Hach 3650 manual Appendix a Glossary, Common Units, Terms and Definitions

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3650 Portable O2 Analyzer - Glossary	45 of 50

Appendix A: Glossary

A.1 Common Units

Table A-1: Common Units

Unit	Meaning

%percentage, by weight

% vbar	percentage per volume, barometric pressure referenced

% vext	percentage per volume, sample pressure compensated

cc/kg	cubic centimeters per kilogram

g/kg	grams per kilogram

mg/L	milligrams per liter

ml/L	milliliters per liter

ppb	parts per billion, by weight

ppm	parts per million, by weight

V/V	volume per volume (ratio)

A.2 Terms and Definitions

Table A-2: Terms and Definitions

	Terms	Meaning

	Absolute pressure	Absolute pressure is relative pressure, plus atmospheric pressure

	Concentration	The relative content of a component in a gaseous or liquid media.

	Conductivity	The reciprocal of electrical resistivity.

	Headspace	The empty volume above a liquid or solid in a closed container.

	Relative pressure	Relative pressure is absolute pressure, less atmospheric pressure
	Relative pressure	(this is the customary gauge reading).
		(this is the customary gauge reading).

	Resistivity	The opposition offered by a body or substance to the passage
	Resistivity	through it of a steady electric current.
		through it of a steady electric current.

KB - 18 March 2008 - Revision C

Operator Manual

ORBISPHERE

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Contents Operator Manual Page Product Recycling Information Orbisphere Following only applies to European customers Product DisposalMarking Restriction of Hazardous SubstancesTable of Contents Part Lists Accessories and Attachments Maintenance and TroubleshootingSpecifications CalibrationsRevision History Safety Conventions Safety PrecautionsManual Overview About this ManualService and Repairs Safety RecommendationsAcknowledgements Precautionary LabelsOrbisphere Installation Flow Chamber Installation Sensor InstallationConnections WinLog97 PC Program InstallationExternal Power optional Sample Tube Adapter optionalInstrument PC Connection Electrochemical Sensor Installation Completion Check ListInstrument Clock Setting BatteriesFlow Chamber Storage When not UsedOperating Controls Operating InformationOperating Information 3650 Portable O2 Analyzer Preconditioning Sensor Taking MeasurementsAutomatic Data Acquisition Storing Measurements In the InstrumentManual Data Acquisition Storing and Accessing Measurements From the PC Viewing Stored MeasurementsDownloading Stored Values Copying Values Altering the Sampling Point DescriptionsSaving Values Printing ValuesClearing Stored Values Timebase Updating Rate Maximum Samples 10 divisions Monitoring Measurements In Real-TimeOrbisphere Main Menu Basics Options SetupWinlog97 Export Menu O2 Analyzer PC Connection Reviewing Instrument ConfigurationConfiguring the Instrument Automatic Data Acquisition Setting Sampling IntervalsMembrane Selection Select from the PC Selecting Type of CalibrationLocking Out the Instrument’s CAL Button Sensor Calibration Range CheckingEntering a Span Gas Value Change from the PC Dual Use model 3650/113 onlyOrbisphere Pressure Calibration CalibrationsCalibration In a Span Gas Sensor CalibrationCalibration In Line Calibration In Air Calibration Range CheckingAccessories and Attachments Accessories and Attachments 3650 Portable O2 Analyzer Sensor Maintenance and TroubleshootingMaintenance Instrument BatteriesTroubleshooting Serial TestKeyboard Test Display Test Clock SettingsMeasurements View Analog Voltages ViewInstrument Display Options SpecificationsSystem Specifications General Technical DataTheory of Operation Accessories Part ListsInstrument Spare Parts Appendix a Glossary Common UnitsTerms and Definitions Glossary 3650 Portable O2 Analyzer Tables and Illustrations AnnexAnnex 3650 Portable O2 Analyzer User Notes