RayTek MARATHON FA - 2 C;1 C Switch; Peak Hold (PKH); Averaging (AVG)

Operation
28 MarathonSeriesFA/FR

Theslopeisthedecidingparameterformeasurementsin2‐colormode!Theemissivity
affectsonlymeasurementsin1‐colormode.
Forinformationondetermininganunknownslope,andforsampleslopes,refertosection
11.3Typical
Slopes,p.
56.
Tochangetheunit’sslopesetting,completethefollowing:
1. Makesurethe2CLEDislit.
2. PresstheModebuttonuntiltheЄLEDislit.Thecurrentslopevalueshowsonthedisplay.
3. Pressthec ord buttontochangethevalue.
4. Pressthe
Modebutton several times untilthe C or F LEDislit.The displayedtemperature
willnowbebasedonthenewslopevalue.
6.2.42C/1CSwitch
Toswitchbetween2‐colorand1‐colortemperaturemeasurementpushthe2C/1Cselectorbutton.Alit
LEDindicatestheactivemeasurementmethod.SwitchingaffectstheLEDdisplayandanalogoutbut
nottheRS485out.
6.2.5PeakHold(PKH)
WithPeakHold,therespectivelastpeakvalueisheldforthedurationofHoldTime.
TosetandactivatePeakHold,dothefollowing:
1. PresstheModebuttonuntilthePKHLEDislit.
2. Pressthecbuttontobothsetandactivate.Thedisplayreadsin0.1
seconds.SetPeakHold
from0.1to299.9seconds.IfPeakHoldissetto300.0seconds,ahardwareresetisneededto
triggeranotherreading.IfPeakHoldissetto0.0seconds,thefunctionisdeactivated.
3. PresstheModebuttonuntiltheCorFLEDislit.
IfPeakHoldhasbeenactivated,thePeak
LEDwillstaylit.
OncePeakHoldissetabove0,itautomaticallyactivates.Theoutputsignalremainsthesameuntilone
oftwothingshappens:
• Thepeakholdtimerunsout.Inthiscase,thesignalrevertstoactualtemperature.
•
The actual temperature goes above the hold temperature. In this case, starts holding new
peak.
Notethatotherholdfunctions(likeValleyHoldorAveraging)cannotbeusedconcurrently.
Bymeansofthesoftwareotherholdfunctionsareadjustable(e.g.AdvancedPeakHold).
6.2.6Averaging(AVG)
Averagingcanbeusefulwhenanaveragetemperatureoveraspecificdurationisdesired,orwhena
smoothingoffluctuatingtemperaturesisrequired.
The averaging algorithm simulates a first order low pass RC filter whose time constant can be
adjusted to match the user’s averaging needs. The following figure illustrates an
 averaging output
signal.