Bacharach 450 User Manual (English)

Questions and Answers:

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.
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.
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.
A
Amanda StantonSep 8, 2025
What does “SO2 Sensor Error” mean on my Bacharach Analytical Instruments?
- C
  Carla MelendezSep 9, 2025
  If the “SO2 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. If the error persists, the SO 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
Morgan HillSep 10, 2025
What does “Pressure Sens. Error” mean on my Bacharach Analytical Instruments?

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