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Tips for an Accurate Measurement

• Ensure the sample does not contain any debris.
• Whenever the cuvette is placed into the checker, it must be 

dry outside and free of fingerprints, oil and dirt. 

• Wipe the cuvette thoroughly with 

HI731318

 microfiber 

cleaning cloth or a lint-free cloth prior to insertion.

• Shaking the cuvette can generate bubbles, causing higher 

readings. To obtain accurate measurements, remove such 

bubbles by swirling or by gently tapping the cuvette.

• Do not let the reacted sample stand too long after reagent 

has been added, as accuracy will be affected.

• Discard the sample immediately after the reading has been 

taken or the glass might become permanently stained.

Battery Replacement

To save the battery, the checker shuts down after 10 minutes of non-use.

A fresh battery lasts for a minimum of 5000 measurements. When the battery is 

drained, the instrument displays “bAd” then ”bAt”, and turns off. 

To replace the battery, follow the next steps:
1. Press and hold the ON/OFF button to turn the checker off.
2. Turn the instrument upside down and use a screwdriver to unfasten the screw and 

remove the battery cover.

3. Remove the old battery, replace it with a new 1.5V AAA battery, inserting the 

negative end first.

4. Replace the battery cover, fasten and tighten the screw.

Accessories

Reagent Sets

HI780-25

Reagents for approximately 100 Marine pH tests

Other Accessories

HI780-11

Marine pH certified standard kit

HI731225

Cuvette black cap for Checker

®

 HC colorimeters (4 pcs.)

HI731318

Cloth for wiping cuvettes (4 pcs.)

HI731321

Glass cuvette and seal cap for Checker

®

 HC colorimeters (4 pcs.)

HI731353

Cuvette seal cap for Checker

®

 HC colorimeters (4 pcs.)

HI740028P

1.5V AAA battery set (12 pcs.)

HI93703-50

Cuvette cleaning 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. Any variation introduced 
by the user to the supplied equipment may degrade the checker’s performance. For 
yours and the checker’s safety do not use or store it in hazardous environments.

Warranty

HI780

 Checker

®

HC 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. 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 checker 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 product, 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.

IST780 05/20-3

HI780

Marine pH

INSTRUCTION MANUAL

Summary of Contents for Checker HC

Page 1: ...HI780 Marine pH INSTRUCTION MANUAL ...

Page 2: ...t Hanna Instruments technical support team Each HI780 is delivered in a case with custom insert and is supplied with Sample cuvette and cap 2 pcs Marine pH reagent starter kit 1 5V AAA Alkaline battery 1 pc Instruction manual Note Save all packing material until you are sure that the Checker HC handheld colorimeter works correctly Any damaged or defective item must be returned in its original pack...

Page 3: ... Method Colorimetric Adaptation of Phenol Red Method Environment 0 to 50 C 32 to 122 F max 95 RH non condensing Battery type 1 5V AAA Alkaline Auto shut off After 10 minutes of non use Dimensions 86 0 x 61 0 x 37 5 mm 3 4 x 2 4 x 1 5 Weight 64 g 2 3 oz Functional Description LCD Display Cap Cuvette with cap Cuvette holder LCD Liquid Crystal Display ON OFF button ...

Page 4: ...he cuvette into the checker and close the cap Press the ON OFF button When the display shows Add C 2 with Press blinking the checker is zeroed Remove the cuvette Unscrew the cap and add 5 drops of HI780 0 pH reagent indicator Replace the cap and invert 5 times to mix Insert the cuvette into the checker and press the ON OFF button The instrument displays the result in pH The checker automatically t...

Page 5: ...zero cuvettes are inverted Swap the cuvettes and repeat the measurement Under Range A blinking 6 3 indicates that the sample absorbs less light than the lower range limit Check the measurement procedure and make sure to use the same cuvette for reference zero and measurement Over Range Maximum concentration value displayed blinking indicates the measured value is outside the limits of the method V...

Page 6: ...d as accuracy will be affected Discard the sample immediately after the reading has been taken or the glass might become permanently stained Battery Replacement To save the battery the checker shuts down after 10 minutes of non use A fresh battery lasts for a minimum of 5000 measurements When the battery is drained the instrument displays bAd then bAt and turns off To replace the battery follow th...

Page 7: ...he 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 ...

Page 8: ...e 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 checker is to be returned to Hanna Instruments first obtain a Returned Goods Authorization RGA number from the Techn...

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