Emerson NGA 2000 TO2 Section Maintenance and Service, Overview Electrical Shock Hazard

Page 61

Model NGA 2000 TO2

Instruction Manual

760008-A September 2001

SECTION 4

MAINTENANCE AND SERVICE

4-1 OVERVIEW

DANGER.

ELECTRICAL SHOCK HAZARD

Operate this equipment only when covers are secured. Servicing requires access to live parts which can cause death or seri- ous injury. Refer servicing to qualified personnel. For safety and proper perform- ance, this module must be connected to a properly grounded three-wire source of electrical power.

DANGER.

POSSIBLE EXPLOSION HAZARD

This equipment is not designed and should not be used in the analysis of flammable samples. Use of this equipment in this way could result in explosion and death.

The TO2 Analyzer Module requires very little maintenance during normal operation.

The sensor in the TO2 utilizes a liquid elec- trolyte. When measuring dry gases, it may be necessary to replenish the liquid by adding distilled or deionized water.

The sensor is designed to hold at least 100 cc of electrolyte. Typically, bone dry sample gas can extract approximately 5-10 cc of water per month from the sensor. It is recommended to check the electrolyte level every 3-4 months to assure that the electrolyte level is within the acceptable operating limits as indicated by the label on the reservoir section of the sensor.

The TO2 analyzer module is equipped with a low electrolyte alarm which indicates when replenishment of the sensor is required. Please refer to the Platform manual for details on configuring alarms.

WARNING.

HIGH PRESSURE GAS CYLINDERS

This analyzer requires use of pressurized gas. See General Precautions for Handling and Storing High Pressure Cylinders page P-3.

WARNING.

PARTS INTEGRITY

Tampering or unauthorized substitution of components may adversely affect safety of this product. Use only factory docu- mented components for repair.

4-2 SENSOR

CAUTION.

CAUSTIC LIQUID

Electrolyte is a caustic solution. Review the Material Safety Data Sheet in the rear of this manual.

Rosemount Analytical Inc. A Division of Emerson Process Management

Maintenance and Service 4-1

Image 61

Contents Model NGA 2000 TO2 Essential Instructions Model NGA 2000 TO2 Table of ContentsMaterial Safety Data Sheet System & Network I/O Module Controls SetupAnalyzer Module Interconnection with Instrument Platform List of IllustrationsModel NGA 2000 TO2 Definitions Preface Intended USE StatementSafety Summary Model NGA 2000 TO2 Compliances DocumentationGlossary of Terms System SoftkeysFeatures Section Description and SpecificationsOverview Typical ApplicationsTrace Oxygen Detector Coulometric Principle Trace Oxygen Analyzer Module Top View General SPECIFICATIONS1Sample PhysicalGas Connections Model NGA 2000 TO2 Unpacking Section InstallationElectrolyte Electrolyte AdditionGAS Connections GasesGAS Overpressure Sample FlowSensor Damage Leak TestElectrical Connections Electrical Shock Hazard Analyzer Module Interconnection with Instrument Platform Outline and Mounting Dimensions Back Panel Connections Displays & Operating Keys OperationMenu Lines & Softkey Functionality Analyzer basic controls calibration & setup…Measure Status… Channel Lock… MFG Data Entering & Changing Variables Signal on mini-bargraphMeasure Back… Ppm O2 Measure Mode DisplayDisplay Status… Main… Channel BasicCal Module Manufacturing Data Displays Startup & Initialization LCDReset AbortInitiate quick start Quick StartMeasure Status… Back… Power supply voltages… Measure Back… Basic CONTROLS, Setup and StatusAnalyzer Channel Status Display Status… Main… ChannelDisplay Status… Single Component DisplayMain… Channel BasicCal Multi Component Display Select Status… Tags Off LCDResetRange number Basic Controls and SetupOperation Status Range numberBrightness and Contrast Display ControlsDisplay controls… Brightness 70 %Analyzer and I/O, expert controls & setup… Expert Controls and SetupAnalyzer module controls… Measure Channel Back…Gas Scale Factor Calibration ProcedureAir background gas concentration Gas scale factor…Span gas 90.0 ppm Measure Status… Back… Span CalibrationAlarms… AlarmsConcentration alarm setup… Measure Back… ClrAlm Alarm generation isReRanges… RangesBegin / end of ranges… Range Begin PpmMeasurement display configuration… Measurement Display ConfigurationLinearization Gas measurement units Concentration MeasurementConcentration measurement… Gas concentration unitsSensor model Temperature compensation at span gasClamp low PVA to Ppm to mg/Nm3 conversion factorFlow measurement… Flow MeasurementFlow lower limit 400 ml/min Temperature measurement… Measure Status… Back… Temperature MeasurementTemperature measurement units System & network I/O module controls… System & Network I/O Module CON Trols Setup37.50 ppm System SIO module…System SIO Analog output setup…Choose signal Analog Output SetupSelect analog output number Choose the analyzer moduleHold output during calibration Signal value for 0% outputHold output during calibration Outputs value on analyzer failure Operation modeOutput number Type of installed serial inter- face Analog Output Updates Per SecondOutput #1 Yes Baud rate 19200Invert signal Relay Outputs SetupCommunication protocol Choose source moduleSystem DIO Choose signal…Function control Input numberSystem Configuration and DIAG- Nostics Load/Save Module Configura- tion Diagnostic MenusAnalyzer Module Diagnostics Security Codes Date and TimeSystem reset Measure Back… System ResetEntering a level locked by security code Model NGA 2000 TO2 Overview Electrical Shock Hazard Section Maintenance and ServiceSensor Caustic Liquid Refilling Sensor Sensor AssemblySensor Replacement Electrolyte ReplacementSensor Lleak Check Linearization Analyzer and I/O expert controls & setup…Do not tilt Sensor excessively as elec- trolyte may leak Time & DateLinearization… Linearization temperature values…0000 ppm Linearization raw values sensor current…Electronic Components Flow Sensor ReplacementFuses Printed Circuit BoardsTroubleshooting Section TroubleshootingFailure to purge down to ppm levels Erratic and very insensitive readingsModel NGA 2000 TO2 Matrix Section Replacement PartsTO2 NGA 2000 TO2 Trace Oxygen Analyzer Module Replacement Parts Section Return of Material Customer ServiceReturn of Material TrainingModel NGA 2000 TO2 Section Index Model NGA 2000 TO2 Product ELECTROLYTE1 Precautions to be taken in handling Emergency & first aid proceduresOther precautions Threshold limit value Routes of entryRosemount Warranty Asia Pacific EUROPE, Middle EAST, Africa Latin America