User Manual

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©2014PacketPowerLLCwww.packetpower.comEM31.2 16
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DIFFERENTIALPRESSURESENSING
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DIFFERENTIALPRESSUREMONITOR:Monitorsequippedwith
thedifferentialsensingoptioncansensechangeinairpressure
betweentwoareas.Tomonitordifferentialpressurethetwo
sensingtubesneedtobeplacedinareaswithdifferentpressures
suchisanoppositessidesofabaffle,raisedfloororserverrack.
MONITORING
AIRFLOW:Byplacingonetubeindirectpathof
theflow(i.e.atthebaseofaservercabinetbytheairintake)and
thesecondtubeintheambientareawithlittleairflow(i.e.the
topexterioroftheservercabinet),theresultingpressure
differentialwillbe
indicativeofthedegreeofairflow.Keepin
mindthatthisisnotameasurementofairflowbutrathera
relativeindication.Alowerdifferentialpressurewillindicatea
lowerairflowrateandahigherpressurevalueahigherflow
rate.
Notetheareamonitoringthehigher
pressure(orfasterairflow)
shouldusethetubemarkedwiththe(+)positivesymbol.Thearea
withthelowerpressureorslowerflowshouldusethetube
markedwiththe(‐)negativesymbol.Thedifferentialpressureis
expressedinPascals(±500Pain0.2Paor±3%accuracy)
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HUMIDITYSENSING
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HUMIDITY:Environmentalmonitorsequippedwiththehumiditysensingoptioncansenserelative
humidity.Thehumiditysensorisembeddedinsidethemonitor.Placementofmonitorshouldbeinan
open,non‐enclosedenvironment.Humidityismeasuredfrom0to100%RelativeHumidityat±2%RH
at0.1%resolution.
Monitorwithdifferentialpressure
sensingoption.
ServerRackFlowSensing:Intheabove
applicationthedifferentialpressurewill
increaseastheairflowspeedincreases.