Flowline LU78 EchoSwitch Manual do Utilizador descarregar pdf (Página 9)

RevA MN300282 9of34

GETTINGSTARTED(continued) StepFour

o ALARM –  Alarm operation allows for a single set point (Relay ON and OFF at the same level).

Choose between HIGH  and LOW operation.Both operations will require a single set point  and a

settingfortheHysteresis(HYSTER)



 HIGH–usedtocontrolaHighLevelalarm.Relaywillenergize(ON)whenthelevelisabove

thesettingandwillde‐energize(OFF)whenthelevelfallsbelowthesettingplusthe added

distancefromthehysteresis(HYSTER).

 LOW–usedtocontrolaLowLevelalarm.Relaywillenergize(ON)whenthelevelisbelow

thesettingandwillde‐energize(OFF)whenthelevelrisesabovethesettingplustheadded

distancefromthehysteresis(HYSTER).

 HYSTER–UsedtoreducechatterbycreatingahysteresisordifferentialfortheAlarmsetpoint.

TheHYST ERvaluewilladj usttheOFFpositionoftheAlarmsettingbytheHYSTERvalue.

 SAFE–Eachrelaycan beindividuallyconfiguredtoitsownfail‐safesetting.ChoosebetweenON,OFForHOLD.

o ON–Energizestherelaywhenafail‐safeconditionoccurs

o OFF–De‐energizestherelaywhenafail‐safeconditionoccurs

o HOLD–Keepstherelayinitscurrentstatewhenafail‐safeconditionoccurs

o OUTPUT–Setsthe4/20mAoutputstatewhentheechoislost.Theoptionsare4mA,21mAand

holdlastvalue.

 M‐PLEX – when two or three relays are configured as pumps, they can be inter–connected to alternate

betweeneachcycle.

o M‐PLEXisonlyavailablewhen2ormorerelaysaresetforpumps.

o M‐PLEX will not appear when only 1 relay is set for a pump or when the relay functions do not

match(ex:Relay1setforafillingpumpandRelay2setforanemptyingpump).

o SelectingNO‐ALTwillturnOFFtheM‐PLEX.

 HELP–Providessetupinformation,theabilitytoresettheEchoSwitch®andasimulationmodetotestthe

relayfunction

o SETUP–WilldisplaythesettingforallfunctionsofEchoSwitch®

o RESET–WillresettheEchoSwitch®backtoitsoriginalfactorysetting

o SIM‐T–SIM(ulation) ‐T(est) willallowtheendusertosimulatechangestoleveltoverifytherelay

settings.UsingtheUPandDOWNbuttonswillincrease

TEST P – This is a production test feature used by the factory to confirm operation.This mode

shouldonlybeusedwhensupervisedbyaFlowlinerepres entative.

 RUN–Returnstheunittonormalmeasurementandcontrolmode

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Flowline LU78 EchoSwitch Manual do Utilizador Página 9