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 20 minutes of non-use and
4 minutes after reading.
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
HI781-25
Reagents for 25 Marine Nitrate Low Range tests
Other Accessories
HI781-11
Marine Nitrate Low Range 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.)
HI740226
5 mL graduated syringe (1 pc.)
HI740228
Filter disc (25 pcs.)
HI740270
10 mL syringe with Luer Lock (1 pc.)
HI740271
Filter holder with Luer Lock (1 pc.)
HI740144P
Plastic tip for 5 mL syringe (10 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. Please note that this
test is not recommended for freshwater applications. 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
HI781
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.
IST781 05/20-1
HI781
Marine Nitrate Low Range
INSTRUCTION MANUAL
