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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

  • D
    Donna GreenSep 7, 2025
    What does “CO-HI Sensor Error” mean on my Bacharach Analytical Instruments?
    • M
      Maria PerrySep 7, 2025
      If the “CO-HI Sensor Error” message appears on your Bacharach Analytical Instruments display, it could mean the analyzer was turned on with the probe sampling flue gas. Remove the probe from the stack and restart. If the error persists, the CO-HI sensor might not have zeroed at start up. Turn the analyzer off and then on to re-zero all sensors; if the error persists, replace the sensor.
  • J
    Jimmy BeckerAug 22, 2025
    Why is my Bacharach Analytical Instruments analyzer completely nonfunctional?
    • J
      James OrtegaAug 22, 2025
      Your Bacharach Analytical Instruments analyzer might not be turning on due to a dead battery pack. Try recharging the battery pack. Alternatively, the battery connector might be loose; in this case, remove the analyzer’s top panel and ensure the battery connector is securely attached to the printed circuit board. Another possibility is that the microprocessor needs a reset; remove the analyzer’s top panel and press the Reset button.
  • D
    David ScottSep 4, 2025
    What does “NOXIDE Sensor Error” mean on my Bacharach Analytical Instruments?
    • C
      Courtney MccartySep 5, 2025
      If the “NOXIDE Sensor Error” message appears on your Bacharach Analytical Instruments display, it may be because the analyzer was turned on with the probe sampling flue gas. Remove the probe from the stack and restart the analyzer. If that doesn't work, the NO sensor might not have zeroed at start up. Turn the analyzer off and then on to re-zero all sensors; if the error persists, 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.
  • D
    dreedSep 2, 2025
    What does “NO2 Sensor Error” mean on my Bacharach Analytical Instruments?
    • D
      Denise WileySep 2, 2025
      If you are seeing a “NO2 Sensor Error” message on your Bacharach Analytical Instruments analyzer, it may be because the analyzer was turned on with the probe sampling flue gas. Try removing the probe from the stack and restarting the analyzer. If that doesn't work, the NO sensor might not have zeroed at start up. Turn the analyzer off and then on to re-zero all sensors; if the error persists, replace the sensor.
  • M
    Miguel TaylorAug 31, 2025
    What does “TA Sensor Error” mean on my Bacharach Analytical Instruments?
    • R
      Robert JeffersonSep 1, 2025
      If the “TA Sensor Error” message appears on your Bacharach Analytical Instruments, it could be because the analyzer was turned on with its primary air thermocouple measuring a temperature outside the range of –4 to 212 °F (–20 to 100 °C). Ensure the thermocouple is sampling ambient room temperature and restart the analyzer. Alternatively, the thermocouple might be defective and needs replacement.
  • S
    Samuel HernandezAug 30, 2025
    Why won't my Bacharach Analytical Instruments respond when I press a key?
    • M
      Melissa JonesAug 30, 2025
      If your Bacharach Analytical Instruments analyzer isn't responding to key presses, the microprocessor might need a reset. Remove the analyzer’s top panel and press the Reset button. Another possibility is a defective membrane switch, which requires returning the unit to Bacharach for replacement.
  • H
    Howard CraigAug 28, 2025
    What does “TS Sensor Error” mean on my Bacharach Analytical Instruments?
    • A
      Angela MartinAug 29, 2025
      The “TS Sensor Error” message on your Bacharach Analytical Instruments indicates a problem with the stack thermocouple. First, ensure the probe’s stack thermocouple is properly connected to the analyzer’s T-STACK connector. Another possible reason is that the analyzer was turned on with the probe in the stack. Remove the probe, allow it to cool to room temperature, and then restart. Finally, the thermocouple itself may be defective, requiring you to replace the probe assembly.
  • 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.
  • 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.

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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