malema flow sensorsmalema flow sensors
malema flow sensorsmalema flow sensors
malema flow sensors 77
77
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Inline Ultrasonic Flowmeter
Ultrasonic Flowmeters
Pre - Start-up CheckPre - Start-up Check
Pre - Start-up CheckPre - Start-up Check
Pre - Start-up Check
Confirmthefollowingbeforeturningpoweron
•Wiringcorrespondswithfigure5
•Makesurethe flowsensor andthecontroller serialnumbers match.
•Verify cableconnectionbetweensensor andcontrollerfor theultrasonicflowmeteris secure.Ensurethat
theconnectoris lockedonwith apositive“click”.
•Makesure thesensor andthe controllerare connected beforepowering theunit.
•Powersupply voltageat terminal is24 VDC +10%
•Flowdirection correspondswith arrowmark ontheflow sensor.
•Flowdetectoris completelyfilledwith liquid.Confirmno leakage,nobubblesand nodepositsare
observed.Iftherearebubbles,eliminate thembyflushing.
Zero SetZero Set
Zero SetZero Set
Zero Set
Itisalwaysadvisableto “ZeroSet”duringinitialinstallation –beforestartingANYflow measurements. Please
followthe procedurelisted below toensure that the ZERO setis done inthe propersequence.
Caution: Incorrectly “ZERO” set on the flow meter would give erroneous readings.
•Flowliquidcontinuouslyto ensureALLair bubblesarepurgedout (largeandsmall bubbles).
•Shutoffflow –ensureliquidinsidethe sensortubingisSTATIONARY.
•Verifythereadingon thecontrollerunitas“ZERO”.
•Ifyes, theultrasonic flowmeter isready touse and doesnot haveto be“ZERO SET”
•Ifnot –ensurethat thereading isSTEADY. Thisindicates thattheflowmeter needsto be“ZERO” set.
•Press“ZERO”buttononthecontrollerwhilemaintainingSTATIONARY liquidinsidethetube.You
shouldsee thereading on thecontroller goto zeroin a fewseconds
•Whiletheflowmeterisbeing“ZERO SET”,theNORMledon thecontrollerwillblink.Thisis normal
andindicatesthattheunitis doinginternalcomputing.Donot beginflowliquidunlesstheNORM led
glowssteady.
•Whenthereadingreaches zero(withstationaryfluid), thentheultrasonicflowmeter isreadyforuse.
Calibration For Different FluidsCalibration For Different Fluids
Calibration For Different FluidsCalibration For Different Fluids
Calibration For Different Fluids
Ifthereisanychangeinthe“fluidmedium” i.eanyfluidotherthanthefluidonwhichthe flowmeterhasbeen
factorycalibrated theflowmeter needsto be“CLEAR”set so asto show flowreadings.
Pleasefollow theprocedure listed belowto ensurethat the CLEARset is donein theproper sequence
•Flowliquidcontinuouslyto ensureALLair bubblesarepurgedout (largeandsmall bubbles).
•Shutoffflow –ensureliquidinsidethe sensortubingisSTATIONARY.
•Press“CLEAR”buttononthecontrollerwhilemaintainingSTATIONARYliquidinsidethetube.You
shouldseethereadingon thecontrollerdisplay.This readingwillnecessarilynot bezeroalthoughthe
fluidisstationary.
•Toensurethatthe flowmeterreadssteady“ZERO” understationaryfluidconditions pleasefollowthe
stepsmentionedunder thesection “ZeroSet”.
