horiba APMA-370 User Manual (English)

Questions and Answers:

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Susan MeadowsAug 18, 2025
Why is the output signal level too low on my horiba APMA-370?
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  Christine FarmerAug 18, 2025
  The output signal level might be too low on your Horiba Measuring Instruments due to several reasons: * The range may not be set properly. You can fix this by setting the range correctly or selecting the automatic range. * The zero calibration might not be accurate enough. Perform the calibration again. * The span calibration might not be accurate enough. Perform the calibration again. * The catalyst may have deteriorated, in which case you should replace the catalyst pipe. * There might be pressure loss at the sample inlet or outlet. Check the piping for clogging and rectify it. * The filter could be contaminated, so replace it. The filter element should be replaced every 2 weeks.
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Michelle ChavezAug 20, 2025
Why is the output signal level too high on my horiba APMA-370?
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  uarroyoAug 20, 2025
  The output signal level might be too high because: * The range is not set properly. To fix this, set the range properly or select the automatic range. * The zero calibration is not accurate enough, so you should perform the calibration again. * The span calibration is also not accurate enough, so you should perform that calibration again as well.
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pam78Aug 23, 2025
What to do if readings are not stable enough on horiba APMA-370 Measuring Instruments?
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  Thomas WilliamsAug 23, 2025
  If the readings on your Horiba Measuring Instruments are not stable enough, it could be due to: * An unstable flow rate. Check the filter and replace it if it's contaminated. The filter element should be replaced every 2 weeks. * Check the pump and diaphragm. If they have been used exceeding their replacement time, replace them.
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Donna MejiaAug 26, 2025
How to fix span calibration issues on horiba Measuring Instruments?
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  Frank WilliamsAug 26, 2025
  Span calibration issues may arise in Horiba Measuring Instruments due to: * An unstable measured value. Perform the span calibration again. * An incorrect span gas concentration. Check the span gas concentration and perform the span calibration with gas of the proper concentration. * The span gas concentration being set improperly. Set the span gas concentration properly.
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Clifford JenkinsAug 28, 2025
What to do if there is no output signal available on horiba APMA-370?
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  amy32Aug 28, 2025
  If there is no output signal available, it may be due to: * A flow rate that is too low. Check the measured gas line and calibration gas line for disconnected piping. * A disconnected connector. Connect it properly.
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Diane FreemanAug 30, 2025
How to resolve zero calibration issues on horiba APMA-370 Measuring Instruments?
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  Alison JohnsonAug 30, 2025
  Zero calibration issues on your Horiba Measuring Instruments may occur because: * The measured value is not stable. Perform the zero calibration again. * Gas other than the zero gas has been supplied during the zero calibration. Supply the zero gas.
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Tina ThomasSep 2, 2025
How to solve catalyzer temperature problems on horiba Measuring Instruments?
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  Aaron MooreSep 2, 2025
  Catalyzer temperature issues on Horiba Measuring Instruments can be caused by: * The instrument not being sufficiently warmed up. Warm up the instrument. * The ambient temperature deviating from the specified range (0°C to 40°C). Allow the instrument to stand for a while in an environment of temperature within the specified ambient temperature range.
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mhughesSep 4, 2025
How to address high noise level issues in horiba APMA-370?
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  wademanuelSep 4, 2025
  A high noise level in Horiba Measuring Instruments can occur because: * Condensation occurs throughout the instrument. Allow the instrument to stand for a while in an environment of stable temperature within the operating temperature range until condensation disappears. * Significant vibrations occur in the installation site. Change the installation site.
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Stephen FarmerSep 7, 2025
What causes BATT Battery error in horiba Measuring Instruments and how to fix it?
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  Johnny MurphySep 7, 2025
  The BATT: Battery error in Horiba Measuring Instruments indicates that the battery has reached the end of its service life (about 3 years). Replace the battery. If the settings return to the default value after the battery has been replaced, set the current time and AIC start time again.
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Brenda CortezSep 9, 2025
How to fix CF alarm issues on horiba APMA-370 Measuring Instruments?
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  villaselenaSep 9, 2025
  The CF alarm on Horiba Measuring Instruments can be triggered by: * The CF not being connected. Insert a CF that has sufficient free space. * The CF having no free space. Format the CF or insert a CF that has sufficient free space.

horiba APMA-370 Specifications

General

Measurement Method	Chemiluminescence
Linearity	±1% of full scale
Resolution	0.1 ppm
Sample Gas Flow Rate	1 L/min
Power Supply	AC100V-240V, 50/60 Hz
Dimensions	400 x 300 x 200 mm
Measurement Principle	Chemiluminescence
Sampling Flow Rate	1 L/min
Output	Digital output (RS-232C)
Dimensions (Alt)	400 x 300 x 200 mm
Weight (Alt)	10 kg