Owner's manual

<6 BASIC OPERATION> 6-15
IM 11Y01B02-01E-A 4th Edition September 11, 2012-00
NON-PROCESS PATH LENGTH
Thisistheopticalpathlengthinsidethelaser&detect
measurementunit.Typicalvalueswouldbe3.5”to4”withthe
defaultvaluetouseat3.75”.Notethatthisdimensionwillvary
between analyzers.
Contact Yokogawa if unsure.
NON-PROCESS PRESSURE
This is the pressure of the non-process gas. Typically,
thiswillbeclosetoatmosphericpressureof1.01BarAor
14.7PsiA.Checktheactualoperatingconditionsandenterthe
appropriate value. Contact Yokogawa if unsure.
NON-PROCESS TEMPERATURE
This is the temperature of the non-process gas with two
modes of input:
ACTIVEAMBIENT-ambientgastemperaturederivedfrom
integral sensor on detector circuit with offset adjustment
(typically-18degC).Notethisoff-setisduetotheinternal
heat of the controller unit, where the detect board is located in
TDLS220
FIXED–manualinputofxedtemperaturevalue
NON-PROCESS CONCENTRATION
This is the concentration of the non-process measurement
gas.ForInstrumentAirpurgegas,thetypicalvaluewouldbe
20.9%O2.
IfmeasuringCOintheprocessgasandthepurgegasis
Instrument Air, then these parameters are not applicable
becausetheCOconcentrationstypicallyfoundinInstrument
Air are below practical detection limits.