SSM1Instruction Manual

Measures •Pressurefrom0~500psia •Temperaturefrom-40˚~400˚F

Calculates •Superheatforlowside •Subcoolforhighside (TVX)Systems

Refrigerants: •R22 •R134a •R404a •R410a

1.800.547.5740www.ueitest.com

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SSM1: Super Heat / Sub Cool Meter

ThankyouforpurchasingtheUEiSSM1Superheat/SubcoolMeter.UsetheSSM1tomeasuresuperheatandsubcoolbydirectconnec-tionsfortemperatureandpressure.TheSSM1isprogrammedwiththemostcommonfourrefrigerants,withdatafromtheNIST-Prorefrigerationdatabasefortemperature-pressurevalues.

Technical NoteSuperheatandsubcoolarethemosteffectivemeasurestodetermineifasystemisproperlychargedandoperatingwithinmanufacture

guidelines.

1.

What is Super Heat / Sub Cool? Refrigerantsuperheatreferstotheriseintemperatureofvaporaftertherefrigeranthascom-pletelychangedfromaliquidtoagas.Thedewpoint(temperatureatmeasuredpressurewherealloftheliquidevaporates)isdeterminedbypropertiesoftherefrigerantandmeasuringthepressure.Whencom-paringthistothemeasuredpipetemperatureofthereturnlinewilldeterminesuperheat.TheSSM1willcalculatethisvaluedirectlyandupdateinrealtime.Usesuperheatonfixedorificeorcapillarysystems.

Refrigerantsubcoolingreferstothedropintemperatureofliquidrefrigerantafterithascom-pletelychangedfromagastoaliquid.Theboilingpoint(temperatureatmeasuredpressurewheretheliquidstopsboilingandstartstofurthercool)isdeter-minedbypropertiesoftherefrigerantandmeasuringpressure.Whencomparingthistothemeasuredpipetemperatureattheexitofthecondenserdeterminessubcooling.TheSSM1willcalculatethisvaluedirectly,andupdateinrealtime.UseSubcoolingonTXVsystems,astheyaredesignedtomaintainaconstantsuperheat.

2.

OPERATION

1. Presstopowerthemeteron

2. ZeroPressure:Whiledisplayingpressureholdthe “Pressure/TEMP”buttonfor3seconds.

3. Pressthe“Pressure/TEMP”buttontoselectthe pressureortemperaturemode. 4. RefrigerantType:Pressthe“RefrigType”buttonto scrollthroughtheavailablerefrigeranttypes (R22,R134a,R404A,R40A).

5. Press“”buttontoswitchthebacklightonoroff.

6. Press“TempSH/SC”whiledisplayingtemperatureto scrollthrougheithertheprobetemperature,calculated superheatorcalculatedsubcool.

7. Press“Scale”toselectdesiredunitsforpressureor temperature.Theavailableunitsforpressureinclude PSI,BAR,KPA,Kg/cm2,InHgandcmHg.Theavailable unitsfortemperatureinclude°Fand°C.

 

 

3.

4.

CONNECTIONS

1. Connectastandardrefrigeranthosetothe¼”flare connectorontopoftheSSM1.(Fig.1)-OR-Connectthe SSM1in-linetoarefrigerantsourceusingthetee fitting(Fig.2)

2. Connecttheincludedpipeclampprobetothek-type inputjackontopoftheSSM1.(Fig.1)

Fig.2Fig.1

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1.Connectthepressuretothesuctionline serviceport

2.Attachthepipeclamptemperatureprobetothe suctionline(mustbeatleast6”fromthe compressor)

1.

2.

5.

5.Add/removerefrigerantbyconnectingtheSSM1 in-linetoarefrigerantsourceandmonitorpressure whileaddingorremovingrefrigerant.

NOTE: Refer to manufacturers specification and procedures when adding / removing refrigerant.

6.

3.Press“RefrigType”to selecttheproper refrigerant.Theselected refrigeranttypewillshow onthedisplay.*

4.Press“TEMPSH/SC”to selectthedesired parametertoview.

*

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1.Connectpressuretotheliquidlineserviceport

2.Attachthepipeclamptemperatureprobeonthe condenserexitline

7.

1.

2.

3.Press“RefrigType”to selecttheproper refrigerant.Theselected refrigeranttypewillshow onthedisplay.*

4.Press“TEMPSH/SC”to selectthedesired parametertoview.

8.

*

5.Add/removerefrigerantbyconnectingtheSSM1 in-linetoarefrigerantsourceandmonitorpressure whileaddingorremovingrefrigerant.

NOTE: Refer to manufacturers specification and procedures when adding / removing refrigerant.

TEMPERATuRE CALIBRATION

Aprocesstosettemperaturecalibrationtoanicepointisincludedtocompensatefordifferencesintemperaturesensors,ortoresettheunittoproperoperation.Pleasefollowthesestepstoperformatemperatureset; 1. Connecttemperatureprobe 2. Press“PressureTEMP”todisplayprobe temperature(verifythat“TEMP”isshownon theLCD. 3. Placethetemperatureprobesensingareaina mixtureofcrushediceandwater.(Distilled waterwillprovidethemostaccuratesource) 4. Stirtheicewatermixturewiththetemperature probeandallowthereadingtostabilize 5. Pressandhold“TempSH/SC”buttonforfour seconds

Thiswillsettheicepointto32°F.Themeterwill compensateforchangesupto10°F.

9.

10.

SPECIFICATIONS

• OperatingEnvironment:32~122°F• StorageEnvironment:0~140°F• Over-rangeindication:OL• Autopoweroff:After30minutesidle NOTE: Turn OFF when not in use to extend battery life.• Battery:Standard9Vbattery,NEDA1604, IEC6F22

Function Resolution Accuracy0~500psia 0.1psi ±0.5%FS+1 (2kPa,0.02bars) digit

-40~400°F 0.1° ±1°F(-40~200°F)(-40~204°C) or±0.5°C(-40~93°C) ±2°F(201~400°F) or±1°C(94~204°C)

WARRANTyTheSSM1iswarrantedtobefreefromdefectsinmaterialsandworkmanshipforaperiodofthreeyearsfromthedateofpurchase.Ifwithinthewarrantyperiodyourinstrumentshouldbecomeinoperativefromsuchdefects,theunitwillberepairedorreplacedatUEi’soption.Thiswarrantycoversnormaluseanddoesnotcoverdamagewhichoccursinshipmentorfailurewhichresultsfromalteration,tampering,accident,misuse,abuse,neglectorimpropermaintenance.Batteriesandconsequentialdamageresultingfromfailedbatteriesarenotcoveredbywarranty. Anyimpliedwarranties,includingbutnotlimitedtoimpliedwarrantiesofmerchantabilityandfitnessforaparticularpurpose,arelimitedtotheexpresswarranty.UEishallnotbeliableforlossofuseoftheinstrumentorotherincidentalorconsequentialdam-ages,expenses,oreconomicloss,orforanyclaimorclaimsforsuchdamage,expensesoreconomicloss.Apurchasereceiptorotherproofoforiginalpurchasedatewillberequiredbeforewar-rantyrepairswillberendered.Instrumentsoutofwarrantywillberepaired(whenrepairable)foraservicecharge.Returntheunitpostagepaidandinsuredto:

UEi8030 SW Nimbus Ave.Beaverton, OR 97008

Copyright © 2010 UEi SSM1-MAN 5/10

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