case, near the CE mark, you will find the number of the notified body (0474) that has verified the compliance according to
module H.
266 pressure transmitters comply with directive EMC 2014/30/EU.
The certification plate (ref.A) shown here is issued by ABB S.p.A, 22016 Tremezzina, Italy, with the numbers:
• FM09ATEX0023X or IECEx FME 16.0002X (Ex db, Ex tb)
• FM09ATEX0024X or IECEx FME 16.0003X (Ex ia)
• FM09ATEX0025X or IECEx FME 16.0004X (Ex ic) (Ex nA)
CE-Identification number of the notified bodies to Pressure Equipment Directive: 0474, to ATEX certification: 0722, to IECEx
certification: IT/CES/QAR07.0001.
The certification plate may also be issued by
• ABB India Limited, 560058 Bangalore, India -
• ABB Engineering Limited, Shanghai 201319, P.R. China
• ABB Inc. Warminster PA 18974, USA
with the same certification numbers.

FM16CA0036X - FM16US0066X
A
B
C
2600T
Tag
Number
Calib.
Range
PRESSURE TRANSMITTER

10 2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
Optional wired-on SST plate (I1)
The 266 transmitter can be supplied with the optional “Wired
On Stainless Steel plate” (figure 4) which is permanently laser
printed with a custom text specified in phase of order. The
available space consists in 4 lines with 32 characters per line.
The plate will be connected to the transmitter with a Stainless
Steel wire.
Figure 4: 4-line layout of the optional wired-on Stainless Steel plate
Handling
The instrument does not require any special precautions during
handling although normal good practice should be observed.
Storage
The instrument does not require any special treatment if stored
as dispatched and within the specified ambient conditions.
There is no limit to the storage period, although the terms of
guarantee remain as agreed with the Company and as given in
the order acknowledgement.
5 Mounting
General
Study these installation instructions carefully before proceeding.
Failure to observe the warnings and instructions may cause a
malfunction or personal hazard. Before installing the
transmitter, check whether the device design meets the
requirements of the measuring point from a measurement
technology and safety point of view.
This applies in respect of the explosion protection certification,
measuring range, gauge pressure stability, temperature
(Ambient and Process), operating voltage.
The suitability of the materials must be checked as regards
their resistance to the media. This applies in respect of the:
• Gasket
• Process connection, isolating diaphragm, etc.
In addition, the relevant directives, regulations, standards, and
accident prevention regulations must be observed (e.g., VDE/
VDI 3512, DIN 19210, VBG, Elex V, etc.). Measurement accuracy is
largely dependent on correct installation of the pressure
transmitter and, if applicable, the associated measuring
pipe(s). As far as possible, the measuring setup should be free
from critical ambient conditions such as large variations in
temperature, vibrations, or shocks.
IMPORTANT
If unfavorable ambient conditions cannot be avoided for
reasons relating to building structure, measurement
technology, or other issues, the measurement quality may
be affected. If a remote seal with capillary tube is installed
on the transmitter, the additional operating instructions for
remote seals and the related data sheets must be observed.
IP protection & designation
The housings for 266 transmitters are certified as conforming
to protection type IP66 / IP67 (according tonIEC 60529) or
NEMA 4X (according to NEMA 250).
The first number indicates the type of protection the
integrated electronics have against the entry of foreign bodies,
including dust.
“6” means that housing is dust-proof (i.e., no ingress of dust).
The second number indicates the type of protection the
housing has against the entry of water.
“6” means that housing is protected against water; specifically,
powerful jets of water under standardized conditions.
“7” means that housing is protected against water; specifically,
against the effects of temporary immersion in water under
standardized water pressure and temporal conditions.
Mounting the transmitter
Transmitter factory configuration consideration
The 266 pressure transmitter in your hands has been factory
calibrated to reflect the published declared performance
specification; no further calibration is required in normal
condition.
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

11
2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
ABB typically configures 266 pressure transmitters according
to the user requirements. A typical configuration includes:
• TAG number
• Calibrated span
• Output linearization
• LCD display configuration
Hazardous area considerations
The transmitter must be installed in hazardous area only if it is
properly certified. The certification plate is permanently fixed
on the neck of the transmitter top housing. The 266 Pressure
Transmitter Line can have the following certifications:
INTRINSIC SAFETY Ex ia:
• ATEX Europe (code E1) approval
II 1 G Ex ia IIC T6...T4 Ga, II 1/2 G Ex ia IIC T6...T4 Ga/Gb,
II 1 D Ex ia IIIC T85 °C Da, II 1/2 D Ex ia IIIC T85 °C Da;
IP66, IP67.
• IECEx (code E8) approval
Ex ia IIC T6...T4 Ga/Gb, Ex ia IIIC T85 °C Da; IP66, IP67.
EXPLOSION PROOF:
• ATEX Europe (code E2) approval
II 1/2 G Ex db IIC T6 Ga/Gb Ta=–50 °C to +75 °C,
II 1/2 D Ex tb IIIC T85 °C Db Ta = –50 °C to +75 °C;
IP66, IP67.
• IECEx (code E9) approval
Ex db IIC T6 Ga/Gb Ta=–50 °C to +75 °C,
Ex tb IIIC T85 °C Db Ta = –50 °C to +75 °C; IP66, IP67.
FM Approvals US (code E6), FM Approvals Canada (code E4):
• Explosionproof (US): Class I, Division 1,
Groups A, B, C, D; T5
• Explosionproof (Canada): Class I, Division 1,
Groups B, C, D; T5
• Dust-ignitionproof: Class II, Division 1, Groups E, F, G;
Class III, Div. 1; T5
• Flameproof (US): Class I, Zone 1 AEx d IIC T4 Gb
• Flameproof (Canada): Class I, Zone 1 Ex d IIC T4 Gb
• Nonincendive: Class I, Division 2, Groups A, B, C, D T6...T4
• Energy limited (US): Class I, Zone 2 AEx nC IIC T6...T4
• Energy limited (Canada): Class I, Zone 2 Ex nC IIC T6...T4
• Intrinsically safe: Class I, II, III, Division 1,
Groups A, B, C, D, E, F, G T6...T4
Class I, Zone 0 AEx ia IIC T6...T4 (US)
Class I, Zone 0 Ex ia IIC T6...T4 (Canada)
Type 4X, IP66, IP67 for all above markings.
COMBINED FM Approvals US and Canada
• Intrinsically safe (code EA)
COMBINED ATEX, FM and IECEx Approvals (code EN)
Technical Regulations Customs Union EAC (Russia,
Kazakhstan, Belarus), Inmetro (Brazil), Kosha (Korea)
NEPSI China approvals:
• INTRINSIC SAFETY Ex ia (code EY):
Ex ia IIC T4/T5/T6 Ga, Ex ia IIC T4/T5/T6 Ga/Gb,
Ex iaD 20 T85/T100/T135, Ex iaD 20/21 T85/T100/T135.
• EXPLOSION PROOF (code EZ):
Ex d IIC T6 Gb, Ex tD A21 IP67 T85 °C.
• INTRINSIC SAFETY Ex ic (code ES):
Ex ic IIC T4~T6 Gc, Ex nA IIC T4~T6 Gc,
Ex tD A22 IP67 T85 °C.
IMPORTANT
REFER TO CERTIFICATES FOR AMBIENT TEMPERATURE
RANGES RELATED TO THE DIFFERENT TEMPERATURE
CLASSES.
HIGH STATIC VERSION IS NOT IN COMPLIANCE WITH ISA
12.27.01 FOR SEALING REQUIREMENTS, SPECIFICALLY FOR
FM APPROVAL (Canada).
WARNING
General Risk for model 266 used in zone 0.
The enclosure contains aluminum and is considered to
present a potential risk of ignition by impact or friction.
Care must be taken into account during installation and use
to prevent impact or friction. pening the housing cover.

12 2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
Pressure Equipment Directive (PED)
(2014/68/EU)
Devices with PS > 200 bar
Devices with a permissible pressure PS >200 bar have been
subject to a conformity validation. The data label includes the
following specifications:
Figure 5: 266 nameplate with PED data
Devices with PS ≤200 bar
Devices with a permissible pressure PS ≤200 bar correspond to
article 3 paragraph (3). They have not been subject to a
conformity validation. These instruments were designed and
manufactured acc. to SEP Sound Engineering Practices.
Mounting a DP sensor transmitter
The pressure transmitter models 266DSH, 266MST and 266RST
can be mounted directly on the manifold. A mounting bracket
for wall or pipe mounting (2” pipe) is also available as an
accessory. For models 266DRH, 266MRT and 266RRT always
mounting brackets should be used. Ideally, the pressure
transmitter should be mounted in a vertical position to prevent
subsequent zero shifts.
IMPORTANT
If the transmitter is installed inclined with respect to the
vertical, the filling liquid exerts hydrostatic pressure on the
measuring diaphragm, resulting in a zero shift. In such an
event, the zero point can be corrected via the zero push-
button or via the “set PV to zero” command. Please refer to
the following paragraph for further details. For transmitters
without diaphragm seals, please read the considerations on
the Vent/Drain.
During installation of the transmitter, zero shifts caused by
mounting (e.g., a slightly oblique mounting position due to a
remote seal, etc.) may occur; these must be corrected.
IMPORTANT
The transmitter must have reached its operating
temperature (approx. 5 min. after startup, if the transmitter
has already reached the ambient temperature).
This correction can be executed only if the Calibration
Lower Range value is 0.0 and must be made with process
(dp or p) = 0.
The correction consists in the Zero elevation/suppression
operation and can be done in two ways:
1 Locally by acting on the Z push button when the electronic
switch SW 3 is set to 0,
2 From remote station via FF communication writing 0.0 in the
PTRB_DESIRED_PRIMARY_VALUE
In case the Calibration Lower Range value is not 0.0 then the
correction cannot be made with the local Z push button, but it
can be done only from remote station via FF communication
writing the correct measure value in the PTRB_DESIRED_
PRIMARY_VALUE
IMPORTANT
After the above operations the Calibration Range Values are
not changed. The desired process output value is produced
through an internal calculation by applying an offset at the
measured value.
NOTICE
In case of a High Static differential pressure transmitter
(266DSH.x.H) please always open the equalization valve of
the manifold (if installed) before applying pressure to the
transmitter. High Static pressure can damage the sensor
causing a zero shift and a serious decrease of the total
performance in terms of accuracy. In this case, please
perform a full sensor trim.
It is important to mount the transmitter and to lay the process
piping so that gas bubbles, when measuring liquids, or
condensate when measuring gases, will flow back to the
process and not enter the transmitter measuring chamber.
Optional Vent/drain valves (code V1/V2/V3) on the transmitter
are located on the sensor flanges.
The transmitter has to be positioned so that these drain/vent
valves will be located higher than the taps on liquid service in
order to allow the venting of entrapped gas or below the taps
on gas service in order to allow the air to vent off or condensate
to drain off.

13
2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
For safety reasons, take care of the drain/vent valves position
so that when the process fluid is removed during the drain/
vent operation it is directed down and away from technicians. It
is recommended to mount the transmitter to prevent this
possible source of damage for unskilled operators.
Figure 6: Drain/vent valves configuration (respectively V1, V2, V3)
IMPORTANT
In case of a High Static differential pressure transmitter,
please notice that the Vent/Drain valves can be configured
only on the process axis (V1).

14 2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
Bracket mounting (optional)
Different mounting brackets are available please refer to the relevant installation drawing below:


89 (3.48)
142 (5.59)
(*)
179 (7.02)
91 (3.58)
116 (4.57)
29 (1.14)
18 (0.71)
18 (0.71)
210 (8.28)
11 (0.43)
113 (4.45)
72 (2.83)
66 (2.60) with plug
78 (3.07) with d/v valve
58 (2.28) 55 (2.17)
96.8 (3.81)
100 (3.94) for NACE bolting
179 (7.02)
91 (3.58)
145 (5.70)
54 (2.13)
78 (3.07) with d/v valve
29 (1.14)
18 (0.71)
18 (0.71)
210 (8.28)
58 (2.28) 55 (2.17)
66 (2.60) with plug
41.3 (1.63)
65 (2.53)
102 (4.02) 29 (1.12)
9 (0.35)

15
2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E


AIR/GAS measurements
142 (5.59)
(*)
179 (7.02)
91 (3.58)
123 (4.86)
113 (4.43)
29 (1.14)
18 (0.71)
18 (0.71)
210 (8.28)
113 (4.45)
11 (0.43)
72 (2.83)
66 (2.60) with plug
78 (3.07) with d/v valve
58 (2.28) 55 (2.17)
129 (5.06)
197 (7.73)
72 (2.83)
116 (4.57)
136 (5.35)
178 (6.99)
183 (7.19)
29 (1.14)
18 (0.71)
55 (2.17)
113 (4.45)
87 (3.42)
18 (0.71)

16 2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E



65 (2.54)
83 (3.28)
136 (5.35)
116 (4.57)
29 (1.14)
18 (0.71)
55 (2.17)
183 (7.19)
87 (3.42)
18 (0.71)
4.4 (0.17)
91 (3.58)
179 (7.02)
54 (2.13)
116 (4.57)
29 (1.14)
18 (0.71)
113 (4.45)
72 (2.83)
210 (8.28)
18 (0.71) 58 (2.28) 55 (2.17)
89 (3.48)
1/4 or 1/2 NPT

17
2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E

B2 Pipe and wall mounting bracket details
All the bolts and nuts supplied are necessary for the installation on pipe. In case of panel or wall installation, the U-bolt and the
U-bolt nuts and washers will not have to be used. The bolts for panel mounting are not within the scope of supply.

54 (2.13)
123 (4.86)
113 (4.43)
179 (7.02)
91 (3.58)
29 (1.14)
18 (0.71)
18 (0.71) 55 (2.17)
58 (2.28)
210 (8.28)
113 (4.45)
72 (2.83)
U-bolt
Transmitter fixing bolts
U-bolt fixing bolt and washer
B2 bracket

18 2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E

B5 Flat type bracket details

142 (5.59)
(*)
70 (2.75)
179 (7.02)
91 (3.58)
166 (6.53)
70 (2.75)
84 (3.31)
117 (4.60)
29 (1.14)
18 (0.71)
18 (0.71)
11 (0.43)
210 (8.28)
58 (2.28) 55 (2.17)
95 (3.72)
174 (6.86)
U-bolt
Transmitter fixing bolts
U-bolt fixing bolt and washer
B5 bracket

2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E 19
Mounting a P style pressure transmitter
The pressure transmitter can be mounted directly on the manifold. A mounting bracket for wall or pipe mounting (2” pipe) is also
available as an accessory. Ideally, the pressure transmitter should be mounted in a vertical position to prevent subsequent zero shifts.
IMPORTANT
If the transmitter is installed inclined with respect to the vertical, the filling liquid exerts hydrostatic pressure on the measuring
diaphragm, resulting in a zero shift. In such an event, the zero point can be corrected via the zero push-button or via the “set PV
to zero” command. Please refer to paragraph 5.5for further details. For transmitters without diaphragm seals the Vent / Drain
considerations below should be taken into account.




91 (3.58)
72 (2.83)
18 (0.71)
113 (4.45) 29 (1.14)
18 (0.71)
145 (5.71)
18 (0.71) 16 (0.63)
36 (1.42)
108 (4.25) 49 (1.93)
19 (0.75)
32 (1.26) width across
flats of exagon
18 (0.71)
113 (4.45) 29 (1.14)
18 (0.71)
145 (5.71)
91 (3.58)
18 (0.71) 16 (0.63)
108 (4.25)
72 (2.83)
39 (1.54)
49 (1.93)
54 (2.13)
1/2 - 14 NPT
32 (1.26) width across
flats of exagon

20 2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E


NOTICE
Potential damage to transmitter. In case of FOUNDATION Fieldbus gauge pressure transmitter with 1050 bar/15000 psi sensor
range (266HSH.Z or 266GSH.Z) and 1/4” NPT process connection, please always perform sensor low trimming to remove
possible zero shift and a prevent serious decrease of the total performance in terms of accuracy. Sensor low trim can be
performed from DD based FF Masters.


29 (1.14)
18 (0.71) 18 (0.71)
145 (5.71)
19 (0.74)
Ø65 (2.56)
91 (3.58)
12 (0.45)
105 (4.12)
116 (4.57)
72 (2.83)
283 (11.12)
113 (4.45)
23 (0.9) width across
flats of exagon
113 (4.45) 29 (1.14)
18 (0.71) 18 (0.71)
145 (5.71)
91 (3.58)
1/2 - 14 NPT
Ø65 (2.56)
51 (1.99) Max.
105 (4.12)
116 (4.57)
72 (2.83)
283 (11.12)
27 (1.06) width across
flats of exagon