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Required Accessories

HI93738-01

Reagents for 100 tests

HI93738-03

Reagents for 300 tests

Other Accessories

HI96738-11

CAL Check™

 Standard Cuvettes (1 set)

HI740029P

9V battery (10 pcs.)

HI731318

Tissue for wiping cuvettes (4 pcs.)

HI731331

Glass cuvettes (4 pcs.) 

HI731335

Caps for cuvettes (4 pcs.)

HI93703-50

Cuvettes cleaning solution (230 mL)

ACCESSORIES

HI96738

 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 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. 
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.

WARRANTY

IST96738   01/18

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

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

Please examine this product carefully. Make sure that the instrument is not 

damaged. If any damage occured 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.

 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

Thank You

Thank you for choosing a Hanna Instruments product. 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 [email protected]
Find your local Hanna Instruments Office at www.hannainst.com

PRELIMINARY EXAMINATION

 

For more details about spare parts and accessories see 
“Accessories”.

SPECIFICATIONS

Range

0.00 to 2.00 mg/L

Resolution

0.01 mg/L

Accuracy 
@25 

°

C (77 

°

F)

±0.10 mg/L ±5% of reading

Light source

Tungsten Lamp

Light Detector

Silicon Photocell with narrow band interference 
filter @575 nm

Method

Adaptation of the Chlorophenol Red method. The 

reaction between chlorine dioxide and reagents 

causes a colorless to purple tint in the sample.

Environment

0 to 50 

°

C (32 to 122 

°

F); 

max 95% RH non-condensing

Battery Type

9V (1 pc.)

Auto-Shut off

After 10’ of non-use in measurement mode;
after 1 hour of non-use in calibration mode;
with last reading reminder

Dimensions

192 x 104 x 69 mm (7.6 x 4.1 x 2.7”)

Weight

320 g (11.3 oz.)

DISPLAY ELEMENTS DESCRIPTION:

FUNCTIONAL DESCRIPTION

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.

During calibration procedure:

On zero reading:

On sample reading:

ERRORS AND WARNINGS

Other errors and warnings:

Cap error:

 Appears when external light enters 

in the analysis cell. Assure that the cuvette cap 
is present.

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.

HI9

37

38

B-0

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.

2

8

HI93738A-0

5

6

HI93738C-0

HI93738D-0

7

4

3

9

MEASUREMENT PROCEDURE

Measurement

 

10

#1

11

#2

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 exeposure to light must be 
avoided.

INTERFERENCES

:

Interference may be caused by strong oxidants.

12

13

Standard Low:

 The standard reading is less 

than expected.

Standard High:

 The standard reading is higher 

than expected.

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.

Cooling lamp:

 The instrument waits for the 

lamp to cool down.

Summary of Contents for HI96738

Page 1: ...INSTRUCTION MANUAL HI96738 Chlorine Dioxide ISM ...

Page 2: ... 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 For more details about spare parts and accessories see Accessories SPECIFICATIONS Range 0 00 to 2 00 mg L Resolution 0 01 mg L Accuracy 25 C 77 F 0 10 mg L 5 of reading Light source Tungsten Lamp Light Detector Silic...

Page 3: ...OFF key to turn the meter on and off 6 Liquid Crystal Display LCD 7 Cuvette alignment indicator 8 Cuvette holder 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 ch...

Page 4: ... 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 zero...

Page 5: ...sive heat greater than 25 C 78 F agitation and exeposure to light must be avoided INTERFERENCES Interference may be caused by strong oxidants 12 13 Standard Low The standard reading is less than expected Standard High The standard reading is higher than expected Inverted cuvettes The sample and the zero cuvette are inverted Zero A zero reading was not taken Follow the instructions of the measureme...

Page 6: ...s 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 WARRANTY IST96738 01 18 Hann...

Page 7: ...ector 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 specifica tions 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 ...

Page 8: ... 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 sta...

Page 9: ...is saved 19 The instrument will return automatically to measurement mode by displaying dashes on the LCD 14 15 16 17 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 ...

Page 10: ...ps 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 3 Press ZERO CFM to restore the factory calibration or press GLP again to abort factory calibration restore 4 The instrument briefl...

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