Dynisco PT303 User manual

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PT303 Strain Gage Pressure Transmier
Operang Manual
Explosion proof pressure transmier with integrated amplier for
use in hazardous environmeents

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Table of Contents
Content Page Icon
General
Notes on safety
Technical data
Funcon
Transport/delivery
Assembly
Commissioning
Maintenance
Troubleshoong
3
5
6
11
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14
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1. General
1.1 Important informaon
1.2 Copyright
1.3 Explanaon of icons
1.4 Abbreviaons
1.5 Correct use
1.6 User’s obligaons
1.1 Important information
This manual applies to the PT303 only. It must be kept near the equipment in a
readily and immediately accessible locaon at all mes.
The content of this manual must be read, understood and followed in all points by all
relevant people. This applies in parcular to the notes on safety. Following the safety
instrucons will help to prevent accidents, defects and malfuncons.
DYNISCO will not be held liable for any injury, loss or damage resulng from failure to
follow the instrucons in this manual.
If malfuncons occur in spite of having followed the operang instrucons, please
contact the DYNISCO customer service department (see chapter 8,
Maintenance).
This applies in parcular during the warranty period.
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1.2 Copyright
Copyright law requires that this manual be used for inhouse purposes only.
All reproducon, even parally and for in-house purposes, requires the approval of
DYNISCO. This manual may not be forwarded to third pares.
1.3 Explanation of icons
The manual uses icons to indicate informaon pertaining to safety:
Risk of destrucon or damage to equipment, machines or installaons
General danger to life or limb
Specic danger to life or limb
You MUST do this
The safety instrucons are provided again in the individual chapters of the manual.
1.4 Abbreviations
The following abbreviaons are used:
OM Operang manual
PT pressure transmier
f.s. of full scale

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1.5 Correct use
The PT303 is designed for measuring pressure in explosive atmospheres (Class I,
Division 1, Groups A, B, C & D) as part of a larger overall system. It contains an
integrated signal amplier. The PT303 pressure transmier can be used in media
temperatures up to 170°F. If the pressure transmier is used in other applicaons, the
safety and accident prevenon regulaons specic to that applicaon must be
followed.
1.6 User’s obligations
The operator or owner of the larger overall system, e.g. a machine, is responsible for
following the safety and accident prevenon regulaons that apply to the specic
applicaon.
2. Notes on safety
The operator or owner of the larger overall system is responsible for
following the safety and accident prevenon regulaons that apply
to the specic applicaon.
Mounng and electrical connecon of the PT must be done by specialists
with EMC training, following all applicable regulaons, and in
pressureless, voltage-free condion with the machine switched o.
The machine must be secured against being switched back on! Ambient
temperature for the electronics housing max. +170°F.
Higher temperatures can result in damage and malfuncon. Do not install
the pressure transmier in places where this temperature is exceeded.

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Explosion hazard!
Deviaon of the supply voltage from the value given in the technical specicaons, or
false polarity, can damage the pressure transmier and cause malfuncons that can
pose a risk of explosion. Operate with a power supply with the following
specicaons when employing the pressure 0 - 5 Vdcoutput:
Do not lay connecng cables in the direct vicinity of cables carrying higher voltage or
used to switch inducve or capacive loads.
3. Technical Data
3.1 Ordering guide
3.1.1 Ordering guide for PT303
3.2 Ordering example
3.3 Safety related specicaons
3.4 Performance characteriscs
3.4.1 Accuracy
3.5 Wiring/Electrical Terminaon
3.6 Pressure ranges
3.6.1 Max. Overload
3.6.2 Natural frequency
3.7 Electrical Data
3.8 Weight
3.9 Dimensions
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3.1 Ordering guide
The exact meanings of the leer/digit combinaons are given in the corresponding
secons of chapter 3.

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3.1.1 Ordering guide for pt303
3.2 Example for Ordering
3.3 Safety Related Specifications
3.4 Performance Characteristics
3.4.1 Accuracy
FM approvals Class I, Division 1 Groups A, B, C & D
PT303-X
±0.25% of full scale (Including Linearity, hysterisis and repeatability)

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3.5 Wiring/Electrical Termination
The electrical terminaon of the PT303 is 72” of four conductor sheilded cable, #22
AWG conductors, with 1/2-14 NPT conduit ng.
Color Funcon
Red Signal +
Black Signal -
White Excitaon +
Green Excitaon -
Fig. 3-1 Typical Wiring Diagram

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3.6 Pressure Ranges
(A) PT303-15 0-15
(A) PT303-30 0-30
(A) PT303-50 0-50
(A) PT303-75 0-75
(A) PT303-1C 0-100
(A) PT303-1.1C 0-110
(A) PT303-1.75C 0-175
(A) PT303-2C 0-200
(A) PT303-2.5C 0-250
(A) PT303-3C 0-300
(A) PT303-4C 0-400
(A) PT303-5C 0-500
(A) PT303-7.5C 0 - 750
(A) PT303-1M 0-1,000
(A) PT303-1.5M 0-1,500
(A) PT303-2M 0-2,000
(A) PT303-2.5M 0-2,500
(A) PT303-3M 0-3,000
(A) PT303-5M 0-5,000
(A) PT303-7.5M 0-7,500
(A) PT303-10M 0-10,000
3.6.1 Max Overload (Without influencing Operation Data)
3.6.2 Frequency Response
3.7 Electrical Data
3.8 Weight
PT303 2x rated pressure
> 2000 Hz
-3.5 pounds
Conguraon 4-arm Wheatstone bridge strain gauge with int. amplier
Output signal 4-wire 0 -5 Vdc
Supply voltage +/- 12 Vdc for FM approved explosion proof models

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3.9 Dimensions
Fig. 3-2 PT303 Mechanical Drawing

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4. Function
4.1 Construcon
4.2 Descripon of funcons
4.1 Construction
The PT303 are General Electric standards.
The main advantages are:
• thermal stability
• resistance to aggressive media
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4.2 Description of Functions
Through a closed, direct contact measurement system, the PT furnishes an electrical
signal that is proporonal to the pressure of the media. The pressure is applied by the
medium on the measuring diaphragm. The deecon of the measuring diaphragm
changes the resistance of the strain gauge bonded to the measuring diaphragm. The
strain gauge is a Wheatstone bridge. Depending on the model, the integrated
amplier generates an electrical signal (Vdc) proporonal to the pressure.
5. Transport / delivery
5.1 Transport / packing /
transport damage
5.2 Storage
5.3 Scope of delivery
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12
12
ESD sensive component. Electrostac discharge may damage the PT.
Take ESD precauons.

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5.1 Transport/packing/transport damage
- Do not let the PT be damaged by other items during transit.
- Use only the original packaging.
- Report transport damage to DYNISCO immediately in wring.
5.2 Storage
- Store the PT in original packaging only.
- Protect against dust and moisture.
5.3 Scope of delivery
- Pressure Transmier
- Calibratoin Sheet
- Operang manual with declaraon of conformity
6. Assembly
6.1 Mounng the Pressure Transmier
6.2 Electrical connecon
6.3 Connecon assignments
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Ambient temperature for the electronics housing max. +170°F.
Higher temperatures can result in damage and malfuncon.
Do not install the pressure transmier in places where this temperature
is exceeded.

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6.1 Mounting the Pressure Transmitter
6.2 Electrical Connection
Mounng and electrical connecon of the PT must be done by specialists
with EMC training, following all applicable regulaons, and in
pressureless, voltage-free, intrinsically safe condion with the machine
switched o.
The machine must be secured against being switched back on!
ESD sensive component. Electrostac discharge may damage the PT.
Take ESD
precauons.
Before mounng the PT, check the process connecon carefully.
Before mounng the PT, ensure that the process connecon is free from
media.
To prevent the PT from scking permanently in the process connecon,
coat the thread
secon of the transmier with high temperature resistant grease or a
suitable parng
agent.
Always use a torque wrench when screwing the PT in and out. Do not
apply the tool to
the housing or housing / electrical connecon!
• Screw the PT into the process connecon and ghten.
Mounng and electrical connecon of the PT must be done by specialists
with EMC training, following all applicable regulaons, and in
pressureless, voltage-free, condion with the machine switched o.
The machine must be secured against being switched back on!

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Do not lay connecng cables in the direct vicinity of cables carrying higher
voltage or used to switch inducve or capacive loads.
ESD sensive component. Electrostac discharge may damage the PT. Take
ESD precauons.
6.3 Connection Assignments
7. Commissioning
7.1 Supply Voltage
Conduit / Leads
Red Signal +
Black Signal -
White Excitaon +
Green Excitaon -
7.1 Supply voltage
7.2 Calibraon
7.3 Zero adjustment
7.4 Operaon
Please read the enre manual prior to installaon and use. Maximum excitaon is 28
Vdc. Rated excitaon is +/- 12 Vdc. Recommended warmup is 15 minutes.
Explosion hazard!
Deviaon of the supply voltage from the value given in the technical specicaons, or
false polarity, candamage the pressure transmier and cause malfuncons that can
pose a risk of explosion.
14
15
15
15

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7.2 Calibration
7.3 Zero Adjustment
7.4 Operation
Calibrate in pressureless state and at room temperature. Other ambient
temperatures will corrupt the signal. Use an adjustment screwdriver!
The adjustment is made at two potenometer screws in the cover secon of the elec-
tronic housing.
• Remove the cap screws from the potenometers.
• Connect a meter or suitable instrument to the signal output to verify the sengs.
• Adjust zero at potenometer adjusng zero screw and verify on meter.
For PT303, adjust zero at operang temperature!
• Wait unl a steady operang temperature is reached at the pressure sensor.
• Adjust zero at potenometer adjusng zero screw and verify on the meter.
• Replace the cover screws on the potenometers.
Operang temperature at the PT diaphragm max. 170°F.
Higher temperatures will damage the PT.
Ambient temperature for the electronics housing max. 170°F.
Higher temperatures can result in damage and malfuncon.
Do not install the pressure transmier in places where this temperature is
exceeded.

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8. Maintenance
8.1 Maintenance
8.1 Maintenance
8.2 Repair/disposal
8.3 Warranty
Mounng and electrical connecon of the PT must be done by specialists
with EMC training, following all applicable regulaons, and in
pressureless, voltage-free condion with the machine switched o.
The machine must be secured against being switched back on!
Burn hazard!
The PT can be very hot when removed.
Wear protecve gloves!
ESD sensive component. Electrostac discharge may damage the PT.
Take ESD precauons.
Always remove the PT before cleaning the machine with abrasives or steel
wire brushes or suchlike.
Removing the transmier if the medium is in solidied condion can
damage the diaphragm of the PT.
Do not clean the screw-in secon of the PT with hard objects. This will
damage the PT!
Always use a torque wrench applied to the designated hexagon collar
when screwing the PT in and out. Do not apply the tool to the housing or
housing/electrical connecon!
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• Remove the PT.
• Carefully clean the PT/process connecon of the transmier with a so cloth, while
the medium is sll malleable.
8.2 Repair/Disposal
Please send defecve PTs to your DYNISCO representave.
For addresses, see the back cover of the operang manual.
8.3 Warranty
This DYNISCO product is warranted under terms and condions set forth in the
DYNISCO web pages. Go to www.dynisco.com and click “warranty” at the boom of
any page for complete details.
9. Troubleshooting

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DyniscoLLC
38 Forge Parkway
Franklin, MA 02038
USA
Tel: [phone]
Fax: [phone]
Email: Inf[email protected]
Dynisco Extrusion
1291 19th St Ln NW
Hickory, NC 28601
Tel: [phone]
Fax: [phone]
Email: Inf[email protected]
Dynisco Polymer Test
Westgate II
730 Hemlock Road
Morgantown, PA 19543
Sales & Service:
Tel: [phone]
Fax: [phone]
Email: Inf[email protected]
Dynisco Europe GmbH
Wannenäckerstraße 24
74078 Heilbronn
Deutschland
Tel: [phone]
Fax:[phone]
Email: [e-mail]
Dynisco Instruments S.a.r.l.
466, rue du Marché Rollay
94500 Champigny sur Marne
France
Tel: [phone]
Fax: [phone]
Email: DyniscoFr[email protected]
Dynisco.s.r.l.
Via Adriaco, 2/2
20162 Milano
Italia
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Dynisco UK Ltd.
Silver Birches Business Park
Aston Road, Bromsgrove
Worcestershire B60 3EU
Great Britain
Tel: [phone]
Fax: [phone]
Email: [email protected]
Dynisco SPOL, S.R.O.
cp. 579
756 55 Dolni Becva
Czech Republic
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Dynisco B.V.
Muziekplein 67
PO Box 666
NL-5400 AR Uden
The Netherlands
Tel: [phone]
Fax: [phone]
Email: [e-mail]