Hanna Instruments pHep+ HI98108 - User Manual

Troubleshooting
• In calibration mode, the “--- Err” message is displayed if the reading is
outside accepted range or buffer solution is not recognized.
• If the probe is not in buffer solution, “pH 14.00” or “pH 0.00” is displayed
blinking.
• If measured temperature is outside accepted range, “0 °C” or “50 °C” is
displayed blinking.
Care & Maintenance
Please read the information below to ensure highest possible accuracy.
• Fresh buffers should be used for each calibration, once the sachets are open
the buffer value can change over time.
• If the measurements are taken sucessively, rinse the probe thoroughly in
purified water to eliminate cross-contamination.
• When not in use, add a few drops of storage solution to the protective cap to
keep the junction hydrated. If storage solution is not available, pH 4.01 or pH
7.01 buffer can be used.
• For improved accuracy, a two-point calibration is recommended.
• When dirty, the junction can be pulled out to expose a fresh section. Pull
out 3 mm (1/8”) of the cloth, making sure that the reference compartment
remains covered. This procedure can be repeated approximately 9 times,
renewing the tester’s life.
• If the electrode or junction is dirty, soak the tip in HI7061 General purpose
cleaning solution for 30 minutes. Rinse with distilled water and follow
cleaning procedure.
Film deposits and other impurities that accumulate with use must be removed
periodically off the membrane or junction.
• General: Soak in HI7061 General cleaning solution for approximately 1 hour.
• Protein: Soak in HI7073 Protein cleaning solution for 15 minutes.
• Inorganic: Soak in HI7074 Inorganic cleaning solution for 15 minutes.
• Oil & grease: Rinse with HI7077 Oil and grease cleaning solution.
Note: After performing any of the cleaning procedures rinse the electrode
thoroughly with distilled water, and soak in HI70300 Storage solution for
at least 1 hour before taking measurements.
Battery Replacement
Battery life percentage indicator is displayed at power on. If the battery
level drops below 10%, the battery symbol starts blinking. If the battery is
discharged, “dEAd bAtt” is displayed and then the tester turns off.
0
8
0
8
To change the CR2032 Lithium-ion battery, turn the battery cover located on the
back of the tester counterclockwise to unlock. Remove the cover and replace the
battery with positive (+) side facing out.
Note: Only use the battery type specified in the manual. Old batteries
should be disposed in accordance with local regulations.
Accessories
pH Buffer Solution
HI70004P pH 4.01 buffer solution, 20 mL sachet (25 pcs.)
HI70007P pH 7.01 buffer solution, 20 mL sachet (25 pcs.)
HI70010P pH 10.01 buffer solution, 20 mL sachet (25 pcs.)
HI77400P pH 4.01 & 7.01 buffer solution, 20 mL sachet (10 pcs., 5 each)
HI770710P pH 10.01 & 7.01 buffer solution, 20 mL sachet (10 pcs., 5 each)
Electrode Cleaning Solution
HI7061M General purpose cleaning solution, 230 mL
HI7073 Protein cleaning solution
HI7074 Inorganic cleaning solution
HI7077 Oil and Grease cleaning solution
Electrode Storage Solution
HI70300M Electrode storage solution, 230 mL
Certification
All Hanna Instruments conform to the CE European Directives.
Disposal of Electrical & Electronic Equipment. The product
should not be treated as household waste. Instead hand it over
to the appropriate collection point for the recycling of electrical
and electronic equipment which will conserve natural resources.
Disposal of waste batteries. This product contains batteries, do
not dispose of them with other household waste. Hand them over
to the appropriate collection point for recycling.
Ensuring proper product and battery disposal prevents potential negative
consequences for the environment and human health. For more information,
contact your city, your local household waste disposal service, the place of
purchase or go to www.hannainst.com.
Recommendations for Users
Before using this product, make sure it is entirely suitable for your specific
application and for the environment in which it is used. Avoid touching the
electrode area. Any variation introduced by the user to the supplied equipment
may degrade the tester’s performance. For yours and the tester’s safety do not
use or store the tester in hazardous environments.
Warranty
This tester is warranted for a period of one year against defects in workmanship
and materials when used for their intended purpose and maintained according
to instructions. This warranty is limited to repair or replacement free of charge.
Damage due to accidents, misuse, tampering or lack of prescribed maintenance
is not covered. If service is required, contact your local Hanna Instruments
Office. If under warranty, report the model number, date of purchase, serial
number and the nature of the problem.
If the repair is not covered by the warranty, you will be notified of the charges
incurred. If the instrument is to be returned to Hanna Instruments, first obtain
a Returned Goods Authorization (RGA) number from the Technical Service
department and then send it with shipping costs prepaid. When shipping any
instrument, make sure it is properly packaged for complete protection.
Hanna Instruments reserves the right to modify the design, construction, or
appearance of its products without advance notice.
All rights are reserved. Reproduction in whole or in part is prohibited without the written
consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island,
02895, USA.
IST98108N 12/19
RoHS
compliant
HI98108
Pocket-sized pH Tester
INSTRUCTION MANUAL

Summary

Preliminary Examination

General Description & Intended Use

Compact, waterproof pH tester for labs/industry with two-button operation and auto-temp compensation.

Specifications

Functional Description & LCD Display

LCD Display Elements

Details stability tag, battery indicators, and measured values (pH, temperature).

Preparation

Electrode Preparation

Instructions for rinsing, blotting, and soaking the electrode to ensure proper function and longevity.

Storage

Electrode Storage

How to keep the electrode moist using storage solution or buffer to maintain response.

Operation

Turning Tester On;Off

How to power the tester on and off using the ON/OFF button.

Calibration Mode

Accessing calibration mode by pressing the CAL button.

Setup Menu

Navigating setup for temperature units (°C/°F) and auto-off time.

Calibration & Measurement

Calibration Recommendations

Recommends frequent calibration for accuracy, especially after testing aggressive samples.

One-Point Calibration

Step-by-step guide for calibrating the tester with a single pH buffer solution.

Two-Point Calibration

Step-by-step guide for calibrating with two pH buffer solutions.

Three-Point Calibration

Step-by-step guide for calibrating with three pH buffer solutions.

Clear Calibration

Resets user calibration to factory defaults by pressing ON/OFF in calibration mode.

Measurement Procedure

How to take a pH measurement by immersing the electrode and waiting for stability.

Troubleshooting

Error Messages

Explains common error messages like "--- Err", blinking values, and their causes.

Care & Maintenance

Buffer Usage & Rinsing

Advises using fresh buffers, rinsing probe between measurements to prevent cross-contamination.

Electrode Junction Maintenance

Tips on keeping the junction hydrated and extending electrode life by pulling out the cloth.

Cleaning Solutions

Lists specific Hanna cleaning solutions for general, protein, and oil/grease contamination.

Battery Replacement

Battery Indicator & Replacement

Explains battery status indicators and how to replace the CR2032 battery.

Accessories

pH Buffer Solutions

Lists various pH buffer solutions offered by Hanna Instruments.

Electrode Cleaning Solutions

Lists Hanna's electrode cleaning solutions for different types of contamination.

Electrode Storage Solution

Lists Hanna's electrode storage solution.

Certification

Recommendations for Users

Warranty

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The Hanna Instruments pHep+ HI98108 is a compact, pocket-sized, and waterproof pH tester designed for use in laboratories and various industrial applications. Its primary function is to accurately measure pH levels and temperature, providing users with reliable data for their specific needs.

Function Description

The pHep+ HI98108 operates on a two-button system, making it straightforward and user-friendly. It measures pH in a range of 0.00 to 14.00 pH and temperature from 0.0 to 50.0 °C (32.0 to 122.0 °F). The device automatically compensates for temperature variations, ensuring accurate pH readings across different environmental conditions. This is achieved through a built-in, exposed temperature sensor that facilitates faster and more precise temperature measurements.

A key feature of the pHep+ is its stability tag, which appears on the Liquid Crystal Display (LCD) and disappears once the reading has stabilized. This visual cue helps users identify when a measurement is ready, preventing premature recording of unstable data. The tester also includes a low battery indicator, which notifies the user if the battery power is low enough to potentially affect reading accuracy. This proactive warning helps maintain measurement integrity.

The electrode features a 2 cm long renewable cloth junction. This design extends the life of the electrode by allowing users to pull out a fresh section of the cloth when the existing one becomes dirty or clogged, a common issue with traditional junctions over time. This renewability contributes to the longevity and consistent performance of the tester.

Usage Features

To begin using the pHep+, users first remove the protective cap. If salt deposits are present, a simple rinse with water and blotting dry is sufficient. For dry electrodes or junctions, soaking the bottom 3 cm (1.2 inches) in storage solution for at least 30 minutes is recommended to rehydrate them, followed by rinsing and blotting dry. Calibration is crucial for accurate results, and it is recommended to calibrate the electrode periodically, especially before initial use.

Turning the tester ON/OFF is done by pressing the dedicated ON/OFF button. Upon activation, all LCD segments are displayed briefly, followed by the battery life percentage and stability tag, after which the tester enters measurement mode. To power off, the ON/OFF button is pressed again from measurement mode, and "OFF" will appear on the second LCD line before the device shuts down.

Calibration is initiated by pressing the CAL button, which displays "CAL" on the screen, indicating readiness for calibration. The pHep+ supports one, two, or three-point automatic calibration. For optimal accuracy, a sequential order of pH buffer solutions (pH 7.01, 4.01, and 10.01) is recommended. During calibration, the tester automatically recognizes the buffer values. A "rEC" message is displayed, and the stability icon disappears when the reading is stable. After a calibration point is accepted, pressing the CAL button saves the calibration, indicated by "Stor," and the tester returns to measurement mode. Calibrated buffers are marked with a "CAL" tag on the display. Users can clear the calibration and restore factory defaults by pressing the ON/OFF button in calibration mode, which displays "CLr."

The device also offers a setup menu to customize settings such as the temperature unit (°C or °F) and auto-off time (8 minutes, 60 minutes, or disabled). These settings can be accessed by removing the battery cover and pressing the Setup button located in the battery compartment. The ON/OFF button is used to navigate through parameters, and the CAL button changes the settings.

For measurement, the electrode is placed in the sample and gently stirred. Once the reading stabilizes and the stability indicator disappears, the measured pH value is displayed on the first LCD line, with the temperature on the second.

Maintenance Features

Proper care and maintenance are essential for ensuring the highest possible accuracy and extending the life of the pHep+ tester.

• Buffer Solutions: Fresh buffer solutions should be used for each calibration, as their values can change once sachets are opened.
• Rinsing: When taking successive measurements, the probe should be thoroughly rinsed with purified water to prevent cross-contamination between samples.
• Storage: To keep the glass tip and junction moist and ensure a quick response, a few drops of storage solution should be added to the protective cap when the tester is not in use. If storage solution is unavailable, pH 4.01 or pH 7.01 buffer can be used as an alternative. The electrode should never be stored in distilled or deionized water.
• Junction Renewal: A unique maintenance feature is the renewable cloth junction. When the junction becomes dirty, it can be pulled out by approximately 3 mm (1/8 inch) to expose a fresh section, effectively renewing the tester's life. This procedure can be repeated about nine times, ensuring the reference compartment remains covered.
• Cleaning: Film deposits and other impurities that accumulate on the membrane or junction over time must be removed periodically. For general cleaning, soaking the electrode tip in HI7061 General purpose cleaning solution for 30 minutes (or approximately 1 hour for general deposits) is recommended, followed by rinsing with distilled water. Specific cleaning solutions are available for different types of contaminants:
  • Protein deposits: Soak in HI7073 Protein cleaning solution for 15 minutes.
  • Inorganic deposits: Soak in HI7074 Inorganic cleaning solution for 15 minutes.
  • Oil and grease: Rinse with HI7077 Oil and grease cleaning solution. After any cleaning procedure, the electrode must be thoroughly rinsed with distilled water and then soaked in HI70300 Storage solution for at least one hour before taking further measurements.
• Battery Replacement: The battery life percentage is displayed upon power-on. If the battery level drops below 10%, the battery symbol blinks. If the battery is completely discharged, "dEAd bAtt" is displayed, and the tester turns off. To replace the CR2032 Lithium-ion battery, the battery cover on the back of the tester is turned counterclockwise to unlock. The cover is then removed, and the battery is replaced with the positive (+) side facing out. Only the specified battery type should be used, and old batteries must be disposed of according to local regulations.

The pHep+ HI98108 is designed for durability and ease of maintenance, ensuring consistent and accurate pH measurements over its lifespan.

Hanna Instruments pHep+ HI98108 Specifications

General

Type	pH Tester
pH Range	0.0 to 14.0 pH
pH Resolution	0.1 pH
pH Accuracy	±0.2 pH
Temperature Compensation	Automatic
Waterproof Rating	IP67
Display	LCD
Calibration	Automatic, 1 or 2 points
Temperature Resolution	0.1°C
Temperature Accuracy	±0.5 °C
Battery Type	4 x 1.5V AAA
Environment	0 to 50°C (32 to 122°F); RH max 100%
Temperature Range	0.0 to 50.0°C (32.0 to 122.0°F)