Hanna Instruments HI96738 - Chlorine Dioxide ISM Manual

Please read this instruction manual carefully before using the instrument.

For more information about Hanna Instruments and our products, visit www.hannainst.com.

For technical support, contact your local Hanna Instruments Office or e-mail us at tech@hannainst.com

Find your local Hanna Instruments Office at www.hannainst.com

PRELIMINARY EXAMINATION

Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occurred during shipment, please contact your local Hanna Instruments Office.

Each HI96738 Ion Selective Meter is supplied complete with:

• Sample Cuvettes and Caps (2 pcs.)
• 9V Battery
• Instruction Manual
• Quality Certificate

Note: Save all packing material until you are sure that the instrument works correctly. Any defective item must be returned in its original packing.

For more details about spare parts and accessories see "Accessories".

SPECIFICATIONS

FUNCTIONAL DESCRIPTION

1. GLP/ key: press to enter GLP mode. In calibration mode press to edit the date and time.
2. CAL CHECK key: press to perform the validation of the meter, or press and hold for three seconds to enter calibration mode.
3. ZERO/CFM key: press to zero the meter prior to measurement, to confirm edited values or to confirm factory calibration restore.
4. READ key: In measurement mode, press to make a measurement. In GLP mode press to view the next screen.
5. ON/OFF key: to turn the meter on and off.
6. Liquid Crystal Display (LCD)
7. Cuvette alignment indicator
8. Cuvette holder

DISPLAY ELEMENTS DESCRIPTION

1. The measuring scheme (lamp, cuvette, detector), appears during different phases of zero or reading measurement
2. Error messages and warnings
3. The battery icon indicates the charge state of the battery
4. The hourglass appears when an internal check is in progress
5. Status messages
6. The chronometer appears when the reaction timer is running
7. The month, day and date icons appear when a date is displayed
8. Four digit main display
9. Measuring units
10. Four digit secondary display

MEASUREMENT PROCEDURE

Measurement

1. Turn the meter on by pressing ON/OFF.
2. When the beeper sounds briefly and the LCD displays dashes, the meter is ready. The blinking "ZERO" indicates that the instrument needs to be zeroed first.
   
3. Fill two graduated mixing cylinders (#1 & #2) up to the 25 mL mark with the sample.
   
4. Add 0.5 mL of HI93738A-0 Reagent A to each cylinder (#1 & #2), close them and invert several times to mix.
   
5. Add the content of one packet of HI93738B-0 Reagent B to only one of the two cylinders (#1), close it and invert several times to mix. This is the blank.
   
6. Add precisely 0.5 mL of HI93738C-0 Reagent C to each cylinder (#1 & #2), close them and invert several times to mix.
   
7. Add 0.5 mL of HI93738D-0 Reagent D to each cylinder (#1 & #2), close them and invert several times to mix. Cylinder 2 is the sample.
   
8. Fill a cuvette up to the 10 mL mark with blank (#1) and replace the cap.
   
9. Place the blank (#1) into the holder and ensure that the notch on the cap is positioned securely into the groove.
   
10. Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. After a few seconds the display will show "-0.0-". The meter is now zeroed and ready for measurement.
    
11. Fill a cuvette up to the 10 mL mark with the reacted sample (#2) and replace the cap.
    
12. Insert the sample into the instrument and ensure that the notch on the cap is positioned securely into the groove.
    
13. Press READ and the display will show the lamp, cuvette and detector icons, depending on the measurement phase. At the end of measurement, the instrument directly displays concentration in mg/L of chlorine dioxide on the LCD.
    

SAMPLING PROCEDURE

It is recommended to analyze chlorine dioxide samples immediately upon collection. Chlorine dioxide samples must be stored in dark, glass stoppered bottles, with minimal head space. Excessive heat (greater than 25°C / 78°F), agitation and exposure to light must be avoided.

INTERFERENCES

Interference may be caused by strong oxidants.

ERRORS AND WARNINGS

On zero reading

Light High: There is too much light to perform a measurement. 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.

No Light: The instrument cannot adjust the light level. Please check that the sample does not contain any debris.

On sample reading

Inverted cuvettes: The sample and the zero cuvette are inverted.

Zero: A zero reading was not taken. Follow the instructions of the measurement procedure for zeroing the meter.

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 cuvette for reference (zero) and measurement.

Over Range: 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.

During calibration procedure

Standard Low: The standard reading is less than expected.

Standard High: The standard reading is higher than expected.

Other errors and warnings

Cap error: Appears when external light enters in the analysis cell. Assure that the cuvette cap is present.

Cooling lamp: The instrument waits for the lamp to cool down.

Battery low: The battery must be replaced soon.

Dead battery: This indicates that the battery is dead and must be replaced. Once this indication is displayed, normal operation of the instrument will be interrupted. Change the battery and restart the meter.

ACCESSORIES

VALIDATION AND CALIBRATION PROCEDURES

Do not validate or calibrate the instrument with standard solutions other than the Hanna Instruments CAL Check™ Standards, otherwise erroneous results will be obtained.

For accurate validation and calibration results, please perform tests at room temperature (18 to 25°C; 64.5 to 77.0°F).

Use the Hanna Instruments CAL Check™ cuvettes (see "Accessories") to validate or calibrate instruments.

Validation

1. Turn the meter on by pressing ON/OFF.
2. When the beeper sounds briefly and the LCD displays dashes, the meter is ready.
3. Place the CAL Check™ Standard HI96738-11 Cuvette A into the holder and ensure that the notch on the cap is positioned securely into the groove.
   
4. Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase.
   
5. After a few seconds the display will show "-0.0-". The meter is now zeroed and ready for validation.
6. Remove the cuvette.
7. Place the CAL Check™ Standard HI96738-11 Cuvette B into the holder and ensure that the notch on the cap is positioned securely into the groove.
   
8. Press CAL CHECK key and the lamp, cuvette and detector icons together with "CAL CHECK" will appear on the display, depending on the measurement phase.
   
9. At the end of the measurement 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 cuvettes are free of fingerprints, oil or dirt and repeat validation. If results are still found out of specifications then recalibrate the instrument.
   

Calibration

Note: It is possible to interrupt the calibration procedure at any time by pressing CAL CHECK or ON/OFF keys.

1. Turn the meter on by pressing ON/OFF.
2. When the beeper sounds briefly and the LCD displays dashes, the meter is ready.
3. Press and hold CAL CHECK for three seconds to enter calibration mode. The display will show "CAL" during calibration procedure. The blinking "ZERO" asks for instrument zeroing.
   
4. Place the CAL Check™ Standard HI96738-11 Cuvette A into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove.
   
5. Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase.
   
6. After a few seconds the display will show "-0.0-". The meter is now zeroed and ready for calibration. The blinking "READ" asks for reading calibration standard.
7. Remove the cuvette.
8. Place the CAL Check™ Standard HI96738-11 Cuvette B into the holder and ensure that the notch on the cap is positioned securely into the groove.
   
9. Press READ and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase.
   
10. The instrument will show for three seconds the CAL Check™ standard value.
    Note: If the display shows "STD HIGH", the standard value was too high. If the display shows "STD LOW", the standard value was too low. Verify that both CAL Check™ Standard HI96738-11 Cuvettes, A and B are free of fingerprints or dirt and that they are inserted correctly.
11. Then the date of last calibration (e.g.: "01.08.2009") appears on the display, or "01.01.2009" if the factory calibration was selected before. In both cases the year number is blinking, ready for date input.
    
    
12. Press GLP/ to edit the desired year (2009-2099). If the key is kept pressed, the year number is automatically increased.
13. When the correct year has been set, press ZERO/CFM or READ to confirm. Now the display will show the month blinking.
14. Press GLP/ to edit the desired month (01-12). If the key is kept pressed, the month number is automatically increased.
    
15. When the correct month has been set, press ZERO/CFM or READ to confirm. Now the display will show the day blinking.
16. Press GLP/ to edit the desired day (01-31). If the key is kept pressed, the day number is automatically increased.
    Note: It is possible to change the editing from day to year and to month by pressing READ.
    
17. Press ZERO/CFM to save the calibration date.
    
18. The instrument displays "Stor" for one second and the calibration is saved.
    
19. The instrument will return automatically to measurement mode by displaying dashes on the LCD.

GLP

In GLP mode, the last calibration date can be verified and the factory calibration can be restored.

Last Calibration Date

1. Press GLP/ to enter GLP mode. The calibration month and day will appear on the main display and the year on the secondary display.
   
2. If no calibration was performed, the factory calibration message, "F.CAL" will appear on the main display and the instrument returns to measurement mode after three seconds.
   

Factory Calibration Restore

It is possible to delete the calibration and restore factory calibration.

1. Press GLP/ to enter GLP mode.
2. Press READto enter in the factory calibration restore screen. The instrument asks for confirmation of user calibration delete.
   
3. Press ZERO/CFM to restore the factory calibration or press GLP/ again to abort factory calibration restore.
   
4. The instrument briefly indicates "donE" upon restoration of factory calibration prior to returning to measurement mode.

BATTERY MANAGEMENT

To save the battery, the instrument shuts down after 10 minutes of non-use in measurement mode and after 1 hour of non-use in calibration mode.

If a valid measurement was displayed before auto-shut off, the value is displayed when the instrument is switched on. The blinking "ZERO" means that a new zero has to be performed.

One fresh battery lasts for around 750 measurements, depending on the light level.

The remaining battery capacity is evaluated at the instrument startup and after each measurement.

The instrument displays a battery indicator with three levels as follows:

• 3 lines for 100% capacity
• 2 lines for 66% capacity
• 1 line for 33% capacity
• Battery icon blinking if the capacity is under 10%.

If the battery is empty and accurate measurements can't be taken any more, the instrument shows "dEAd bAtt" and turns off.

To restart the instrument, the battery must be replaced with a fresh one.

To replace the instrument's battery, follow the steps:

• Turn the instrument off by pressing ON/OFF.
• Turn the instrument upside down and remove the battery cover by turning it counterclockwise.
  
• Extract the battery from its location and replace it with a fresh one.
• Insert back the battery cover and turn it clockwise to close.

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 instrument's 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.

WARRANTY

HI96738 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to the instructions.

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 failure. If the repair is not covered by the warranty, you will be notified of the charges incurred.

Hanna Instruments reserves the right to modify the design, construction, or appearance of its products without advance notice.

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