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Bacharach 450 - User Manual

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Environmental Combustion Analyzer
Model 450
Instruction 0024-9400
Operation & Maintenance
Rev. 6 – June 2013
Product Leadership • Training • Service • Reliability

Table of Contents

Questions and Answers

  • R
    Rhonda JonesSep 23, 2025
    Why the sensor does not calibrate properly on my Bacharach Analytical Instruments?
    • J
      Joshua BurgessSep 23, 2025
      If a sensor on your Bacharach Analytical Instruments isn't calibrating properly, it could be due to the wrong calibration gas or insufficient flow being applied to the sensor. Ensure that the calibration setup is correct. Another possibility is a depleted sensor, in which case you should replace the sensor and recalibrate. If the NO sensor doesn’t calibrate, its bias battery may be dead; replace the bias battery and recalibrate.
  • M
    Monica RodriguezAug 23, 2025
    What to do if my Bacharach Analytical Instruments analyzer shows a “Low Battery” message?
    • K
      Kara MillerAug 23, 2025
      If you see a “Low Battery” message on your Bacharach Analytical Instruments analyzer, it means the battery is close to being discharged. Recharge the battery.
  • G
    george28Aug 25, 2025
    How to fix erratic combustion test screen data on Bacharach Analytical Instruments?
    • R
      robertsgregoryAug 26, 2025
      If you're experiencing erratic combustion test screen data on your Bacharach Analytical Instruments, there might be a few reasons. First, check that all sensors are properly installed and their wiring harnesses are correctly connected to the analyzer. Also, check the sensor calibration. Another potential cause is a leak in the gas path. Inspect the tightness of all hose connections on the probe, as well as all internal hose connections within the analyzer.
  • G
    gonzalesstephanieAug 27, 2025
    What to do if the gas pump motor sounds sluggish in my Bacharach Analytical Instruments?
    • G
      Gina CollinsAug 27, 2025
      If the gas pump motor in your Bacharach Analytical Instruments sounds sluggish, it could be due to restricted gas flow. Ensure that the probe tip isn't plugged with dirt and that the Water Trap / Filter Assembly is clean and not saturated with water. Also, verify that the probe’s gas hose is not pinched. Another cause may be a clogged internal particulate filter, in which case you should replace the filter.
  • D
    denise75Aug 27, 2025
    What does “O2 Sensor Error” mean on my Bacharach Analytical Instruments?
    • M
      mollyjuarezAug 27, 2025
      If the “O2 Sensor Error” message appears on your Bacharach Analytical Instruments display, it could be because the analyzer was turned on with the probe sampling flue gas. Remove the probe from the stack and restart the analyzer. Alternatively, the O2 sensor may be depleted, requiring a replacement.
  • R
    Robin WhiteSep 17, 2025
    Why won't the gas pump motor start on my Bacharach Analytical Instruments?
    • J
      Julie CantrellSep 17, 2025
      If the gas pump motor on your Bacharach Analytical Instruments isn't starting, it could be due to a loose pump connector. Remove the analyzer’s top panel and ensure that the pump connector is securely attached to the printed circuit board.
  • R
    Robin WilliamsSep 14, 2025
    What does “Sensor Not Calibrated” mean on my Bacharach Analytical Instruments?
    • K
      Kelli BerrySep 14, 2025
      If the “Sensor Not Calibrated” message appears during calibration on your Bacharach Analytical Instruments, it means the sensor’s output is too low to be calibrated. Replace the sensor.
  • B
    blyonsSep 15, 2025
    Why does the display screen is blank when analyzer is turned on, but pump runs during warm-up cycle on Bacharach Analytical Instruments?
    • D
      daniel67Sep 15, 2025
      If your Bacharach Analytical Instruments analyzer's display screen is blank but the pump runs during warm-up, the microprocessor may need a reset. Remove the analyzer’s top panel and press the Reset button. Another possible cause is loose display connector(s). Remove the analyzer’s top panel and ensure that all display-panel connectors are properly attached to the printed circuit boards.
  • B
    Barry FlowersSep 6, 2025
    What does “CO-LO Sensor Error” mean on my Bacharach Analytical Instruments?
    • P
      Patrick RothSep 6, 2025
      If the “CO-LO Sensor Error” message appears on your Bacharach Analytical Instruments display, it might be because the analyzer was turned on with the probe sampling flue gas. Remove the probe from the stack and restart the analyzer. Another possibility is that the CO-LO sensor didn't zero at start up. Turn the analyzer off and then on to re-zero all sensors; if the error continues, replace the sensor.
  • H
    Holly NorrisSep 3, 2025
    What does “HC Sensor Error” mean on my Bacharach Analytical Instruments?
    • M
      Meghan ThomasSep 3, 2025
      If the “HC Sensor Error” message appears on your Bacharach Analytical Instruments display, the combustibles sensor may not be plugged in or is defective. Install or replace the sensor.

Summary

Environmental Combustion Analyzer Model 450

Instruction Manual

Operation and Maintenance guide for the ECA 450 environmental combustion analyzer.

Warranty Information

Introduction

Features

Technical Data

Front Panel Connections and Controls

Identifies and describes all ports and physical controls on the analyzer's front panel.

Front Panel Keypad Controls

Details the function of each button on the analyzer's keypad for user interface.

Operation

Turning On the Analyzer

Step-by-step guide for powering on the ECA 450 and its warm-up sequence.

Turning Off the Analyzer

Performing a Combustion Test

Detailed procedure for conducting a combustion test with the ECA 450.

Downloading Data to a Personal Computer

Guide for transferring test data from the analyzer to a PC.

Data Logging

Primary Air Temperature Measurement

Setting Up the Analyzer

Calibration

Initial Sensor Check

Procedure to verify sensor functionality and ambient conditions before calibration.

Calibration Fixtures

Starting and Ending a Calibration Procedure

Calibrate Pressure Sensor

Procedure to calibrate the pressure sensor against a known value.

Calibrate T-Stack (Stack Temperature) Channel

Steps to zero and span the stack temperature sensor.

Calibrate T-Air (Ambient Temperature) Channel

Steps to zero and span the ambient air temperature sensor.

Calibrate HC Sensor

Procedure to calibrate the optional combustibles (HC) sensor.

Calibrate CO-LO Sensor

Procedure to calibrate the low-range Carbon Monoxide sensor.

Calibrate SO2 Sensor

Procedure to calibrate the optional Sulfur Dioxide sensor.

Calibrate NO Sensor

Procedure to calibrate the optional Nitric Oxide sensor.

Calibrate NO2 Sensor

Procedure to calibrate the optional Nitrogen Dioxide sensor.

Calibrate CO-HI Sensor

Procedure to calibrate the high-range Carbon Monoxide sensor.

Maintenance

Battery Charging

Instructions for recharging the analyzer's internal battery pack.

Water-Trap; Filter Assembly

Sensor Replacement

General guide to replacing various sensors in the analyzer.

O2, CO, NO, NO2, & SO2 Sensor Replacement

Nitric Oxide Sensor Battery Replacement

HC Sensor Replacement

Resetting the Microprocessor

Troubleshooting

Analyzer Repair

Problem Messages Displayed After Warm-Up

Explains error messages shown after the analyzer's warm-up sequence.

Error Symbols

Troubleshooting Guide

A table listing common symptoms and their probable causes and remedies.

Bacharach 450 Specifications

General IconGeneral
Measurement Range (LEL)0-100% LEL
Measurement Range (CO)0-1000 ppm
Resolution1 ppm
Power Supply (LEL)4 x AA alkaline batteries
Gases MeasuredCombustible gases, Carbon Monoxide
Power4 x AA alkaline batteries
Operating Temperature32° to 104°F (0° to 40°C)
Power Supply (CO)4 x AA alkaline batteries

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