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The

HI 88713

Turbidity bench meter has a built in complete GLP information. The calibration date

and the calibration points are displayed in a comprehensive mode for each range.
To display the GLP information, simply press

CAL

key. A screen with instrument serial number and

with information about the calibration is displayed. For further information, press the “

GLP

”

functional key.

The GLP contains:

•

Instrument serial number

•

The last user calibration date, in

selected format and time in hh.mm format. If no
calibration was performed, the “Not calibrated”
message is displayed and the meter uses only the
factory calibration.

•

Parameter as NTU Ratio Turbidity, NTU

Non Ratio Turbidity, FAU Turbidity or FNU Turbidity.

•

The value of each calibration point (up to

5 points for NTU ratio mode; 4 points for FNU, FAU
and NTU non-ratio modes). If the first calibration
point was skipped, the 0.00 value is displayed.

GOOD LABORATORY PRACTICE (GLP)

To restore the factory calibration for the currently
selected range, press

CAL

key when in the main

screen. The first screen for the GLP is displayed.
Press

“Delete”

functional key to initiate the

calibration delete procedure and then press

“CFM”

functional key to delete the user calibration and
restore the Factory calibration.

Note:

Only the user calibration for the current

selected range is deleted.

RESTORE FACTORY CALIBRATION

Содержание HI 88713

Страница 1: ...1 www hannainst com HI 88713 ISO Turbidity Meter Instruction Manual ...

Страница 2: ...tech hannainst com or see the back side of this manual for our worldwide sales and technical service contacts This instrument is in compliance with directives PRELIMINARY EXAMINATION 3 GENERAL DESCRIPTION 3 ABBREVIATIONS 4 PRINCIPLE OF OPERATION 4 FUNCTIONAL DESCRIPTION 6 SPECIFICATIONS 8 GENERAL TIPS FOR AN ACCURATE MEASUREMENT 9 START UP 15 RANGE SELECTION 16 TUTORIAL MODE 16 HELP MODE 17 MEASUR...

Страница 3: ...based on a state of the art optical system which guarantees accurate results assures long term stability and minimizes stray light and color interferences It also compensates for variations in intensity of the LED making no need for frequent calibration The25mmroundcuvettesmadefromspecialopticalglassguarantiesreproductibilityandconsistency of the measurements Turbidity measurements can be made in ...

Страница 4: ...tions The intensity and pattern of the scattered light is affected by many variables including the wavelenght of the incident light particle size and shape refractive index and color The optical system of the HI 88713 turbidity bench meter uses an IR LED a scattered light detector 900 and a transmitted light detector 1800 PRINCIPLE OF OPERATION PRINCIPLE OF OPERATION PRINCIPLE OF OPERATION PRINCIP...

Страница 5: ...ansmitted light detectors The non ratio methods are more sensitive to the LED intensity fluctuations The lower detection limit of a turbidimeter is determined by the stray light Stray light is the light that reaches the detectors and is not caused by light scattering from suspended particles The optical system of HI 88713 instrument is designed to have very low stray light providing accurate resul...

Страница 6: ... backlight for better visibility in dark environments 2 Keypad Splash proof resistant 3 Cuvette Lid 4 USB connector 5 12 Vdc power input 6 ON OFF switch FUNCTIONAL DESCRIPTION FUNCTIONAL DESCRIPTION FUNCTIONAL DESCRIPTION FUNCTIONAL DESCRIPTION FUNCTIONAL DESCRIPTION ...

Страница 7: ... perform the function displayed above it The function are screen releated ESC Press to exit the current screen RANGE Press to access measurement modes Press to scroll up in a menu and help or to increment a set value LOG Press to scroll down in a menu and help or to decrement a set value Press to log the current reading CAL Press to access calibration menu RCL Press to recall the log HELP Press to...

Страница 8: ...0 NTU 0 00 to 9 99 10 0 to 99 9 100 to 245 EBC Resolution 0 01 0 1 1 NTU 0 01 0 1 1 EBC Accuracy 2 of reading plus straylight Range selection Automatic Repeatibility 1 of reading or straylight whichever is greater Stray Light 0 1 NTU 0 05 EBC Light Detector Silicon Photocell Method ISO 7027 Method Measuring mode Normal Average Continuous Turbidity Standards 0 1 15 100 750 FNU and 2000 NTU Calibrat...

Страница 9: ...y meter Special care must be taken during calibration and sample preparation to optimize the instrument performance and to fully benefit from its features Is very important for the analyst to use proper measurement techniques for accurate precise and repeatable readings The instructions listed below should be carefully followed during calibration and measurement to ensure optimum accuracy GENERAL ...

Страница 10: ...oroughly with a lint free cloth Wipe off the excess oil till you obtain a thin uniform layer If the procedure is correctly followed the cuvette should appear nearly dry with no visible oil Note The supplied cloth for oiling should be stored together with the silicone oil bottle and cuvettes taking care to avoid contamination with dirt After a few oiling procedures the cloth will contain enough oil...

Страница 11: ...average mode is on In order to index a cuvette follow the next steps Fill the cuvette with high quality water 0 1 FNU up to the 10 mL mark Clean and oil the cuvette as described in the previous section Turn the instrument ON Insert the cuvette into the instrument and press Read functional key Record the reading Open the instrument lid slightly rotate the cu vette and take a new reading Repeat the ...

Страница 12: ...ribed before Turn the instrument ON Insert the first cuvette into the instrument and press Read functional key Record the reading Open the instrument lid slightly rotate the cuvette and take a new reading Repeat the previous step until you read the lowest value Mark this position on the white band at the top of the cuvette with a water resistant pencil MATCHING MULTIPLE CUVETTES Precise measuremen...

Страница 13: ...tips when sampling Gently mix the water before taking the sample If the sample is taken from a pipe discard the first few liters If measuring a non uniform source collect samples from different places and mix them When measuring the collected sample keep in mind the following Samples should be analyzed immediately after collection because the turbidity can change in time To avoid dilution of the s...

Страница 14: ...e the sample as soon as possible Do not shake the sample vigorously because the surfactant may foam Always rinse the cuvette before adding a new sample to avoid surfactant accumulation Surfactant contribution to the turbidity readings is negligible Note Surfactant addition should be used for degassing only when other methods are ineffective USE OF AN ULTRASONIC BATH The ultrasonic waves are very e...

Страница 15: ... displayed in English and tutorial and help information are not available HEATING THE SAMPLE This procedure can be very effective however it should be handled with care because it can alter the turbidity of the sample When heating a sample the volatile components from the sample can vaporize the suspended components can dissolve or the sample characteristics can change The heating procedure should...

Страница 16: ...nd then press DOWN key until the Tutorial line is highlighted Press the Disable key then press ESC to return to the main screen RANGE SELECTION RANGE SELECTION RANGE SELECTION RANGE SELECTION RANGE SELECTION The HI 88713 bench top Turbidity meter has four measuring modes FNU FAU NTU Ratio and NTU Non Ratio When the instrument is in the main screen the selected mode is displayed in the right side o...

Страница 17: ... display the previous screen MEASUREMENT PROCEDURE MEASUREMENT PROCEDURE MEASUREMENT PROCEDURE MEASUREMENT PROCEDURE MEASUREMENT PROCEDURE When taking turbidity measurements several basic rules should be followed Always use cuvettes without scratches or cracks because they can cause inaccurate readings Always cap the cuvettes to prevent spillage of the sample from spilling the instrument Always cl...

Страница 18: ...blinking dashes The dashes and light icon will appear during different measurement phases The result is displayed in the selected units Replace the cap Wipe the cuvette thoroughly with a lint free cloth to remove any fingerprints dirt or water spots Apply silicone oil on the cuvette and wipe with a lint free cloth to obtain an even film over the entire surface of the cuvette Note It is very import...

Страница 19: ...remains on the display after the Read functional key is released AVERAGED MEASUREMENT This measurement mode is useful when samples that cause unstable readings are analyzed By averaging several readings noise effect is reduced and accurate measurements can be taken This mode can also be selected when high accuracy measurements are needed In the average mode 10 measurements are averaged in a short ...

Страница 20: ...arning Handle hydrazine sulfate with care because it is a carcinogen reagent Avoid inhalation ingestion or skin contact Formazin solution can also contain some hydrazine traces Solution II Dissolve 10 000 grams of hexamethylenetetramine CH2 6N4 in distilled deionized water and dilute to 100 mL in a volumetric flask Stock solution Mix 10 mL Solution I and 10 mL Solution II in a flask Let the stock ...

Страница 21: ...sure that you are in the correct mode To enter calibration press CAL key while in main screen The first screen of GLP information is displayed Press Cal functional key to start calibration ItispossibletointeruptcalibrationprocedureatanytimebypressingCALor ESC key FIRST POINT CALIBRATION The first calibration point is displayed on the LCD This point is used for FNU and NTU modes to check the qualit...

Страница 22: ...rement in calibration mode will be done using the average At the end of the measurement the second proposed calibration point is displayed SECOND POINT CALIBRATION Remove the first calibration cuvette Place the cuvette for second calibration point 15 NTU FNU calibration cuvette for NTU ratiometric mode 15 NTU formazin prepared standard for NTU non rating and FNU modes 100NTUformazinpreparedstandar...

Страница 23: ...tandardforFAUmode Note Ifnecessary pressUPorDOWNkeytoediteach calibration point value to match the exact value of the standard as measured with a reference turbidimeter Close the lid and press Read functional key The display will show the value blinking and the light icon during measurement At the end of the measurement the fourth proposed calibration point is displayed At this moment it is possib...

Страница 24: ...he light icon during measurement The Store message is displayed for FAU FNU and NTU non ratio modes and the calibration is saved The instrument returns to the main screen The fifth proposed calibration point 2000 NTU for NTU Ratio mode is displayed At this moment it is possible to exit calibration by pressing End functional key If the calibration is terminated the display will briefly show Store a...

Страница 25: ... if the correct standard is used or prepare a fresh standard if formazine is used and repeat the reading of the standard If the calculated calibration coefficients are outside a certainrangeacalibrationerrormessageisdisplayed OUT CAL RANGE FUNCTION The instrument has a mechanism to prevent taking measurements in a range where the calibration does not assure the best results The message Out of Cali...

Страница 26: ...ty or FNU Turbidity The value of each calibration point up to 5 points for NTU ratio mode 4 points for FNU FAU and NTU non ratio modes If the first calibration point was skipped the 0 00 value is displayed GOOD LABORATORY PRACTICE GLP GOOD LABORATORY PRACTICE GLP GOOD LABORATORY PRACTICE GLP GOOD LABORATORY PRACTICE GLP GOOD LABORATORY PRACTICE GLP To restore the factory calibration for the curren...

Страница 27: ...ed only once LOG RECALL The log can be consulted at any time by simply pressing RCL key To exit log consulting press RCL key again The log content is displayed one record at a time starting with the most recent one The information regarding one record is displayed in one screen To browse the log press the UP or DOWN key LOG DELETE The last log or all logs can be deleted To delete the last log simp...

Страница 28: ...alternatively the UP or DOWN key to increase or decrease the display backlight Press Accept functionalkeytoconfirmorESCtoreturnto the setup menu without saving the new value Contrast Values 0 to 20 This option is used to set the display s contrast Press Modify functionalkey tochangethedisplay scontrast Use the Right or Left functional key alternatively the UPor DOWN key to increase or decrease the...

Страница 29: ...to select the new value Date format Press Modify functional key to change the Date Format UsetheUPorDOWNkeytoselectthedesiredformat Press Accept functional key to confirm the value or ESC to return to the setup menu without saving the new format Language Option English Italiano or Español Press the corresponding function key to change the option If the new selected language cannot be loaded the pr...

Страница 30: ... This option is used to enable disable the beeper Press the Enable functional key to enable or disable this option When enabled a short beep is heard every time a key is pressed A long beep alert sounds when the pressed key is not active or an error condition is detected Instrument ID Option 0 to 9999 This option is used to set the instrument s ID identification number The instrument ID is used wh...

Страница 31: ... the instrument in hazardous environments RECOMMENDATIONS FOR USERS RECOMMENDATIONS FOR USERS RECOMMENDATIONS FOR USERS RECOMMENDATIONS FOR USERS RECOMMENDATIONS FOR USERS WARRANTY WARRANTY WARRANTY WARRANTY WARRANTY HI 88713 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 limit...

Страница 32: ...Fax 210 884 0210 Indonesia Tel 210 4584 2941 Fax 210 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 SouthAfrica Tel 011 615 6076 Fax 011 615 8582 Taiwan Tel 886 2 2739 3014 Fax 886 2 2739 2983 Thailand Tel 662 619 0708 Fax 662 619 0061 UnitedKingdom Tel 01525 850 855 Fax 01...

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