Leak Test, Sensor Damage | Emerson NGA 2000 TO2 instruction

Model NGA 2000 TO2

Instruction Manual

760008-A September 2001

a.Leak Test

The TO2 Analyzer Module is completely tested at the factory for gas leakage. The user is responsible for testing for leakage only at the inlet and outlet fittings on the rear panel.

CAUTION.

SENSOR DAMAGE

Do not expose the Sensor to pressure in excess of 1.0 psig as this may cause dam- age.

Flow Indicator Method

Supply air or inert gas such as nitrogen, at 1 psig (6.8 hPa), to the analyzer through a flow indicator with a range of 0 to 250 cc/min. Install a shut-off valve at the sample gas outlet. Set the flow rate to 125 cc/min.

Close the outlet shut-off valve and notice that the flow reading drops to zero. If the flow reading does not drop to zero, the system is leaking and must be corrected before the introduction of sample gas or the application of power.

2-6 ELECTRICAL CONNECTIONS

WARNING.

ELECTRICAL SHOCK HAZARD

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

Electrical connections must be made in compliance with National Electri- cal Code (ANSI/NFPA 70) and/or any applicable national or electrical codes.

Two electrical connections are required on the Analyzer Module: POWER and NETWORK (See Figure 2-4). On the Analyzer Module, two NETWORK connectors are available, ei- ther of which is appropriate for: 1) intercon- nection with the Backplane of the Platform or

2)"daisy-chaining" with other NGA 2000 components (A star connection is acceptable for LON lengths under about 10 meters.)

Connect a source of 24 V 5A DC power to the power inlet. Make sure that the ground con- nection is made, and that this is separate from the power return lead. Failure to ensure a good ground may result in random noise and disturbance in the analyzer readings.

Rosemount Analytical Inc. A Division of Emerson Process Management

Installation 2-3

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Emerson NGA 2000 TO2 instruction manual Leak Test, Sensor Damage, Electrical Connections Electrical Shock Hazard

Contents

Model NGA 2000 TO2 Essential Instructions Model NGA 2000 TO2 Table of Contents Material Safety Data Sheet System & Network I/O Module Controls Setup Analyzer Module Interconnection with Instrument Platform List of Illustrations Model NGA 2000 TO2 Definitions Preface Intended USE Statement Safety Summary Model NGA 2000 TO2 Compliances Documentation Glossary of Terms System Softkeys Features Section Description and SpecificationsOverview Typical Applications Trace Oxygen Detector Coulometric Principle Trace Oxygen Analyzer Module Top View General SPECIFICATIONS1Sample Physical Gas Connections Model NGA 2000 TO2 Unpacking Section InstallationElectrolyte Electrolyte Addition GAS Connections GasesGAS Overpressure Sample Flow Leak Test Sensor DamageElectrical Connections Electrical Shock Hazard Analyzer Module Interconnection with Instrument Platform Outline and Mounting Dimensions Back Panel Connections Displays & Operating Keys Operation Analyzer basic controls calibration & setup… Menu Lines & Softkey FunctionalityMeasure Status… Channel Lock… MFG Data Signal on mini-bargraph Entering & Changing VariablesMeasure Back… Measure Mode Display Ppm O2Display Status… Main… Channel BasicCal Module Manufacturing Data Displays Startup & Initialization LCDReset Abort Quick Start Initiate quick startMeasure Status… Back… Power supply voltages… Measure Back… Basic CONTROLS, Setup and StatusAnalyzer Channel Status Display Status… Main… Channel Single Component Display Display Status…Main… Channel BasicCal Multi Component Display Select Status… Tags Off LCDReset Range number Basic Controls and SetupOperation Status Range number Brightness 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 Procedure Air background gas concentration Gas scale factor… Span gas 90.0 ppm Measure Status… Back… Span Calibration Alarms… AlarmsConcentration alarm setup… Measure Back… ClrAlm Alarm generation isRe Ranges… RangesBegin / end of ranges… Range Begin Ppm Measurement Display Configuration Measurement display configuration…Linearization Gas measurement units Concentration MeasurementConcentration measurement… Gas concentration units Sensor model Temperature compensation at span gasClamp low PVA to Ppm to mg/Nm3 conversion factor Flow Measurement Flow measurement…Flow lower limit 400 ml/min Temperature Measurement Temperature measurement… Measure Status… Back…Temperature 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 module Signal value for 0% output Hold output during calibrationHold output during calibration Operation mode Outputs value on analyzer failureOutput number Type of installed serial inter- face Analog Output Updates Per SecondOutput #1 Yes Baud rate 19200 Invert signal Relay Outputs SetupCommunication protocol Choose source module System DIO Choose signal…Function control Input number System Configuration and DIAG- Nostics Diagnostic Menus Load/Save Module Configura- tionAnalyzer Module Diagnostics Security Codes Date and Time System Reset System reset Measure Back…Entering a level locked by security code Model NGA 2000 TO2 Section Maintenance and Service Overview Electrical Shock HazardSensor Caustic Liquid Refilling Sensor Sensor Assembly Electrolyte Replacement Sensor ReplacementSensor Lleak Check Linearization Analyzer and I/O expert controls & setup…Do not tilt Sensor excessively as elec- trolyte may leak Time & Date Linearization… Linearization temperature values…0000 ppm Linearization raw values sensor current… Electronic Components Flow Sensor ReplacementFuses Printed Circuit Boards Troubleshooting Section TroubleshootingFailure to purge down to ppm levels Erratic and very insensitive readings Model NGA 2000 TO2 Section Replacement Parts MatrixTO2 NGA 2000 TO2 Trace Oxygen Analyzer Module Replacement Parts Section Return of Material Customer ServiceReturn of Material Training Model 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 entry Rosemount Warranty Asia Pacific EUROPE, Middle EAST, Africa Latin America