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UEi SSM1 User manual

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SSM1
Instruction Manual
Measures
•Pressurefrom0~500psia
•Temperaturefrom-40˚~400˚F
Calculates
•Superheatforlowside
•Subcoolforhighside
(TVX)Systems
Refrigerants:
•R22
•R134a
•R404a
•R410a
Super Heat / Sub Cool Meter
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SSM1:
Super Heat / Sub Cool Meter
ThankyouforpurchasingtheUEiSSM1
Superheat/SubcoolMeter.UsetheSSM1to
measuresuperheatandsubcoolbydirectconnec-
tionsfortemperatureandpressure.TheSSM1is
programmedwiththemostcommonfourrefrigerants,
withdatafromtheNIST-Prorefrigerationdatabase
fortemperature-pressurevalues.
Technical Note
Superheatandsubcoolarethemosteffective
measurestodetermineifasystemisproperly
chargedandoperatingwithinmanufacture
guidelines.
1.
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What is Super Heat / Sub Cool?
Refrigerantsuperheatreferstotherisein
temperatureofvaporaftertherefrigeranthascom-
pletelychangedfromaliquidtoagas.Thedewpoint
(temperatureatmeasuredpressurewhereallofthe
liquidevaporates)isdeterminedbypropertiesofthe
refrigerantandmeasuringthepressure.Whencom-
paringthistothemeasuredpipetemperatureofthe
returnlinewilldeterminesuperheat.TheSSM1will
calculatethisvaluedirectlyandupdateinrealtime.
Usesuperheatonxedoriceorcapillarysystems.
Refrigerantsubcoolingreferstothedropin
temperatureofliquidrefrigerantafterithascom-
pletelychangedfromagastoaliquid.Theboiling
point(temperatureatmeasuredpressurewherethe
liquidstopsboilingandstartstofurthercool)isdeter-
minedbypropertiesoftherefrigerantandmeasuring
pressure.Whencomparingthistothemeasuredpipe
temperatureattheexitofthecondenserdetermines
subcooling.TheSSM1willcalculatethisvalue
directly,andupdateinrealtime.UseSubcooling
onTXVsystems,astheyaredesignedtomaintaina
constantsuperheat.
2.
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OPERATION
1. Presstopowerthemeteron
2. ZeroPressure:Whiledisplayingpressureholdthe
“Pressure/TEMP”buttonfor3seconds.
3. Pressthe“Pressure/TEMP”buttontoselectthe
pressureortemperaturemode.
4. RefrigerantType:Pressthe“RefrigType”buttonto
scrollthroughtheavailablerefrigeranttypes
(R22,R134a,R404A,R40A).
5. Press“”buttontoswitchthebacklightonoroff.
6. Press“TempSH/SC”whiledisplayingtemperatureto
scrollthrougheithertheprobetemperature,calculated
superheatorcalculatedsubcool.
7. Press“Scale”toselectdesiredunitsforpressureor
temperature.Theavailableunitsforpressureinclude
PSI,BAR,KPA,Kg/cm2,InHgandcmHg.Theavailable
unitsfortemperatureinclude°Fand°C.
3.
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4.
CONNECTIONS
1. Connectastandardrefrigeranthosetothe¼”are
connectorontopoftheSSM1.(Fig.1)-OR-Connectthe
SSM1in-linetoarefrigerantsourceusingthetee
tting(Fig.2)
2. Connecttheincludedpipeclampprobetothek-type
inputjackontopoftheSSM1.(Fig.1)
Fig.2Fig.1
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MEASURING SUPERHEAT
1.Connectthepressuretothesuctionline
serviceport
2.Attachthepipeclamptemperatureprobetothe
suctionline(mustbeatleast6”fromthe
compressor)
1.
2.
5.
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5.Add/removerefrigerantbyconnectingtheSSM1
in-linetoarefrigerantsourceandmonitorpressure
whileaddingorremovingrefrigerant.
NOTE: Refer to manufacturers
specification and procedures
when adding / removing
refrigerant.
6.
3.Press“RefrigType”to
selecttheproper
refrigerant.Theselected
refrigeranttypewillshow
onthedisplay.*
4.Press“TEMPSH/SC”to
selectthedesired
parametertoview.
*
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MEASURING SUBCOOL
1.Connectpressuretotheliquidlineserviceport
2.Attachthepipeclamptemperatureprobeonthe
condenserexitline
7.
1.
2.
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3.Press“RefrigType”to
selecttheproper
refrigerant.Theselected
refrigeranttypewillshow
onthedisplay.*
4.Press“TEMPSH/SC”to
selectthedesired
parametertoview.
8.
*
5.Add/removerefrigerantbyconnectingtheSSM1
in-linetoarefrigerantsourceandmonitorpressure
whileaddingorremovingrefrigerant.
NOTE: Refer to manufacturers
specification and procedures
when adding / removing
refrigerant.
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TEMPERATURE CALIBRATION
Aprocesstosettemperaturecalibrationtoanice
pointisincludedtocompensatefordifferencesin
temperaturesensors,ortoresettheunittoproper
operation.Pleasefollowthesestepstoperforma
temperatureset;
1. Connecttemperatureprobe
2. Press“PressureTEMP”todisplayprobe
temperature(verifythat“TEMP”isshownon
theLCD.
3. Placethetemperatureprobesensingareaina
mixtureofcrushediceandwater.(Distilled
waterwillprovidethemostaccuratesource)
4. Stirtheicewatermixturewiththetemperature
probeandallowthereadingtostabilize
5. Pressandhold“TempSH/SC”buttonforfour
seconds
Thiswillsettheicepointto32°F.Themeterwill
compensateforchangesupto10°F.
9.
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10.
SPECIFICATIONS
• OperatingEnvironment:32~122°F
• StorageEnvironment:0~140°F
• Over-rangeindication:OL
• Autopoweroff:After30minutesidle
NOTE: Turn OFF when not in use to extend
battery life.
• Battery:Standard9Vbattery,NEDA1604,
IEC6F22
Function Resolution Accuracy
0~500psia 0.1psi ±0.5%FS+1
(2kPa,0.02bars) 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)
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