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Hanna Instruments HI8424 - User Manual

Hanna Instruments HI8424
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Instruction Manual
HI8424
Portable pH/mV/°C Meter
www.hannainst.com

Questions and Answers

  • L
    Leslie WilliamsAug 4, 2025
    What to do if my Hanna Instruments Measuring Instruments shows a blinking battery symbol?
    • K
      Karina MasseyAug 4, 2025
      If your Hanna Instruments Measuring Instruments unit is displaying a blinking battery symbol, this indicates a low battery level. Replace the battery to resolve this issue.
  • N
    nicolelewisAug 10, 2025
    What to do if Hanna Instruments Measuring Instruments shows “WRONG” & blinking dashes?
    • S
      Scott TorresAug 10, 2025
      If your Hanna Instruments Measuring Instruments is displaying “WRONG” & blinking dashes, this indicates a calibration error. Check your buffer solution or replace the pH electrode.
  • J
    John MurphyAug 16, 2025
    Why is my Hanna Instruments Measuring Instruments reading fluctuating up and down (noise)?
    • L
      Lauren WarrenAug 16, 2025
      If the reading on your Hanna Instruments Measuring Instruments is fluctuating up and down, it could be due to a clogged or dirty junction, or a low electrolyte level in refillable electrodes. To resolve this, soak the electrode tip in warm HI7082 solution for one hour, then rinse it with distilled water. If necessary, refill with fresh electrolyte.
  • M
    Maria MccoyAug 23, 2025
    How to fix slow response or excessive drift in Hanna Instruments Measuring Instruments?
    • W
      Wanda McknightAug 23, 2025
      If you're experiencing a slow response or excessive drift with your Hanna Instruments Measuring Instruments, it might be due to a dirty pH electrode. Soak the electrode tip in HI7061 solution for 30 minutes to clean it.
  • K
    Kayla ReedAug 28, 2025
    What does “Clr” message mean on Hanna Instruments Measuring Instruments?
    • S
      Susan QuinnAug 28, 2025
      The “Clr” message on your Hanna Instruments Measuring Instruments indicates that default pH calibration values have been loaded. Perform a pH calibration to resolve this.

Summary

Preliminary Examination

General Description

Functional Description

Specifications

Operational Guide

Initial Preparation

Steps for preparing the pH meter before use, including electrode connection and power on.

pH Measurements

Procedure for taking pH measurements, including sample immersion and stability monitoring.

Temperature Compensation

Explanation of automatic and manual temperature compensation for accurate pH readings.

ORP Measurements

Instructions for performing Oxidation Reduction Potential (ORP) measurements with the meter.

Temperature Measurements

Guide on how to perform temperature measurements using the meter and its probe.

pH Calibration

Preparation

Instructions for preparing buffer solutions and beakers for accurate pH calibration.

Procedure

Step-by-step guide for calibrating the pH meter using buffer solutions.

pH Buffer Temperature Dependence

Menu Selection

mV Calibration

Temperature Calibration

Battery Replacement

LCD Messages and Troubleshooting

Tags and Symbols

Explanation of various tags and symbols displayed on the LCD screen during operation.

Troubleshooting

Electrode Conditioning & Maintenance

Preparation Procedure

Steps for preparing the pH electrode before use, including handling deposits and bubbles.

Measurement

Instructions for correctly measuring samples with the pH electrode, including rinsing.

Storage Procedure

Guidelines for proper electrode storage to prevent clogging and ensure quick response.

Periodic Maintenance

Checks and maintenance for the electrode and cable, ensuring good connection and integrity.

Cleaning Procedure

Methods for cleaning the electrode using various solutions for different contaminations.

Accessories

pH Electrode Application Reference Guide

Recommendations for Users

Warranty

Hanna Instruments HI8424 Specifications

General IconGeneral
pH Range0.00 to 14.00 pH
pH Resolution0.01 pH
pH Accuracy±0.01 pH
ORP Resolution1 mV
mV Resolution1 mV
ORP Accuracy±1 mV
mV Accuracy±1 mV
Temperature Resolution0.1°C (0.1°F)
DisplayLCD
TypepH/ORP Meter
Temperature Accuracy±0.5 °C
Calibration1 or 2 points
Temperature CompensationAutomatic
Battery Type1.5V AA (4)
Battery LifeApproximately 200 hours of continuous use
ElectrodeHI1230B pH electrode
ORP Range±2000 mV
mV Range±2000 mV
Weight400 g

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