Setra Systems 230 Manuale utente

Installation Guide

1-800-257-3872 Toll Free

1-978-264-0292 Fax

www.setra.com Web Site

✓

Certified

ISO

9001

Model 230

Wet/Wet Differential Pressure Transducer

Industrial

HVAC

Test &Measurement

Barometric

UltraHighPurity/Sanitary

Setra offers a complete line of

products for these industries:

Table of Contents

1.0 GENERAL INFORMATION............................................................................................... 1

2.0 MECHANICAL INSTALLATION ...................................................................................... 1

2.1 Media Compatibility .......................................................................................... 1

2.2 Environment......................................................................................................... 1

2.3 Pressure Fittings.................................................................................................. 1

2.4 Moisture Precautions ........................................................................................ 1

2.5 Mounting............................................................................................................... 1

2.6 Installation Procedures..................................................................................... 2

2.7 Bleeding thePressurePorts............................................................................ 2

2.8 3-Valve Manifold Assembly Procedure ........................................................ 3

3.0 ELECTRICAL INSTALLATION .......................................................................................... 3

3.1 Voltage Output Units......................................................................................... 4

3.2 Current Output Units ........................................................................................ 4

4.0. CALIBRATION .................................................................................................................... 4

4.1 Voltage Output Zero Adjustment ................................................................. 5

4.2 Voltage Output Span Adjustment ................................................................ 5

4.3 Current Output Zero Adjustment................................................................. 5

4.4 CurrentOutput Span Adjustment................................................................ 5

5.0 RETURNING PRODUCTSFOR REPAIR......................................................................... 6

6.0 WARRANTY AND LIMITATION OF LIABILITY............................................................ 6

Setra Model 230

Wet/Wet Differential PressureTransducer

1.0 GENERAL INFORMATION

Every Model 230 has been tested and calibrated before shipment.Setra

Systems230pressure transducers sense differential pressure and convert this

difference in pressure to a proportional high level analog output. The 230 is

supplied with either a 0 to 5VDC or 0 to 10VDC voltage output or a current

outputof4to20mA.

2.0 MECHANICAL INSTALLATION

2.1 Media Compatibility

Model 230 transducers are designed to be used with any gas or liquid compat-

ible with 17-4 PH stainless steel,300 series stainless steel and,viton/silicone or

Buna-N“O”-RIngs.The optional 3-valve manifold assembly is designed to be

used with gases or liquids compatible with 360 Brass,Acetal plug valves and

Nitrite O-rings.Never totally submerge the unit in any liquid.

2.2 Environment

The operating temperature limits of the 230 are as follows:

OperatingTemperature Range °F (C°) 0 to +175(-18to +80)

CompensatedTemperature Range°F (C°) +30 to +150 (-1 to +65)

2.3 Pressure Fittings

Typically,standardpipe fittings andinstallationprocedures should beused.

TheModel 230 has1/4”–18 NPT internal fittings.Thehighpressure port is

labeled“HIGH”.The optional 3-valve manifold assembly is supplied with

1/4”–18NPT internal fittings.

2.4 Moisture Precautions

TheModel 230 isprovidedwithtwo 0.875DIAconduit openings for electrical

termination,intended for a 1/2”I.D.conduit connection. These openings must

be sealed according to standard industry practice,in order to prevent moisture

ingress into the Model 256.

2.5 Mounting

The Model 230 is supplied with a mounting bracket and two 6-32 x 3/8 hex

headscrews.Attachbracket to mounting location first,using holes orband

clamp notches available on large section of the bracket.Attach transducer to

bracket by using the two 6-32 x 3/8 hex head screws and the two tapped holes

locatedonthe undersideofthe transducer.

2.6 Installation Procedures

If the Model 230 is supplied with an optional 3-Valve Manifold assembly,refer

tosection 2.8,Optional3-ValveManifoldAssemblyProcedure,forfurther

installationprocedures.If theModel 230 isnotsupplied withaSetra3-Valve

manifold,the following installation procedure is recommended.

For differential pressure

measurements at high

linepressure(250 psig max.),

itis recommended that the

pressuresensor be installed

with a valve in each line,plus

ashunt valveacrossthe high

and low (reference) pressure

ports,as shown.

2.7 BLEEDINGTHE PRESSURE PORTS

3bleed screws are onthe side oftheunit (2for low pressureport,1 for high

pressure port). Install the transducer in its intended location and pressurize the

ports. Back off the first bleed screw mounted on the flat side of the sensor

body(2 turnsmax.)until liquid beginsto flow out. After onlybubble-freeliquid

flows out,retighten the bleed screw. Repeat same procedure for the second set

ofbleed screwslocatedonthe round sectionof thelowpressurefitting.

Top View

Transducer Mounting Holes

(screws provided: mounts to

bottom of 230 transducer)

Notched for clamp mounting

Front View

Side View

with Transducer

mounted to bracket

3.00

76 2.50

0.52

13 0.88

22 1.30

0.43

0.156

.096

φφ

1.63

1.50

0.875

φφ

Conduit

Opening

Valve A Valve B

High Low

Differential

Pressure

Sensor

Valve C

High Low

Valve A = High Side Valv

Valve B = Low Side Valve

Valve C = Shunt Valve

ValveC should beopenandValvesA and Bclosed whenever the systemisfirst

being wetted or pressurized. Valves A and B should then be opened slowly to

avoid hammering. Valve C can then be closed and the system is operating.

When the differential pressure sensor is to be removed,Valve C must be opened

first,thenValves AandB can beclosed.

2.8Optional 3-Valve ManifoldProcedure

The3-ValveManifold Assembly is normallyshipped with valvesV1 andV2

closed andV3 open.

ToplacetheDPT230 intoservice:

1. ConfirmvalvesV1 andV2 areclosed andvalveV3 isopen.

2. Mount the manifold and installprocessconnections.

3. Slowly openV2,thenV1.

4. Slowlyopen bleed screwsonthe Model DPT230

(see“Bleedingthe Pressure Ports”section above)to bleed thelinesof air.

5. Closethe bleed screwsonthe ModelDPT230.

6. CloseV3.

Toplacethe DPT230outofservice:

1. OpenV3 to equalize the pressure at the Model DPT230.

2. Close theV1andV2.

3. Open the bleed screws on the Model DPT230.

3.0 ELECTRICAL CONNECTIONS

To access electrical connections remove cover on top of Model 230.

V1 V2

3-ValveManifoldDescription

ManifoldBlock Brass

Valves(3) V1forconnectionto+port

V2forconnectionto-port

V3forequalizingpressure

Valvetype 90DegreeOn/Off

ProcessConnections 1/4”-18NPTInternalThread

For voltage output, use COM, OUT and

EXC terminals.

For current (4-20 mA) output, use +

and - terminals.

Diagram 1

3.1 Voltage Output Units

The Model 230 is a 3-wire circuit with three terminals available for wiring.

The - Excitation and - Output are commoned on the circuit.

Input Power

The 230 can operate from either 9-30 VDC for 0-5 VDC output version or

13-30 VDC for 0-10 VDC output version.

Excitation Connectedto positiveterminalof DCPowerSupply

COM Connect as the reference for power supply and output signal

OUT Connect to positive terminal of Control or Pressure Monitor

3.2 Current Output Units

Model230(currentoutput)transducers are true 2-wire,4-20 mA current

outputdevicesanddeliverrated current into anyexternal load of 0-1000ohms.

The 4-20 mA current output units are designed to have current flow in one

directiononly. PLEASE OBSERVE POLARITY.

We suggest that any electrical cable shield be connected to the system's

loopcircuit groundtoimprove electricalnoiserejection.

MIN Supply Voltage: 9 + .02 x (Resistance of receiver plus line)

MAXSupply Voltage: 30+.004 x(Resistanceof receiver plusline)

—

Power Sup

Setra

Transmitter

(4-20 mA)

Load

(Monito

—

4.0 CALIBRATION

The230transducerisfactorycalibratedandshouldrequirenofieldadjustment.

Wheneverpossible,anyzeroand/orspanoffsetsshould becorrectedby

softwareadjustmentinthe user’s controlsystem. However,zeroandspan

adjustmentsaremadebyremovingthecoveronthetopofthe230 and the

6-32sealscrewsintheplastic terminal block. Besure to reinstallsealscrews

afterzeroand/orspanadjustments.Currentoutputtransducers(4-20 mA)

arefactory calibratedusing a250 ohm load at24VDC. Zeroandspan adjust

mentsare approximately300mV(forvoltageunits)and±1.0mA (for current

units),individually.

The230Seriesiscalibrated with the diaphragmin the vertical position

(pressureportshorizontal). Forusein other orientations, position theunit and

adjustthezerobyfollowing the calibration procedurein the previous section.

Optimalresultswillbeachieved by using the factorycalibrated position. The

230positioneffectisas follows (pressure ports invertical plane): ±2% perg for

±.5D,±1D,1D,2Dranges. ±1%per g for all otherstandard ranges. There isa

negativeoutputshiftwiththe high pressure port facingup and a positiveshift

intheoutputwiththe high pressure port facingdown.

4.1 Voltage Output Zero Adjustment

Whilemonitoring thevoltagebetween thepositiveoutput (OUT) and

common, and with both pressure ports open to atmosphere, the zero may

be adjusted. For unidirectional pressure ranges, turn the zero adjustment

screw until a reading of 0.05 VDC (±25 mV for 0-5 VDC output or ±50 mV

for0-10 VDCoutput)is achieved. Forbidirectional pressure ranges,set zero

to 2.550 VDC (±25 mV) for 0-5 VDC output or 5.050 VDC (±50 mV) for

0-10 VDC output.

4.2 Voltage Output Span Adjustment

(Completethezeroadjustment beforesettingspan.)

Span or full scale output adjustments should only be performed by using

an accurate pressure standard (electronic manometer, digital pressure gage,

etc.), with at least comparable accuracy to the 230 series (±0.25% full scale).

With full range pressure applied to the high pressure port (reference port

open to atmosphere), adjust span to achieve 5.050 VDC (±25 mV) or

10.050 VDC (±50 mV).

Example 1: Unidirectional pressure range of 0 to 1 PSI

Apply1 PSI,adjustspan to5.050VDC (or 10.050VDC)

Example 2: Bidirectional pressure range of ±.5PSI

Apply.5 PSI,adjustspan to5.050VDC (or 10.050VDC)

4.3 Current Output Zero Adjustment

Whilemonitoringthe currentoutput,andwith bothpressureportsopen to

atmosphere,the zeromaybeadjusted. Forunidirectional pressure ranges,

turnthe zero adjustment screw until a readingof 4 mA(±.08 mA) isachieved.

For bidirectional ranges,set zero to 12 mA (±.08 mA).

4.4 Current Output Span Adjustment

Span or full scale output adjustments should only be performed by using an

accuratepressurestandard(electronicmanometer,digitalpressuregage,

etc.),withat least comparableaccuracy to the230series(±.25% full scale).

With full range pressure applied to the high pressure port (reference port

open to atmosphere),adjust span to achieve 20 mA (±0.08 mA) output.

Example 1: Unidirectional pressure range of 0 to 1 PSI

Apply 1 PSI, adjust span to 20 mA

Example 2: Bidirectional pressure range of ±.5 PSI

Apply .5 PSI, adjust span to 20 mA

5.0 RETURNING PRODUCTS FOR REPAIR

Pleasecontact a SetraSystemsapplicationengineer (1-800-257-3872,1-978-263-1400)

beforereturningunitforrepairtoreview informationrelativetoyourapplication.

Many times only minor field adjustments may be necessary.When returning a product

toSetra Systems,the material should becarefullypackaged andshipped prepaid to:

Setra Systems,Inc.

159Swanson Road

Boxborough,MA01719-1304

Attn:Repair Department

To assure prompt handling,please supply the following information and include it

insidethe packageor returned material:

1. Name and phone number of person to contact.

2. Shippingand billinginstructions.

3. Full description of the malfunction.

4. Identify any hazardous material used with product.

Notes: Please remove any pressure fittings and plumbing that you have installed and

enclose any required mating electrical connectors and wiring diagrams.

Allowapproximately3weeks after receiptatSetra Systems forthe repairandreturn of

theunit.Non-warrantyrepairs will notbe made withoutcustomerapprovalanda

purchase order to cover repair charges.

CalibrationServices

Setra maintains acomplete calibrationfacility that istraceableto theNationalInstitute

of Standards &Technology (NIST). If you would like to recalibrate or recertify your

Setra pressure transducers or transmitters,please call our Repair Department at 800-

257-3872(978-263-1400) for scheduling.

6.0 WARRANTY AND LIMITATION OF LIABILITY

SETRAwarrantsitsproductstobefreefromdefectsinmaterialsandworkmanship,subjecttothefollowingtermsandconditions: Withoutcharge,SETRAwillrepairorreplace

productsfoundtobedefectiveinmaterialsorworkmanshipwithinthewarrantyperiod;providedthat:

a) theproducthasnotbeensubjectedtoabuse,neglect,accident,incorrectwiringnotourown,improperinstallationorservicing,oruseinviolationofinstructions

furnishedbySETRA;

b) theproducthasnotbeenrepairedoralteredbyanyoneexceptSETRAoritsauthorizedserviceagencies;

c) theserialnumberordatecodehasnotbeenremoved,defaced,orotherwisechanged;and

d) examinationdiscloses,inthejudgmentofSETRA,thedefectinmaterialsorworkmanshipdevelopedundernormalinstallation,useandservice;

e) SETRAisnotifiedinadvanceofandtheproductisreturnedtoSETRAtransportationprepaid.

Unlessotherwisespecifiedinamanualorwarrantycard,oragreedtoinwritingandsignedbyaSETRAofficer,SETRApressureandaccelerationproductsshallbewarrantedfor

oneyearfromdateofsale.

Theforegoingwarrantyisinlieuofallwarranties,express,impliedorstatutory,includingbutnotlimitedto,anyimpliedwarrantyofmerchantabilityforaparticularpurpose.

SETRA’sliabilityforbreachofwarrantyislimitedtorepairorreplacement,orifthegoodscannotberepairedorreplaced,toarefundofthepurchaseprice. SETRA’sliabilityforall

otherbreachesislimitedtoarefundofthepurchaseprice. InnoinstanceshallSETRAbeliableforincidentalorconsequentialdamagesarisingfromabreachofwarranty,or

fromtheuseorinstallationofitsproducts.

NorepresentativeorpersonisauthorizedtogiveanywarrantyotherthanassetoutaboveortoassumeforSETRAanyotherliabilityinconnectionwiththesaleofits

products.

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