horiba LAQUA F-71G User Manual (English)

Questions and Answers:

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Micheal HaleAug 19, 2025
What to do if Horiba Measuring Instruments shows unstable reading error?
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  josephpattersonAug 19, 2025
  If you are getting unstable readings on your Horiba Measuring Instruments, it could be due to several factors. The sample solution might be pure water or have low conductivity, or the pH concentration or temperature might be changing. Try pressing the MEAS key again while “HOLD” is blinking or lit to measure the sample using instantaneous value measurement. Also, the electrode could be dirty, cracked, or have a responsive glass membrane that has been dry for too long. Try washing or replacing the electrode. If the membrane has been dry, soak it in pure deionized water for 24 hours. Finally, ensure the sample solution temperature is stable before measuring.
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natashamillerAug 22, 2025
What to do if horiba LAQUA F-71G shows span calibration error?
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  Justin PierceAug 22, 2025
  If you're encountering a span calibration error on your Horiba Measuring Instruments, several issues could be the cause. First, the electrode might be dirty or cracked, requiring washing or replacement. Second, the calibration process might not have been performed correctly, so try redoing it. Third, there might be a problem with the standard solution, so prepare new solutions. Fourth, make sure the electrode is correctly connected and immersed at least 3 cm beyond the electrode tip.
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tsmithAug 23, 2025
What to do if Horiba Measuring Instruments shows zero calibration error?
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  Victoria BowmanAug 23, 2025
  If your Horiba Measuring Instruments is showing a zero calibration error, there are several potential causes. The electrode might be dirty or cracked, which means you should wash or replace it. The standard solution concentration could be fluctuating, so replace the internal solution in the reference electrode. Also, make sure the electrode is connected correctly and is immersed at least 3 cm beyond the electrode tip. Finally, the standard buffers could be problematic, so try using a new standard solution.
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Brent JohnsonAug 26, 2025
Why does the indicated value fluctuate on horiba LAQUA F-71G?
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  xriveraAug 26, 2025
  If the indicated value is fluctuating on your Horiba Measuring Instruments, it could be due to a few reasons. The responsive membrane might be dry or dirty, so try washing it. The membrane could also be damaged or worn out, requiring replacement of the electrode. There might be air bubbles on the electrode; shake it to remove them. Ensure there's enough standard solution remaining in the electrode, and that you're using the correct standard solution. Fill the electrode with new standard solution, as noted in the operation manual of the electrode.
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Alexander LopezAug 28, 2025
What to do if horiba LAQUA F-71G shows buffer uncertain error?
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  Caitlyn ArcherAug 28, 2025
  If your Horiba Measuring Instruments displays a 'Buffer uncertain' error, it may be caused by a problem with the standard solution. Try preparing a new standard solution. It could also be due to a mismatch in the regulation type (NIST, USA) of the standard solutions between the settings and the actual solutions used. If the responsive membrane is dry or dirty, clean it and soak it in pure water for 24 hours. Also, check if the reference internal solution is poor or dirty, and replace it if necessary. Finally, the responsive membrane might be damaged or worn out, requiring electrode replacement.
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Joshua MartinezAug 29, 2025
Why does the measured value blink on horiba LAQUA F-71G Measuring Instruments?
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  wbartonAug 29, 2025
  If the measured value blinks on your Horiba Measuring Instruments, it could be because the sample is inappropriate; use a sample within the measurement range. Ensure the liquid junction is immersed in the sample, up to 3 cm from its tip. Another cause might be a broken electrode cable, which would require replacing the electrode. Also, calibration could be unperformed or incorrect; perform calibration correctly.
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joycefarrellSep 1, 2025
Why is the response slow on horiba LAQUA F-71G?
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  Barbara VaughanSep 1, 2025
  A slow response on your Horiba Measuring Instruments could be due to the properties of the sample solution. The responsive membrane might need washing. If it's damaged or worn out, replace the electrode. Finally, ensure the electrode is filled with new standard solution, as noted in the operation manual of the electrode.
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James JohnsonSep 2, 2025
Why are measurements not repeatable on Horiba Measuring Instruments?
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  hooperstevenSep 3, 2025
  If measurements are not repeatable with your Horiba Measuring Instruments, it could be due to changes in the sample's pH or other properties over time. The responsive membrane might be dry or dirty, so wash it. The internal solution of the electrode could be running out or contaminated, so replace it with a new one. Also, the responsive membrane might be cracked or worn out, requiring electrode replacement.
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Crystal HudsonSep 4, 2025
What to do if Horiba Measuring Instruments indicated value does not change?
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  Natasha HolderSep 4, 2025
  If your Horiba Measuring Instruments isn't showing any change in the indicated value or has no response, first disconnect and reconnect the AC adapter, and press the ON/OFF key 10 seconds later. The electrode connector might not be attached correctly; turn the power OFF, then turn it back ON again. The electrode could be defective, especially if the responsive membrane is cracked, so replace it.
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Cathy McphersonSep 6, 2025
Why is the temperature display blinking on horiba LAQUA F-71G Measuring Instruments?
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  jessicaolsonSep 7, 2025
  If the temperature display is blinking on your Horiba Measuring Instruments, it could be because the sample temperature is outside the display range; adjust it within the measurement range. Another cause might be a broken or shorted internal thermistor connection in the electrode; check the resistance of the temperature sensor connector and replace the electrode if it's 50 kΩ or more at room temperature. Also, ensure the temperature connector is firmly inserted. Finally, the settings of the temperature calibration might be failing; initialize the settings.