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HI736

  

Phosphorus Ultra Low Range

INSTRUCTION MANUAL

Before using Hanna Instruments products, make sure that they are entirely suitable for your 
specific application and for the environment in which they are used. Any variation introduced 
by the user to the supplied equipment may degrade the meter’s performance. For yours and 
the instrument safety do not use or store the instrument in hazardous environments.

Recommendations for Users

Accessories

Reagent Sets

HI736-25

Reagents for 25 Phosphorus Ultra Low Range tests

Other Accessories

HI736-11

Phosphorus ULR Certified Standard Kit

HI731315

Glass Cuvettes and Caps for Checker

®

 HC Colorimeters (2 pcs.)

HI731318

Cloth for wiping cuvettes (4 pcs.)

HI731353

Cuvette Seal Cap for Checker

®

 HC Colorimeters (4 pcs.)

HI740028P

1.5V AAA batteries (12 pcs.)

HI93703-50

Cuvette cleaning solution (230 mL)

IST736   07/18

HI736

 is warranted for a period of one year after date of purchase against defects in 

workmanship and materials when used for their 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 instrument is to 
be returned to Hanna Instruments, first obtain a Return Goods Authorization number from the 
Technical Service department and then send it with shipping costs prepaid. When shipping any 
instrument, make sure it is properly packed for complete protection.

Warranty

  • It is important that the sample does not contain any debris.
  • Whenever the cuvette is placed into the measurement cell, it 

must be dry outside, and completely free of fingerprints, oil and 
dirt. Wipe it thoroughly with 

HI731318

 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 for too long after reagent 

is added, as accuracy will be affected.

  • After the reading it is important to immediately discard the 

sample, otherwise the glass might become permanently stained.

Tips for an Accurate Measurement

To save the battery, the instrument shuts down after 3 minutes of non-use and 2 minutes.
One fresh battery lasts for a minimum of 5000 measurements. When the battery is dead the 
instrument will display “

bAd

” then ”

bAt

” for 1 second and then turns off.

To restart the instrument, the battery must be replaced with a new one.
To replace the instrument’s battery:
•  Turn the instrument off by holding the button until the meter shuts off.
•  Turn the instrument upside down and remove the battery cover with a screwdriver.

•  Remove the battery from its location and replace it with a new one, inserting the negative 

end first.

•  Insert the battery cover and replace the screw with a screwdriver.

Battery Management

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