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Intrinsically Safe
Pressure and Temperature
Transducers (PTX Series)
User’s Manual
This manual contains important information for the safe and
effective operation of the Swagelok® Intrinsically Safe Pressure
and Temperature Transducers, PTX series. Users must read and
understand its contents before operating the transducer.
2
Instrinsically Safe PTX User’s Manual
Contents
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Product Information . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Control Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Interface Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Safety
Safety Summary
R
ead the entire safety information section and User’s Manual before using this product. Failure to do so
can result in serious injury or death.
Signal Words and Safety Alert Symbols Used in this Manual
WARNINGStatements that indicate a hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTIONStatements that indicate a hazardous situation which, if not avoided, could result in minor or moderate
injury.
NOTICEStatements that indicate a hazardous situation which, if not avoided, could result in damage to the
equipment or other property.
Safety alert symbol indicating a potential personal injury hazard.
Safety alert symbol indictating a potential danger to life or of serious injuries due to catapulting parts.
Instriniscally Safe PTX User’s Manual
Safety Instructions
For proper and safe operation, Swagelok intrinsically safe PTX series transducers must be installed,
operated, and serviced according to applicable local regulations and these instructions. Otherwise,
serious personal injuries, damage or both can occur.
Except for adjusting the length of the wires, the electrical connection provided on the transducer must be
used as originally supplied and not bypassed. Only qualified persons should work on these instruments.
Do not exceed the overpressure rating.
Before servicing any installed pressure transducer you must
■ disconnect power
■ depressurize system
■ purge the transducer
Residual material may be left in the transducer and system.
Introduction
The Swagelok Intrinsically Safe Pressure and Temperature Transducer (PTX) is an industrial pressure and temperature
transducer for monitoring fluid pressure and temperature in automated fluid systems using a MEMS pressure-sensing
technology. The PTX provides two analog outputs to monitor fluid pressure and temperature in automated fluid systems.
Each PTX communicates directly with the Swagelok Intrinsically Safe Intelligent Control Module™ (ICM™) unit through one
of the analog input connection ports on the ICM. Each PTX can also interface with traditional automation equipment with
suitable analog inputs such as Programmable Logic Controller (PLC), Distributed Control System (DCS), or Supervisory
Control and Data Acquisition (SCADA) system.
The PTX is available with a 1.5 in. Swagelok Modular Platform Component (MPC) surface mount in accordance with
ANSI/ISA 76.00.02 or with 1/4 in. or 6 mm Swagelok tube fitting end connections. It is UL® and ATEX certified for use in
hazardous areas.
3
4
Instrinsically Safe PTX User’s Manual
Product Information
Network Connector
Plug
Power LED
Sensor LED
PTX Enclosure
Screw
(2, other is opposite
one shown)
Network Connector
Plug
Power LED
Sensor LED
PTX Enclosure
Screw
(2, other is opposite
one shown)
Mounting holes
Fig. 1 PTX with MPC Modular Surface Mount
Front View
Fig. 2 PTX with Swagelok Tube Fitting
End Connections
Instriniscally Safe PTX User’s Manual
Specifications
Voltage
Current
Operating (Ambient)
Media
Storage
Temperature
Measurement
Full-scale Range
Pressure Measurement
Overrange Pressure
Burst Pressure
Temperature
Pressure
Weight
Certifications
Ingress Protection
Electromagnetic
Compatibility
Vibration
Shock
Entity Parameters
Power
9 to 28 V (dc), 24 V (dc), nominal
< 20 mA (dc) at 24 V (dc)
Temperature (environment)
Minimum
23°F (–5°C)
Maximum
158°F (70°C)
Minimum
23°F (-5°C)
Maximum
158°F (70°C)
Minimum
-40°F (–40°C)
Maximum
158°F (70°C)
Temperature Measurement
Measurement Range
23 to 158°F (–5 to 70°C)
Accuracy, including:
Repeatability
± 9°F (± 5°C absolute accuracy)
Hysteresis
Nonlinearity
Pressure
0 to 50 psig (0 to 3.4 bar)
0 to 250 psig (0 to 17.2 bar)
0 to 500 psig (0 to 34.4 bar)
Accuracy, including:
Repeatability
± 2 % of full scale pressure of measurement
Hysteresis
Nonlinearity
2 × full scale
5 × full scale
Output Reading to Voltage Conversion
-40°F (-40°C) = 0.5 V (dc)
158°F (70°C) = 4.5 V (dc)
0 psig = 0.5 V (dc)
full scale = 4.5 V (dc)
Miscellaneous Data
with MPC process connections
0.83 lb (375 g)
with 1/4 in. and 6 mm Swagelok tube
1.27 lb (576 g)
fitting end connections
■ ANSI/NFPA Class I, Division 1, Groups A, B, C, D, Temperature Class T4
■ UL 913 - Edition 8, UL 60079-0 - Edition 6, UL 60079-11 - Edition 6
■ cUL® - CSA C22.2 NO. 157-92 - Edition 3
■ ATEX Standards: EN 60079-0, EN 60079-11, EN 60079-26
■ IEC: IEC 60079-0 - Edition 6, IEC 60079-11 - Edition 6,
IEC 60079-26 - Edition 2
IP64
EN 61326-1:2006
■ RF Emissions: EN 55011
■ ESD Immunity: EN 61000-4-2
■ RF Immunity: EN 61000-4-3
■ EFT Immunity: EN61000-4-4
■ Conducted Immunity: EN 61000-4-6
Tested to IEC 60068-2-6:2007
■ 10 to 150 Hz, at 2.04 g
■ 10 sweeps at 0.5 Octave/min
Tested to IEC 6068-2-27:1987
■ 50 g, 11 msec
■ 3 positive and 3 negative pulses each axis
See Control Drawing: PTX-V-0011-SCHEDULE
Note:Before installing the PTX in a hazardous location, review the control drawing on page 6.
This will help ensure all electrical connections to and from the PTX comply with safety requirements. For an
electronic copy of this manual, see www.swagelok.com.
5
Fig. 3 PTX-V-0011-SCHEDULE
A
B
C
D
4
3
DWG.
NO.
1
PTX-V-0011-SCHEDULE
2
4
𝑈𝑈𝑂𝑂 ×𝐼𝐼𝑂𝑂
.
≥
≥
≥
≤
≤
Associated Apparatus
Voc or Vt (or Uo)
Isc or It (or lo)
Po
Ca (or Co)
La (or Lo)
4
𝑉𝑉𝑂𝑂𝑂𝑂 ×𝐼𝐼𝑆𝑆𝑆𝑆
=
The PTX has been certified to the following standards:
UL 913 8th Edition
CSA C22.2 No. 157
IEC 60079-0:2011
IEC 60079-11:2012
IEC 60079-26:2009
EN 60079-0:2012+A11:2013
EN 60079-11:2012
EN 60079-26:2007
Certifications
No assembly of the PTX is required by the user.
Pressure Temperature Transducer Installation
Substitution of components may impair intrinsic safety.
Associated apparatus must not be used in combination unless permitted by associated apparatus
certification.
8
7
THIS PRINT IS THE EXCLUSIVE PROPERTY OF SWAGELOK COMPANY. IT MUST BE RETURNED ON
REQUEST ALONG WITH ANY DOCUMENTS CONTAINING INFORMATION OBTAINED FROM THIS
PRINT. NEITHER THIS PRINT NOR ANY PART OF IT NOR ANY INFORMATION CONCERNING IT MAY
BE COPIED, DISCLOSED TO OTHERS OR USED FOR ANY PURPOSE EXCEPT IN FURTHERANCE OF
YOUR BUSINESS WITH SWAGELOK. THE PARTS REFERRED TO ON THIS PRINT MAY BE THE
SUBJECT OF PATENTS AND/OR PENDING APPLICATIONS AND MAY NOT BE MANUFACTURED
WITHOUT PERMISSION FROM SWAGELOK COMPANY.
6
.031
.015
1 DEGREE
5
-- DIMENSIONS ARE INCHES NEXT TO [MILLIMETERS].
.XX
.XXX
ANGLES
TOLERANCE ON ENGLISH DIMENSIONS
UNLESS OTHERWISE SPECIFIED
TITLE
4
© Swagelok Company All Rights Reserved
3
MM
CHECK/APR BY
MJR
DRAWN BY
APPROVAL/SCHEDULE DRAWING
Jul-31-14
DATE
Jul-31-14
DATE
1
SCALE
1 of 2
SHEET
NONE
DW G.
PTX-V-0011-SCHEDULE REV. NO
.
2
SPECIFICATION: WARNING: ANY CHANGES MADE TO THIS DOCUMENT MUST BE REVIEWED AND APPROVED BY SWAGELOK'S COMPLIANCE DEPARTMENT
SWAGELOK PRESSURE TEMPERATURE TRANSDUCER CONTROL DRAWING
The ambient operating (Tamb) range for this product is -5C to 70C. Use outside of this range will negate
intrinsic safety.
Pressure Temperature Transducer Ratings
If Po of the associated apparatus is not known, it may be calculated using this formula: 𝑃𝑃𝑂𝑂 =
I.S. Equipment
Vmax (or Ui)
Imax (or Ii)
Pmax (or Pi)
Ci + Ccable
Li + Lcable
Table 1 Entity Parameters:
Where the cable capacitance per foot are not known, the following values shall be used: Ccable= 60 pF/ ft.,
Lcable = 0.2 μH/ft.
Similarly, the inductance of the field wiring from the intrinsically safe equipment to the associated
apparatus shall be calculated and must be included in the system calculations as shown below in Table 1.
Cable inductance Lcable plus the intrinsically safe equipment inductance, Li, must be less than the marked
inductance La (or Lo).
Capacitance of the field wiring from the intrinsically safe equipment to the associated apparatus shall be
calculated and must be included in the system calculations as shown in Table 1. Cable capacitance, Ccable,
plus intrinsically safe equipment capacitance, Ci, must be less than the marked capacitance Ca (or Co).
When required by the manufacturer's control drawing, the associated apparatus must be connected to a
suitable ground electrode per the National Electrical Code (ANSI/NFPA 70), the Canadian Electrical Code,
or other local installation codes, as applicable. The resistance of the ground path must be less than 1
ohm.
Associated apparatus must be installed in accordance with its manufacturer's control drawing and Article
504 of the National Electrical Code (ANSI/NFPA 70), the Canadian Electrical Code, or other local
installation codes, as applicable.
5
Associated Apparatus
6
The Entity Concept allows interconnection of intrinsically safe apparatus with associated apparatus not
specifically examined in combination as a system when the approved values of open circuit voltage (Voc)
and short circuit current (Isc) of the associated apparatus are less than or equal to the maximum voltage
(Vmax) and current (Imax) of the intrinsically safe apparatus and the approved values of Ca and La of the
associated apparatus are greater than the acceptable capacitance (Ci+Ccable) and inductance (Li+Lcable)
respectively for the intrinsically safe apparatus.
7
Entity Parameters
DCN-00004165
DESCRIPTION:
-
8
DCN
REVISIONS
REV.
A
B
C
D
6
Instrinsically Safe PTX User’s Manual
Control Drawing
Fig. 3 PTX-V-0011-SCHEDULE continued
A
B
C
D
DCN-00004165
DCN
8
7
Transducer
Connector
1
2
3
4
6
7
8
9
Pin
3
9
8
28 V
Vmax
1A
Imax
6
0
Ci
0
Li
5
Any associated
apparatus power
supply with Entity
Concept Parameters
appropriate for
connection to an IS
device with Entity
concept parameters
listed in Table 1.
(2)
Any IS or
Associated
Apparatus
communication
controller with Entity
Concept parameters
(Vmax, Imax, Ci, Li)
appropriate for
connection to IS
devices with Entity
Concept parameters
listed in Table 1.
(1)
Installation Diagram
4
Non-Hazardous Location
Power(2)
Communications
Controller/
Barrier (1)
3
DWG.
NO.
8
7
THIS PRINT IS THE EXCLUSIVE PROPERTY OF SWAGELOK COMPANY. IT MUST BE RETURNED ON
REQUEST ALONG WITH ANY DOCUMENTS CONTAINING INFORMATION OBTAINED FROM THIS
PRINT. NEITHER THIS PRINT NOR ANY PART OF IT NOR ANY INFORMATION CONCERNING IT MAY
BE COPIED, DISCLOSED TO OTHERS OR USED FOR ANY PURPOSE EXCEPT IN FURTHERANCE OF
YOUR BUSINESS WITH SWAGELOK. THE PARTS REFERRED TO ON THIS PRINT MAY BE THE
SUBJECT OF PATENTS AND/OR PENDING APPLICATIONS AND MAY NOT BE MANUFACTURED
WITHOUT PERMISSION FROM SWAGELOK COMPANY.
6
.031
.015
1 DEGREE
5
-- DIMENSIONS ARE INCHES NEXT TO [MILLIMETERS].
.XX
.XXX
ANGLES
TOLERANCE ON ENGLISH DIMENSIONS
UNLESS OTHERWISE SPECIFIED
TITLE
4
© Swagelok Company All Rights Reserved
3
MM
CHECK/APR BY
MJR
DRAWN BY
APPROVAL/SCHEDULE DRAWING
Jul-31-14
DATE
Jul-31-14
DATE
1
SCALE
2 of 2
SHEET
Hazardous Location
NONE
DW G.
PTX-V-0011-SCHEDULE REV. NO
.
2
1
PTX-V-0011-SCHEDULE
2
SPECIFICATION: WARNING: ANY CHANGES MADE TO THIS DOCUMENT MUST BE REVIEWED AND APPROVED BY SWAGELOK'S COMPLIANCE DEPARTMENT
SWAGELOK PRESSURE TEMPERATURE TRANSDUCER CONTROL DRAWING
GND
Pressure
Power
Temperature
5
Signal
Power
Signal (Temperature)
Signal (Pressure)
Field Wiring Diagrams
All
Model
Table 2: Entity Parameters by Pin
DESCRIPTION:
-
REV.
REVISIONS
A
B
C
D
Instriniscally Safe PTX User’s Manual
7
8
Instrinsically Safe PTX User’s Manual
Installation
Mounting
A PTX with 1/4 in. or 6 mm Swagelok tube fitting process end connections should be installed in the system according to
Swagelok Tube Fitting Instructions for 1 in. (25 mm) and smaller fittings, MS-12-01. Mounting holes are provided on the
bottom of the PTX body. See below for dimension information.
A PTX with a 1.5 in. Swagelok MPC modular surface mount should be installed in the system according to the surface
mount assembly instructions in the MPC Series Modular Platform Components Assembly and Service Instructions,
MS‑12‑39.
Dimensions, in inches (millimeters), are for reference only and subject to change.
NOTICE Removal of the PTX enclosure screws will void the product warranty, damage the Ingress
Protection rating, and negate the intrinsically safe hazardous location rating of the PTX.
Analog input
connector (male DB9)
Analog input
connector (male DB9)
PTX Enclosure
Screw
(2, other is opposite
one shown, also on
MPC modular surface
mount product)
1.49
(37.8)
Top
5.27
5.85
(134)
(149)
Top
1.625 (41.3) dia
0.59
(15.0)
Four
mounting
holes,
0.21 (5.3)
dia
Four tapped
mounting holes,
#10-32 UNF-2C
Hole depth:
0.25 (6.4) min
0.43 (10.9) max
2× 46°
44°
1.50
(38.2)
1.50
(38.2)
0.25
(0.64)
Front
Bottom
MPC Modular Surface Mount
2.54
(64.5)
Bottom
Front
Swagelok Tube Fitting End Connections
Fig. 4 Product Dimensions
Instriniscally Safe PTX User’s Manual
Power Supply
The instrinsically safe PTX can be used with any power supply capable of providing between 9 and 28 V (dc) and 50 mA per
PTX in use. Supplying less than 9 V (dc) to the transducer will result in inaccurate measurements.
NOTICE Supplying more than 28 V (dc) can result in damage to the transducer.
Hazardous Location Power Supply
When used in hazardous locations, a properly rated power supply must be used. The intrinsically safe PTX can be powered
by any power supply identified as an intrinsically safe associated apparatus with output parameters of Voc ≤ 28 V (dc) and
Isc ≤ 1 A.
WARNING
A voltage higher than 28 V (dc) is outside the product’s safety rating. Using a voltage outside the safety
rating could result in an explosion.
Interface Cable
Cable Length
In non-hazardous locations, cable length is limited by the voltage drop for the power supply and the added noise on the
pressure and temperature signal lines. It is recommended that transducer cables not exceed 100 ft (30.4 m) in length in
order to minimize these effects.
Hazardous Location Cable Length
The wire length between intrinsically safe equipment and associated apparatuses is determined by the interaction of the
device entity parameters, as described in the following table. The parameter symbols and subscripts are defined in ATEX
standards EN 60079-0 and EN 60079-11.
Parameter
Intrinsically Safe
Equipment
Must Be
Associated Apparatus
(ex. power source)
Voltage
Vmax (or Ui)
≥
Voc (or Vt or Uo)
Current
Imax (or Ii)
≥
Isc (or It or lo)
Power
Pmax (or Pi)
≥
Po
Capacitance
Ci + Ccable
≤
Ca (or Co)
Inductance
Li + Lcable
≤
La (or Lo)
The cable between the two devices has a capacitance and inductance that must be added to that of the intrinsically safe
equipment parameter. Once the entity parameters of the devices are known the maximum cable length can be calculated.
Where available, the manufacturer’s specification for the cable’s capacitance and inductance can be used. When the cable
capacitance and inductance per foot are not known the following values must be used:
• Ccable= 60 pF/ft
• Lcable = 0.2 μH/ft
The ATEX standards define additional safety factor rules that can apply when determining the maximum cable length.
These do not apply in this case because the PTX has a capacitance (Ci) and inductance (Li) of zero.
9
10
Instrinsically Safe PTX User’s Manual
Example
Here is an example of using these parameters to determine the cable length.
1. Construct the entity parameter table for the known values:
Intrinsically Safe Equipment
(Swagelok PTX)
Associated Apparatus
(Power Supply)
Vmax
28 V
≥
9.5 V
Voc
Imax
1A
≥
1A
Isc
Pmax
-
≥
-
Po
Ci + Ccable
0 µF + Ccable
≤
0.5 μF
Ca
Li + Lcable
0 µH + Lcable
≤
8 μH
La
The entity parameters Pmax and Po can be ignored if the voltage and current parameters are compatible.
2. Calculate the maximum allowable cable capacitance and inductance.
Ccable,max = 0.5 µF − 0 µF = 0.5 µF
Lcable,max = 8 µH − 0 H=8 µH
3. Calculate the maximum cable lengths using the maximum allowable capacitance and inductance.
Length related to maximum capacitance = Ccable,max / Ccable/length =0.5 µF / 60 pF/ft = 8 333 ft (2 539 m)
Length related to maximum inductance = Lcable,max / Lcable/length = 8 µH / 0.2 µH/ft = 40 ft (12.1 m)
The entity parameters will vary from one piece of apparatus to the next so the calculation must be done for each piece of
apparatus in use.
Cable Bend Radius
The cable bend radius will vary according to the cable manufacturer’s recommendations. A bend radius of 6 to 10 times the
diameter of the cable is typical.
Wiring Diagram
The cables for the intrinsically safe PTX should be wired in accordance with Article 504 of the National Electrical Code
(ANSI/NFPA 70). The connector for the PTX is a standard male DB-9. The cable will be a socket DB-9 with the pinout as
described below.
1
GND
2
7
3
Temperature Output
6
8
4
5
9
Fig. 5 Wiring Diagram
Power Input
Pressure Output
Instriniscally Safe PTX User’s Manual
It is recommended the parameter measurement wires have their own connection to ground. A cable with three shielded,
twisted pair is optimal to achieve this, as shown in Figure 6. This will ensure that the voltage drop which occurs with the
flow of the operating current across the cable does not distort the temperature and pressure measurements.
V+
Pin 3
V-
Pin 2
Pressure +
Pin 8
Pressure -
Pin 6
Temperature +
Pin 9
Temperature -
Pin 7
Fig. 6 Parameter Measurement Wire
Setup
1. Install the PTX into your system, see Mounting.
2. Connect the interface cable to the PTX and the network device.
11
Maintenance
Additional assembly hardware for the MPC surface mount is available. Refer to Modular Platform Components (MPC),
MS‑02-185, for ordering information.
There are no field-maintainable parts within the intrinsically safe PTX. Contact your authorized Swagelok representative for
assistance.
NOTICE Removal of the PTX enclosure screws will void the product warranty, damage the Ingress
Protection rating, and negate the intrinsically safe hazardous location rating of the PTX.
Troubleshooting
Problem
Possible Cause
Remedy
Power LED
Off
No power applied to the device.
Connect power.
Green
Normal operation.
No action needed.
Sensor LED
If the Power LED is also OFF, indicates no power
applied to the device.
Connect power.
If the Power LED is on, indicates sensor element
failure.
Replace PTX unit.
Normal operation.
No action needed.
Off
Green
General
Output signal
unchanged after
change in pressure
Mechanical overload through overpressure
Replace PTX unit.
Signal value too
small
Diaphragm is damaged, e.g. through impact.
Replace PTX unit.
Signal value
dropping off / too
smalll
Abrasive/aggressive media; corrosion of diaphragm/
pressure connector; transmission fluid missing
Replace PTX unit.
Electromagnetic interference source in the vicinity
Shield the transducer and the cables. Remove the
interference source.
Working temperature too high / too low
Ensure temperatures within range of the transducer
(see Specifications).
Working temperature too high / too low
Ensure temperatures within range of the transducer
(see Specifications).
Cable break
Check connections and cable.
Incorrect wiring or supply voltage
Check wiring and supply voltage.
Signal value erratic
Signal value
incorrect
No output signal
Contact your authorized Swagelok representative for additional assistance.
Warranty Information
Swagelok products are backed by The Swagelok Limited
Lifetime Warranty. For a copy, visit swagelok.com or contact
your authorized Swagelok representative.
Each product catalog and user manual
is up to date at the time of printing;
subsequent revisions to individual product
catalogs and user manuals will be posted
to www.swagelok.com and will supersede
the printed version.
Swagelok, ICM—TM Swagelok Company
UL, cUL—TM UL LLC
© 2015 Swagelok Company
Printed in U.S.A.
January 2015, R0
MS-13-229