Hanna Instruments HI 95701C Bedienungsanleitung

Instruction Manual

HI 95701C

Free Chlorine ISM

www.hannainst.com

This Instrument is in

Compliance with the CE Directives

MAN95701R2 05/06

www.hannainst.com

PRELIMINARY EXAMINATION .............................................................................................. 3

GENERAL DESCRIPTION....................................................................................................... 4

ABBREVIATIONS................................................................................................................. 4

SPECIFICATIONS ................................................................................................................ 5

PRECISION AND ACCURACY................................................................................................. 5

PRINCIPLE OF OPERATION .................................................................................................. 6

FUNCTIONAL DESCRIPTION ................................................................................................. 7

GUIDE TO DISPLAY CODES .................................................................................................. 9

GENERAL TIPS FOR AN ACCURATE MEASUREMENT .............................................................. 11

MEASUREMENT PROCEDURE ............................................................................................. 13

VALIDATION PROCEDURE .................................................................................................. 15

CALIBRATION PROCEDURE ................................................................................................ 16

BATTERY REPLACEMENT .................................................................................................... 18

ACCESSORIES .................................................................................................................. 18

CE DECLARATION OF CONFORMITY..................................................................................... 19

WARRANTY ...................................................................................................................... 19

Dear Customer,

Thank you for choosing a Hanna product. This manual will provide you with the necessary information

for the correct use of the instrument. Please read it carefully before using the meter. If you need

additional technical information, do not hesitate to e-mail us at [email protected].

This instrument is in compliance with directives.

All rights are reserved. Reproduction in whole or in part is prohibited without the written consent

ofthe copyright owner, Hanna Instruments Inc., Woonsocket, RhodeIsland, 02895 , USA.

TABLE OF CONTENTS

Recommendations for Users

Before using these products, make sure that they are

entirely suitable for your specific application and for

the environment in which they are used.

Operation of these instruments may cause

unacceptable interferences to other electronic

equipments, this requiring the operator to take all

necessary steps to correct interferences.

Any variation introduced by the user to the supplied

equipment may degrade the instruments' EMC

performance.

To avoid damages or burns, do not put the instrument

in microwave oven. For yours and the instrument

safety do not use or store the instrument in hazardous

environments.

HI 95701 is warranted for two years against defects in workmanship and materials when used for its

intended purpose and maintained according to the instructions.

This warranty is limited to repair or replacement free of charge.

Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered.

If service is required, contact your dealer. If under warranty, report the model number, date of

purchase, serial number and the nature of the failure. 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 Returned Goods Authorization

Number from the Customer Service Department and then send it with shipment costs prepaid. When

shipping any instrument, make sure it is properly packaged for complete protection.

To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date

of purchase.

HANNA instruments® reserves the right to modify the design, construction and appearance of its

products without advance notice.

CE DECLARATION OF CONFORMITY

WARRANTY

Please examine this product carefully. Make sure that the instrument is not damaged. If any damage

occured during shipment, please notify your Dealer.

Each HI 95701 Ion Selective Meter is supplied complete with:

• Two Sample Cuvets and Caps

• 9V Battery

• Scissors

• Two CAL CHECK™ Cuvets (HI 95701-11) with Quality Certificate

• Tissue for wiping cuvets

• Instruction Manual and Quick Reference Guide

• Instrument Quality Certificate

• Rigid carrying case

Note:save all packing material until you are sure that the instrument works correctly. Any defective

item must be returned in its original packing.

PRELIMINARY EXAMINATION

REAGENT SETS

HI 93701-01 Reagents for 100 Free Chlorine tests

HI 93701-03 Reagents for 300 Free Chlorine tests

OTHER ACCESSORIES

HI 95701-11 CAL CHECK™ Standard Cuvets (1 set)

HI 710009 Blue rubber boot

HI 710010 Orange rubber boot

HI 721310 9V battery (10 pcs)

HI 731318 Tissue for wiping cuvets (4 pcs)

HI 731331 Glass cuvets (4 pcs)

HI 731335 Caps for cuvets (4 pcs)

HI 93703-50 Cuvets cleaning solution (230 mL)

Battery replacement must only take place in a non-

hazardous area.

Simply slide off the battery cover on the back of the

meter. Detach the battery from the terminals and

attach a fresh 9V battery while paying attention to

the correct polarity. Insert the battery and replace

the cover.

SLIDE

OFF

FACTORY CALIBRATION RESET

It is possible to restore factory calibration:

• Enter the calibration modeby holding CAL CHECK

for three seconds.

• Hold ZERO for 10 seconds. The display will show

for 2 seconds “F.CAL” and "701" appears. The

factory calibration is automatically restored and

the instrument is ready for measurement.

BATTERY REPLACEMENT

ACCESSORIES

The HI 95701 is an auto diagnostic portable microprocessor meter that benefits from Hanna’s years of

experience as a manufacturer of analytical instruments. It has the advanced optical system based on

a special tungsten lamp and a narrow band interference filter that allows most accurate and repeatable

readings. All instruments are factory calibrated and the electronic and optical design minimizes the

need of frequent calibration.

With the powerful CAL CHECK™ validation function you are able to validate good performance of

your instrument at any time. The validation procedure is extremely user friendly. Just use the exclusive

Hanna ready-made, NIST traceable standards to verify the performance of the instrument and

recalibrate if necessary.

All instruments are splash waterproof and the lamp and filter units are protected from dust or dirt by

a transparent cup. This makes the instruments fulfill field applications. Display codes aid the user in

routine operation. The meter has an auto-shut off feature that will turn off the instrument after 10

minutes of non use or after 1 hour if left in the calibrationmode.

The meter uses an exclusive positive-locking system to ensure that the cuvet is in the same position

every time it is placed into the measurement cell. It is designed to fit a cuvet with a larger neck

making it easier to add both sample and reagents. The cuvet is made from special optical glass to

obtain best results.

The HI 95701 meter measures the free chlorine (Cl2) content in water samples in the 0.00 to 5.00

mg/L (ppm) range. The method is an adaption of the Standard Method 4500-Cl G for drinking water.

The reagent is in powder form and is supplied in packets. The amount of reagent is precisely dosed to

ensure the maximum repeatability.

degree Celsius

degree Fahrenheit

milligrams per liter. mg/L is equivalent to ppm (part per million)

milliliter

°C:

°F:

mg/L:

mL:

GENERAL DESCRIPTION

ABBREVIATIONS

• Press READ/TIMER and “SIP” will blink during

measurement.

• The instrument will show for three seconds the

CAL CHECK™ standard value.

Then the date of last calibration (e.g.: “01.08”)

appears on the display, or “01.01” if the factory

calibration was selected. In both cases the number

of the month is blinking, ready for date input.

Note: if the display shows “ERR” the calibration

procedure failed. Verify that both CAL CHECK™

Standards HI 95701-11 Cuvets, Aand B, are

free from fingerprints or dirt and that they are

inserted correctly.

DATE INPUT

• Keep READ/TIMER pressed to scroll to the desired

month number (01-12).

• When the correct month has been set, press ZERO

to confirm. Now the display will show the day

number blinking. Keep READ/TIMER pressed to

scroll to the desired day number (01-31).

Note: it is possible to change from dayto month

and vice versa by pressing ZERO.

• When both the day and month have been selected,

hold CAL CHECK for three seconds to store date

and calibration values. The instrument will show

for one second “Stor”, to confirm that the new

calibration data has been accepted.

• The instrument will return automatically to the

measurement mode by displaying "701" on the

LCD.

Range 0.00 to 5.00 mg/L

Resolution 0.01 mg/L from 0.00 to 3.50 mg/L; 0.10 mg/L above 3.50 mg/L

Precision ±0.02 mg/L @ 1.00 mg/L

Typical EMC Deviation ±0.01 mg/L

Light Source Tungsten lamp with narrow band interference filter @ 525 nm

Light Detector Silicon Photocell

Method Adaptation of the Standard Method 4500-Cl G. The reaction between

free chlorine and the DPD reagent causes a pink tint in the sample.

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

Battery Type 1 x 9 volt

Auto-Shut off After 10' of non-use in measurementmode;

after 1 hour of non-use in calibrationmode.

Dimensions 180 x 83 x 46 mm (7.1 x 3.3 x 1.8")

Weight 290 g (10 oz.).

REQUIRED REAGENTS

Code Description Quantity/test

HI 93701-0 Free Chlorine Reagent 1 packet

Precision is how closely repeated

measurements agree with each other.

Precision is usually expressed as standard

deviation (SD).

Accuracy is defined as the nearness of a test

result to the true value.

Although good precision suggests good

accuracy, precise results can be inaccurate.

The figure explains these definitions.

In a laboratory using a standard solution of

1.00 mg/L chlorine and a representative lot

of reagent, an operator obtained with a single

instrument a standard deviation of

0.02 mg/L.

SPECIFICATIONS

PRECISION AND ACCURACY

CALIBRATION PROCEDURE

• Turn the meter on by pressing ON/OFF.

• When the LCD displays “701”, it is ready.

• Enter the calibrationmodeby holding CAL CHECK

for three seconds.

• The date of the last calibration appears (e.g.:

month “01”, day “08”). “F.CAL” means that the

factory calibration is selected.

Note: at this point it is possible to reset the

instrument to restore FACTORY CALIBRATION, see

instructions page 18.

• Place the CAL CHECK™ Standard Cuvet Ainto

the holder and ensure that the notch on the cap is

positioned securely into the groove.

• Press ZERO and “SIP” will blink on the display.

• After a few seconds the display will show “-0.0-”.

The meter is now zeroed and ready for calibration.

• Remove the cuvet.

• Place the CAL CHECK™ Standard HI 95701-11

Cuvet Binto the holder and ensure that the notch

on the cap is positioned securely into the groove.

Note:it is possible to interrupt calibration procedure at any time by pressing ON/OFF.

Warning: do not validate or calibrate the instrument with standard solutions other than the Hanna

CAL CHECK™ Standards, otherwise erroneous results will be obtained.

CALIBRATION PROCEDURE

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.

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:

-log I/Io= ελc d

A = ελc d

Where:

-log I/Io= Absorbance (A)

Io= intensity of incident light beam

I= intensity of light beam after absorption

ελ= molar extinction coefficient at wavelength λ

c = molar concentration of the substance

d = optical path through the substance

Therefore, the concentration "c" can be calculated from the absorbance of the substance as the other

factors are known.

Photometric chemical analysis is based on the possibility to develop an absorbing compound from a

specific chemical reaction between sample and reagents. Given that the absorption of a compound

strictly depends on the wavelength of the incident light beam, a narrow spectral bandwidth should be

selected as well as a proper central wavelength to optimize measurements.

The optical system of Hanna's HI 95 series colorimeters is based on special subminiature tungsten

lamps and narrow-band interference filters to guarantee both high performance and reliable results.

HI 95 series block diagram (optical layout)

PRINCIPLE OF OPERATION

• Turn the meter on by pressing ON/OFF.

• When the LCD displays “701”, it is ready.

• Place the CAL CHECK™ Standard Cuvet Ainto

the holder and ensure that the notch on the cap is

positioned securely into the groove.

• Press ZERO and “SIP” will blink on the display.

• After a few seconds the display will show “-0.0-”.

The meter is now zeroed and ready for validation.

• Remove the cuvet.

• Place the CAL CHECK™ Standard HI 95701-11

Cuvet Binto the holder and ensure that the notch

on the cap is positioned securely into the groove.

• Press CAL CHECK and “SIP” will blink during

measurement.

Use the validation procedure to ensure that the instrument is properly calibrated.

Warning: do not validate or calibrate the instrument with standard solutions other than the Hanna

CAL CHECK™Standards, otherwise erroneous results will be obtained.

VALIDATION PROCEDURE

• Wait for a few seconds and the display will show the validation standard value.

The reading should be within specifications as reported on the CAL CHECK™ Standard Certificate.

If the value is found out of specifications, please check that the cuvets are free of fingerprints, oil or

dirt and repeat validation. If results are still found out of specifications then recalibrate the

instrument.

Temperature correction for Validation: corrected value = read value ×[1 +0.002 ×(20 −T(°C))]

corrected value = read value ×[1 +0.001 ×(68 −T(°F))]

A microprocessor controlled special tungsten lamp emits radiation which is first optically conditioned

and beamed to the sample contained in the cuvet. The optical path is fixed by the diameter of the

cuvet. Then the light is spectrally filtered to a narrow spectral bandwidth, to obtain a light beam of

intensity Ioor I.

The photoelectric cell collects the radiation Ithat is not absorbed by the sample and converts it into

an electric current, producing a potential in the mV range.

The microprocessor uses this potential to convert the incoming value into the desired measuring unit

and to display it on the LCD.

The measurement process is carried out in two phases: first the meter is zeroed and then the actual

measurement is performed.

The cuvet has a very important role because it is an optical element and thus requires particular

attention. It is important that both the measurement and the calibration (zeroing) cuvets are optically

identical to provide the same measurement conditions. Whenever possible use the same cuvet for

both. It is necessary that the surface of the cuvet is clean and not scratched. This to avoid measurement

interference due to unwanted reflection and absorption of light. It is recommended not to touch the

cuvet walls with hands.

Furthermore, in order to maintain the same conditions during the zeroing and the measuring phases,

it is necessary to close the cuvet to prevent any contamination.

1) Liquid Crystal Display (LCD)

2) Cuvet Holder

3) Cuvet alignment indicator

4) ON/OFF key

5) ZERO key

6) READ/TIMER key

7) CAL CHECK key

FUNCTIONAL DESCRIPTION

• Hold READ/TIMER for three seconds. The display

will show the countdown prior to measurement.

Alternatively, wait for 1 minute and just press

READ/TIMER.

In both cases “SIP” will blink during

measurement.

• The instrument directly displays concentration in

mg/L of free chlorine on the Liquid Crystal Display.

INTERFERENCES

•Alkalinity:

•Acidity:

•Hardness:

• Bromine (Br2):

• Chlorine dioxide (ClO2):

• Iodine (I2):

• Oxidized Manganese

and Chromium:

• Ozone (O3):

above 1,000 mg/L CaCO3 if present as bicarbonate (HCO3

-, sample pH

< 8.3); above 250 mg/L CaCO3 if present as carbonate (CO3

2-,

sample pH > 9.0).

In both cases, it will not reliably develop the full amount of color or it

may rapidly fade (negative error). To resolve this, neutralize the

sample with diluted HCl.

above 150 mg/L CaCO3. May not reliably develop the full amount of

color or it may rapidly fade (negative error). To resolve this, neutralize

the sample with diluted NaOH.

in case of water with hardness greater than 500 mg/L CaCO3, shake

the sample for approximately 2 minutes after adding the powder

reagent.

positive error.

KEYPAD DESCRIPTION

• ON/OFF: to turn the meter on and off.

• ZERO: to zero the meter prior to measurement.

• READ/TIMER: this is a bi-functional key, just press for making a measurement, or hold the key for

3 seconds to start a pre-programmed countdown prior to measurement.

• CAL CHECK: this bi-functional key allows to perform validation of the instrument just pressing the

CAL CHECK key, or hold the key for 3 seconds to enter the calibration mode.

OPERATING MODES

•Measurementmode:default operation mode, enables both validation and measurement.

•Calibration mode: may be entered by keeping CAL CHECK pressed for three seconds (the “CAL”

icon appears), it enables calibration of the instrument.

DISPLAY ELEMENTS DESCRIPTION

1) four digit main display area.

2) CAL: appears when the instrument operates in the calibration mode.

3) the Month and Day icons appear above the number of month and day when a date is displayed.

4) the blinking “Battery” icon appears when the battery voltage is getting low.

MEASUREMENT PROCEDURE

• Turn the meter on by pressing ON/OFF.

• When the LCD displays “701”, it is ready.

• Fill the cuvet with 10 mL of unreacted sample, up

to the mark, and replace the cap.

• Place the cuvet into the holder and ensure that

the notch on the cap is positioned securely into

the groove.

• Press ZERO and “SIP” will blink on the display.

• After a few seconds the display will show

“ -0.0- ”. The meter is now zeroed and ready for

measurement.

• Remove the cuvet.

• Add the content of one packet of HI 93701-0

Free Chlorine reagent. Replace the cap and shake

gently for 20 seconds (or 2 minutes in case of

seawater analysis).

• Replace the cuvet into the holder and ensure that

the notch on the cap is positioned securely into

the groove.

Turn the meter on by pressing ON/OFF and follow instruction manual to perform either the

MEASUREMENT, VALIDATION or CALIBRATION PROCEDURE.

MEASUREMENT PROCEDURE

This prompt appears for 1 second each time the instrument is turned

on.

This indicates that the meter is in a ready state and zeroing can be

performed.

Sampling in Progress. This flashing prompt appears each time the

meter is performing a measurement.

This indicates that the meter is in a zeroed state and measurement

can be performed.

Light over range: the cuvet is not inserted correctly and an excess

ambient light is reaching the detector. If the cover is properly installed,

then contact your dealer or the nearest Hanna Customer Service

Center.

The blinking "BAT" indicates that the battery voltage is getting low

and the battery needs to be replaced.

This indicates that the battery is dead and must be replaced. Once

this indication is displayed, the meter will lock up. Change the

battery and restart.

“Configuration”: this indicates that the meter has lost its configuration.

Contact your dealer or the nearest Hanna Customer Service Center.

CALIBRATION MODE MESSAGES

The date of the last calibration appears on the LCD each time the

calibration mode is entered. If calibration is performed for the first

time, “F.CAL” appears.

This indicates that the factory calibration is selected.

GUIDE TO DISPLAY CODES

• It is important that the sample does not contain any

debris. This would corrupt the reading.

• Each time the cuvet is used, the cap must be

tightened to the same degree.

• Whenever the cuvet is placed into the measurement

cell, it must be dry outside, and completely free of

fingerprints, oil or dirt. Wipe it thoroughly with

HI 731318 (tissue for wiping cuvets, see chapter

ACCESSORIES) or a lint-free cloth prior to insertion.

• Shaking the cuvet can generate bubbles in the

sample, causing higher readings. To obtain accurate

measurements, remove such bubbles by swirling or

by gently tapping the vial.

• Do not let the reacted sample stand too long after

reagent is added, or accuracy will be lost.

• It is possible to take multiple readings in a row, but

it is recommended to take a new zero reading for

each sample and to use the same cuvet for zeroing

and measurement.

• After the reading it is important to discard

immediately the sample, otherwise the glass might

become permanently stained.

• All the reaction times reported in this manual are

referred to 20°C (68°F). As a general rule of thumb,

they should be doubled at 10°C (50°F) and halved

at 30°C (86°F).

• In order to maximize accuracy, prior to a

measurement follow the validation procedure to

be sure that the instrument is properly calibrated. If

necessary, calibrate the instrument.

The flashing digits indicate that:

1) the month can be set

2) the day can be set

“Storage”: this prompt appears for 1 second at the end of the

calibration procedure, to indicate that the calibration data has

been stored.

“Error”:theconcentration of the calibration solutionusedisnotcorrect.

Repeatthecalibrationprocedurewiththerightstandardsolution,and

verifyitisnotexpired.Ifthecalibrationprocedurefailsagain,contactyour

dealer or the nearest Hanna Customer Service Center.

ERROR MESSAGES

a) on zero reading

This indicates that the zeroing procedure failed due to a low signal-to-

noise ratio. In this case press ZERO again.

“NoLight”:theinstrumentcannotadjustthelightlevel.Pleasecheckthat

thesample doesnot containany debris.

“LightLow”:thereisnotenoughlighttoperformameasurement.Please

check the preparation of the zero cuvet.

“LightHigh”:there is toomuchlighttoperformameasurement.Please

check the preparation of the zero cuvet.

b) on sample reading

Thereistoo much light forthesamplemeasurement.Pleasecheckifthe

right sample cuvet is inserted.

“Inverted”: the sample and the zero cuvet are inverted.

“Zero”: a zero reading was not taken. Follow the instruction in the

measurement procedure for zeroing the meter.

The instructions listed below should be carefully followed during testing to ensure best accuracy.

• For a correct filling of the cuvet: the liquid in the

cuvet forms a convexity on the top; the bottom of

this convexity must be at the same level of the

10 mL mark.

• Proper use of the powder reagent packet:

(a) use scissors to open the powder packet;

(b) push the edges of the packet to form a spout;

(a) (b) (c)

GENERAL TIPS FOR AN ACCURATE MEASUREMENT

Under range. A blinking "0.00" indicates that the sample absorbs

less light than the zero reference. Check the procedure and make

sure you use the same cuvet for reference (zero) and measurement.

A flashing value of the maximum concentration indicates an over

range condition. The concentration of the sample is beyond the

programmed range: dilute the sample and re-run the test.

A flashing value lower than the maximum concentration indicates a

low signal-to-noise ratio condition. In this case accuracy of the result

is not guaranteed. Repeat the measurement procedure.

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