Hanna Instruments HI774 User Manual

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.
•
Press and hold the ON/OFF button to turn the checker off.
2.
3.
Replace the battery cover, fasten and tighten the screw.
09/20
HI774
Marine Phosphate Ultra Low Range
INSTRUCTION MANUAL
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Hanna Instruments HI774 Specifications

General

Brand	Hanna Instruments
Model	HI774
Category	Measuring Instruments
Language	English

Summary

Preliminary Examination

General Description & Intended Use

Specifications

Functional Description & LCD Display

Measurement Procedure

Errors & Warnings

Light High

Indicates excess ambient light reaching the detector; check zero cuvette preparation.

Light Low

Indicates insufficient light for measurement; check zero cuvette preparation.

Under Range

Sample absorbs less light than reference; check procedure and cuvette use.

Inverted Cuvettes

Indicates cuvettes were inverted; swap them and repeat the measurement.

Over Range

Measured value exceeds method limits; dilute sample and repeat measurement.

Battery Low

Battery level is too low for proper function; replace the battery.

Drained Battery

Battery is completely drained; replace it and restart the checker.

Tips for an Accurate Measurement

Battery Replacement