Hanna Instruments HI 4521 User Manual

SALES AND TECHNICAL SERVICE CONTACTSSALES AND TECHNICAL SERVICE CONTACTS

SALES AND TECHNICAL SERVICE CONTACTS

SALES AND TECHNICAL SERVICE CONTACTSSALES AND TECHNICAL SERVICE CONTACTS

Australia:

Tel. [phone] • Fax [phone]

China:

Tel. [phone] • Fax [phone]

Egypt:

Tel. & Fax [phone]

Germany:

Tel. [phone] • Fax [phone]

Greece:

Tel. [phone] • Fax [phone]

Indonesia:

Tel. [phone] • Fax [phone]

Japan:

Tel. [phone] • Fax [phone]

Korea:

Tel. [phone] • Fax [phone]

Malaysia:

Tel. [phone] • Fax [phone]

Instruction Manual

HI 4521 & HI 4522

pH/mV/ISE/Temperature/

Conductivity/Resistivity/TDS/Salinity

Bench Meters

Singapore:

Tel. [phone] • Fax [phone]

South Africa:

Tel. [phone] • Fax [phone]

Taiwan:

Tel. [phone] • Fax [phone]

Thailand:

Tel. [phone] • Fax [phone]

United Kingdom:

Tel. [phone] • Fax [phone]

USA:

Tel. [phone] • Fax [phone]

For e-mail contacts and a complete list of Sales and Technical offices, please see

www.hannainst.com

.

116

MAN4521

10/06

www.hannainst.com

1

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.

2 115

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.

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 [e-mail] or see the

back side of this manual for our worldwide sales and technical service contacts.
These instruments are in compliance with

directives.

WARRANTYWARRANTY

WARRANTY

WARRANTYWARRANTY

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

114

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.

3

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

TABLE OF CONTENTSTABLE 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

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.

4

113

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.

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

PRELIMINARY EXAMINATION

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

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 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.

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.

112

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.

5

GENERAL DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

GENERAL DESCRIPTIONGENERAL 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.

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.

6

111

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.

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

HI 4521/4522 DESCRIPTION

FRONT PANEL

REAR PANEL

HI 1083B

Glass-body, micro, Viscolene, non-refillable, combination pH electrode.
Use: biotechnology, micro titration.

110

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

7

KEYBOARD DESCRIPTION

FUNCTION KEYS

To enter/exit calibration mode;

To select the desired measurement mode, pH, mV, Rel mV, ISE (HI 4522 only), Conductivity,
Resistivity, TDS, Salinity;

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

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.

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. ,

Measure

mode).

Note: All the virtual keys are assigned to the focused channel (with

LCD GENERAL DESCRIPTION

key exception).

and in

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 KNO3 Electrolyte, 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 KNO3 Electrolyte 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

8

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ACCESSORIESACCESSORIES

ACCESSORIES

ACCESSORIESACCESSORIES

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

108

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONSSPECIFICATIONS

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TEMPERATURE CORRELATION

TEMPERATURE CORRELATIONTEMPERATURE CORRELATION

FOR FOR

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p

H SENSITIVE GLASS

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H SENSITIVE GLASSH SENSITIVE GLASS

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).

10

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.

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.

Sodium Ion Correction for the Glass at 20-25 ºC (68-77 ºF)
Concentration pH Error

0.1 Mol L-1 Na

1.0 Mol L-1 Na

+

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

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11

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OPERATIONAL GUIDE

OPERATIONAL GUIDEOPERATIONAL GUIDE

TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE

TROUBLESHOOTING GUIDE

TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE

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.

CONDUCTIVITY / RESISTIVITY / TDS / SALINITY CHANNEL

12

105

For AmpHelFor AmpHel

For AmpHel

For AmpHelFor AmpHel

®®

®

®®

electrodes: electrodes:

electrodes:

electrodes: electrodes:

CHANNEL SELECTION

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

• 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 Configura­tion” 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.

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

•

Protein

•

Inorganic

•

Oil/grease

Soak in Hanna HI 7061 or HI 8061 General Cleaning Solution for approximately ½ hour.
Soak in Hanna HI 7073 or HI 8073 Protein Cleaning Solution for 15 minutes.
Soak in Hanna HI 7074 Inorganic Cleaning Solution for 15 minutes.
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.

104

13

DISPLAYING MODESDISPLAYING MODES

DISPLAYING MODES

DISPLAYING MODESDISPLAYING MODES

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, tem­perature compensation mode, and minimal GLP data.

To choose the Basic displaying mode:

• Press
Configuration” message will be displayed in the Reminder

messages area.

• Press . The instrument will display the basic infor­mation 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, Calibra­tion 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
Configuration” message will be displayed in the Reminder

messages area.

• Press
data.

while in

. The instrument will display the detailed GLP

Measure

mode. The “Choose Display

Measure

mode. The “Choose Display

ELECTRODE CONDITIONINGELECTRODE CONDITIONING

ELECTRODE CONDITIONING

ELECTRODE CONDITIONINGELECTRODE CONDITIONING

& MAINTENANCE& MAINTENANCE

& MAINTENANCE

& MAINTENANCE& MAINTENANCE

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

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.

Storage Solution for at least one hour.

14

103

PROBE CONDITIONING & MAINTENANCEPROBE CONDITIONING & MAINTENANCE

PROBE CONDITIONING & MAINTENANCE

PROBE CONDITIONING & MAINTENANCEPROBE CONDITIONING & MAINTENANCE

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.

Graph

Accessing this option, the online graph with the currently logged
values (pH, mV, Rel mV, ISE respectively Conductivity, Resistiv­ity, 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
Configuration” message will be displayed in the Reminder

messages area.

• Press .

When the online graph is displayed:

• Use and to move the graph along horizontal (

while in

Measure

mode. The “Choose Display

Time

) axis.

IMPORTANT: After performing any of the cleaning procedures, rinse the electrode thoroughly with distilled
water.

102

• Press to access the zoom menu for the vertical (
zooming vertical axis.

• 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 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.

15

Parameter

) axis. Use or for

Log History

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

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.

pp

H BUFFER TEMPERATUREH BUFFER TEMPERATURE

p

H BUFFER TEMPERATURE

pp

H BUFFER TEMPERATUREH BUFFER TEMPERATURE

DEPENDENCEDEPENDENCE

DEPENDENCE

DEPENDENCEDEPENDENCE

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.

16

During calibration the instrument will display the pH buffer value at 25 ºC.

101

PC INTERFACEPC INTERFACE

PC INTERFACE

PC INTERFACEPC INTERFACE

SYSTEM SETUPSYSTEM SETUP

SYSTEM SETUP

SYSTEM SETUPSYSTEM SETUP

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.

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

• 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,
a wrong key is pressed.

while in

Measure

mode.

when pressing a key or if

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
exceeded, along with the “Alarm” indicator on the LCD.

Measure

mode are

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.

100

17

To set the Beeper:

• Use

• 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

or to select the Beeper option.

to return without changing.

highlighted lot. The “Please wait...” message will be dis­played 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 / /

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

• Press and use or to choose enabled
/ disabled.

• Press to confirm your selection or press
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
Instrument ID
Company Name

– this option allows you to edit the name of the operator.

– this option allows you to edit an identification name/number for the instrument.

– this option allows you to edit the company name.

Additional Info 1 & Additional Info 2

Saving Confirmation

– for general purpose notations.

option.

to

/ / / /
/ 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

• Press or to access delete or delete all mode.
Otherwise, press to return to

• 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

• Press to exit

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.

view mode.

Log Recall

Log Recall

mode.

mode and return to

Log Recall

view mode.

Measure

mode.

18

99