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17 

Chemical Oxygen Demand Low Range

7.  METHOD PROCEDURE

7.1.  CHEMICAL OXYGEN DEMAND LOW RANGE

REQUIRED REAGENTS

Code

Description

Quantity

EPA REAGENT

HI93754A‑0

*

COD Low Range EPA Reagent Vial

2 vials

DEIONIZED120

Deionized Water

2 mL

MERCURY FREE REAGENT

HI93754D‑0

*

COD Low Range Hg Free Reagent Vial

2 vials

DEIONIZED120

Deionized Water

2 mL

ISO REAGENT

HI93754F‑0

*

COD Low Range ISO Reagent Vial

2 vials

DEIONIZED120

Deionized Water

2 mL

REAGENT SETS

HI93754A‑25

Reagents EPA Low Range for 25 tests

HI93754D‑25

Reagents Hg Free Low Range for 25 tests

HI93754F‑25

Reagents ISO Low Range for 25 tests

* Reagent vial identification: COD A, COD D, COD F, red label

For other accessories see Accessories section.

Note

: Store the unused vials in their packaging in a cool and dark place.

MEASUREMENT PROCEDURE

Before using the reagent kit carefully read all the instructions and the Safety Data Sheets (SDS). 
Pay particular attention to all warnings, cautions and notes. Failure to do so may result in serious 
injury to the operator.

Reagent Blank Correction:

 This method requires a reagent blank correction. A single blank vial may be used 

more than once. The blank vial is stable for several months at room temperature. For improved accuracy, run a 
blank for each set of measurements and always use the same lot of reagents for blank and samples.

•  Choose a homogeneous sample. Samples containing solids capable of settling need to be homogenized 

with a blender.

•  Preheat the Hanna

®

 Reactor 

HI839800

 to 150 °C (302 °F). The optional 

HI740217

 safety shield is 

strongly recommended. Do not use an oven or microwave; samples may leak and generate a corrosive 
and possibly explosive atmosphere.

•  Remove the cap from two COD Low Range Reagent vials.

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Summary of Contents for HI97106

Page 1: ...UCTION MANUAL Hanna Instruments Inc 584 Park East Drive Woonsocket RI 02895 USA www hannainst com HI97106 Chemical Oxygen Demand Portable Photometer X Low Range X Medium Range X High Range X Ultra High Range ...

Page 2: ...ange Selection 15 6 2 Using the 16 mm Vial Adapter 15 6 3 Vial Preparation Mixing 15 6 4 Measurement Recommendations 16 6 5 Battery Management 16 7 Method Procedure 17 7 1 Chemical Oxygen Demand Low Range 17 7 2 Chemical Oxygen Demand Medium Range 19 7 3 Chemical Oxygen Demand High Range 21 7 4 Chemical Oxygen Demand Ultra High Range 23 8 Warning Error Descriptions 25 9 Battery Replacement 26 10 A...

Page 3: ...ny damaged or defective item must be returned in its original packing material with the supplied accessories 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 available on sds hannainst com Safety equipment Wear suitable eye protection and clothing when required and follow instructions carefu...

Page 4: ... 4 Approved Method for the COD Determination on Surface Waters and Wastewaters LED 610 nm Note Range is reduced to 1000 mg L as O2 when HI93754G 25 reagents are used Chemical Oxygen Demand HR Range 0 to 15000 mg L as O2 Resolution 1 mg L Accuracy 150 mg L or 2 of reading at 25 C whichever is greater Method Adaptation of the US EPA 410 4 Approved Method for the COD Determination on Surface Waters a...

Page 5: ... 64 pixel B W LCD with backlight Auto off After 15 minutes of inactivity after 30 minutes of inactivity if a Zero has been done but not a Read Battery type 1 5 V AA Alkaline 3 pcs Battery life over 10000 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 380 g 13 4 oz with batteries Casing IP67 rati...

Page 6: ...lusive positive locking system to ensure that the vials 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 Hanna Instruments CAL Check cuvettes are certified against NIST traceable reference instrument s The built in tutorial mode guides users step by step through the measurement proce...

Page 7: ... 6 Adapter aligning mark 7 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 ...

Page 8: ...ance according to the Lambert Beer law If all other factors are constant the concentration c can be calculated form the absorbance of the substance log I Io el c d or A el c d Io intensity of incident light beam I intensity of light beam after absorption el molar extinction coefficient at wavelength λ c molar concentration of the substance d optical path through the substance Figure 2 Lambert Beer...

Page 9: ...eck standards To ensire accuracy please perform meter validation at room temperature 18 to 25 C 64 5 to 77 0 F Note Protect the CAL Check cuvettes from direct sunlight by keeping them in the original packing Store between 5 and 30 C 41 to 86 F Do not freeze To perform a CAL Check 1 Press the key to enter menu 2 Use the functional keys to select CAL Check and press Select Not Available message or d...

Page 10: ... to continue Please wait message will be displayed during the measurement Note HI97100 ZERO HI97100 420 and HI97100 610 are included in the HI97106 11 CAL Check standards for COD photometer cuvette kit Please see Accessories for ordering codes 8 When the CAL Check is complete the display will show one of the following messages and the value obtained during the measurement PASSED measured value is ...

Page 11: ...ble using the Log Recall menu 1 Press the key to enter the menu Use the functional keys to select Log Recall and press Select 2 Use the functional keys to highlight a log and press Info to view additional information about the log From this screen Next and Previous can be used to view other logs 3 Press Delete to erase logged data After pressing Delete the instrument prompts for confirmation 4 Pre...

Page 12: ...on 0 to 100 Press Modify to change the display s contrast Use the functional keys to increase or decrease the percentage contrast value Press Accept to confirm the value or the key to return to the Setup menu without saving the new value Date Time Press Modify to change the date and time Press the functional keys to highlight the value to be modified year month day hour minute or second Press Edit...

Page 13: ...al keys to select the desired language Press Accept to choose one of the languages installed Beeper Option Enable Disable 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 is detected Press the functional key to enable or disable the beeper Tutorial Option Enable Disable Press the functional key to enable or disab...

Page 14: ...AL Press the key to enter the menu Use the functional keys to select Instruction manual and press Select Scan the QR code or follow link to download the manual in PDF format Press the key to exit 5 6 CONTEXTUAL HELP The photometer offers an interactive contextual help mode that assists the user at any time Press the key to access the help screen The instrument will display additional information r...

Page 15: ...wing precautions while using the 16 mm adapter Never use excessive force to insert the adapter Users should be able to insert the vial with light pressure using one finger If the vial does not reach the bottom if there is resistance or in case of Check the Zero cuvette message during the Zero operation check the aligment of the two index marks and gently push down the adapter to ensure it reaches ...

Page 16: ...zeroing and measurement when possible Discard sample immediately after reading has been taken or the glass might become permanently stained All reaction times reported in this manual are at 25 C 77 F In general reaction time should be increased for temperatures lower than 20 C 68 F and decreased for temperatures higher than 25 C 77 F 6 5 BATTERY MANAGEMENT The meter will perform an auto diagnostic...

Page 17: ...cool and dark place MEASUREMENT PROCEDURE Before using the reagent kit carefully read all the instructions and the Safety Data Sheets SDS Pay particular attention to all warnings cautions and notes Failure to do so may result in serious injury to the operator Reagent Blank Correction This method requires a reagent blank correction A single blank vial may be used more than once The blank vial is st...

Page 18: ...em in the test tube rack Warning The vials are still hot use caution when handling Leave the vials in the tube rack to cool to room temperature Do not shake or invert them the samples may become turbid 1 Blank 2 Sample Select COD LR method using the procedure described in the Range Selection section Insert the 16 mm vial adapter using the procedure described in the Using the 16 mm Vial Adapter sec...

Page 19: ... dark place MEASUREMENT PROCEDURE Before using the reagent kit carefully read all the instructions and the Safety Data Sheets SDS Pay particular attention to all warnings cautions and notes Failure to do so may result in serious injury to the operator Reagent Blank Correction This method requires a reagent blank correction A single blank vial may be used more than once The blank vial is stable for...

Page 20: ...them in the test tube rack Warning The vials are still hot use caution when handling Leave the vials in the tube rack to cool to room temperature Do not shake or invert them the samples may become turbid 1 Blank 2 Sample Select COD MR method using the procedure described in the Range Selection section Insert the 16 mm vial adapter using the procedure described in the Using the 16 mm Vial Adapter s...

Page 21: ...e blank vial may be used more than once The blank vial is stable for several months at room temperature For improved accuracy measurement run a blank for each set of measurements and always use the same lot of reagents for blank and samples Choose a homogeneous sample Samples containing solids capable of settling need to be homogenized with a blender Preheat the Hanna Reactor HI839800 to 150 C 302...

Page 22: ...r invert them the samples may become turbid 1 Blank 2 Sample Select COD HR method using the procedure described in the Range Selection section Insert the 16 mm vial adapter using the procedure described in the Using the 16 mm Vial Adapter section Insert the blank vial 1 into the holder Press Zero The display will show 0 0 when the meter is zeroed and ready for measurement Remove the vial Insert th...

Page 23: ... A single blank vial may be used more than once The blank vial is stable for several months at room temperature For improved accuracy measurement run a blank for each set of measurements and always use the same lot of reagents for blank and samples Choose a homogeneous sample Samples containing solids capable of settling need to be homogenized with a blender Preheat the Hanna Reactor HI839800 to 1...

Page 24: ...e or invert them the samples may become turbid 1 Blank 2 Sample Select COD UHR method using the procedure described in the Range Selection section Insert the 16 mm vial adapter using the procedure described in the Using the 16 mm Vial Adapter section Insert the blank vial 1 into the holder Press Zero The display will show 0 0 when the meter is zeroed and ready for measurement Remove the vial Inser...

Page 25: ...thatthesampledoesnotcontainanydebris The meter is either overheating or its temperature has dropped too low to operate within published accuracy specifications The meter must be between 0 and 50 C 32 and 122 F to perform any measurements Meter temperature has changed significantly since the zero measurement has been performed The zero measurement must be performed again The measured value is outsi...

Page 26: ...he meter If the issue persists please contact Hanna Instruments technical support 9 BATTERY REPLACEMENT To replace the instrument s batteries 1 Press and hold the key to turn the instrument off 2 Remove the battery cover by turning it counterclockwise 3 Remove the old batteries and replace with three new 1 5V AA batteries 4 Replace the battery cover and turn it clockwise to close 10 ABBREVIATIONS ...

Page 27: ...r cuvette kit Other Accessories HI70436M Deionized water 250 mL HI731311 Glass vial 16 mm external diameter 5 pcs HI731318 Microfiber cloth for wiping cuvettes 4 pcs HI731339P 100 µL automatic pipette HI731340 200 μL automatic pipette HI731341 1000 μL automatic pipette HI731342 2000 μL automatic pipette HI731349P Pipette tip for 100 µL graduated pipette 10 pcs HI731350 Pipette tip for 200 µL gradu...

Page 28: ...is used Any variation introduced by the user to the supplied equipment may degrade the meter s performance For your and the meter s safety do not use or store the meter in hazardous environments WARRANTY The HI97106 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to instructions This warranty is limited to repair o...

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