Hanna Instruments Foodcare HI981035 - Sushi PH Tester Manual

Introduction

Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using the tester.
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 HI981035 is delivered in a cardboard box and is supplied with:

• HI70004 pH 4.01 buffer solution, 20 mL sachet (2 pcs.) • HI70007 pH 7.01 buffer solution, 20 mL sachet (2 pcs.)
• HI700683 Cleaning solution for sushi, 20 mL sachet (2 pcs.)
• HI9072 Electrode storage solution, 13 mL dropper
• CR2032 3V Lithium-ion battery
• Instrument quality certificate
• Instruction manual

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

The HI981035 Sushi pH Tester is designed to measure the pH of sushi rice and ensure it meets the food-hygiene and Hazard Analysis Critical Control Point (HACCP) regulations. It features a single button operation system and is easy to use. It has a compact and waterproof casing and automatic pH calibration at one or two points. All readings are automatically compensated for temperature variations with a built-in temperature sensor. The flat tip of the pH electrode provides optimal contact between the rice and the sensor. The pH electrode has an open junction design and utilizes a non-flowing gelled reference electrolyte. The flat tip allows the pH electrode to equilibrate quickly and reproducibly.

Probe Features

Flat Glass Tip

The flat tip provides optimal surface contact for sushi rice pH measurements and for surfaces that cannot be penetrated.

Open Junction Reference

The open junction design uses a solid gel interface between the sushi rice sample and internal Ag/AgCl reference. This interface prevents silver from exiting the junction and makes it impermeable to clogging, resulting in a fast response and stable reading. This design allows for smaller sample sizes as there is no junction to submerge.

Titanium Body

Rugged and resilient, the titanium body of the probe works as an electronic shield protecting against interferences from electrical noise or humidity. The titanium body is virtually unbreakable, offering protection from accidental breakage.

Specifications

Functional Description & LCD Display

Preparation

• Remove the protective cap. Do not be alarmed if salt deposits are present. Rinse the probe with water and blot dry.
• If the glass and / or junction are dry, soak the electrode in storage solution for a minimum of 30 minutes. Rinse with water and blot dry.
• Calibrate the electrode before using. For best results it is recommended to recalibrate periodically.

Storage

• To ensure a quick response, the glass tip and the junction should be kept moist.
• Replace protective cap with a few drops of storage solution when not in use. Do not store the electrode in distilled or deionized water.

Operation

Press the ON/OFF button to turn the tester on. The tester displays all LCD segments for a few seconds.
The tester will enter measurement mode, the current reading and calibrated buffers will be shown.

Calibration

From measurement mode, press and hold the ON/OFF button until "CAL" is displayed.

1. For one or two-point calibration using pH 7.01 buffer solution, follow procedure A.
2. For one-point calibration using pH 4.01 buffer solution, follow procedure B.

Note: It is recommended to calibrate the electrode with buffers at the temperature it will be used at.

One or Two-Point Calibration with pH 7.01

Procedure A

When "7.01" is displayed, place the tip of the electrode in pH 7.01 buffer. When the reading is stable, the stability icon will disappear. When "4.01" is displayed, follow the procedure to the right for a one or two-point calibration.

One-Point

1. Press the ON/OFF button to save the one-point calibration.
   
2. "Sto" will be displayed when the calibration is saved.
   
3. The tester will return to measurement mode and the calibration tag will be displayed.
   

Two-Point

1. Place the tip of the electrode in pH 4.01 buffer. The buffer is automatically recognized, the stability indicator will blink.
   
2. Wait until the measurement is stable and the stability indicator dissapears. "Sto" will be displayed when the calibration is saved.
   
3. The tester will return to measurement mode and the calibration tags will be displayed.
   

One-Point Calibration with pH 4.01

1. When "7.01" is displayed, place the tip of the electrode in pH 4.01 buffer. The buffer value will be recognized automatically and "4.01" will be displayed.
   
2. When the reading is stable, the stability indicator will disappear. "Sto" will be displayed when the calibration is saved.
   
3. Tester will return to measurement mode and the calibration tag will be displayed.
   

Auto-Off

From measurement mode, press and hold the ON/OFF button. The LCD will show "OFF", "CAL" followed by "d08" (default setting, 8 minutes). Release the ON/OFF button. A single press on the ON/OFF button will change the auto-off timer to "d60" (60 minutes). To disable the auto-off feature, press the ON/OFF button again, LCD will show "d--". Press and hold to exit.

Clear Calibration

To clear the user calibration and restore the tester to factory default. From calibration mode, press and hold the ON/OFF button, the LCD will show "CLr".

Err Message

In calibration mode, if the probe is in the correct buffer solution and the "Err" message is displayed, the probe should be cleaned. Soak the probe in cleaning solution for 20 minutes. Rinse with water and hydrate electrode in storage solution for a minimum of 30 minutes before calibrating.

Battery Indicator

When the battery level is low, the tag on the LCD will blink. When the battery is depleted the "Erb" message is displayed and the tester is powered off.

Care & Maintenance

Please read the information below, to ensure the highest possible accuracy:

• Fresh buffer should be used for each calibration, once the sachets are opened the buffer value can change over time.
• For improved accuracy a two-point calibration is recommended.
• If the electrode is slow or sluggish, soak it in cleaning solution for 20 minutes. Rinse with water and hydrate the electrode in storage solution for a minimum of 30 minutes before calibrating.
• If measurements are taken successively, rinse the probe thoroughly in distilled or deionized water to eliminate cross-contamination.
• The probe should be cleaned after each use with a soft tissue to eliminate all impurities.
• When not in use, add a few drops of storage solution to the protective cap to keep the glass tip and the junction hydrated. If storage solution is not available, pH 4.01 or pH 7.01 buffer can be used. Never store the probe in distilled or deionized water.

Note: Never immerse the tester over the maximum immersion level.

Battery Replacement

To change the CR2032 lithium-ion battery, turn the battery cover, located on the back of the tester, counterclockwise to unlock. Remove 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

Documents / Resources

References

• pH Meters, Photometers, Titrators, Controllers - Hanna Instruments

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Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

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