Page|12
41 Daggett Drive, San Jose, CA 95134
Phone: +1 (650) 962 9620 Fax: +1 (650) 962-9647 Email: info@mmr-tech.com Web: www.mmr‐tech.com
GeneralOperation
4 . Stand‐by Temperature. The temperature to which the Seekbeck stage is to be set after the
experimentiscompleted.
5.CurrentTemperature.Theactual,presenttemperatureoftheColdStage.
6.TargetTemperature.Thetemperatureatwhichthepresentactivityofthesystemistargeted.Itcan
betheInitial Temperature, the Measurementpoint Temperature, or the Standby Temperature. The
temperature setting process is complete when the Current Temperature is equal to the Target
Temperature.
7.CurrentPower.ThepowerbeingappliedpresentlytotheMMRColdStagebythe‘K2000MMR
TemperatureController.'
8.Temperature
Step.Thedifferencebetweentwosuccessivemeasurementpoints.
9. Sweep Speed (Ramp Rate). The rate at which the temperature is changed from one
measurementpointtothenext.
10. ModulationPower.ThevalueofthepowerappliedtotheSeebeckstageheatertoproducea
temperaturegradientacro ssthesamples.
11.InitialTimeDelay. ThewaitingperiodfromthetimetheColdStagereachesthemeasurement
temperature, until the system takes the first set of readings. This delay is needed to allow the
SeebeckStagetoreachequilibriumwiththeColdStage.
12. Operating Time Delay. The waiting period from
the time the Seebeck Stage heater is turned
on,untilthesecondsetofreadingsaretaken.Thisallowsasteadystatetobereachedacrossthe
SeebeckStage.
13. Reference Thermo‐Voltage. The specific thermo voltage (Seebeck Coefficient) of the known
junction; used in the Seebeck Stage as
a reference. Since this parameter changes with
temperature,thedataacquisitionsoftwareincludesafilewitha look‐uptabletoprovidethevalue
whichcorrespondstothatforthesettemperature.TheStandardMMRSeebeckSystemissupplied
with a lookup table for Constantan (as the reference material) relative to
copper along with
ConstantanrelativetoPdAg.
14.AveragingParameter.Theparameterthatdefinesthenumberofacquireddatareadingsmade
during the measurement time interval, which are subsequently averaged at one measurement
point.Theparameter can varyfrom0 to7.Theactual number of data readingsis calculate d
as a
correspondingpowerof2,soaparameter0means2°,oronereading,whileaparameter7means
27,or128readings.MMRRecommendsasettingof'2'formostexperiments.
To Next Page
Loading...
Need help?
General