HANNA instruments HI98121 - Waterproof PH, ORP & Tempe Tester Manual

For more information about Hanna Instruments and our products, visit www.hannainst.com or e-mail us at sales@hannainst.com.

For technical support, contact your local Hanna Instruments Office or e-mail us at tech@hannainst.com.

Preliminary Examination

Remove the tester and accessories from the packing material and examine it carefully. If you require any further information, please contact Hanna Instruments technical support team at tech@hannainst.com.

Each HI98121 is delivered in a cardboard box and is supplied with:

Note: Save all packing material until you are sure that the tester works correctly. Any damaged or defective item must be returned in its original packing material with the supplied accessories.

General Description & Intended Use

HI98121 is a compact pH, ORP and temperature tester. It features a twobuttons operation system and is easy to use. The compact and waterproof casing is designed to float if accidentally dropped in water. The tester measures temperature in both °C and in °F. All pH measurements are temperature compensated automatically (ATC). The tester displays a stability () tag that will disappear once the reading has stabilized.

Battery level and low-battery indicator are clearly displayed on the LCD to alert the user in the event that low battery power could adversely affect readings.

BEPS (Battery Error Prevention System) Tester will automatically shut off if there is not enough power to get an accurate measurement.

pH Probe: HI98121 is supplied together with HI73127 pH replaceable electrode with a stainless steel round connector and extendable cloth junction. This design has no pins to line up or that can break.

Temperature Sensor: The built-in, stainless steel temperature sensor facilitates faster and more accurate temperature measurement.

Specifications

Functional Description

LCD Display

Operational Guide

Turning the Tester ON / OFF

Press and hold /MODE. All LCD segments will be displayed for a few seconds followed by battery life percentage indicator. To turn the tester off, from measurement mode, press /MODE. "OFF" will be displayed on the second LCD line and then the tester will turn off.

HOLD Mode

From measurement mode, press and hold SET/HOLD until "HOLD" is displayed. pH or ORP readings will be frozen on the LCD. Press either buttons to resume measurement mode.

Setup

Setup mode allows the selection of temperature unit and pH buffer set. To enter the setup mode, select pH mode and press /MODE until "TEMP" and the current temperature unit are displayed (e.g. "TEMP °C"). Then:

• Press SET/HOLD to select temperature unit. After the temperature unit has been selected, press /MODE to select the pH buffer set. To return to measurement mode, press /MODE twice.
• After setting the temperature unit, the tester will display the current buffer set: "pH7.01 BUFF" (for pH 4.01/7.01/10.01) or "pH6.86 BUFF" (for NIST pH 4.01/6.86/9.18). Press SET/ HOLD to change the buffer set and press /MODE to resume measurement mode.

Calibration & Measurement

It is recommended to calibrate the tester frequently, especially if high accuracy is required. More frequent calibrations may be required depending on the type of sample being tested. The tester should be recalibrated:

• whenever the pH electrode is replaced
• at least once a month
• after testing aggressive samples

pH Calibration Procedure

From measurement mode, press and hold /MODE until "CAL" is displayed. The tester enters calibration mode and displays "pH 7.01 USE" or "pH 6.86 USE", if NIST buffer was selected. Buffer value will be displayed on the first LCD line and "REC" message will be displayed on the second line. If used buffer was not valid, "USE" message will be displayed for 12 seconds and replaced by "WRNG", indicating measured sample is not valid.

Note: When the calibration procedure is completed, the "CAL" tag is turned on.

Exiting Calibration

• When in calibration mode, it is possible to exit calibration procedure by pressing /MODE, before first-point calibration has been accepted. The tester displays "ESC" and returns to measurement mode and last calibrated data.
• When in calibration mode, it is possible to clear a previous calibration and return to default values by pressing SET/HOLD, before the first calibration point has been accepted. The tester displays "CLR" on the second LCD line, "CAL" tag dissappears and tester returns to default calibration.

pH Measurement

Press 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).

ORP Measurement

Use SET/HOLD to select ORP mode. Place the electrode in the solution to be tested. The measurement should be taken after the stability tag has disappeared.

The ORP (mV) value is displayed on the first LCD line and the temperature on the second LCD line.

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 ORP cleaning solution. Keep the electrode in HI700601
• pH and ORP electrode 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.
   

Note: Only use the battery type specified in the manual. Old batteries should be disposed in accordance with local regulations.

Accessories

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 for 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 and the ORP electrode 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

HI98121 is warranted for a period of one year against defects in workmanship and materials when used for its 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.