Bacharach 450 User Manual (English)

Questions and Answers:

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Jimmy BeckerAug 22, 2025
Why is my Bacharach Analytical Instruments analyzer completely nonfunctional?
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  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.
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Monica RodriguezAug 23, 2025
What to do if my Bacharach Analytical Instruments analyzer shows a “Low Battery” message?
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  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.
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george28Aug 25, 2025
How to fix erratic combustion test screen data on Bacharach Analytical Instruments?
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  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.
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gonzalesstephanieAug 27, 2025
What to do if the gas pump motor sounds sluggish in my Bacharach Analytical Instruments?
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  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.
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denise75Aug 27, 2025
What does “O2 Sensor Error” mean on my Bacharach Analytical Instruments?
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  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.
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Howard CraigAug 28, 2025
What does “TS Sensor Error” mean on my Bacharach Analytical Instruments?
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  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.
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Samuel HernandezAug 30, 2025
Why won't my Bacharach Analytical Instruments respond when I press a key?
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  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.
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Miguel TaylorAug 31, 2025
What does “TA Sensor Error” mean on my Bacharach Analytical Instruments?
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  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.
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dreedSep 2, 2025
What does “NO2 Sensor Error” mean on my Bacharach Analytical Instruments?
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  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.
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Holly NorrisSep 3, 2025
What does “HC Sensor Error” mean on my Bacharach Analytical Instruments?
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  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.

Bacharach 450 Specifications

General

Measurement Range (LEL)	0-100% LEL
Measurement Range (CO)	0-1000 ppm
Resolution	1 ppm
Power Supply (LEL)	4 x AA alkaline batteries
Gases Measured	Combustible gases, Carbon Monoxide
Power	4 x AA alkaline batteries
Operating Temperature	32° to 104°F (0° to 40°C)
Power Supply (CO)	4 x AA alkaline batteries