Siemens LMV5 Series Technical Instructions

LMVSeriesTechnicalInstructions 
DocumentNo.LV5‐1000
SCCInc. Page17 Section7

AZLSays“MeasurementnotSuccessful”WhenMeasuringtheDelayTimeforO2Trim

WhensettingthelowfirepointorthehighfirepointontheO
2
controlcurve,theAZLmeasures
whatiscalledthe“delaytime”(Tautime).Thedelaytimeisdefinedasthelengthoftimeit
takesachangeintheairdamperpositiontobedetectedbytheO
2
sensor.Thistimeislongerat
lowfireandshorterathighfireduetogasvelocity.Ifanerroroccurswhiletryingtomeasure
thisdelaytime,theAZLsays“MeasurementnotSuccessful”.

Totroubleshootthis,checkthefollowing:

1) VerifythatOptgModeissetto“mandeact”usingthefollowingmenupath:

Params&Display>O2Contr/Alarm>Gas/OilSettings>OptgMode

2) VerifythatLowfireAdaptPtNoissetto2(combustioncurvepoint2)orhigherifdesired.By
default,thisparameterissetto“X”(undefined).
Themenupathforthisparameteris:

Params&Display>O2Contr/Alarm>Gas/OilSettings>ControlParam>
LowfireAdaptPtNo

3) Ifbothoftheaboveparametersaresetcorrectly,thenitispossiblethattheO
2
readingson
theratiocontrolcurveweresetincorrectly.WhensettingeachpointontheO
2
control
curve,theLMV5willpromptwiththemessage“WhenvaluestablecontinuewENTER”.
PressingENTERthensetsthe%O
2
fortheratiocontrolcurve.IfENTERispressedtooearly
beforetheO
2
valuehasstabilized,anon‐representativeO
2
valuewillbeenteredforthe
ratiocontrolcurve.Ifthisisthecase,gobackintotheO
2
controlcurveandateachpoint
waittogetastablereadingbeforepressingENTERtoensurethattheO
2
readingis
representativeofthecurrentairdamperposition.30‐60secondsisnottoolongtowait
oncethearrow(>)turnsintoacolon(:)indicatingthattheactuatorshavestoppedmoving.














HOME

Siemens LMV5 Series Specifications

General

Brand	Siemens
Model	LMV5 Series
Category	Control Systems
Language	English