Teledyne 9060Z Oxygen Equipment User Manual

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Model9060ZManual

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43

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8.2CALIBRATIONMODEFUNCTIONS

8.2.1REFERENCEVOLTAGES

Thecalibrationoftheanalogueinputsisbasedonthevoltageofatemperaturecompensatedvoltage

reference integrated circuit. There are 4 voltages generated from the standard reference voltage.

Theywillvarybyabout1%fromonetransmittertoanotherbutcanbetrimmedbysettingtheactual

voltages into CALIBRATION menu functions #1 to 4. These voltages should be measured and the

referencevoltageentriesinthemenucheckedeveryyear.

8.2.2OUTPUTCHANNEL1AND2CALIBRATION

The output 4‐20mA calibration can be set either AUTOMATICALLY (default) or MANUALLY. If Auto

Calibratedisselectedthetransmitterwillgothroughanoutputcalibrationcyclewhenthepoweris

turnedonorwhentheAUTOCALbuttonispressedinSETUPmode.Thiswilldiverttheoutputsback

totheinputandautomaticallysetthe4mAand20mAcalibration.

IfManually Calibratedis selectedthenthe 4mA and20mAcalibration must beset inthe nexttwo

functions.Forthefullexplanationseechapter10.1.2.

8.2.3AMBIENTTEMPERATURECALIBRATION

The ambient temperature measurement is used as the cold junction temperature for the

thermocouplemeasurements.Useanindependenttemperaturesensortomeasurethetemperature

inside the transmitter case near the screwterminal #1. Enter this temperature into the calibration

function11byusingtheOPTIONkeysandthentheENTERkey.

8.2.4LOWOXYGENCALIBRATION

The low oxygen calibration factors can be used to fine tune the oxygen calculation at low oxygen

readings.Itwillnotaffectthemeasurementat20.9%.Theyareincludedtoallowoxygenprobesmade

byothermanufacturerstobeusedonaTeledyneAnalyticalInstrumentstransmitter.Thedefaultis

100%butcanbesettobetween80and120%.

8.2.5TRANSMITTEROUTPUTSCALE

Thetransmitteroutputscanbeconfiguredtoeither4‐20mAor0‐20mA.Thetwoscaledoutputsare

capable of outputting 0‐24mA and will transmit over‐scale unless the over‐scale limit option is

selected.

8.2.6TRANSMITTEROUTPUTLIMITING

Iftheoxygenreadingisinvalidtheoutputcanbemadetobesetto0mA,4mAor20mA.Aninvalid

readingiswhentheprobetemperatureisbelow650°C(1200°F)ortheprobethermocouplehasbeen

detected as open circuit. The default is to set the output to 20mA but the function can also be

disabled.

8.2.7MAINSVOLTAGEDETECTION

Thedefaultsettingforthe9060Ztransmitteristhatitwillautomaticallydetectthemainsvoltageand

frequencyinordertocorrectlydrivetheprobeheaters.Ifthereisanyuncertaintyinthisdetection

systemthevoltagecanbeforcedto220‐240or100‐127,andthefrequencycanbesetto50or60Hz.



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Teledyne 9060Z Oxygen Equipment User Manual