LOG

LOBAT

TIME

DATE

LOGGINGMICROPROCESSOR

TURBIDITY METER

LOGGINGMICROPROCESSOR

TURBIDITY METER ALT

DATE

READ

VIEW

STO

CLR

CAL

GLP

OFF

ON

HI 93703-11

HI 93703-11

%188

Instruction Manual

HI 93703-11Portable Logging

Turbidity Meter with RS232

w w w . h a n n a i n s t . c o m

MA

N93703-11R

1 08/05

SALES AND TECHNICAL SERVICE CONTACTS

Australia:Tel. (03) 9769.0666 • Fax (03) 9769.0699

China:Tel. (10) 88570068 • Fax (10) 88570060

Egypt:Tel. & Fax (02) 2758.683

Germany:Tel. (07851) 9129-0 • Fax (07851) 9129-99

Greece:Tel. (210) 823.5192 • Fax (210) 884.0210

Indonesia:Tel. (21) 4584.2941 • Fax (21) 4584.2942

Japan:Tel. (03) 3258.9565 • Fax (03) 3258.9567

Korea:Tel. (02) 2278.5147 • Fax (02) 2264.1729

Malaysia:Tel. (603) 5638.9940 • Fax (603) 5638.9829

Singapore:Tel. 6296.7118 • Fax 6291.6906

South Africa:Tel. (011) 615.6076 • Fax (011) 615.8582

Taiwan:Tel. 886.2.2739.3014 • Fax 886.2.2739.2983

Thailand:Tel. 66.2619.0708 • Fax 66.2619.0061

United Kingdom:Tel. (01525) 850.855 • Fax (01525) 853.668

USA:Tel. (401) 765.7500 • Fax (401) 765.7575

For e-mail contacts and complete list of Sales andTechnical offices, please see www.hannainst.com

2

Dear Customer,

Thank you for choosing a Hanna product.

Please read this instruction manual carefullybefore using the instrument.

This manual will provide you with the necessaryinformation for the correct use of the instrument.

If you need additional technical information, donot hesitate to e-mail us attech@hannainst.com

This instrument is in compliance with the directives.

TABLE OF CONTENTS

Preliminary Examination ............................ 3

General Description .................................... 3

Principle of Operation ................................. 5

Functional Description ................................ 6

Specifications ............................................ 7

Operational Guide ...................................... 8Measurement Procedure ....................... 8Log-on-demand ................................... 11Cleaning Logged Data ......................... 11Viewing Logged Data .......................... 12Viewing and setting Date and Time ..... 12Error Codes......................................... 13Ensure Accurate Measurements ............. 14Sources of Interference ....................... 15

Calibration ................................................ 16Calibration Procedure .......................... 16Viewing Calibration Date ..................... 18Ensure Accurate Calibration ................ 18Standard Suspension .......................... 19

Battery Replacement ............................... 20

PC Connection ......................................... 21

Accessories ............................................. 22

Warranty .................................................. 23

23

Recommendations for Users

Before using this product, make sure that it is entirely suitable for the environmentin which it is used.

Operation of this instrument in residential area could cause unacceptableinterferences to radio and TV equipments, requiring the operator to take allnecessary steps to correct interferences.

Any variation introduced by the user to the supplied equipment may degradethe instrument's EMC performance.

To avoid electrical shock, do not use this instrument when voltages at themeasurement surface exceed 24 Vac or 60 Vdc.

To avoid damages or burns, do not perform any measurement in microwaveovens.

WARRANTY

All Hanna Instruments meters are warrantedfor two years against defects in workmanshipand materials when used for their intendedpurpose and maintained according to instruc-tions. This warranty is limited to repair orreplacement free of charge. Damages due toaccidents, misuse, tampering or lack of pre-scribed maintenance are not covered.

If service is required, contact the dealer fromwhom you purchased the instrument. If underwarranty, report the model number, date ofpurchase, serial number and the nature of thefailure. First obtain a Returned Goods Authori-zation number from the Customer Service de-partment, then return the instrument with theAuthorization # included along with shipmentcosts prepaid. If the repair is not covered by thewarranty, you will be notified of the charges.

When shipping any instrument, make sure it isproperly packaged for complete protection.

All rights are reserved. Reproduction in wholeor in part is prohibited without the writtenconsent of the copyright owner.

3

Remove the instrument from the packing materialand examine it to make sure that no damage hasoccurred during shipping. If there is any damage,notify your Dealer.HI 93703-11 is supplied complete with:

• Glass cuvet with cap• Batteries (4 x 1.5V AA)• Instruction manual

Note : Save all packing material until you are surethat the instrument functions correctly. Anydefective item must be returned in its originalpackaging with the supplied accessories.

With HI 93703-11 turbidity measurements canbe performed with high precision in the field aswell as in the laboratory. HI93703-11 turbiditymeter is a microprocessor-based instrumentused to determine the turbidity of water andwaste-water. The meter covers a 0-1000 FTUrange in two scales: 0.00 to 50.00 FTU and 50to 1000 FTU. The autoranging feature of theinstrument sets the appropriate range for themeasurement.HI 93703-11 also includes a real-time clock andlog-on-demand capability. The PCcommunication is made through a serial port ofyour computer and the 5-pin socket on themeter.Note: HI 93703-11 has been designed

according to the ISO 7027 InternationalStandard, consequently the turbiditymeasurement units are expressed inFTU (Formazine Turbidity Unit). FTU isidentical to the other internationallyrecognized unit: NTU (NephelometricTurbidity Unit).

GENERAL DESCRIPTION

22

ACCESSORIES

HI 731318 Tissue for wiping cuvets (4 pcs)

HI 731321 Spare glass cuvet (4 pcs)

HI 731313 Maintenance kit: ruggedcarrying case including HI93703-0 and HI 93703-10calibration solutions, HI 93703-50 cuvet cleaning solution, 1tissue for wiping cuvets and 2cuvets

HI 93703-0 AMCO-AEPA-1 @0 FTU*calibration solution, 30 mL

HI 93703-05 AMCO-AEPA-1 @500 FTU*calibration solution, 30 mL

HI 93703-10 AMCO-AEPA-1 @10 FTU*calibration solution, 30 mL

HI 93703-50 Cuvet cleaning solution, 230mL

HI 92000 Windows® compatible software

HI 920011 Serial cable for PC connection(5 to 9-pin)

* 1 FTU = 1 NTU

PRELIMINARY EXAMINATION

4

The meter is housed in a rugged and lightweightcase, with an easy-to-read LCD.

To save battery-life, the instrument is equippedwith an automatic shut-off feature which isactivated after 5-minutes of non-use. This fea-ture is disabled when the meter is connected tothe serial port of the computer.

All operations can be carried out with only fivekeys and troubleshooting functions can beperformed with displayed error code guides.

A positive-locking system guarantees that thecuvet is firmly placed in the cell.

The keypad is water-resistant and can be wipedwith a moist cloth for quick cleanups.

Two or three point calibration (0,10, 500 FTU*)can be easily performed using available stan-dards, and the last calibration date is auto-matically stored for future retrivial.

We have chosen 10 FTU * as the standardcalibration point because it best fits thewater turbidity measurements in differentapplications, from drinking water to waste-water treatment.

HANNA instruments® uses the primary stan-dard AMCO-AEPA-1 to avoid all formazine-related problems. Formazine is a toxic, un-stable substance, which requires particular care:its standards have to be prepared only a fewminutes before performing the calibration, andcannot be reused because of their short life.HANNA instruments® standards are extremelystable, can be reused, and last up to sixmonths, if free from contamination.

HI 93703-11 can be used with both standards.

* 1 FTU = 1 NTU

21

Battery replacement must only take place in asafe area and using 1.5V AA alkaline batteries.

To install or replace thebatteries, turn the unit offand remove the batterycompartment cover on theraer of the meter.

Insert the new batterieswhile paying attention tothe polarity.

After the batteries have been installed, close thebattery cover and make sure the gasket is inplace before tightening the 2 screws, to ensurea watertight seal.

-

-+

+1.5V

1.5V

-

-+

+1.5V

1.5V

SCREW

POTS

PC CONNECTION

To communicate with the instrument throughthe HI 92000 software, use the HI 920011 cable(optional) to connect a serial port of your com-puter to the 5 pin connector of the meter.When connected the meter will maintain fullfunctionality, being able to perform a data trans-fer while the meter is being operated.

Notes :• Serial communication is not allowed when the

meter is being calibrated.• The auto shut-off feature is also disabled when

the meter is connected to a computer.

5

IR LED

EMITTED LIGHT (890 nm)

CUVET

LIGHTDETECTOR

90° SCATTEREDLIGHT

PRINCIPLE OF OPERATION

* 1 FTU = 1 NTU

HI 93703-11 has been designed to performmeasurements according to the ISO 7027 In-ternational Standard.

The instrument functions by passing a beam ofinfrared light through a vial containing the samplebeing measured.

A sensor, positioned at 90° with respect to thedirection of light, detects the amount of lightscattered by the undissolved particles presentin the sample. The microprocessor convertssuch readings into FTU* values.

As noted above, FTU unit is equal to the NTUunit. However, there are other known measure-ment units for turbidity: Jackson Turbidity Unit(JTU) based on the old method of Jackson'scandle, and Silica Unit (mg/L of SiO2). For yourreference the conversion table between thesemeasurement units is shown below:

JTU FTU/NTU SiO2 (mg/ L)

JTU 1 19 2.5

FTU/NTU 0.053 1 0.13

SiO2 (mg/L) 0.4 7.5 1

20

BATTERY REPLACEMENT

All components have been selected to mini-mize current drain without compromising func-tionality. In order to minimize the battery con-sumption, the meter is equipped with an auto-shut off function which switches the meter offafter 5 minutes of non-use.

The four 1.5V batteries guarantee 60 hours ofworking life (or 900 measurements).

In order to obtain accurate measurements, thebattery level is monitored every time the meteris switched on.

In addition, a "LO BAT " indication will appear onthe lower right corner of the display when thebatteries are weak (<10%). All four batteriesneed to be replaced.

When the batteries are too weak to ensurereliable measurements, the message 0% LOBAT appears for a few seconds, and then themeter will automatically switch itself off. Re-place the batteries immediately.

LOBAT

0%

LO BAT

6

3 5

1

6

7

8

4

LOG LOBAT

TIME

DATE

LOGGING

MICROPROCESSOR

TURBIDITY METER

LOGGING

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HI 93703-11

VIEWVIEW

STOSTO

CLRCLR

GLPGLP

CALCAL DATEDATE

READREAD

ALTALT

OFFON

%

188

2

FUNCTIONAL DESCRIPTION

1) Measurement cell2) LCD (Liquid Crystal Display)3) ON/OFF/CLR key, to turn the meter ON

and OFF, and to clear log memory4) GLP/CAL key, to display last calibration

date & time, and to enter calibration mode5) STO/VIEW key, to store sample after read-

ing, and to view log memory6) READ/DATE key, to perform measure-

ments, and to display (toggle) currentdate/time

7) ALT key, to activate the second functions(second function keys in orange)

8) RS232 connector (5 pin)

19

* 1 FTU = 1 NTU

STANDARD SUSPENSIONPresently, there are only two recognized pri-mary standards: AMCO-AEPA-1 and formazine.Hanna supplies HI 93703-11 with the AMCO-AEPA-1 which has a much longer shelf life at allconcentrations (approx. six months, if free fromcontamination). In addition, no special handlingor disposal is required and a much higherstability of suspended particles has been ob-served.On the other hand, formazine is a toxic sub-stance, generated by a known carcinogen, withpoor stability (particles flocculate and settlequickly). Lower concentrations change valuewithin a few days or hours after dilution.The consistency of HI 93703-11 readings byusing both standards has been separately es-tablished by Advanced Polymer Systems andHanna Instruments.Additional documentation about the formazinestandard and more complex calibration proce-dures is available upon request.

• All glassware that comes into contact withstandards should be maintained clean. Washwith the HI93703-50 cleaning solution andrinse with HI 93703-0 or turbidity free water.

• Rinse the vial twice with 5 ml of the liquid tobe tested. This removes the effect of anyprevious liquid and any dust or foreign ob-jects that may be present inside. Gently pourthe liquid down the side of the vial to reduceair bubbles (no mixing is required when HI93703-0 and HI 93703-10 AMCO-AEPA-1standards are used).

• Before inserting the vial into the instrument,wipe it with HI93703-70 or a soft, lint-freetissue. Handle vials so that no fingerprintscan get on the areas where light passes(approx. bottom 2 cm/1") .

7

SPECIFICATIONS

* 1 FTU = 1 NTU

Range 0.00 to 50.00 FTU *50 to 1000 FTU *

Resolution 0.01 and 1 FTU *

Accuracy ±0.5 FTU* or±5% of reading (whichever is greater)

Typical EMC Deviation ±2% FS

Calibration 3 point (0, 10 and 500 FTU*)

Light Source Infrared LED

Light Source Life Life of the instrument

Light Detector Silicon photocell

Data Logging 199 measurements, on-demand

PC Connection Through serial port,using HI 920011 connection cable and

HI 92000 Windows® compatible software

Battery Type 4 x 1.5V AA alkaline batteries

Battery Life Approx. 60 hours of continuous useor 900 measurements

Auto-off After 5 minutes of non-use

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

Dimensions 220 x 82 x 66 mm(8.7 x 3.2 x 2.6")

Weight 510 g (1.1 lb.)

18

• After approximately30 seconds the LCDwill display "----".

Now the instrumentis cal ibrated andready for use.

NOTE: If "ERR1" is displayed, the calibra-tion data is maintained.

VIEWING CALIBRATION DATE

To display the last cali-bration time and date,press the GLP button totoggle through the dateand time. If the displayshows "FS", the instru-ment has factory calibra-tion settings loaded andno date will be displayed.

VIEWING FIRMWARE VERSION

To display the firmware version press andhold the ON/OFF key forapprox. ten seconds(when turning the meteron).

The firmware version willbe displayed

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HI 93703-11

VIEWVIEW

STOSTO

CLRCLR

GLPGLP

CALCAL DATEDATE

READREAD

ALTALT

OFFON

FS

ENSURE ACCURATE CALIBRATIONThe procedure below should be carefully fol-lowed during testing and calibration:

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VIEWVIEW

STOSTO

CLRCLR

GLPGLP

CALCAL DATEDATE

READREAD

ALTALT

OFFON

V1.0

8

To prepare the instrument for takingmeasurements, first install the batteries (seeBattery Replacement section on page 20) andthen turn the instrument on.

To maximize battery-life, the display isautomatically switched off after 5-minutes ofnon-use. To reactivate the display, simplypress the ON/OFF key.

MEASUREMENT PROCEDURE:

• Turn the meter on bypressing the ON/OFFkey.

• The meter will carryout a self-test display-ing a full set of figures.

• The meter will carryout a battery test show-ing in percentage thebattery life left.

• When the LCD dis-plays “----” the meteris ready to measure.

• Fill a clean cuvet up to one quar-ter inch (0.5 cm) from its rim withthe thoroughly agitated sample.

• Allow sufficient time for bubblesto escape before securing the cap.Note: do not overtighten the cap.

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CALCAL DATEDATE

READREAD

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OFFON

1/4

“

0.5

cm

%

ba

98

OPERATIONAL GUIDE

LOG LOBAT

TIME

DATE %

188

17

• If "ERR1" appearsonthe LCD, please checkthe standard solution.

• After approximately 30 seconds the meterwill display 10.00, prompting the user toplace the 10.00 FTU standard solution inthe cuvet holder.

• Place the 10.00 FTUstandard in the holder press CAL, SIP andCL will start blinking

• After approximately30 seconds the meterwill display 500, asking the user to placethe 500 FTU buffersolution in the cuvetholder.

NOTE: At this point theuser can save the two point calibrationsetup by pressing ALT & CAL buttons,leaving the calibration mode.

To perform a three pointcalibration, place the 500FTU standard solution in thecuvet holder.

• Press CAL, SIP andCL will start blinking

10.00cl

sipcl

500cl

sipcl

err1

9

NOTE: Wipe the cuvet thoroughly with a lint-free tissue (HI 93703-70) before in-serting into the measurement cell.The cuvet must be completely free offingerprints and other oil or dirt, par-ticularly in the area where the lightgoes through (approx. the bottom 2 cm/1").

• Place the cuvet intothe cell and checkthat the notch on thecap is positioned se-cure ly in to thegroove.

• The mark on thecuvet cap shouldpoint towards theLCD.

• Press the READ keyand the LCD will dis-play a blinking “SIP”(Sampling in Pro-cess). The turbidityvalue will appear af-ter approx. 20 sec-onds.

51

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VIEWVIEW

STOSTO

CLRCLR

GLPGLP

CALCAL DATEDATE

READREAD

ALTALT

OFFON

16

To check the date of last calibration, simplypress the GLP/CAL key. Press again totoggle between date and time.

To make sure that the meter is calibrated, takea measure of a standard solution.

The instrument can be calibrated at two or threepoints and a monthly calibration is recom-mended.

CALIBRATION PROCEDURE

• Turn the meter on andwait for the display toshow "----".

• Press the ALT & CALbuttons together. The"CAL" message willblink on the display 3times. The meter thenenters the calibrationmode, displaying "0.00cl" and prompting theuser to insert the 0.00FTU standard.

• Place the 0.00 FTU stan-dard in the cuvet holder

• Press CAL, SIP andCL will start blinking

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CALCAL DATEDATE

READREAD

ALTALT

OFFON

CALIBRATION

0.00cl

sipcl

10

* 1 FTU = 1 NTU

• Even though HI93703-11 covers a verywide range of turbidity values, for veryaccurate measurements of samples ex-ceeding 40 FTU*, Standard Methods re-quire dilution. In such cases, the correctamount of HI93703-0 or turbidity-freewater to be added to the sample can becalculated as follows:

Vos = 3000 / T

where: Vos = volume of sample (mL) to becombined with HI 93703-0 toobtain the final volume of 100 mL.

T = HI 93703 reading (exceeding40FTU*)

E.g.: HI 93703 reading = 200 FTU *3000 / 200 = 15 mL (Vos)15 mL (Vos)+85 mL (HI93703-0) = 100 mL

At this point, take a sample of this solutionand measure its turbidity.The correct turbidity value of the originalsample will be:

Tn x 100 mL / Vos = T a

where: Tn = new HI 93703 reading

Ta = actual turbidity value of the original

sample

E.g. If Tn = 27 FTU *

Ta = 27 FTU *x100 mL / 15 mL = 180 FTU *

NOTE: Any sample taken above 1000 FTU willshow out of range by blinking "1000".

15

* 1 FTU = 1 NTU

hours (the sample needs to be kept at roomtemperature prior to the analysis).

• To obtain a representative sample, gently,but thoroughly, mix it before samples aretaken. Do not shake (to prevent air bubbles)and do not let the sample settle.

• It is recommended to calibrate the meter withthe supplied HI93703-10 @10 FTU* stan-dard at least once a month or more frequentlyfor greater accuracy.

• Before inserting vials into the instrument,wipe them with HI 93703-70 or a soft, lint-free tissue. Handle vials so that no finger-prints get on the areas where light passes(approx. the bottom 2 cm/1 inch).

If you experience any problems in taking mea-surements, contact your dealer or the nearestHanna Customer Service Center.

SOURCES OF INTERFERENCE• Presence of floating debris and coarse sedi-

ments which settle out rapidly will give falsereadings.

• The infrared light source used for HI 93703-11 turbidity meter, complies with the ISO7027 International Standard and can effec-tively minimize any errors due to coloreddissolved substances. This effect, called"true color", is a common interference formost commercially available instrumentsoperating in the range of visible light.

• Air bubbles and the effect of vibrations thatdisturb the surface of the sample may givefalse results and should be avoided.

• Dirty glassware could also affect readingsalong with scratched or dented vials.

11

LOG-ON-DEMAND:

• After taking a read-ing, press the STObutton. The lastsample read will bestored in memory.The display will alsoshow on the bottomright corner the reference number of thestored sample.

NOTE: When the maximum number of sampleshas been reached(199), the LCD dis-play will show "FULL".This is a warning thatyou will be overwrit-ing the oldest sample recorded. To store thecurrent sample, press the STO button againand this will overwrite the oldest sample in thememory. All samples are shifted (referencenumbers reduced by one). Sample numberone remains the oldest sample.

CLEARING LOGGED DATA:

• Press the ALT &CLR buttons to-gether. The displaywill show "CLR" forconfirmation. PressALT & CLR again toclear memory. Toabort the operation,press any button.

ALL SAMPLES PREVIOUSLY STOREDWILL BE ERASED FROM MEMORY!

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VIEWVIEW

STOSTO

CLRCLR

GLPGLP

CALCAL DATEDATE

READREAD

ALTALT

OFFON

FULL

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CLRLOG

14

• Real Time Clock

error ∗

• EEPROM error∗

• Internal communica-

tion error∗

• Internal Bus error∗

∗ Contact the HANNA office nearest to you.

err2

err3

err4

err5

ENSURE ACCURATE MEASUREMENTS• Each time the cuvet is used, tighten the cap

to the same degree.

• Discard the sample soon after the reading istaken to avoid permanently clouding the glass.

• All glassware used to contain the standardsand the samples should be maintained clean,washed with the HI93703-50 cleaning solutionand rinsed with HI 93703-0 or turbidity-freewater.

• Collect the samples in clean glass or plasticbottles, fit stoppers and perform the analysisquickly. If necessary, store the sample in acool, dark place, for up to a maximum of 24

12

VIEWING LOGGED DATA:

• Press the ALT & VIEWbuttons together. Thelast sample will be dis-played.

• Press the right arrow toscroll between turbidityvalue, date and time ofthe sample.

• Press the UP/DOWNarrows to view thesamples and use theright arrow to scroll thedate and time .

• Press ALT & VIEW again to exit this mode.

VIEWING AND SETTING DATE AND TIME:

VIEWING:• Press ALT & DATE to toggle

between date and time.SETTING:

• Press and hold ALT & DATEfor 3-4 seconds.

• Press UP/DOWN to correctand set the year.

• Press right arrow to scroll to

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VIEWVIEW

STOSTO

CLRCLR

GLPGLP

CALCAL DATEDATE

READREAD

ALTALT

OFFON

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VIEWVIEW

STOSTO

CLRCLR

GLPGLP

CALCAL DATEDATE

READREAD

ALTALT

OFFON

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HI 93703-11

VIEWVIEW

STOSTO

CLRCLR

GLPGLP

CALCAL DATEDATE

READREAD

ALTALT

OFFON

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VIEWVIEW

STOSTO

CLRCLR

GLPGLP

CALCAL DATEDATE

READREAD

ALTALT

OFFON

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VIEWVIEW

STOSTO

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CALCAL DATEDATE

READREAD

ALTALT

OFFON

13

month and day, use UP/DOWN to set.

• Press right arrow againto scroll to time, use UP/DOWN to set.

• Press right arrow againto save and exit dateand time setup.

Note: Press ALT & DATE to leave this modewithout saving.

ERROR CODES:

Every time the meter is switched on, the RealTime Clock and EEPROM are tested, and if anerror is found the corresponding error code willbe displayed.

The list of error codes is as follows:

• NO cover error

(check cuvet position)

• Calibration error

(check calibrationstandard value)

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cap

err1

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VIEWVIEW

STOSTO

CLRCLR

GLPGLP

CALCAL DATEDATE

READREAD

ALTALT

OFFON