User guide

IM 11M06D03-01E-A

VI. INSTALLATION, AUTOMATIC CALIBRATION, AC1

6.1LOCATION

Thefollowingguidelinesshouldbeusedwhenselectingalocationforthecalibrationunit:

1) Easily accessible for maintenance and inspections.

2) AsclosetotheZR22probeaspractical.Thiswillminimizetheamountoftubingrequiredforplumbing,and

 decreasecalibrationtimes.Ambienttemperatureshouldnotexceed55˚C(131˚F).

3) Humidityismoderateandnocorrosivegasesarepresent

Use an air purge for the AC1 enclosure if the corrosive gases or high dust content is present.

4) Minimal vibration

5) Clean, dry instrument air is available

6.2MOUNTINGTHEAC1

TheAC1isavailableinaNEMAandNEMA4X,lockableenclosure,andtheunitisdesignedforwallmounting.Itcan

be secured using four (4) standoffs and four (4) bolts. Mount the AC1 unit so that the terminal strip is easily visible for

wiringpurposes.Sufcientroomshouldbemadeavailableforconnectingthecalibrationandreferencegastubing.

Theunitmustbemountedaslevelaspossibletoensuretheaccuracyoftheowrates

6.3PIPING

AlistofrecommendedpartforpipingtotheMC1andAC1unitsislistedpreviouslyinTable4.1

6.3.1PIPINGTOTHEZR22GOXYGENPROBE

6.3.2CONNECTIONTOTHECALIBRATIONGASINLET

ConnectthetubingfromtheZero(cal)gasoutput,showninFigure5.1,totheCALINsideoftheZR22probe.Ifthe

processisapositivepressureapplication,ensurethatacheckvalve(YokogawaPartNumberM1234VV-A)is

installedbetweentheCALINportandthe1/4”tubing.Thecheckvalvemayalreadybeinstalledonthedetector

prior to shipping.

6.3.3CONNECTIONTOTHEREFERENCEGASINLET

ConnectthetubingfromtheReferencegasoutput,showninFigure5.1,totheREFINsideoftheZR22probe.

Clean,dryinstrumentairisrecommendedasareference(span)gas;however,ambientairmaybeusedasa

substitute.

6.4.WIRINGTOTHEAC1,AUTOMATICCALIBRATIONUNIT

6.4.1WIRINGTHEAC1TOTHEZR22G

ThesolenoidsoftheAC1arepoweredby24VDCfromtheZR402GOxygenConverter.TheAC1itselfcanbe

poweredbytheZR402GiftheZR402Gisusing120VAC,60Hz.SupplyvoltagefortheAC1canbeobtainedfrom

terminals“L,N&G”ontheZR402G.PleaserefertothewiringdiagramlocatedinAppendixC.

NOTE