Hanna Instruments HI97708 Manual de usuario

INSTRUCTION MANUAL

HI97708

Nitrite High Range

Photometer

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.

Thank you for choosing a Hanna Instruments product.

Please read this instruction manual carefully before using this instrument.

This manual will provide you with the necessary information for correct

use of this instrument, as well as a precise idea of its versatility.

If you need additional technical information, do not hesitate to e‑mail

us at [email protected] or view our worldwide contact list at

www.hannainst.com.

Dear

Customer,

TABLE OF CONTENTS

1. PRELIMINARY EXAMINATION ..........................................................................4

2. SAFETY MEASURES........................................................................................5

3. ABBREVIATIONS ...........................................................................................5

4. SPECIFICATIONS............................................................................................6

5. DESCRIPTION................................................................................................7

5.1. GENERAL DESCRIPTION & INTENDED USE.............................................. 7

5.2. FUNCTIONAL DESCRIPTION...................................................................8

5.3. PRECISION & ACCURACY.......................................................................9

5.4. PRINCIPLE OF OPERATION....................................................................9

5.5. OPTICAL SYSTEM................................................................................10

6. GENERAL OPERATIONS.................................................................................11

6.1. METER VALIDATION: CAL CHECK & CALIBRATION...................................11

6.2. CHEMICAL FORMULA & UNIT CONVERSION.......................................... 12

6.3. GLP...................................................................................................13

6.4. LOGGING DATA & LOG RECALL ............................................................. 13

6.5. GENERAL SETUP ................................................................................14

6.6. REAGENTS & ACCESSORIES.................................................................16

6.7. CONTEXTUAL HELP............................................................................. 16

6.8. BATTERY MANAGEMENT ..................................................................... 17

7. PHOTOMETER..............................................................................................18

7.1. PROPER USE OF POWDER PACKET....................................................... 18

7.2. CUVETTE PREPARATION...................................................................... 18

8. METHOD PROCEDURE ..................................................................................20

9. WARNING & ERROR DESCRIPTIONS...............................................................22

10. BATTERY REPLACEMENT ............................................................................. 24

11. ACCESSORIES............................................................................................ 25

11.1. REAGENT SETS.................................................................................25

11.2. OTHER ACCESSORIES .......................................................................25

CERTIFICATION.................................................................................................26

RECOMMENDATIONS FOR USERS.......................................................................26

WARRANTY ......................................................................................................26

PRELIMINARY EXAMINATION

1. PRELIMINARY EXAMINATION

Remove the instrument and accessories from the packaging and examine it carefully.

For further assistance, please contact your local Hanna Instruments Office or email us

at [email protected].

Each HI97708C is delivered in a rugged carrying case and is supplied with:

• Sample cuvette (2 pcs.)

• Sample cuvette cap (2 pcs.)

• Plastic stopper (2 pcs.)

• A ZERO - CAL Check Cuvette A

• HI97708B - CAL Check Cuvette B for Nitrite High Range

• Cloth for wiping cuvettes

• Scissors

• 1.5V AA Alkaline batteries

• CAL Check standard certificate

• Instrument quality certificate

• Instruction manual

Each HI97708 is delivered in a cardboard box and is supplied with:

• Sample cuvette (2 pcs.)

• Sample cuvette cap (2 pcs.)

• Plastic stopper (2 pcs.)

• 1.5V AA Alkaline batteries

• Instrument quality certificate

• Instruction manual

Note: Save all packing material until you are sure that the instrument works

correctly. Any damaged or defective item must be returned in its original packing

material with the supplied accessories.

SAFETY MEASURES

2. SAFETY MEASURES

• The chemicals contained in the reagent kits may be hazardous if

improperly handled.

• Read the Safety Data Sheets (SDS) before performing tests.

• Safety equipment: Wear suitable eye protection and clothing when

required, and follow instructions carefully.

• Reagent spills: If a reagent spill occurs, wipe up immediately and rinse

with plenty of water. If reagent contacts skin, rinse the affected area

thoroughly with water. Avoid breathing released vapors.

• Waste disposal: For proper disposal of reagent kits and reacted samples,

contact a licensed waste disposal provider.

3. ABBREVIATIONS

mg/L milligrams per liter (ppm)

mL milliliter

°C degree Celsius

°F degree Fahrenheit

EPA US Environmental Protection Agency

GLP Good Laboratory Practice

HDPE High Density Polyethylene

HR High Range

LED Light Emitting Diode

NIST National Institute of Standards and Technology

ABBREVIATIONS

SPECIFICATIONS

4. SPECIFICATIONS

Nitrite

Range 0 to 150 mg/L (as NO2-)

Resolution 1 mg/L

Accuracy ±4 mg/L ±4% of reading at 25 °C

Method Adaptation of the Ferrous Sulfate Method

Measurement

System

Light source Light Emitting Diode

Bandpass filter 575 nm

Bandpass filter

bandwidth 8 nm

Bandpass filter

wavelength accuracy ±1.0 nm

Light detector Silicon photocell

Cuvette type Round 24.6 mm diameter (22 mm inside)

Additional

Specifications

Auto logging 50 readings

Display 128 x 64 pixel B/W LCD with backlight

Auto-off After 15 minutes of inactivity

(30 minutes before a READ measurement)

Battery type 1.5 V AA Alkaline (3 pcs.)

Battery life > 800 measurements (without backlight)

Environment 0 to 50 °C (32 to 122 °F);

0 to 100% RH, non-serviceable

Dimensions 142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0")

Weight

(with batteries) 380 g (13.4 oz.)

Case ingress

protection rating IP67, floating case

DESCRIPTION

5. DESCRIPTION

5.1. GENERAL DESCRIPTION & INTENDED USE

The HI97708 is an auto-diagnostic portable photometer that benefits from Hanna’s

years of experience as a manufacturer of analytical instruments. It has an advanced

optical system that uses a Light Emitting Diode (LED) and a narrow band interference

filter that allows for accurate and repeatable readings.

The optical system is sealed from outside dust, dirt and water. The meter uses an

exclusive positive-locking system to ensure that the cuvettes are placed into the holder

in the same position every time.

With the CAL Check™ functionality, users are able to validate the performance of the

instrument at any time and apply a user calibration (if necessary). Hanna Instruments

CAL Check cuvettes are made with NIST traceable standards.

The built-in tutorial mode guides users step-by-step through the measurement

process. It includes all steps required for sample preparation, the required reagents

and quantities.

The HI97708 meter measures the nitrite content in water samples in the 0 to 150 mg/L

(ppm). The method is an adaptation of the Ferrous Sulfate Method.

The HI97708 photometer is a compact and versatile meter suitable for field or bench

measurements, featuring a:

• Sophisticated optical system

• Meter validation using certified CAL Check cuvettes

• Tutorial mode guides the user step-by-step

• Auto logging

• Waterproof IP67, floating case

• GLP features

DESCRIPTION

5.2. FUNCTIONAL DESCRIPTION

1. ON/OFF power button 3. Liquid Crystal Display (LCD) 5. Indexing mark

2. Keypad 4. Cuvette holder 6. Battery cover

Keypad Description

The keypad contains 3 direct keys and 3 functional keys with the following functions:

Press the functional key to perform the function displayed above it on the LCD.

Press and hold to power off/on. Press briefly to return to the previous screen.

Press to access the menu screen.

Press to display the context-sensitive help menu.

DESCRIPTION

5.3. PRECISION & ACCURACY

Precision is how closely repeated measurements are to one another. Precision is usually

expressed as standard deviation (SD).

Accuracy is defined as the closeness of a test result to the true value.

Although good precision suggests good accuracy, precise results can be inaccurate. The

figure explains these definitions.

5.4. PRINCIPLE OF OPERATION

Absorption of light is a typical phenomenon of interaction between electromagnetic

radiation and matter. When a light beam crosses a substance, some of the radiation

may be absorbed by atoms, molecules or crystal lattices. Photometric chemical analysis

is based on specific chemical reactions between a sample and reagent to produce a

light-absorbing compound.

If pure absorption occurs, the fraction of light absorbed depends both on the optical

path length through the matter and on the physical-chemical characteristics of the

substance according to the Lambert-Beer Law. If all other factors are constant, the

concentration "c" can be calculated form the absorbance of the substance.

Lambert-Beer Law:

-log I/Io= elc d

A = elc d

Io= intensity of incident light beam

I= intensity of light beam after absorption

el= molar extinction coefficient at wavelength l

c = molar concentration of the substance

d = optical path through the substance

DESCRIPTION

5.5. OPTICAL SYSTEM

Instrument Block Diagram

The internal reference system (reference detector) of the HI97708 photometer

compensates for any drifts due to power fluctuations or ambient temperature changes,

providing a stable source of light for your blank (zero) measurement and sample

measurement.

LED light sources offer superior performance compared to tungsten lamps. LEDs have

a much higher luminous efficiency, providing more light while using less power. They

also produce little heat, which could otherwise affect electronic stability. LEDs are

available in a wide array of wavelengths, whereas tungsten lamps have poor blue/

violet light output.

Improved optical filters ensure greater wavelength accuracy and allow a brighter,

stronger signal to be received. The end result is higher measurement stability and less

wavelength error.

A focusing lens collects all of the light that exits the cuvette, eliminating errors from

cuvette imperfections and scratches, eliminating the need to index the cuvette.

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