background image

Measurement Procedure

• Press the ON/OFF button to turn the checker 

on. All segments will be displayed for a few 

seconds, followed by “Add”

“C.1” with “Press” 

blinking.

• Fill the cuvette with 10 mL of unreacted sample 

and replace the cap. Insert the 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 

the content of one packet of 

HI774-0

 Marine 

Phosphate Ultra Low Range reagent. Replace 

the cap and shake gently for about 2 minutes 

until the powder is completely dissolved.

• Insert the cuvette into the checker and close the 

cap. Press and hold the ON/OFF button. The 

display will show the countdown prior to the 

measurement. Alternatively, wait 3 minutes 

and press the button.

• When the timer ends the checker will perform 

the reading. The instrument displays the 

phosphate concentration in ppm. The checker 
automatically turns off 2 minutes after reading.

Dear Customer, 

Thank you for choosing a Hanna Instruments product. Please read this 
instruction manual carefully before using the Checker

®

HC handheld 

colorimeter. For more information about Hanna Instruments and our 
products, visit www.hannainst.com or e-mail us at [email protected].
For technical support, contact your local Hanna Instruments Office or e-mail 
us at [email protected].

Preliminary Examination

Remove the Checker

®

HC handheld colorimeter and accessories from the packing 

material and examine it carefully. If you require any further information, please 
contact Hanna Instruments technical support team.
Each 

HI774

 is delivered in a case with custom insert and is supplied with:

• Sample cuvette and cap (2 pcs.)
• Marine Phosphate Ultra Low Range reagent starter kit (reagents for 10 tests)
• 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 packing material with the supplied accessories.

General Description & Intended Use

HI774

 Marine Phosphate Ultra Low Range handheld checker is designed to 

accurately determine phosphate level in applications such as aquaculture and 
drinking, agricultural and wastewaters.

HI774

 features a single-button operation system and is easy to use.

The large LCD is easy to read and the auto shut-off feature assures the battery 
will not be drained.

Specifications

Range

0.00 to 0.90 ppm

Resolution

0.01 ppm

Accuracy

±0.02 ppm ±5% of reading @ 25 °C (77 °F)

Light source

Light Emitting Diode @ 525 nm

Light detector

Silicon photocell

Method 

Adaptation of Standard Methods for the Examination of 
Water & Wastewater, 20

th

 Edition, Ascorbic Acid Method. 

The reaction between phosphate and the reagent causes a 
blue tint in the sample.

Environment

0 to 50 °C (32 to 122 °F); RH max. 95% non-condensing

Battery type

1.5V AAA Alkaline

Auto shut-off

After 7 minutes of non-use and 2 minutes after reading

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

Errors & Warnings

The checker shows clear warning messages when erroneous conditions appear and 
when measured values are outside the expected range. The information below 
provides an explanation of the errors and warnings, and the recommended action 
to be taken.

Light High:

 There is an excess amount of ambient light 

reaching the detector. Please check the preparation of the zero 
cuvette.

Light Low:

 There is not enough light to perform a measurement. 

Please check the preparation of the zero cuvette.

Inverted Cuvettes:

 The sample and the zero cuvettes are 

inverted. Swap the cuvettes and repeat the measurement.

Under Range:

 A blinking “0.00”

 

indicates that the sample 

absorbs less light than the zero reference. 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.
Verify that the sample does not contain any debris. Dilute the 
sample and repeat the measurement.

Battery Low:

 Battery level is too low for the checker to function 

properly. Replace the battery with a new one.

Drained Battery:

 The battery is drained and must be replaced. 

Replace the battery with a new one and restart the checker.

Summary of Contents for HI774

Page 1: ...HI774 Marine Phosphate Ultra Low Range INSTRUCTION MANUAL ...

Page 2: ...74 is delivered in a case with custom insert and is supplied with Sample cuvette and cap 2 pcs Marine Phosphate Ultra Low Range reagent starter kit reagents for 10 tests 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 packing ma...

Page 3: ...20th Edition Ascorbic Acid Method The reaction between phosphate and the reagent causes a blue tint in the sample Environment 0 to 50 C 32 to 122 F RH max 95 non condensing Battery type 1 5V AAA Alkaline Auto shut off After 7 minutes of non use and 2 minutes after reading 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 Cuv...

Page 4: ...e the cuvette unscrew the cap and add the content of one packet of HI774 0 Marine Phosphate Ultra Low Range reagent Replace the cap and shake gently for about 2 minutes until the powder is completely dissolved Insert the cuvette into the checker and close the cap Press and hold the ON OFF button The display will show the countdown prior to the measurement Alternatively wait 3 minutes and press the...

Page 5: ... zero cuvettes are inverted Swap the cuvettes and repeat the measurement Under Range A blinking 0 00 indicates that the sample absorbs less light than the zero reference 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 Ve...

Page 6: ...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 7 minutes of non use and 2 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 batt...

Page 7: ...l 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 recycli...

Page 8: ...ce 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 Tech...

Reviews: