Hanna Instruments HI 4521 User manual

1
HI 4521 & HI 4522
pH/mV/ISE/Temperature/
Conductivity/Resistivity/TDS/Salinity
Bench Meters
Instruction Manual
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

2115
OTHER ACCESSORIES
HI 710005/8 Voltage adapter from 115 VAC / 12 VDC 800 mA (USA plug)
HI 710006/8 Voltage adapter from 230 VAC / 12 VDC 800 mA (European plug)
ChecktempC Pocket-size thermometer (range –50.0 to 150.0 ºC)
HI 76404N Electrode holder
HI 8427 pH and ORP electrode simulator with 1 m (3.3') coaxial cable ending in female BNC
connectors
HI 931001 pH and ORP electrode simulator with LCD and 1 m (3.3') coaxial cable ending in female BNC
connectors
HI 76312 Platinum 4-ring conductivity/TDS probe with temperature sensor and 1 m (3.3') cable
HI 7662-T Temperature probe with 1 m (3.3') cable
HI 92000 Windows®compatible software
HI 920010 9 to 9-pin RS232 cable
RECOMMENDATIONS FOR USERS
Before using these products, make sure they are entirely suitable for the environment in which they are used.
Operation of these instruments in residential areas could cause unacceptable interferences to radio and TV
equipment, requiring the operator to follow all necessary steps to correct interferences.
The glass bulb at the end of the pH electrode is sensitive to electrostatic discharges. Avoid touching this glass
bulb at all times.
During operation, ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic
discharges.
Any variation introduced by the user to the supplied equipment may degrade the instruments’ EMC
performance.
To avoid electrical shock, do not use these instruments when voltages at the measurement surface exceed
24 VAC or 60 VDC.
To avoid damage or burns, do not perform any measurement in microwave ovens.

ORP ELECTRODES
HI 3131B
Glass-body, refillable, combination platinum ORP electrode.
Use: titration.
HI 3230B
Plastic-body, gel-filled, combination platinum ORP electrode.
Use: general purpose.
HI 4430B
Plastic-body, gel-filled, combination gold ORP electrode.
Use: general purpose.
Consult the Hanna General Catalog for more electrodes with screw-type or BNC connectors.
EXTENSION CABLE FOR SCREW-TYPE ELECTRODES
(SCREW TO BNC ADAPTER)
HI 7855/1 Extension cable 1 m (3.3') long
HI 7855/3 Extension cable 3 m (9.9') long
3
HI 4521 and HI 4522 are warranted for two years against defects in workmanship and materials when used
for their intended purpose and maintained according to instructions. Electrodes and probes are 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.
These instruments are in compliance with directives.
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
114

4
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
WARRANTY ...................................................................................................................................... 3
PRELIMINARY EXAMINATION .............................................................................................................. 5
GENERAL DESCRIPTION ...................................................................................................................... 6
FUNCTIONAL DESCRIPTION ................................................................................................................ 7
SPECIFICATIONS ................................................................................................................................ 9
OPERATIONAL GUIDE ....................................................................................................................... 12
DISPLAYING MODES ......................................................................................................................... 14
SYSTEM SETUP ............................................................................................................................... 17
pH SETUP ...................................................................................................................................... 23
mV SETUP ..................................................................................................................................... 36
ISE SETUP (HI 4522 only) .............................................................................................................. 37
pH CALIBRATION ................................................................................................. 43
pH MEASUREMENT ................................................................................................. 47
mV & RELATIVE mV MEASUREMENTS ................................................................................................ 49
ISE CALIBRATION (HI 4522 only) ........................................................................ 51
ISE MEASUREMENT (HI 4522 only) ........................................................................ 55
CONDUCTIVITY SETUP ......................................................................................................................... 64
RESISTIVITY SETUP ............................................................................................................................. 79
TDS SETUP .............................................................................................................. 81
SALINITY SETUP .............................................................................................................. 83
CONDUCTIVITY CALIBRATION.................................................................................. 85
CONDUCTIVITY MEASUREMENT.................................................................................. 87
RESISTIVITY MEASUREMENT .................................................................................. 90
TDS MEASUREMENT ............................................................................................... 91
SALINITY CALIBRATION .................................................................................. 92
SALINITY MEASUREMENT .................................................................................. 92
TEMPERATURE CALIBRATION .................................................................................. 94
LOGGING ....................................................................................................................................... 95
PC INTERFACE .................................................................................................................................... 100
pH BUFFER TEMPERATURE DEPENDENCE .......................................................................................... 101
PROBE CONDITIONING & MAINTENANCE ..................................................................................... 102
ELECTRODE CONDITIONING & MAINTENANCE ..................................................................................... 103
TROUBLESHOOTING GUIDE ..............................................................................................................105
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ...................................................................... 107
ACCESSORIES .................................................................................................................................. 108
113
FC 200B
Plastic-body, open junction, conic, Viscolene, non-refillable, combination pH electrode.
Use: meat & cheese.
FC 210B
Glass-body, double junction, conic, Viscolene, non-refillable, combination pH electrode.
Use: milk, yogurt.
FC 220B
Glass-body, triple-ceramic, single junction, refillable, combination pH electrode.
Use: food processing.
FC 911B
Plastic-body, double junction, refillable with built-in amplifier, combination pH electrode.
Use: very high humidity.

5
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.
The meters are supplied complete with:
•HI 1131B Glass-body Combination pH Electrode
•HI 76312 Four-ring Conductivity Probe with built-in temperature sensor and ID
•HI 7662-T Temperature probe
•pH 4.01 & 7.01 Buffer solutions, 20 mL each
•HI 700661 Cleaning solution, 2 x 20 mL
•HI 7071S Electrolyte solution
•HI 76404N Electrode Holder
•12 Vdc Power Adapter
•Instruction Manual
HI 4521 and HI 4522 are supplied with 12 Vdc/230 Vac adapter.
HI 4521-01 and HI 4522-01 are 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.
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
112
HI 2031B
Glass-body, semimicro, conic, refillable, combination pH electrode.
Use: semisolid products.
HI 1332B
Plastic-body, double junction, refillable, combination pH electrode.
Use: general purpose.
HI 1413B
Glass-body, single junction, flat tip, Viscolene, non-refillable, combination pH electrode.
Use: surface measurement.
FC 100B
Plastic-body, double junction, refillable, combination pH electrode.
Use: general purpose for food industry.

6
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
HI 4521 and HI 4522 are professional bench meters with color graphic LCD for pH, ORP (Oxidation Reduction
Potential), ISE (HI 4522 only), conductivity, resistivity, TDS, salinity and temperature measurements.
The display can be configured as a single channel or dual channel display in various modes: Basic information
only, GLP information, Graph and Log History mode.
The main features of the instruments are:
•Two input channels;
•Eight measurement parameters: pH, mV, ISE (HI 4522 only), conductivity, resistivity, TDS, salinity and
temperature;
•Manual selection, automatic and semiautomatic pH calibration in up to five points, with standard (1.68,
3.00, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45) and custom buffers (up to 5 custom buffers);
•Manual Selection and Custom Standard ISE calibration in up to five points, with standard (up to five standard
solutions for each measurement unit) and custom solutions (up to 5 custom solutions), with or without
temperature compensation (HI 4522 only);
•Pure water checking using the USP <645> standard;
•Conductivity probe automatic recognition;
•Automatic or custom standard conductivity calibration in up to four points, probe offset calibration;
•One fixed point salinity calibration (Percent Scale only);
•AutoHold feature to freeze first stable reading on the LCD;
•Two selectable alarm limits (for pH, mV, ISE, conductivity, resistivity, TDS, salinity);
•Three selectable logging modes: Automatic, Manual, AutoHold logging;
•Up to 100 logging lots for automatic or manual modes and up to 200 USP reports, up to 100 ISE methods
reports;
•Selectable area and sampling period feature for automatic logging;
•GLP feature;
•Online and offline graph;
•User-friendly interface on large color graphic LCD (240 x 320 pixels);
•Opto-isolated PC interface via RS232, respectively USB.
111
HI 1131B
Glass-body, single junction, refillable, combination pH electrode.
Use: general purpose.
HI 1330B
Glass-body, semimicro, single junction, refillable, combination pH electrode.
Use: laboratory, vials.
HI 1331B
Glass-body, semimicro, single junction, refillable, combination pH electrode.
Use: flasks.
HI 1230B
Plastic-body, double junction, gel-filled, combination pH electrode.
Use: general, field.

7
HI 4521/4522 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) Conductivity probe connector
8) Temperature probe socket
9) BNC electrode connector for pH/ORP/Ion measurements
10) Reference input socket
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
110
pH ELECTRODES
All electrodes part numbers ending in B are supplied with a BNC connector and 1 m (3.3') cable, as shown
below:
HI 1043B
Glass-body, double junction, refillable, combination pH electrode.
Use: strong acid/alkali.
HI 1053B
Glass-body, triple ceramic, conic shape, refillable, combination pH electrode.
Use: emulsions.
HI 1083B
Glass-body, micro, Viscolene, non-refillable, combination pH electrode.
Use: biotechnology, micro titration.

8
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).
Note:All the virtual keys are assigned to the focused channel (with key exception).
LCD GENERAL DESCRIPTION
To enter/exit calibration mode;
To select the desired measurement mode, pH, mV, Rel mV,ISE (HI 4522 only), Conductivity,
Resistivity, TDS, Salinity;
To enter Setup (System Setup, pH Setup, mV Setup, ISE Setup (HI 4522 only), Conductivity
Setup, Resistivity Setup , TDS Setup or Salinity Setup) and to access Log Recall function;
To obtain general information about the selected option / operation.
109
HI 7035M 111800 µS/cm (µmho/cm), 230 mL bottle
HI 7035L 111800 µS/cm (µmho/cm), 500 mL bottle
HI 8035L 111800 µS/cm (µmho/cm), 500 mL FDA approved bottle
HI 7037L 100% NaCl sea water standard solution, 500 mL
ELECTRODE STORAGE SOLUTIONS
HI 70300L Storage Solution, 500 mL bottle
HI 80300L Storage Solution in FDA approved bottle, 500 mL
ELECTRODE AND PROBE CLEANING SOLUTIONS
HI 70000P Electrode Rinse Sachets, 20 mL, 25 pcs
HI 7061L General Purpose Solution, 500 mL bottle
HI 7073L Protein Cleaning Solution, 500 mL bottle
HI 7074L Inorganic Cleaning Solution, 500 mL bottle
HI 7077L Oil & Fat Cleaning Solution, 500 mL bottle
HI 8061L General Purpose Solution in FDA approved bottle, 500 mL
HI 8073L Protein Cleaning Solution in FDA approved bottle, 500 mL
HI 8077L Oil & Fat Cleaning Solution in FDA approved bottle, 500 mL
ELECTRODE REFILL ELECTROLYTE SOLUTIONS
HI 7071 3.5M KCl + AgCl Electrolyte, 4x30 mL, for single junction electrodes
HI 7072 1M KNO3Electrolyte, 4x30 mL
HI 7082 3.5M KCl Electrolyte, 4x30 mL, for double junction electrodes
HI 8071 3.5M KCl + AgCl Electrolyte in FDA approved bottle, 4x30 mL, for single junction electrodes
HI 8072 1M KNO3Electrolyte in FDA approved bottle, 4x30 mL
HI 8082 3.5M KCl Electrolyte in FDA approved bottle, 4x30 mL, for double junction electrodes
HI 8093 1M KCl + AgCl Electrolyte in FDA approved bottle, 4x30 mL
ORP PRETREATMENT SOLUTIONS
HI 7020L Test Solution 200-275 mV, 500 mL bottle
HI 7021L Test Solution 240 mV, 500 mL bottle
HI 7022L Test Solution 470 mV, 500 mL bottle
HI 7091L Reducing Pretreatment Solution, 500 mL
HI 7092L Oxidizing Pretreatment Solution, 500 mL

9
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
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ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES
pH BUFFER SOLUTIONS
HI 6001 pH 1.679 Buffer Solution, 500 mL bottle
HI 6003 pH 3.000 Buffer Solution, 500 mL bottle
HI 8004L pH 4.01 Buffer Solution in FDA approved bottle, 500 mL
HI 6004 pH 4.010 Buffer Solution, 500 mL bottle
HI 8006L pH 6.86 Buffer Solution in FDA approved bottle, 500 mL
HI 6068 pH 6.862 Buffer Solution, 500 mL bottle
HI 8007L pH 7.01 Buffer Solution in FDA approved bottle, 500 mL
HI 6007 pH 7.010 Buffer Solution, 500 mL bottle
HI 6091 pH 9.177 Buffer Solution, 500 mL bottle
HI 8009L pH 9.18 Buffer Solution in FDA approved bottle, 500 mL
HI 8010L pH 10.01 Buffer Solution in FDA approved bottle, 500 mL
HI 6010 pH 10.010 Buffer Solution, 500 mL bottle
HI 6124 pH 12.450 Buffer Solution, 500 mL bottle
CONDUCTIVITY BUFFER SOLUTIONS
HI 70033P 84 µS/cm (µmho/cm), 20 mL sachets (25 pcs.)
HI 7033M 84 µS/cm (µmho/cm), 230 mL bottle
HI 7033L 84 µS/cm (µmho/cm), 500 mL bottle
HI 8033L 84 µS/cm (µmho/cm), 500 mL FDA approved bottle
HI 70031P 1413 µS/cm (µmho/cm), 20 mL sachets (25 pcs.)
HI 7031M 1413 µS/cm (µmho/cm), 230 mL bottle
HI 7031L 1413 µS/cm (µmho/cm), 500 mL bottle
HI 8031L 1413 µS/cm (µmho/cm), 500 mL FDA approved bottle
HI 70039P 5000 µS/cm (µmho/cm), 20 mL sachets (25 pcs.)
HI 7039M 5000 µS/cm (µmho/cm), 230 mL bottle
HI 7039L 5000 µS/cm (µmho/cm), 500 mL bottle
HI 8039L 5000 µS/cm (µmho/cm), 500 mL FDA approved bottle
HI 70030P 12880 µS/cm (µmho/cm), 20 mL sachets (25 pcs.)
HI 7030M 12880 µS/cm (µmho/cm), 230 mL bottle
HI 7030L 12880 µS/cm (µmho/cm), 500 mL bottle
HI 8030L 12880 µS/cm (µmho/cm), 500 mL FDA approved bottle
HI 7034M 80000 µS/cm (µmho/cm), 230 mL bottle
HI 7034L 80000 µS/cm (µmho/cm), 500 mL bottle
HI 8034L 80000 µS/cm (µmho/cm), 500 mL FDA approved bottle

10
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TEMPERATURE CORRELATIONTEMPERATURE CORRELATION
TEMPERATURE CORRELATIONTEMPERATURE CORRELATION
TEMPERATURE CORRELATION
FORFOR
FORFOR
FOR pp
pp
pH SENSITIVE GLASSH SENSITIVE GLASS
H SENSITIVE GLASSH SENSITIVE GLASS
H SENSITIVE GLASS
Typical Electrode Life
Ambient Temperature 1 – 3 years
90 ºC (194 ºF) Less than 4 months
120 ºC (248 ºF) Less than 1 month
Alkaline Error
High concentrations of sodium ions interfere with readings in alkaline solutions. The pH at which the interference
starts to be significant depends upon the composition of the glass. This interference is called alkaline error and
causes the pH to be underestimated. Hanna’s glass formulations have the indicated characteristics.
1.0 Mol L-1 Na+
0.1 Mol L-1 Na+
Sodium Ion Correction for the Glass at 20-25 ºC (68-77 ºF)
Concentration pH Error
13.00
13.50
14.00
12.50
13.00
13.50
14.00
0.10
0.14
0.20
0.10
0.18
0.29
0.40
The resistance of glass electrodes partially depends on the temperature. The lower the temperature, the higher the
resistance. It takes more time for the reading to stabilize if the resistance is higher. In addition, the response time
will suffer to a greater degree at temperatures below 25 ºC (77 ºF).
Since the resistance of the pH electrode is in the range of 50 – 200 Mohm, the current across the membrane is in the pico
Ampere range. Large currents can disturb the calibration of the electrode for many hours.
For these reasons high humidity environments, short circuits and static discharges are detrimental to a stable
pH reading.
The pH electrode’s life also depends on the temperature. If constantly used at high temperatures, the
electrode life is drastically reduced.

11
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mV / pH / ISE CHANNEL

12
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.
ELECTRODE AND PROBE CONNECTIONS
For pH or ORP measurements connect a pH / ORP electrode with internal reference to the BNC connector
located on the rear panel of the instrument.
For ISE measurements (HI 4522) connect, an ISE electrode with internal reference to the BNC connector
located on the rear panel of the instrument.
For electrodes with a separate reference connect the electrode’s BNC to the BNC connector and the electrode’s
reference to the reference input socket.
For temperature measurements and automatic temperature compensation connect the temperature probe to the
appropriate socket (mV channel only).
For conductivity, resistivity, TDS or salinity measurements connect a conductivity 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
105
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TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDE
CONDUCTIVITY / RESISTIVITY / TDS / SALINITY CHANNEL

13
CHANNEL SELECTION
•Press while in Measure mode to access channel
selection menu. Four available options will be displayed:
Channel 1, Channel 2, or multi-channel with the first or the
second channel focused. The “Choose Channel Configura-
tion” message is displayed in the Reminder messages area
when is pressed.
•Select the desired option by pressing the appropriate key:
, , or . The instru-
ment will enter in the selected option Measure mode.
104
For AmpHelFor AmpHel
For AmpHelFor AmpHel
For AmpHel®®
®®
®electrodes:electrodes:
electrodes:electrodes:
electrodes:
If the electrode does not respond to pH changes, the battery run down and the electrode should be replaced.
MEASURE
Rinse the pH electrode tip with distilled water. Immerse the tip (bottom 4 cm /1½”) in the sample and
stir gently for a few seconds.
For a faster response and to avoid cross-contamination of the samples, rinse the electrode tip with a few drops
of the solution to be tested, before taking measurements.
STORAGE PROCEDURE
To minimize clogging and assure a quick response time, the glass bulb and the junction of pH electrode should
be kept moist and not allowed to dry out.
Replace the solution in the protective cap with a few drops of HI 70300 or HI 80300 Storage Solution or, in its
absence, Filling Solution (HI 7071 or HI 8071 for single junction and HI 7082 or HI 8082 for double junction
electrodes). Follow the Preparation Procedure on page 103 before taking measurements.
Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER.
PERIODIC MAINTENANCE
Inspect the electrode and the cable. The cable used for connection to the instrument must be intact and there
must be no points of broken insulation on the cable or cracks on the electrode stem or bulb. Connectors must
be perfectly clean and dry. If any scratches or cracks are present, replace the electrode. Rinse off any salt
deposits with water.
pH Probe Maintenance
For refillable electrodes:For refillable electrodes:
For refillable electrodes:For refillable electrodes:
For refillable electrodes:
Refill the reference chamber with fresh electrolyte (HI 7071 or HI 8071 for single junction or HI 7082 or
HI 8082 for double junction electrodes). Allow the electrode to stand upright for 1 hour. Follow the Storage
Procedure above.
pH CLEANING PROCEDURE
•
General Soak in Hanna HI 7061 or HI 8061 General Cleaning Solution for approximately ½ hour.
• Protein Soak in Hanna HI 7073 or HI 8073 Protein Cleaning Solution for 15 minutes.
• Inorganic Soak in Hanna HI 7074 Inorganic Cleaning Solution for 15 minutes.
•
Oil/grease Rinse with Hanna HI 7077 or HI 8077 Oil and Fat Cleaning Solution.
IMPORTANT: After performing any of the cleaning procedures, rinse the electrode thoroughly with distilled
water, refill the reference chamber with fresh electrolyte (not necessary for gel-filled electrodes) and soak the
electrode in HI 70300 or HI 80300 Storage Solution for at least 1 hour before taking measurements.

14
For each measurement mode (pH, mV, Rel mV, Ion, Conductivity, Resistivity, TDS or Salinity) 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, tem-
perature 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 infor-
mation for the selected measurement mode.
GLP
Accessing this option, a detailed GLP data will be displayed on
the LCD for pH / ISE: Last Calibration Date and Time, Offset and
Slope values, Calibration Buffers, Electrode Condition and for
conductivity / salinity: Last Calibration Date and Time, Calibra-
tion Standards, Cell Constant, Probe Offset, Reference Temperature,
Compensation Coefficient, Temperature Compensation.
Note:If only a one-point pH calibration is performed or the current
calibration does not include at least two consecutive standard
buffers of pH 4.01, 7.01 (6.86) and 10.01 (9.18) buffers, the
Electrode Condition will be unknown.
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
103
PREPARATION PROCEDURE
Remove the protective cap of the pH electrode.
DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal with electrodes. They will disappear
when rinsed with water.
During transport, tiny bubbles of air may form inside the glass bulb affecting proper functioning of the electrode.
These bubbles can be removed by “shaking down” the electrode as you would do with a glass thermometer.
If the bulb and/or junction is dry, soak the electrode in HI 70300 or HI 80300 Storage Solution for at least one hour.
For refillable electrodes:For refillable electrodes:
For refillable electrodes:For refillable electrodes:
For refillable electrodes:
If the filling solution (electrolyte) is more than 2½ cm (1”) below the fill hole, add HI 7082 or HI 8082 3.5M
KCl Electrolyte Solution for double junction or HI 7071 or HI 8071 3.5M KCl+AgCl Electrolyte Solution for
single junction electrodes.
For faster response, unscrew the fill hole screw during measurements.
ELECTRODE CONDITIONINGELECTRODE CONDITIONING
ELECTRODE CONDITIONINGELECTRODE CONDITIONING
ELECTRODE CONDITIONING
& MAINTENANCE& MAINTENANCE
& MAINTENANCE& MAINTENANCE
& MAINTENANCE

15
Graph
Accessing this option, the online graph with the currently logged
values (pH, mV, Rel mV, ISE respectively Conductivity, Resistiv-
ity, TDS, Salinity vs. Seconds) will 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:
•Useand to move the graph along horizontal ( Time ) axis.
•Press to access the zoom menu for the vertical ( Parameter )axis. Use or for
zooming vertical axis.
•Press to return to the main menu.
When the offline graph is displayed:
•Usethe arrow keys to move the graph along the horizontal and vertical axes.
•Press to access the zoom menu for horizontal and vertical axes. Use , or /
/ / respectively / / / 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.
102
MEASURE
Rinse the conductivity probe with distilled water. Immerse the tip (bottom 4 cm /1½”) in the sample and
stir gently for a few seconds.
For a faster response and to avoid cross-contamination of the samples, rinse the probe with a few drops of the
solution to be tested, before taking measurements.
PERIODIC MAINTENANCE
Inspect the probe and the cable. The cable used for connection to the instrument must be intact and there must
be no points of broken insulation on the cable. Connectors must be perfectly clean and dry. Rinse off any salt
deposits with water.
If more cleaning is required, remove the probe sleeve and clean the probe with a cloth or a nonabrasive
detergent. Make sure to reinsert the sleeve onto the probe properly and in the right direction. After cleaning
the probe, recalibrate the instrument.
The platinum rings are sustained with glass. Take great care while handling the probe.
IMPORTANT: After performing any of the cleaning procedures, rinse the electrode thoroughly with distilled
water.
PROBE CONDITIONING & MAINTENANCEPROBE CONDITIONING & MAINTENANCE
PROBE CONDITIONING & MAINTENANCEPROBE CONDITIONING & MAINTENANCE
PROBE CONDITIONING & MAINTENANCE

16
Log History
Accessing this option, last logged records will be displayed on the LCD.
The log history list also contains the appropriate main parameter
values, the logged temperature, the temperature compensation
source / mode, as well as the records time stamp.
To access the Log History 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 log history
regarding the selected measure mode.
Notes: •When an alarm condition is active, all logged records will have an exclamation mark (!).
•When a meter is in auto-hold, the logged records will have an “H” symbol.
•If another measure mode is selected, the Log History will be cleared.
•If the temperature unit is changed, all logged temperature values will be automatically displayed
in the new temperature unit.
101
pp
pp
pH BUFFER TEMPERATUREH BUFFER TEMPERATURE
H BUFFER TEMPERATUREH BUFFER TEMPERATURE
H BUFFER TEMPERATURE
DEPENDENCEDEPENDENCE
DEPENDENCEDEPENDENCE
DEPENDENCE
Temperature has an effect on pH. The calibration buffer solutions are affected by temperature changes to a
lower degree than normal solutions.
During calibration the instrument will automatically calibrate to the pH value corresponding to the measured
or set temperature.
During calibration the instrument will display the pH buffer value at 25 ºC.
PMET SREFFUBHp
Cº Kº Fº 976.1 000.3 010.4 268.6 010.7 771.9 010.01 454.21
0 372 23 076.1 270.3 700.4 289.6 031.7 954.9 613.01 973.31
5 872 14 076.1 150.3 200.4 949.6 890.7 193.9 542.01 871.31
01 382 05 176.1 330.3 000.4 129.6 070.7 823.9 081.01 589.21
51 882 95 376.1 910.3 100.4 798.6 640.7 372.9 811.01 997.21
02 392 86 576.1 800.3 400.4 878.6 720.7 222.9 260.01 126.21
52 892 77 976.1 000.3 010.4 268.6 010.7 771.9 010.01 054.21
03 303 68 386.1 599.2 710.4 158.6 899.6 731.9 269.9 682.21
53 803 59 886.1 199.2 620.4 248.6 989.6 801.9 919.9 821.21
04 313 401 396.1 099.2 730.4 738.6 389.6 960.9 188.9 879.11
54 813 311 007.1 099.2 940.4 438.6 979.6 040.9 748.9 438.11
05 323 221 707.1 199.2 260.4 438.6 879.6 410.9 718.9 796.11
55 823 131 517.1 399.2 670.4 638.6 979.6 099.8 397.9 665.11
06 333 041 427.1 599.2 190.4 938.6 289.6 969.8 377.9 244.11
56 833 941 437.1 899.2 701.4 448.6 789.6 849.8 757.9 323.11
07 343 851 447.1 000.3 321.4 058.6 399.6 929.8 647.9 112.11
57 843 761 557.1 200.3 931.4 758.6 100.7 019.8 047.9 401.11
08 353 671 767.1 300.3 651.4 568.6 010.7 198.8 837.9 300.11
58 853 581 087.1 200.3 271.4 378.6 910.7 178.8 047.9 809.01
09 363 491 397.1 000.3 781.4 088.6 920.7 158.8 847.9 918.01
59 863 302 708.1 699.2 202.4 888.6 040.7 928.8 957.9 437.01

17
The System Setup menu allows the user to customize the user interface, consult the meter information, set the
external serial communication interface and to restore the manufacturer settings.
Accessing System Setup
•Press while in
Measure mode.
•Press . The system setup options will be displayed
on the LCD.
To access a System Setup option:
•Use or to highlight the desired option.
•Press to access the selected option.
The following is a detailed description of the System Setup option
screen.
Beeper
This option allows the user to enable or disable the beeper. When the beeper is enabled, a specific beep will
be heard when the reading becomes stable, when an alarm condition is reached, when pressing a key or if
a wrong key is pressed.
Stability Indicator
When the reading becomes stable, the instrument delivers a medium beep only if this option is ON, along with the
“Stable” indicator on the LCD.
Alarm
If this option is ON, a continuous double beep will be heard each time the set limits in Measure mode are
exceeded, along with the “Alarm” indicator on the LCD.
Key Pressed
If this option is ON, a short beep will be heard each time a valid key is pressed.
Wrong Key
If this option is ON, a long beep will be heard when an incorrect key is pressed.
SYSTEM SETUPSYSTEM SETUP
SYSTEM SETUPSYSTEM SETUP
SYSTEM SETUP
100
PC INTERFACEPC INTERFACE
PC INTERFACEPC INTERFACE
PC INTERFACE
Data transmission from the instrument to the PC can be done with the HI 92000 Windows®compatible
software (optional). HI 92000 also offers graphing and on-line help feature.
Data can be exported to the most popular spreadsheet programs for further analysis.
HI 4521 and HI 4522 instruments have two available serial interfaces: RS232 and USB. The desired serial
interface can be selected from the settings window of the HI 92000 software.
If choosing the RS232 serial interface, use the optional Hanna HI 920010 cable connector to connect your
instrument to a PC. Make sure that your instrument is switched off and then plug one connector to the
instrument RS232 socket and the other one to the serial port of your PC.
Note:Other cables than HI 920010 may use a different configuration. In this case, communication between
instrument and PC may not be possible.
If choosing the USB serial interface, use a standard USB cable to connect your instrument to the PC.
For both serial interfaces, make sure that the instrument and the HI 92000 software have the same baud rate
and the appropriate communication port.

18
To set the Beeper:
•Use or to select the Beeper option.
•Press and use or to highlight the
desired beeper associated parameter you want to modify.
•Press and use or to highlight the
beeper status option.
•Press to confirm your selection and return to the Beeper
menu or press to return without changing.
Saving Confirmation
When enabling this option, a prompt will appear on the LCD alerting
the user to save the modified values by pressing , exiting
without saving by pressing or canceling the saving operation
and return to the editing mode by pressing . If disabled, the
modified values will be saved automatically.
To enable / disable the saving confirmation:
•Use or to select the Saving Confirmation option.
•Press and use or to choose enabled
/ disabled.
•Press to confirm your selection or press to
cancel operation.
GLP Data
This option allows the user to set general information which will appear in the log reports. The options can have
a max of 10 characters.
Operator ID – this option allows you to edit the name of the operator.
Instrument ID – this option allows you to edit an identification name/number for the instrument.
Company Name – this option allows you to edit the company name.
Additional Info 1 & Additional Info 2 – for general purpose notations.
99
highlighted lot. The “Please wait...” message will be dis-
played on the LCD for a short period. The user customised
report will be displayed on the LCD.
Note: For automatic logging only, it is possible to view the
plotted graph.
•Press to display the graph.
•By pressing it is possible to move the graph
along the horizontal or vertical axis with the arrow keys.
•If pressing while the graph is displayed, the
zoom menu for the horizontal and vertical axes will be
accessed. Press , or / /
/ / / /
/to switch between the active
zooming axes and then zoom in or out on the selected
axis by pressing the appropriate virtual key.
•Press to return to the previous menu at any time.
To delete lots:
•Press while in Log Recall mode.
•Press or to access delete or delete all mode.
Otherwise, press to return to Log Recall view mode.
•After selecting one of the deleting modes, use or
to select one lot and then press or
to delete the selected lot or all lots. The “Please
wait...” message will be displayed on the LCD until the
selected lot or all lots are deleted.
•Press and then press to exit deleting mode and
return to Log Recall view mode.
•Press to exit
Log Recall mode and return to Measure mode.
Note:Logged lots should also be deleted whenever “Please Delete
Old Log Files” or “Low Data Logging Space” message appears
on the LCD, in the Reminder messages area.

19
To set the GLP Data:
•Use or to select the
GLP Data option.
•Press and use or to highlight the
desired option.
•Press to edit the desired information. The Text Editor menu
will be displayed on the LCD.
•Enter the desired information by using and to
highlight the desired character. It is also possible to delete the last
character by positioning the cursor on the Backspace character ()
and pressing .
•Press to return to the GLP Data menu. If the Saving
Confirmation
is enabled, press to accept the modified
option, to escape without saving or to return
to the editing mode. Otherwise, the modified options are saved
automatically.
Date & Time
This option allows the user to set the current date & time and the format in which they appear.
Set Date and Time
This option allows you to set the current date (year/month/day) and time (hour/minute/second).
Notes: •Only years starting with 2000 are accepted.
•The time is set using the selected time format. For 12 Hour time format only, the AM/PM can also
be selected with or .
Set Time Format
This option allows you to choose between 12 Hour (AM/PM) time format and 24 Hour time format from the
displayed pop-up menu.
Set Date Format
This option allows you to choose the desired date format from 6 available options: DD/MM/YYYY; MM/DD/YYYY;
YYYY/MM/DD; Mon DD, YYYY; DD-MM-YYYY and YYYY-Mon-DD.
To set the Date & Time:
•Use or to select the
Date& Time option.
•Press and use or to highlight the desired option you want to modify.
98
set as Direct/AutoHold in order to use this logging mode.
To log data using this mode:
•Press while in Measure mode to start the logging session. The logged values are only the ones
frozen on the LCD, after was pressed and the stability criterion reached.
•To store another frozen value, press to return to normal logging mode and then again.
•To stop the logging session, press or / .
Notes:•For the automatic logging, if the maximum logging time (24h) has been reached, a warning pop-
up will be displayed on the LCD in order to stop the current log and start another one in a new lot.
•If 100 lots have been saved or maximum 10000 records have been manually stored, a warning
pop-up will be displayed on the LCD in order to delete one lot or to select a new lot for the
manual logging to log other records.
LOG RECALL
This feature allows the user to view all stored data. If no data were
logged, the “No records were found” message will be displayed on
the LCD in the Log Recall screen. Otherwise, the instrument will
display all the memorized lots in accordance with the selected option:
Automatic Log, Manual Log ISE Method Report (HI 4522), or USP
Report.
To view the memorized data:
•Press while in
Measure mode.
•Press . The “Choose Log Report Type” message will
be displayed in the Reminder messages area.
•Press , , , or to select
the desired Log / ISE/ USP Report type. All logged lots for the
selected Log Report type will be displayed on the LCD.
•To filter the displayed lots, press and then the
desired unit ( ,, (HI 4522),
, , or ). Only the se-
lected measurement unit lots will be displayed on the LCD.
•Select the desired lot with or and press
to display the logged / report data from the

20
•Press to confirm your selection. Use and
and then use to modify the value with
or (for Set Date and Time option). For the
other two options press to confirm your selection and
select one of the displayed formats with or .
•Press to confirm your selection and return to the Date
& Time
options.
•Press to return to the previous mode.
Notes: • For the Set Date and Time option, if the Saving Confirmation is
enabled,press toacceptthemodifiedoption,
toescapewithoutsavingor toreturntotheeditingmode.
Otherwise, the modified option is saved automatically.
• If the time is changed with more than one hour before
last pH/ION calibration, a pop-up warning will appear on the LCD, notifying the user that a date/time
conflict has occured and some time-dependent modes could work improperly (e.g.
Measure , GLP ,
Log ).
LCD Setup
This option allows the user to set the Contrast , the Backlight of the LCD and the Backlight Saver . The Contrast
parameter can be adjusted within 7 steps, while the Backlight parameter within 4 steps. The Backlight Saver can
be set from 1 to 60 minutes or it can be OFF (disabled). All the changes are visible on the LCD for each parameter.
Note:If the instrument backlight is turned off after the set period of
time, press any key to turn it back on.
To set the LCD Setup:
•Use or to select the LCD Setup option.
•Press and use key to highlight the desired
parameter.
•Use or to adjust the selected parameter.
•Press to return to the
System Setup menu with saving.
97
The “Logging”, sampling period and “AutoHold” indicators will be displayed on the LCD.
•To store another frozen value, press /again.
•To stop the logging session, press / .
LOGGING MODE 3
This logging mode can be used for any sample measurements. By
choosing this logging mode, / will be avail-
able in Measure mode.
To log data using this mode:
•Press while in Measure mode to manually log a
record. The “Logged” indicator will be displayed on the LCD.
•The records will be stored in one lot. In order to change the
logging lot, see the measured parameter setup for details, Log
option, New Lot generation.
LOGGING MODE 4
This logging mode can be used for multiple samples measurement. By choosing this logging mode,
/ and / will be available in Measure mode.
To log data using this mode:
•Press / while in Measure mode to manually log a record. Each value is logged at the time
when the key was pressed. When the measured value is frozen on the LCD by pressing /
and the stability criterion is reached, the logged value is the one that has been frozen on the LCD.
•To store another frozen value, press to return to normal logging mode and then again.
•The records will be stored in one lot. In order to change the logging lot, see the measured unit Setup for
details, Log option, New Lot generation.
LOGGING MODE 5
This logging mode can be used for multiple samples measurement. By choosing this logging mode,
and will be available in Measure mode.
Notes:•The or and or will be available in multichannel
Measure
mode, depending on the focused channel.
•If the Reading Mode option is set as Direct and the Logging Mode 5 session is started, a warning
pop-up will be displayed on the LCD, informing the user that the Reading Mode option must be