Hanna Instruments HI98129

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Measurement

Use SET/HOLD to select pH mode. Place

the electrode in the solution to be tested

while stirring gently. The measurement

should be taken after the stability tag

has disappeared. The pH value is displayed

on the first LCD line and the temperature on the second LCD line.

Note: Before taking any pH measurement make sure the tester

has been calibrated (“CAL“ tag is displayed).

EC/TDS Calibration & Measurement

Calibration Procedure

• From measurement mode, press and hold /MODE until “CAL” is

displayed on the second LCD line.

• Place the probe in calibration solution: HI70031 (1413 µS/cm)

for HI98129 and HI70030 (12.88 mS/cm) for HI98130.

• The LCD displays “OK” for 1 second and the tester returns to

measurement mode.

Note: The “CAL” tag on the LCD indicates that the tester is calibrated.

Measurement

Use SET/HOLD to select either EC or TDS mode.

Place the electrode in the solution to be tested

while stirring gently. Use plastic beakers to

minimize any electromagnetic interferences.

The measurement should be taken after the

stability tag

has disappeared. The EC/TDS value is displayed on the

first LCD line and the temperature on the second LCD line.

Note: Before taking any measurement make sure the tester has

been calibrated (“CAL“ tag is displayed).

Changing EC/TDS Conversion Factor (CONV) & Temperature

Compensation Coefficient ß (BETA)

• From measurement mode, press and hold

/MODE until “TEMP”

and the current temperature unit are displayed on the second LCD

line (e.g. “TEMP °C”).

• Press /MODE again to show the current conversion factor (e.g.

“0.50 CONV”) and SET/HOLD to change the conversion factor.

• Press /MODE to show the current temperature compensation

coefficient ß (e.g. “% 2.1 BETA”) and SET/HOLD to change the

temperature compensation coefficient ß.

• Press /MODE to return to measurement mode.

Maintenance

Please read the information below to ensure the highest possible

accuracy.

• Fresh buffer solution should be used for each calibration.

• For improved accuracy a two-point calibration is recommended.

• If measurements are taken successively, rinse the probe thoroughly

in distilled or deionized water to eliminate cross-contamination.

• Clean the electrode monthly using pH and EC cleaning solution.

Keep the electrode in HI7061 - General purpose cleaning solution

for 30 minutes and rinse the probe thoroughly with water.

• When not in use, add a few drops of HI70300 Storage solution to the

protective cap. Never store the probe in distilled or deionized water.

Electrode Replacement

Use supplied removal tool (HI73128) to replace the pH electrode.

Insert the tool into the probe cavity.

Rotate the tool counterclockwise.

Pull the electrode out by using the

other side of the tool. Insert a new

pH electrode following the above

instructions in reverse order.

Battery Replacement

Battery life percentage indicator is displayed at power on. If the

battery level drops below 5%, the symbol lights up indicating

that the batteries should be replaced soon.

If the battery level is not adequate to guarantee an accurate reading,

the tester automatically turns off.

To replace the batteries, follow the next steps:

1. Turn OFF the tester.

2. Remove the four screws on the top of the tester to open the battery

compartment (figure 1).

3. Remove the old batteries.

4. Insert four new 1.5V AA batteries in the battery compartment

while paying attention to the correct polarity (figure 2).

5. Close the battery compartment using the four screws.

fig. 1 fig. 2

Note: Only use the battery type specified in the manual. Old

batteries should be disposed in accordance with local regulations.

Accessories

Electrode

HI73127 Replaceable pH electrode

HI73128 Electrode removal tool

Solutions

HI70004P pH 4.01 solution, 20 mL sachet (25 pcs.)

HI70006P pH 6.86 solution, 20 mL sachet (25 pcs.)

HI70007P pH 7.01 solution, 20 mL sachet (25 pcs.)

HI70009P pH 9.18 solution, 20 mL sachet (25 pcs.)

HI70010P pH 10.01 solution, 20 mL sachet (25 pcs.)

HI770710P

pH 10.01 & 7.01 solution, 20 mL sachet (10 pcs., 5 each)

HI77400P pH 4.01 & 7.01 solutions, 20 mL sachet (10 pcs., 5 each)

HI70030P 12.88 mS/cm solution, 20 mL sachet (25 pcs.)

HI70031P 1413 µS/cm solution, 20 mL sachet (25 pcs.)

HI70032P 1382 ppm solution, 20 mL sachet (25 pcs.)

HI70038P 6.44 ppt solution, 20 mL sachet (25 pcs.)

HI70442P 1500 ppm solution, 20 mL sachet (25 pcs.)

Electrode Cleaning Solution

HI7061M General purpose cleaning solution, 230 mL

Electrode Storage Solution

HI70300M Electrode storage solution, 230 mL

Other Accessories

HI740026P Replacement 1.5 V batteries (12 pcs.)

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 tester, make sure that it is entirely suitable for your

specific application and the environment in which it is used. The glass

bulb at the end of the electrode is sensitive to electrostatic discharges.

Avoid touching the glass bulb at all times. 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

HI98129 and HI98130 are warranted for a period of one year against defects

in workmanship and materials when used for their intended purpose and

maintained according to instructions. The electrode is warranted for a period

of six months. 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 Office, 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.

IST98129 09/19

HI98129 • HI98130

Waterproof pH, EC/TDS

& Temperature Testers

INSTRUCTION MANUAL

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Summary

General Description & Intended Use

Functional Description

LCD Display Overview

Detailed explanation of the tester's LCD screen segments and indicators.

Operational Guide

Tester Power On;Off

Instructions for powering the tester on and off using the /MODE button.

Measurement Hold Mode

How to freeze the current pH, EC/TDS, or temperature reading on the LCD.

pH Calibration and Measurement

Exiting Calibration and Resetting Defaults

Procedures for exiting calibration mode and returning the tester to factory default settings.

EC;TDS Calibration and Measurement

EC;TDS Calibration Procedure

Steps to calibrate the tester for EC/TDS measurements using standard solutions.

EC;TDS Measurement

How to perform EC/TDS measurements after calibration, including using plastic beakers.

Adjusting EC;TDS Conversion Factor and Temperature Compensation

Guide to adjust CONV factor and temperature compensation coefficient B.

Summary

General Description & Intended Use

Functional Description

LCD Display Overview

Detailed explanation of the tester's LCD screen segments and indicators.

Operational Guide

Tester Power On;Off

Instructions for powering the tester on and off using the /MODE button.

Measurement Hold Mode

How to freeze the current pH, EC/TDS, or temperature reading on the LCD.

pH Calibration and Measurement

Exiting Calibration and Resetting Defaults

Procedures for exiting calibration mode and returning the tester to factory default settings.

EC;TDS Calibration and Measurement

EC;TDS Calibration Procedure

Steps to calibrate the tester for EC/TDS measurements using standard solutions.

EC;TDS Measurement

How to perform EC/TDS measurements after calibration, including using plastic beakers.

Adjusting EC;TDS Conversion Factor and Temperature Compensation

Guide to adjust CONV factor and temperature compensation coefficient B.

This document describes the Hanna Instruments HI98129 and HI98130, which are compact, waterproof pH, EC/TDS, and temperature testers. These devices are designed for ease of use with a two-button operation system and are built to float if accidentally dropped in water.

Function Description

The HI98129 and HI98130 testers are multi-parameter instruments capable of measuring pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature. They feature automatic temperature compensation (ATC) for all pH, EC, and TDS measurements, ensuring accuracy across varying temperatures. The testers measure temperature in both Celsius and Fahrenheit. A key feature is the user-selectable EC/TDS conversion factor (CONV) and temperature compensation coefficient (β), allowing for customization based on specific application needs.

The devices incorporate a stability tag on the LCD, which disappears once the reading has stabilized, indicating when a reliable measurement can be taken. Battery level and a low-battery indicator are clearly displayed on the LCD, alerting the user to the need for battery replacement to prevent inaccurate readings. Furthermore, the Battery Error Prevention System (BEPS) automatically shuts off the tester if there isn't enough power to ensure an accurate measurement, safeguarding data integrity.

Both models come with a replaceable HI73127 pH electrode, which features a stainless steel round connector and an extendable cloth junction. This design simplifies electrode replacement by eliminating the need to align pins, which can often break. The integrated stainless steel temperature sensor facilitates faster and more accurate temperature measurements.

Usage Features

Turning the Tester ON / OFF: To turn the tester on, press and hold the ⏚/MODE button. All LCD segments will display for a few seconds, followed by the battery life percentage indicator. To turn the tester off from measurement mode, press the ⏚/MODE button. "OFF" will be displayed on the second LCD line before the tester powers down.

HOLD Mode: While in measurement mode, pressing and holding the SET/HOLD button will display "HOLD" on the screen. This freezes the current pH, EC/TDS, or temperature readings on the LCD. Pressing either button will resume normal measurement mode.

Setup Mode: The setup mode allows users to select the desired temperature unit and pH buffer set. To access this mode, select pH mode and then press ⏚/MODE until "TEMP" and the current temperature unit (e.g., "TEMP °C") are displayed. Users can then press SET/HOLD to cycle through temperature units. After selecting the temperature unit, pressing ⏚/MODE again allows selection of the pH buffer set (e.g., "pH7.01 BUFF" or "pH6.86 BUFF"). SET/HOLD changes the buffer set. To exit setup and return to measurement mode, press ⏚/MODE twice.

pH Calibration & Measurement: Frequent calibration is recommended, especially when high accuracy is required or when the pH electrode is replaced, at least monthly, or after testing aggressive samples. To enter calibration mode from measurement mode, press and hold ⏚/MODE until "CAL" is displayed. The tester will prompt for a buffer solution (e.g., "pH 7.01 USE"). The buffer value will appear on the first LCD line, and "REC" will be on the second line. If an invalid buffer is used, "USE" will display for 12 seconds, followed by "WRNG."

One-point calibration: For pH 4.01, 10.01, or 9.18 buffer solutions, the tester automatically accepts the calibration point once the reading stabilizes, displaying "OK 1" before returning to measurement mode. For pH 7.01 (or 6.86) buffer solutions, press ⏚/MODE after acceptance to display "pH 7.01" (or "pH 6.86") and "OK 1," then return to measurement mode.
Two-point calibration: After the first calibration point (pH 7.01 or 6.86) is accepted, the tester will prompt for a second buffer (e.g., "pH 4.01 USE"). If a valid buffer (pH 4.01, 10.01, or 9.18) is recognized, the calibration point is accepted, displaying "OK 2" before returning to measurement mode. If no valid buffer is recognized, "WRNG" will be displayed. Once calibration is complete, the "CAL" tag will illuminate.

Exiting Calibration & Resetting Default Values: While in calibration mode, pressing ⏚/MODE before the first calibration point is accepted will exit calibration, displaying "ESC" and returning to measurement mode with the last calibrated data. To clear a previous calibration and restore default values, press SET/HOLD before the first calibration point is accepted. The tester will display "CLR" on the second LCD line, the "CAL" tag will disappear, and the tester will revert to default calibration.

pH Measurement: To measure pH, use SET/HOLD to select pH mode. Place the electrode in the solution and stir gently. Wait for the stability tag to disappear before taking the reading. The pH value is displayed on the first LCD line, and temperature on the second. Ensure the tester is calibrated (indicated by the "CAL" tag) before measuring.

EC/TDS Calibration & Measurement:

Calibration Procedure: From measurement mode, press and hold ⏚/MODE until "CAL" is displayed on the second LCD line. Place the probe in the appropriate calibration solution (HI70031 for HI98129 or HI70030 for HI98130). The LCD will display "OK" for 1 second, and the tester will return to measurement mode. The "CAL" tag will indicate successful calibration.
Measurement: Use SET/HOLD to select either EC or TDS mode. Place the electrode in the solution and stir gently, using plastic beakers to minimize electromagnetic interference. Wait for the stability tag to disappear. The EC/TDS value will be displayed on the first LCD line, and temperature on the second. Ensure the tester is calibrated before taking measurements.

Changing EC/TDS Conversion Factor (CONV) & Temperature Compensation Coefficient β (BETA): From measurement mode, press and hold ⏚/MODE until "TEMP" and the current temperature unit are displayed. Press ⏚/MODE again to display the current conversion factor (e.g., "0.50 CONV"); use SET/HOLD to change it. Press ⏚/MODE once more to display the current temperature compensation coefficient β (e.g., "% 2.1 BETA"); use SET/HOLD to change it. Press ⏚/MODE to return to measurement mode.

Maintenance Features

General Maintenance:

Always use fresh buffer solution for each calibration to ensure accuracy.
A two-point calibration is recommended for improved accuracy.
Rinse the probe thoroughly with distilled or deionized water between successive measurements to prevent cross-contamination.
Clean the electrode monthly using a pH and EC cleaning solution. For general purpose cleaning, keep the electrode in HI7061 solution for 30 minutes, then rinse thoroughly with water.
When not in use, add a few drops of HI70300 Storage solution to the protective cap. Never store the probe in distilled or deionized water, as this can damage the electrode.

Electrode Replacement: The pH electrode is replaceable using the supplied HI73128 removal tool. Insert the tool into the probe cavity, rotate it counterclockwise, and then use the other side of the tool to pull out the old electrode. Insert a new pH electrode by reversing these steps.

Battery Replacement: The battery life percentage indicator is displayed upon power-on. If the battery level drops below 5%, a battery symbol will light up, indicating that replacement is needed soon. If the battery level is too low to guarantee accurate readings, the tester will automatically shut off. To replace batteries:

Turn off the tester.
Remove the four screws on the top of the tester to open the battery compartment.
Remove the old batteries.
Insert four new 1.5V AA batteries, paying attention to the correct polarity.
Close the battery compartment with the four screws. Only use the battery type specified in the manual, and dispose of old batteries according to local regulations.

Hanna Instruments HI98129 Specifications

General

Category	Test Equipment
pH Range	0.00 to 14.00 pH
pH Resolution	0.01 pH
EC Range	0 to 3999 µS/cm
EC Resolution	1 µS/cm
TDS Range	0 to 2000 ppm (mg/L)
TDS Resolution	1 ppm (mg/L)
Power Supply	4 x 1.5V AAA batteries
Temperature Compensation	Automatic
Environment	0 to 50°C (32 to 122°F); RH max 100%
ORP Resolution	1 mV
ORP Accuracy	±2 mV
IP Rating	IP67
Type	pH/EC/TDS Meter
EC Accuracy	±2% F.S.
TDS Accuracy	±2% F.S.
Temperature Range	0.0 to 60.0 °C / 32.0 to 140.0 °F
Temperature Resolution	0.1 °C
Temperature Accuracy	±0.5 °C
pH Calibration	1 or 2 points
TDS Calibration	1 point
Calibration	automatic, one or two-point