Hanna Instruments HI 4421 User manual

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www.hannainst.com
HI 4421
DO/BOD/OUR/SOUR/Temperature
Bench Meter
Instruction Manual

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HI 4421 is warranted for two years against defects in workmanship and materials when used for their
intended purpose and maintained according to instructions. The probe is guaranteed for six months. This
warranty is limited to repair or replacement free of charge.
Damage due to accidents, misuse, tampering or lack of prescribed maintenance is not covered.
If service is required, contact the dealer from whom you purchased the instrument. 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 Technical Service Department and
then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packed for
complete protection.
To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of
purchase.
Dear Customer,
Thank you for choosing a Hanna Instruments product. This manual will provide you with the necessary
information for correct use of the instrument.
Please read this instruction manual carefully before using the instrument.
If you need additional technical information, do not hesitate to e-mail us at [email protected] or see the
back side of this manual for our worldwide sales and technical service contacts.
These instruments are in compliance with directives.
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY

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TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
WARRANTY ...................................................................................................................................... 2
PRELIMINARY EXAMINATION .............................................................................................................. 4
GENERAL DESCRIPTION ...................................................................................................................... 4
FUNCTIONAL DESCRIPTION ................................................................................................................ 5
SPECIFICATIONS ................................................................................................................................ 7
OPERATIONAL GUIDE ....................................................................................................................... 8
DISPLAYING MODES ......................................................................................................................... 9
SYSTEM SETUP............................................................................................................................... 12
DO SETUP......................................................................................................................... 18
BOD SETUP............................................................................................................................. 29
OUR SETUP.............................................................................................................. 31
SOUR SETUP.............................................................................................................. 33
DO CALIBRATION.............................................................................................................. 35
PRESSURE CALIBRATION.............................................................................................................. 37
DO MEASUREMENT.............................................................................................................. 38
BOD MEASUREMENT.............................................................................................................. 42
OUR MEASUREMENT ............................................................................................... 45
SOUR MEASUREMENT.............................................................................................................. 46
LOGGING ....................................................................................................................................... 47
PC INTERFACE .................................................................................................................................... 52
PROBE CONDITIONING & MAINTENANCE ..................................................................................... 52
TROUBLESHOOTING GUIDE .............................................................................................................. 53
ACCESSORIES .................................................................................................................................. 54

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Remove the instrument from the packing material and examine it carefully to make sure that no damage has
occurred during shipping. If there is any damage, notify your dealer or the nearest Hanna Service Center.
The meter is supplied complete with:
•HI 76408 DO probe for laboratory use with built-in temperature sensor
•HI 7041S Electrolyte solution (30 mL)
•HI 76407A Membrane caps (2 pcs)
•HI 76404N Electrode Holder
• 12Vdc Power Adapter
• Instruction Manual
HI 4421 is supplied with 12 Vdc/230 Vac adapter.
HI 4421-01 is supplied with 12 Vdc/115 Vac adapter.
Note: Save all packing material until you are sure that the instrument works properly. Any defective item
must be returned in the original packing with the supplied accessories.
HI 4421 is a professional bench meter with color graphic LCD for DO, BOD, OUR, SOUR and temperature
measurements.
The display viewing modes are: Basic information only, GLP information, Graph and Log History mode.
The main features of the instruments are:
• One input channel;
• Six measurement parameters: DO, BOD, OUR, SOUR, pressure and temperature;
• Automatic or user standard DO calibration;
• AutoHold feature to freeze the stable reading on the LCD (DO only);
• Two selectable alarm limits (for DO, BOD, OUR, SOUR);
• Three selectable logging modes: Automatic logging, Log on demand (manual logging) and AutoHold logging
mode (DO only);
• Up to 100 logging lots for automatic or manual modes, up to 200 OUR and SOUR reports and up to 200 BOD
method information entries;
• Selectable area and settable sampling period feature for automatic logging;
• GLP feature;
• Online and offline graph;
• User-friendly interface on large color graphic LCD (240x320 pixels);
• Opto-isolated PC interface via RS232 respectively USB.
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION

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HI 4421 DESCRIPTION
FRONT PANEL
REAR PANEL
1) Liquid Crystal Display (LCD)
2) Main Keyboard
3) USB connector
4) ON/OFF switch
5) Power adapter socket
6) RS232 serial communication connector
7) DO probe input
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION

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KEYBOARD DESCRIPTION
FUNCTION KEYS
VIRTUAL KEYS
The upper row keys are assigned to the virtual keys placed on the bottom of the LCD, which allow you to
perform the displayed function, depending on the current menu (e.g. and
in Measure
mode).
LCD GENERAL DESCRIPTION
To enter / exit calibration mode.
To select the desired measurement mode: DO, BOD, OUR, SOUR.
To enter Setup (System Setup, DO Setup, BOD Setup , OUR Setup or SOUR Setup) and to
access Log Recall function.
To obtain general informations about the selected option / operation.

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SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
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POWER CONNECTION
Plug the 12 Vdc adapter into the power supply socket.
Note: These instruments use non volatile memory to retain the meter settings, even when unplugged.
PROBE CONNECTION
For DO, BOD, OUR or SOUR measurements connect a DO probe to the DIN connector located on the rear panel
of the instrument.
INSTRUMENT START UP
• Turn the instrument on from the power switch located on the rear panel of the instrument.
• Please wait until the instrument finishes the initialization process.
Note: It is normal for the loading process to take a few seconds. If the instrument doesn’t display the next
screen, restart the meter using the power switch. If the problem persists, contact your dealer.
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE

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For each measurement mode (DO, BOD, OUR or SOUR) the following display configurations are available:
Basic, Good Laboratory Practice (GLP), Graph and Log History.
Basic
Accessing this option, the measured value and its units are
displayed on the LCD, along with the temperature value, tempera-
ture compensation mode, pressure value, pressure compensation
mode and minimal GLP data.
To choose the Basic displaying mode:
• Press while in
Measure mode. The “Choose Display
Configuration” message will be displayed in the Reminder
messages area.
• Press . The instrument will display the basic informa-
tion for the selected measurement mode.
GLP
Accessing this option, a detailed GLP data will be displayed on the
LCD for DO
measure modes: Last Calibration Date and Time,
Sample ID, Buffer Value, Pressure Value, Salinity Value, Tem-
perature Value, Temperature Compensation, the Date and Time.
To access the GLP displaying mode:
• Press while in
Measure mode. The “Choose Display
Configuration” message will be displayed in the Reminder
messages area.
• Press . The instrument will display the detailed GLP
data.
DISPLAYING MODESDISPLAYING MODES
DISPLAYING MODESDISPLAYING MODES
DISPLAYING MODES

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Graph
Accessing this option, the online graph with currently logged
values (DO, BOD, OUR or SOUR vs. Seconds) could be displayed.
If there is no active log, the previously logged data for the
selected parameter will be plotted.
Notes: • If no data were logged, the graph displaying mode
will not be accessible.
• If no automatic log is saved, the offline graph will not
be available.
To access the offline / online graph:
• Press while in
Measure mode. The “Choose Display
Configuration” message will be displayed in the Reminder
messages area.
• Press .
When the online graph is displayed:
• Use and to move the graph along the horizontal ( Time ) axis.
• Press to access the zoom menu for the vertical ( Parameter ) axis. Use or for
vertical axis zooming.
• Press to return to the main menu.
When the offline graph is displayed:
• Use the arrow keys to move the graph along the horizontal and vertical axes.
• Press to access the zoom menu for the horizontal and vertical axes. Use or /
/ / to switch between the active zooming axes. Press or
to zoom the selected axis.
Note: While in zoom graph menu the key is not accessible.
• Press to return to the main menu.