Hanna Instruments HI97734 User manual

INSTRUCTION MANUAL
HI97734
Free and Total
Chlorine High Range
Photometer

Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the
instrument.
This manual will provide you with the necessary information for correct
use of the instrument, as well as a precise idea of its versatility.
If you need additional technical information, do not hesitate to
e‑mail us at [email protected] or view our worldwide contact
list at www.hannainst.com.
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.
Dear
Customer,

3
TABLE OF CONTENTS
1. PRELIMINARY EXAMINATION ........................................................................
2. SAFETY MEASURES......................................................................................
3. SPECIFICATIONS..........................................................................................
4. ABBREVIATIONS..........................................................................................
5. DESCRIPTION..............................................................................................
5.1. GENERAL DESCRIPTION AND INTENDED USE...........................................
5.2. FUNCTIONAL DESCRIPTION....................................................................
5.3. PRECISION AND ACCURACY....................................................................
5.4. PRINCIPLE OF OPERATION.....................................................................
5.5. OPTICAL SYSTEM ..................................................................................
6. GENERAL OPERATIONS.................................................................................
6.1. METER VALIDATION: CAL CHECK / CALIBRATION ......................................
6.2. GLP .....................................................................................................
6.3. LOGGING DATA/LOG RECALL...................................................................
6.4. GENERAL SETUP...................................................................................
6.5. REAGENTS/ACCESSORIES ......................................................................
6.6. CONTEXTUAL HELP................................................................................
6.7. BATTERY MANAGEMENT........................................................................
7. PHOTOMETER..............................................................................................
7.1. METHOD SELECTION.............................................................................
7.2. COLLECTING AND MEASURING REAGENTS AND SAMPLES .........................
7.2.1. PROPER USE OF POWDER PACKET .....................................................
7.2.2. PROPER USE OF SYRINGE..................................................................
7.2.3. PROPER USE OF DROPPER BOTTLE ....................................................
7.3. CUVETTE PREPARATION.........................................................................
8. METHOD PROCEDURE ..................................................................................
8.1. FREE CHLORINE HR ..............................................................................
8.2. TOTAL CHLORINE HR.............................................................................
9. ERROR DESCRIPTIONS .................................................................................
10. BATTERY REPLACEMENT .............................................................................
11. ACCESSORIES............................................................................................
11.1. REAGENT SETS ...................................................................................
11.2. OTHER ACCESSORIES..........................................................................
CERTIFICATION................................................................................................
RECOMMENDATIONS FOR USERS......................................................................
WARRANTY .....................................................................................................
4
4
5
6
8
9
9
11
14
5
6
7
8
9
11
12
14
14
15
15
15
15
15
16
16
17
17
20
23
24
25
25
25
26
26
27

4
1. PRELIMINARY EXAMINATION
Remove the instrument and accessories from the packaging and examine it carefully to
make sure that no damage has occurred during shipping. Notify your nearest Hanna
Customer Service Center if damage is observed.
Each HI97734C is delivered in a rugged carrying case and is supplied with:
• Sample cuvette (2 pcs.)
• Sample cuvette cap (2 pcs.)
• Plastic stopper (2 pcs.)
• A ZERO ‑ CAL CheckCuvette A
• HI97734B - CAL Check Cuvette B for Free and Total Chlorine HR
• Cloth for wiping cuvettes
• Scissors
• 1.5V AA Alkaline batteries
• Instruction manual
• Meter quality certificate
• CAL Check standard certificate
Each HI97734 is delivered in a cardboard box and is supplied with:
• Sample cuvette (2 pcs.)
• Sample cuvette cap (2 pcs.)
• Plastic stopper (2 pcs.)
• 1.5V AA Alkaline batteries
• Instruction manual
• Meter quality certificate
Note: Save all packing material until you are sure that the instrument works correctly.
Any 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.
• Safety equipment: Wear suitable eye protection and clothing when required, and
follow instructions carefully.
• Reagent spills: If a reagent spill occurs, wipe up immediately and rinse with plenty
of water. If reagent contacts skin, rinse the affected area thoroughly with water.
Avoid breathing released vapors.
• Waste disposal: For proper disposal of reagent kits and reacted samples, contact
a licensed waste disposal provider.
PRELIMINARY EXAMINATIONSAFETY MEASURES

5
Chlorine
(all methods)
Range 0.00 to 10.00 mg/L (as Cl2)
Resolution 0.01 mg/L
Accuracy ±0.03 mg/L ±3% of reading at 25 °C
Method Adaptation of EPA DPD method 330.5
Measurement
System
Light source Light Emitting Diode
Bandpass filter 525 nm
Bandpass filter
bandwidth 8 nm
Bandpass filter
wavelength accuracy ±1.0 nm
Light detector Silicon photocell
Cuvette type Round 24.6 mm diameter (22 mm inside)
Additional
Specifications
Auto logging 50 readings
Display 128 x 64 pixel B/W LCD with backlight
Auto‑off After 15 minutes of inactivity
(30 minutes before a READ measurement)
Battery type 1.5 V AA Alkaline (3 pcs.)
Battery life > 800 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 (with batteries) 380 g (13.4 oz.)
Case ingress protection
rating IP67, floating case
3. SPECIFICATIONS
SPECIFICATIONS
4. ABBREVIATIONS
mg/L milligrams per liter (ppm)
mL milliliter
°C degree Celsius
°F degree Fahrenheit
LED Light Emitting Diode
EPA US Environmental Protection Agency
DPD N,N‑diethyl‑p‑phenylenediamine
HDPE High Density Polyethylene
GLP Good Laboratory Practice
NIST National Institute of Standards and Technology
ABBREVIATIONS

6
DESCRIPTION
5. DESCRIPTION
5.1. GENERAL DESCRIPTION AND INTENDED USE
The HI97734 is an auto‑diagnostic portable meter that benefits from Hanna’s years
of experience as a manufacturer of analytical instruments. It has an advanced optical
system that uses a Light Emitting Diode (LED) and a narrow band interference filter
that allows for accurate and repeatable readings.
The optical system is sealed from outside dust, dirt and water. The meter uses an
exclusive positive‑locking system to ensure that the cuvettes 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 and apply a user calibration (if necessary). Hanna's CAL Check
cuvettes are made with NIST traceable standards.
The built‑in tutorial mode guides users step‑by‑step through the measurement process. It
includes all steps required for sample preparation, the required reagents and quantities.
The HI97734 meter measures free and total chlorine (Cl2) in water samples from 0.00
to 10.00 mg/L (ppm). The method is an adaptation of the US EPA method 330.5, DPD
Colorimetric method.
Chlorine is a widely used disinfectant in the treatment of drinking water, waste water,
and swimming pools.
The HI97734 photometer is a compact and versatile meter suitable for field or bench
measurements, featuring a:
• Sophisticated optical system
• Meter validation using certified CAL Check cuvettes
• Tutorial mode guides the user step‑by‑step
• Auto logging
• Waterproof IP67, floating case
• GLP features

7
Keypad Description
The keypad contains 3 direct keys and 3 functional keys with the following functions:
Press the functional keys to perform the function displayed above them 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.
DESCRIPTION
1) ON/OFF power button 3) Liquid Crystal Display (LCD) 5) Indexing mark
2) Keypad 4) Cuvette holder 6) Battery cover
5.2. FUNCTIONAL DESCRIPTION

8
DESCRIPTION
5.4. PRINCIPLE OF OPERATION
Absorption of light is a typical phenomenon of interaction between electromagnetic
radiation and matter. When a light beam crosses a substance, some of the radiation
may be absorbed by atoms, molecules or crystal lattices.
If pure absorption occurs, the fraction of light absorbed depends both on the optical
path length through the matter and on the physical‑chemical characteristics of the
substance according to the Lambert‑Beer Law:
‑log I/Io= elc d
or
A = elc d
Io= intensity of incident light beam
I = intensity of light beam after absorption
el = molar extinction coefficient at wavelength l
c = molar concentration of the substance
d = optical path through the substance
Therefore, the concentration "c" can be calculated from the absorbance of the substance
as the other factors are constant.
Photometric chemical analysis is based on specific chemical reactions between a
sample and reagent to produce a light‑absorbing compound.
5.3. PRECISION AND ACCURACY
Precision is how closely repeated
measurements are to one another.
Precision is usually expressed as
standard deviation (SD).
Accuracy is defined as the
closeness of a test result to the
true value.
Although good precision suggests
good accuracy, precise results can
be inaccurate. The figure explains
these definitions.
For each method, the accuracy is expressed in the related measurement section.

9
DESCRIPTION
Instrument Block Diagram
The internal reference system (reference detector) of the HI97734 photometer
compensates for any drifts due to power fluctuations or ambient temperature changes,
providing a stable source of light for your blank (zero) measurement and sample
measurement.
LED light sources offer superior performance compared to tungsten lamps. LEDs have
a much higher luminous efficiency, providing more light while using less power. They
also produce little heat, which could otherwise affect electronic stability. LEDs are
available in a wide array of wavelengths, whereas tungsten lamps have poor blue/
violet light output.
Improved optical filters ensure greater wavelength accuracy and allow a brighter,
stronger signal to be received. The end result is higher measurement stability and less
wavelength error.
A focusing lens collects all of the light that exits the cuvette, eliminating errors from
cuvette imperfections and scratches, eliminating the need to index the cuvette.
5.5. OPTICAL SYSTEM
GENERAL OPERATIONS
6.1. METER VALIDATION: CAL CHECK / CALIBRATION
Validation of the HI97734 involves verifying the concentration of the certified CAL
Check standards. The CAL Check screen guides the user step‑by‑step through the
validation process and user calibration (if necessary).
WARNING: Do not use any solutions/standards other than the Hanna®CAL Check
Standards. For accurate validation and calibration results, please perform these at
room temperature (18 to 25 °C; 64.5 to 77.0 °F).
Note: CAL Check Standards will not read the specified value in measurement mode.
Protect the CAL Check cuvettes from direct sunlight by keeping them in the original
packing. Store between +5 °C and +30 °C (41 - 86 °F), do not freeze.
6. GENERAL OPERATIONS

10
GENERAL OPERATIONS
To perform a CAL Check:
1. Press the key to enter menu. Use the 
keys to select CAL Check/Calibration and press
Select.
The “Not Available“ message or the date/time and
status of the last CAL Check will be displayed on the
screen.
2. Press the Check key to start a new CAL Check.
Press the key at any time to abort the validation process.
3. Use the keys to enter the certificate value
of the calibration standard found on the CAL Check
Standard Certificate. Press Next to continue.
Note: This value will be saved in the instrument for future validation. If a new
set of calibration standards is obtained please update the certificate value.
4. Insert the A ZERO CAL Check Cuvette A then press
Next to continue. The “Please Wait...“message
will be displayed during the measurement.
5. Insert the HI97734B CAL Check Cuvette B then press
Next to continue. The “Please Wait...“message
will be displayed during the measurement.
6. When the CAL Check is complete the display will
show one of the following messages and the value
obtained during the measurement:
‑ “PASSED“: The measured value is within the accuracy
specification, no user calibration is required.
‑ “OUT OF SPECIFICATION“ and the Calibration key is available: The measured
value is near the expected value. To update the user calibration press Calibrate.
Press Accept to confirm or Cancel to return to the previous screen.