Setra Systems 550 User manual

Installation Guide

MODEL 550

Low Range Pressure Measuring Transducers

560550-0092

Rev A

1-800-257-3872 TOLL FREE

1-978-264-0292 FAX

www.Setra.com Web Site

Setra offers a complete line of

products for these industries:

Industrial

HVAC

Test & Measurement

Barometric

Ultra High Purity / Sanitary

Please Note: Ranges above 7 psi are designed and manufactured in accordance with sound

engineering practice as defined by the Pressure Equipment Directive 97/23/EC and must not be used as

a “safety accessory” as defined by the Pressure Equipment Directive, Article 1, Paragraph 2.1.3.

Ranges below 7 psi are exempt from the Pressure Equipment Directive. The CE Mark on the unit does

not relate to the Pressure Equipment Directive.

INTRODUCTION

Series 550 are low range fluid pressure measuring transducers in which a ceramic capacitive sensor is

used to convert fluid pressures into a proportional electrical signal. These instruments are suitable for

long, continuous arduous service when operated within the published specifications.

Series 550 conform with the essential protection requirements of the EMC Directive 89/336/EEC

amended by certified type testing to EN 50082-2 and EN 60081-1.

Conformity with the requirements of the CE mark only applies when the installation

conditions described in these instructions have been met. For units supplied without

a cable assembly connection to the transducer must be accomplished using Setra

Systems approved cable. see APPROVED CABLE section.

All instruments conform to the appropriate specifications and/or drawings applicable and have been

subjected to relevant strict quality control procedures.

HAZARDOUS PRODUCTS

The Consumer Protection Act of 1987, Section 6 of the Heath and Safety at Work Act 1974 and the

Control of Substances Hazardous to Health Regulations 1988 require that we advise recipients and

users of our products of any potential hazards associated with their storage. Handling or use.

The products which our Company supplies may be classified as Electrical, Electro-Mechanical and

Electronic equipment.

These products are tested and supplied in accordance with our published specifications or individual

special requirements that are agreed in writing at time of order. They are constructed so as not to affect

adversely the safety of persons and property when properly installed, maintained and used by qualified

personnel, in the applications for which they were designed and manufactured

ACTION ON RECEIPT

*Check details on Calibration Certificate agree with data etched on transducer body.

*Check accessories supplied include:

Calibration Certificate (or QA Certificate)

Seal, Dowty Bonded (where applicable)

Mating Connector (where applicable)

GENERAL

*Transducer should not be subjected to greater than the maximum allowable pressure or

temperature as defined in the transducer specification.

*Transducer should not be subjected to mechanical impact.

*In the event of fire the end user must ensure that the system pressure is vented to a safe

area.

*The effects of decomposition of unstable fluids should be considered by the user when

placing this device in service.

*The pressure transducer has no means of draining or venting, this must be performed by

another component in the end users system.

*Pressure range must be compatible with the maximum pressure being measured.

*Pressure media must be compatible with the transducer wetted parts which are stainless steel to

UNS 31803, Ceramic and Nitrile

*Exposed end of cable must be kept free from moisture.

*Liquid must not be allowed to freeze in the pressure port.

MECHANICAL INSTALLATION

Pressure Connections:

1) G¼ internal pressure connection to BS2779. Alternative fitted as specified at time of

order.

2) KF25 Flange

Pressure couplings screwed into G¼ pressure ports should have a maximum thread engagement of 0.5”

(13mm) and UNDER NO CIRCUMSTANCES be allowed to touch the pressure sensitive

diaphragm. Pressure couplings should be sealed against the outer face at the pressure port entry using

bonded seal washer such as:-

Part Number Description Dowty Ref

GA29 G¼ bonded seal up to +212°F (+100°C) operation 400-021-4490-02

GA30 G¼ bonded seal up to +392°F (+200°C) operation 300-021-0967-02

GA31 G1/8 bonded seal up to +392°F (+200°C) operation 300-020-0967-02

Refer to Dowty for external pressure ratings.

Mounting: Pressure Transducer is designed to be attached by the coupling thread. Alternatively units

fitted with an immersible cable can be suspended via the cable or flange. Omni-directional. To fit, use a

5/8 UNF AF (M16) wrench on the hexagon provided and apply maximum torque of 20 lbf-ft (27 Nm).

The Customer must ensure that the pressure seal is suitable for the application. If in doubt contact Setra

Systems.

Effects of Heat: Avoid mounting the transducer near a source of heat which is liable to create a

temperature gradient across the instrument. If this is unavoidable, use a heat shield to deflect uneven

radiated heat or wrap the transducer in glass fibre insulation so that an even temperature is assumed

throughout.

ELECTRICAL INSTALLATION

All types include suppression devices providing transient protection to EN 61000-4-2 and EN 61000-

4-4.

For all types conformity with the requirements of the CE mark only applies when

connection is made with Setra Systems approved cable, See APPROVED CABLE

section, and the screen of that cable is connected to a reliable grounding point at the

instrumentation end.

APPROVED CABLES

Setra Systems uses cable comprising 7 color-coded wires, with a central vent tube, enclosed by an

aluminium/polyester shield where the shield is in contact with a separate drain wire. The outer sheath

material is Polyurethane (immersible, 122°F (+50°C)). Alternative outer sheath materials available on

request for harsh environments.

OPERATION

Having installed the transducer as instructed it is ready for use. The transducer should not be removed

while the system is at pressure. Before applying power, check that the correct polarity and excitation

levels are being applied. See ELECTRICAL REQUIREMENTS.

Cable Version: -4°F to +122°F (-20°C to +50°C)

Connector Version: -13°F to +185°F (-25°C to +85°C)

Process Media: -40°F to +212°F (-40°C to +100°C)

OPERATIONAL LIFE:

Limited to 10 million full scale cycles.

CALIBRATION

Transducers are calibrated to the range requested at time of order. Gauge datum vented to atmosphere

via the electrical connection

ADJUSTMENT OF ZERO AND SPAN CONTROLS

Switch and potentiometers provide continuous adjustment over the range 110% to 32% of nominal

pressure range. (See Table below)

Zero and span controls are precisely set during manufacture and should only read adjustment if there is a

change in the required pressure measurement.

Access to these controls is provided by means of a removable end plate. Remove the 3 retaining screws

using 2.5m A/F hex wrench and withdraw end plate.

Caution: Care should be taken in withdrawing end plate so as not to disconnect internal plug.

To maintain sealing integrity ensure end cap ‘O’ ring is correctly seated, and clean prior to re-fitting.

RANGE SWITCH DETAILS

Switch Position

(Current Mode) Range Switch Position

(Voltage Mode) Range

0Not Used 8W

1Not Used 9X

2Not Used A Y

3Not Used BZ

4WCNot Used

5X D Not Used

6YENot Used

7ZFNot Used

Range Downranging Scope

(Nominal)

W110 to 74%

X78 to 52%

Y54 to 37%

Z47 to 32%

LOAD RESISTANCE (4-20mA Transmitter)

The total permissible resistive load in the loop (to include all the cable resistance) can be from 'zero to

50 x (supply volts -8.5) ohms' e.g. with a 12V d.c. supply the permissible load is from zero up to 175

ohms (Figure 1).

Figure 1

MAINTENANCE

Routine Inspection: Not required except for periodic inspection of the cable and molding to ensure

that these are neither damaged nor softened by incompatible liquid.

CAUTION

CARE MUST BE TAKEN NOT TO TOUCH THE PRESSURE SENSITIVE

DIAPHRAGM WHILE CLEANING THE PRESSURE PORT. FAILURE TO

OBSERVE THIS PRECAUTION CAN CAUSE IRREPARABLE DAMAGE.

WARRANTY

The Company warrants its products to be free from defects in material and workmanship in normal use

and service for a period of two years from date of shipment. The Company reserves the right and

option to refund the purchase price in lieu of repair or replacement upon evaluation of the returned

original part. Modification, misuse, attempted repair by others, improper installation or operation shall

render this guarantee null and void. The Company makes no warranty of merchantability or fitness for a

part or purpose.

SERVICING

The transducer cannot be repaired locally and if damaged should be returned to Setra Systems with the

following:

1. Name and phone number of person to contact

2. Shipping and billing information

3. Full description of malfunction

4. Remove any pressure fittings and plumbing that you may have installed and enclose any required

mating electrical connectors and wiring diagrams.

Please ship prepaid to Setra Systems at the address shown below or to your local Setra Distributor

when a replacement/repair is required:

United States Outside The United States

Setra Systems Inc Contact your local Setra Distributor

159 Swanson Road

Boxborough. MA 01719

Attn: Repair Department

RETURN TO FACTORY

PLEASE NOTE: To comply with Health and Safety requirements, the instrument must be clean and

safe to handle and accompanied by a formal statement to that effect duly signed by an authorised officer

of the Company.

Any instrument returned without certification will be quarantined and no action will occur until cleared. It

may ultimately be returned to you and subject to a transportation charge.

W A R N I N G

* IF INSTRUMENT IS SUBJECTED TO +400°C PLUS

Some instruments use Viton sealant. Above +400°C this material decomposes

producing (amongst others) Hydrofluoric Acid which is extremely corrosive

* DO NOT ALLOW CONTACT WITH SKIN

If it is suspected that an instrument has been subjected to temperatures in

excess of +400°C

* CONTACT OUR SALES OR SERVICE DEPARTMENT TO

ASCERTAIN IF THE INSTRUMENT CONTAINS VITON

W A R N I N G

ELECTRICAL CONNECTIONS

4-20MA VOLTAGE

IN+IN-GROUND IN+COM OUT+GROUND

CABLE RBL DRAIN RWYDRAIN

CONNECTOR 1 2 E123E

OUTPUT SUPPLY VOLTAGE

4-20mA 9 - 35V d.c.

0.5 - 5.5V d.c. 7.5 - 35V d.c.

1 - 6V d.c. 8 - 35V d.c.

0 - 5V d.c. 7.5 - 35V d.c.

0.1 - 5.1V d.c. 7.5 - 35V d.c.

1 - 5V d.c. 7.5 - 35V d.c.

159 Swanson Road, Boxborough, MA 01719-1304

Tel: 800-257-3872 / 978-263-1400

OP550 Rev A 11/03

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