Hanna Instruments HI 3220 User Manual

Instruction Manual

HI 3220 HI 3221

HI 3222

Calibration Check

pH/mV/ISE/Temperature

Bench Meters

www.hannainst.com

1

Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the instruments.
This manual will provide you with the necessary information for correct use of

the instruments, as well as a precise idea of their versatility.
If you need additional technical information, do not hesitate to e-mail us at

[e-mail] or turn to the back cover for our worldwide contact list.
These instruments are in compliance with directives.

WARRANTYWARRANTY

WARRANTY

WARRANTYWARRANTY

The HI 322x series are guaranteed 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 problem. 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.

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

TABLE OF CONTENTSTABLE OF CONTENTS

WARRANTY .......................................................................................................................................... 2

PRELIMINARY EXAMINATION ................................................................................................................. 3

GENERAL DESCRIPTION ......................................................................................................................... 3

HI 3220, HI 3221 FUNCTIONAL DESCRIPTION ......................................................................................... 5

HI 3222 FUNCTIONAL DESCRIPTION ...................................................................................................... 6

HI 3220 SPECIFICATIONS ...................................................................................................................... 8

HI 3221 SPECIFICATIONS ...................................................................................................................... 9

HI 3222 SPECIFICATIONS . ................................................................................................................... 1 0

OPERATIONAL GUIDE ......................................................................................................................... 11

pH CALIBRATION ............................................................................................................................... 15

pH BUFFER TEMPERATURE DEPENDENCE .............................................................................................. 23

RELATIVE mV CALIBRATION ................................................................................................................ 24

ISE CALIBRATION HI 3221 AND HI 3222 ..... ............ ............ ............ ........... ............ ............ ............ ....... 25

GOOD LABORATORY PRACTICE (GLP) ..................................................................................................... 2 9

SETUP .............................................................................................................................................. 3 1

LOGGING ........................................................................................................................................... 43

mV AND TEMPERATURE CALIBRATION (for technical personnel only) ........................................................ 46

PC INTERFACE ................................................................................................................................... 49

TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS .......................................................................... 5 6

ELECTRODE CONDITIONING & MAINTENANCE ....................................................................................... 57

TROUBLESHOOTING GUIDE ................................................................................................................ 60

ACCESSORIES .................................................................................................................................... 6 1

2

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 Customer Service Center.

Each instrument is supplied with:

• HI 11 31 B Glass body combination double-junction pH electrode

• HI 7662-T stainless steel Temperature Probe with 1 m (3.3') Cable

• pH 4.01 & 7.01 Buffer Solutions (20 mL each)

• HI 700661 Cleaning solution (2x20 mL each)

• HI 7071S Electrolyte Solution

• HI 76404N Electrode Holder

• 12 Vdc Power Adaptor

• Instruction Manual

HI 322x are supplied with 12 Vdc/230 Vac power adapter
HI 322x-01 are supplied with 12 Vdc/115 Vac power adapter

Note: Save all packing material until you are sure that the instrument

functions correctly. All defective items must be returned in the original
packing with the accessories supplied.

GENERAL DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

GENERAL DESCRIPTIONGENERAL DESCRIPTION

The HI 322x instruments are state-of-the-art, professional bench pH meters
with graphical LCD, designed to provide laboratory results and accuracy.
They are provided with a series of new diagnostic features which add an
entirely new dimension to the measurement of pH, by allowing the user to
dramatically improve the reliability of the measurement:

• Single (HI 3220 and HI 3221) or dual (HI 3222) input channels

• 7 standard pH buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and

12.45) for calibration.

• pH calibration up to five calibration points (see instrument specifications).

• Custom calibration with up to five custom buffers.

• Messages on the graphic LCD for an easy and accurate calibration.

• Diagnostic features to alert the user when the electrode needs cleaning.

• User selectable “Outside Calibration Range” warning.

• User-selectable “Calibration Time Out” to remind when a new calibra-

tion is necessary.

Hanna Instruments reserves the right to modify the design,

construction and appearance of its products without advance notice.

3

Moreover, they offer an extended temperature range from –20 to 120 ºC
(–4 to 248 ºF), using HI 7662-T interchangeable temperature probes.
These instruments can also measure with ORP electrodes, thanks to their
capability to measure mV with a resolution up to 0.1 mV.
HI 3221 and HI 3222 can also measure with ISE electrodes on ppm scale. The
electrode type and unit selection capability (for HI 3222), the ion change
selection capability (for HI 3221) and the ISE calibration in up to five
calibration standard solutions make this instrument very useful for a large
range of concentration solutions measurements.
Other features include:

• Relative mV measurements

• Log on demand up to 400 samples

• Log interval with log on stability feature up to 600 records

• Auto Hold feature, to freeze first stable reading on the LCD

• GLP feature, to view last calibration data for pH, Rel mV or ISE

• PC interface

4

HI 3220, HI 3221HI 3220, HI 3221

HI 3220, HI 3221

HI 3220, HI 3221HI 3220, HI 3221

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

Front viewFront view

Front view

Front viewFront view

1) Liquid Crystal Display (LCD)

2) Function keys

3) MENU key, to change the function key at the bottom of the display

/ keys to manually increase/decrease the parameters or to scroll between

4)
the parameter list

5) SETUP key, to enter SETUP mode

6) RANGE key, to switch between pH and mV range (HI 3220); pH, mV and ISE
range (HI 3221)

7) HELP key to enter/exit contextual help

8) CAL key, to enter calibration mode

9) ESC to escape the current mode, exit calibration, setup, help, etc.

5

HI 3222HI 3222

HI 3222

HI 3222HI 3222

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

Front viewFront view

Front view

Front viewFront view

1) Liquid Crystal Display (LCD)

2) Function keys

3) CHANNEL keys to toggle between channels (Ch1 - pH, Ch2 - ISE)

/ keys to manually increase/decrease the parameters or to scroll between

4)
the parameter list

5) MENU key, to change the function key at the bottom of the display

6) RANGE key, to switch between pH and mV range (Ch1); ISE and mV range
(Ch2)

7) HELP key to enter/exit contextual help

8) CAL key, to enter calibration mode

9) ESC to escape the current mode, exit calibration, setup, help, etc.

6

Rear viewRear view

Rear view

Rear viewRear view

10) ON/OFF switch.

11 ) Power adaptor socket.

12) USB connector.

13) BNC electrode connector for channel two (HI 3222 only).

14) Temperature socket for channel two (HI 3222 only).

15) Reference electrode connector for channel two (HI 3222 only).

16) BNC electrode connector for channel one.

17) Temperature socket for channel one.

18) Reference electrode connector for channel one.

7

HI 3220 SPECIFICATIONSHI 3220 SPECIFICATIONS

HI 3220 SPECIFICATIONS

HI 3220 SPECIFICATIONSHI 3220 SPECIFICATIONS

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HI 3221 SPECIFICATIONSHI 3221 SPECIFICATIONS

HI 3221 SPECIFICATIONS

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HI 3222 SPECIFICATIONSHI 3222 SPECIFICATIONS

HI 3222 SPECIFICATIONS

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10

OPERATIONAL GUIDEOPERATIONAL GUIDE

OPERATIONAL GUIDE

OPERATIONAL GUIDEOPERATIONAL GUIDE

POWER CONNECTION

Plug the 12 Vdc adapter into the power supply socket.
Notes: • These instruments use non volatile memory to retain the pH, mV,

Ion calibrations and all other settings, when unplugged.

• Make sure a fuse protects the main line.

ELECTRODE AND PROBE CONNECTIONS

For pH or ORP measurements connect a combination pH/ORP electrode to the
BNC connector located on the rear panel of the instrument (16 – see page 7).

For ISE measurements (HI 3221 & HI 3222 only) connect a combination ISE
electrode to the BNC connector located on the rear panel of the instrument (16
for HI 3221 or 13 for HI 3222 – see page 7).

For half cell electrodes with a separate reference connect the electrode’s BNC to
the BNC connector and the electrode’s reference to the corresponding reference
input socket.

For temperature measurements and automatic temperature compensation
connect the temperature probe to the appropriate socket. HI 3222, two
channels instrument, use a proper temperature socket (14, 17 – see page 7)
for each channel. As the channels are fully isolated use 2 temperature probes
in order to view the independent temperature reading on each channel.

INSTRUMENT START UP

• Turn the instrument on from the power switch located on the rear panel

of the instrument (10 – see page 7).

• Wait until the instrument finishes the initialization process. During this

process the Hanna Instrument logo is displayed.

pH MEASUREMENTS

To take a pH measurement remove the electrode protective
cap and simply submerse the electrode and the tempera­ture probe 3 cm (1¼”) into the sample to be tested.

If necessary, press RANGE until the display changes to
the pH mode. Enter SETUP menu to select the pH
resolution.

In the HI 3222, press Channel if the ISE measurements
are displayed.

11

3 cm

Allow for the electrode to adjust and reading to stabilize (hourglass symbol
turns off).

On the pH screen are displayed:

• pH reading with the selected resolution.

• Temperature reading in the selected unit (ºC or ºF).

• Temperature compensation mode (MTC - manual, ATC - automatic).

While in MTC mode the indicate that the temperature can be
manually changed using ARROW keys.

• Electrode condition during the calibration day.

• The buffers used in last pH calibration (if feature is enabled in SETUP).

• Available function keys in accordance to the model.

In order to take more accurate pH measurements, make sure that the
instrument is calibrated (see page 15 for details).

It is recommended that the electrode is always kept wet and rinsed thoroughly
with the sample to be measured before use.
The pH reading is directly affected by temperature. For accurate pH
measurements, temperature must be taken into consideration. If the sample
temperature is different from the temperature at which the pH electrode
was kept, allow a few minutes to reach thermal equilibrium.
To use the instrument's Automatic Temperature Compensation feature, submerse
the temperature probe into the sample as close to the electrode as possible and
wait for a few seconds.

If manual temperature compensation (MTC) is desired, the temperature
probe must be disconnected from the instrument.

The display will show the default temperature of 25 ºC, the last measured
temperature reading, or the last set temperature, with the “MTC” indication.

The “MTC” indication and the symbol light up on the LCD to indicate that
the instrument is in MTC mode and the ARROW keys can be used to enter the
desired temperature value.

Note: When in MTC mode the user can press and hold an ARROW key, and

the instrument will start incrementing /decrementing the temperature
value. The instrument keeps measuring and the display is updated
periodically.

12

ORP MEASUREMENTS

To perform ORP measurements, connect an ORP electrode (see “Accessories“
section) to the instrument and turn it ON.

If necessary, enter the mV mode by pressing RANGE
until the display changes to mV.

Submerse the ORP electrode 3 cm (1¼”) into the sample
to be tested and wait a few seconds for the reading to
stabilize.

3 cm

Measurements are displayed with 0.1 mV resolution.
The “AT C” (or “MTC”) message is turned off because mV readings are not

temperature compensated.
For accurate ORP measurements, the surface of the electrode must be clean

and smooth. Pretreatment solutions are available to condition the electrode
and improve its response time (see “Accessories” section, page 61).

RELATIVE mV MEASUREMENTS

To enter Relative mV mode, press Rel mV function key while in mV measure-
ment mode. The relative mV reading will be displayed along with the Absolute
mV value and the current temperature readings.

The relative mV reading is equal to the difference between the absolute mV
input value and relative mV offset established in the relative mV calibration.

Note: If using the pH or ISE electrode while in mV mode, the instrument will
measure the mV generated by the electrode.

ISE MEASUREMENTS (HI 3221, HI 3222 only)

To perform ion concentration measurements, connect an ISE electrode (and
the corresponding reference if necessary) to the corresponding instrument
input and turn it ON.

On HI 3222 the instrument input must be Channel 2. Press Channel, if
necessary, to display ISE in top header.

13

On the HI 3221 enter the ISE mode by pressing RANGE until the display
changes to ISE.

Submerse the ISE electrode tip 3 cm (1¼”) into the
sample to be tested and wait for the reading to stabilize.

3 cm

The ISE reading will be displayed along with the current
temperature reading.

The “AT C ” (or “MTC”) message is turned off because ppm readings are not
temperature compensated.

In order to take accurate ISE measurements, make sure that the appropriate ISE
electrode type and ISE unit were set in SETUP menu (HI 3222 only), or the
proper ion charge and slope is set (HI 3221 only), and the instrument was
calibrated (see ISE CALIBRATION for details, page 25).

Notes: • When the reading is out of range, the display will flash the closest

full-scale value.

• The instrument will display “----” on the primary LCD if it is not

calibrated. Perform at least a single-point calibration in order to
take ISE measurements.

• Changing the selection in the SETUP menu for the ISE electrode or
the ion charge will require calibration.

TEMPERATURE MEASUREMENTS

Connect the HI 7662-T temperature probe to the appropriate socket. Immerse
the temperature probe into the sample and allow the reading on the secondary
LCD to stabilize.

Note: The temperature can be displayed in Celsius degrees (ºC) or in Fahrenheit

degrees (ºF) (see SETUP for details, page 31).

BACKLIGHT FEATURE

The instrument is provided with a Backlight feature. The Backlight levels can
be selected in the SETUP menu.

14

pp

H CALIBRATIONH CALIBRATION

p

H CALIBRATION

pp

H CALIBRATIONH CALIBRATION

It is recommended to calibrate the instrument frequently, especially if high
accuracy is required.

The pH range should be recalibrated:

• Whenever the pH electrode is replaced.

• At least once a week.

• After testing aggressive chemicals.

• When calibration alarm time out is expired - “CAL DUE” blinks (if feature

is enabled in SETUP).

• If “Outside Cal Range” message blinks during pH measurement (the

measurement range is not covered by current calibration, if this feature is
enabled in SETUP).

PROCEDURE

The HI 32xx family offers a choice of 7 standard buffers (1.68, 4.01, 6.86,

7.01, 9.18, 10.01 and 12.45 pH) and up to 5 custom buffers. The standard
pH buffers are temperature compensated during calibration. The custom, user
entered buffers are not temperature compensated during calibration.

When a custom buffer is selected during calibration, the “Custom” function
key is displayed on the LCD. Press Custom key in order to alter the value to the
actual pH value at the temperature of measurement. Use ARROW keys to
change the value within a ±1.00 pH window and then press Accept. Press
ESC to leave custom buffers value unchanged. Press Confirm.

For accurate pH measurements, it is recommended to perform a multipoint
calibration. At least a two-point calibration is required.

The instrument will automatically skip the buffers within ±0.2 pH window,
around one of the calibrated buffers.

• Pour small quantities of selected buffer solutions into clean beakers. For
accurate calibration use two beakers for each buffer solution, the first one for
rinsing the electrode and the second one for calibration.

• Remove the protective cap, open the fill hole and rinse the electrode with
some of the buffer solution to be used for the first calibration point.

FIVE-POINT CALIBRATIONFIVE-POINT CALIBRATION

FIVE-POINT CALIBRATION

FIVE-POINT CALIBRATIONFIVE-POINT CALIBRATION

• Immerse the pH electrode and the temperature
probe approximately 3 cm (1¼”) into a buffer solu­tion of your

9.18, 10.01, 12.45 or a custom buffer) and stir
the buffer gently. The temperature probe should be
close to the pH electrode.

choice (pH 1.68, 4.01, 6.86, 7.01,

3 cm

15

• Press CAL. The instrument will display the measured pH, the LCD first
expected buffer and the temperature reading.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, Confirm
function key is displayed.

• Press Confirm to confirm first point.

• The calibrated value and the second expected buffer value is then dis­played on the LCD.

• After the first calibration point is confirmed, immerse the pH electrode and
the temperature probe approximately 3 cm (1¾”) into the second buffer
solution and stir gently. The temperature probe should be close to the pH
electrode.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

16

• When the reading is stable and close to the selected buffer, the Confirm
function key is displayed.

• Press Confirm to confirm calibration.

• The calibrated value and the third expected buffer value will be dis­played.

• After the second calibration point is confirmed, immerse the pH electrode
and the temperature probe approximately 3 cm (1¾”) into a third buffer
solution and stir gently. The temperature probe should be close to the pH
electrode.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, the Confirm
function key is displayed.

• Press Confirm to confirm calibration.

Repeat this procedure with two additional pH buffers to encompass the entire
sample pH range.

17

FOUR, THREE or TWO-POINT CALIBRATION

• Proceed as described in “FIVE-POINT CALIBRATION” section.

• Press CAL or ESC after the appropriate accepted calibration point. The
instruments will return to measurement mode and will memorize the
calibration data.

SINGLE-POINT CALIBRATION

There are two selectable options for a single-point calibration:
Replace and Offset.

This option is configured in SETUP mode under the parameter First Point
Mode. In both cases the meter will alter the present calibration data in the
instrument. If “Replace” is selected a new calibration point will be added to
the existing data, and the slope is calculated. The slopes between current
buffer and nearest lower and higher buffers will be reevaluated.

If the “Offset” option is selected, an electrode offset correction is performed to
all buffer data keeping the existing slopes unchanged.

• Proceed as described in “FIVE-POINT CALIBRATION” section.

• Press CAL or ESC after the first calibration point was confirmed. The
instruments will memorize the single-point calibration data and will
return to measurement mode.

Notes: • Press MTC key to toggle between pH buffer selection and the

temperature reading during calibration while temperature probe
is disconnected (MTC mode).

• The displayed arrow is moving to the temperature value. Use

ARROW keys in order to change the temperature.

18

ERROR SCREENS
Wrong buffer

The calibration cannot be confirmed.

The pH reading is not close to the selected buffer. Select another buffer using
the ARROW keys or change the buffer.

Electrode Dirty/Broken alternatively with Buffer Contaminated
The calibration cannot be confirmed.

The offset of the electrode is not in the accepted range. Check if the electrode
is broken or clean it following the Cleaning Procedure (see page 59). Check the
quality of the buffer. If necessary, change the buffer.

Wrong slope

The calibration cannot be confirmed.

The evaluated slope is less than the lowest accepted value (80% of default
slope).

The evaluated slope is more than the highest accepted value (110 % of default
slope).

19

Wrong old slope

An inconsistency between new and previous (old) calibration is detected. Clear
old calibration parameters and initiate calibration from the current point. The
instrument will keep all confirmed values during current calibration.

Note: For single-point calibration the electrode condition is not displayed in

the measurement screen.

Each time a buffer is confirmed, the new calibration parameters replace the
older calibration parameters of the corresponding buffer.

If an additional single buffer calibration is added at a latter time, the new
buffer point will be added to the stored calibration.

If the existing stored calibration is full (five calibration points), after confirming
the calibration point, the instrument will ask which buffer will be replaced by
current buffer. On the Buffer line will be displayed the proposed buffer.

Press ARROW keys to select another buffer to be replaced.
Press Confirm to confirm the buffer that will be replaced.
Press CAL or ESC to exit mode. In this case, the buffer will not be entered.

Note: The replaced buffer is not removed from calibration list and it can be

selected for the next calibration points.

WORKING WITH CUSTOM BUFFERS

If at least one custom buffer was set in SETUP menu, it can be selected for calibration
by pressing the ARROW keys. The Custom function key will be displayed.

Press Custom if you want to adjust the buffer to its value at the current
temperature.

20

Use the ARROW keys to change the buffer value.

Press Accept to accept new value or ESC to exit mode.
Note: Custom buffer value can be adjusted within a ±1.00 pH window,

around the set value.

WORKING WITH MILI pH BUFFERS

HANNA millesimal pH buffers are ± .002 pH buffers formulated to correspond
to nominal pH values. (1.000, 2.000, 3.000, 4.010, 5.000, 6.000, 7.010,

8.000, 9.000, 10.010, 11.000, 12.000, 13.000 and 9 that fall between).

These buffers require the user to use the closest standard buffer and adjust it,
or to use custom buffers. With these buffers it is possible to closely bracket the
measurement range of interest and insure an accurate measurement.

The resolution of the meter must be set to 0.001 pH (see SETUP on page 31).
Eight buffers are stored in instrument for calibration.

If calibration is invoked using millesimal buffers, the calibration buffer can be
modified within a ±0.020 pH range in accordance with the label on the
calibration buffer.

Press Change to enter buffer adjust mode.

Use ARROW keys to change the buffer value.
Press Accept to accept new value or ESC to exit adjusting mode.

CLEAR CALIBRATION

Press Clear function key when displayed to clear previous calibrations.

21

The instrument will display “Calibration Cleared”.

All previous calibrations, are cleared and the instrument continues in calibra­tion mode. When new calibration points are confirmed, they are kept.

Note: If Clear calibration is invoked during the first calibration point, the

instrument returns to measurement mode with CAL DUE message flashing.

ELECTRODE CONDITION

The display is provided with an icon, and a numeric value (unless the feature
is disabled) which gives an indication of the electrode status after calibration.

The “cond” remains active until the end of the calibration day.

Note: The electrode condition is evaluated only if current calibration includes

at least two standard buffers.

CLEAN ELECTRODE WARNING

Each time pH calibration is performed, the instrument internally compares the
new calibration with the one previously stored.

When this comparison indicates a significant difference, the “Clean elec-
trode” warning message is displayed to advise the user that the pH electrode
may need to be cleaned (see ELECTRODE CONDITIONING & MAINTENANCE
section for details, page 57).

After cleaning, perform a new calibration.
Note: If the calibration data are cleared, the comparison is done with the

default values.

22

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 buffers. During calibration the instrument
will automatically calibrate to the pH value corresponding to the measured or
set temperature.

PMETSREFFUBHp

CºFº86.110.468.610.781.910.0154.21

023 76.110.489.631.764.923.0183.31

514 76.100.459.601.793.942.0181.31

0105 76.100.429

5195 76.100.409.650.772.921.0108.21

0286 86.100.488.630.722.960.0126.21

5277 86.110.468.610.781.910.0154.21

0368 8

5359 96.130.448.699.611.929.931.21

04401 96.140.448.689.670.988.989.11

54311 07.150.438.689.640.958.938.1

05221 17.160.438.689.610.928.907.11

55131 27.180.448.689.699.897.975.11

06041 27.190.448.689.679.877.944.11

56941 37.111.448.699.659.867.923.11

07851 47.121.458.699.639.857.912.11

57761 67.141.468.600.719.847.901.11

08671 77.161.478.610.798.847.900.11

58581 87.171.478

09491 97.191.488.630.758.857.928.01

6.120.458.600.741.969.992.21

.670.733.981.0199.21

.620.778.847.919.01

1

59302 18.102.498.640.738.867.937.01

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

23

RELATIVE RELATIVE

RELATIVE

RELATIVE RELATIVE

The relative mV value calibration may be used to perform a single point
calibration with an ORP standard or remove the contribution of the reference
electrode to display mV equivalent to a SHE.

• Press CAL when the instrument is in RELATIVE mV measurement mode.
The relative mV value and the temperature values are displayed.

• Use the ARROW keys if you want to change the displayed relative mV value.

• Press ZERO function key if you want Rel mV reading to be zero (Relative
mV offset equals the mV reading).

• When the reading is stable in mV range and the Relative mV offset is inside
the offset window (±2000 mV), the Confirm function key is displayed.

• Press Confirm to confirm relative mV calibration. The instrument will
return to measurement mode.

• If the absolute mV reading is out of range or the Relative mV offset is out
of the offset window, “Wrong relative offset” message is displayed.

mm

V CALIBRATIONV CALIBRATION

m

V CALIBRATION

mm

V CALIBRATIONV CALIBRATION

Change the input value or the Relative mV value to complete the calibra­tion process.

Note: If a Rel mV offset calibration exists, CLR function key is displayed.

Press CLR if you want Rel mV offset to be 0.0 mV.

24

II

SESE

CALIBRATION CALIBRATION

I

SE

CALIBRATION

II

SESE

CALIBRATION CALIBRATION

(HI (HI

3221 &3221 &

(HI

3221 &

(HI (HI

3221 &3221 &

It is recommended to calibrate the instrument frequently, especially if high
accuracy is required.

The ISE range should be recalibrated:

• Whenever the ISE probe or ion charge is changed.

• At least once a day.

• After testing aggressive chemicals.

• When calibration alarm time out is expired- “CAL DUE” warning blinks (if
feature is enabled).

Follow instructions for the individual electrode.
Due to electrode conditioning time, the electrode must be kept immersed a few

seconds to stabilize. The user will be guided step by step during calibration
with easy to follow messages on the LCD. This will make the calibration a simple
and error-free procedure.

PROCEDURE

Select the proper ISE probe in SETUP menu (only for HI 3222) or select the
proper Ion Charge slope (see SETUP for details, page 31).

Note: If the ISE probe has not been previously calibrated (at least one point),

the “----” will be displayed.

HI HI

HI

HI HI

3222 3222

3222

3222 3222

))

)

))

Pour small quantities of the buffer solutions into clean beakers. If possible, use
plastic beakers to minimize any EMC interferences.

For accurate calibration and to minimize cross-contamination, use two beakers for
each standard solution. One for rinsing the electrode and one for calibration.

The HI 3221 instrument offers a choice of six standard solutions: 0.1, 1, 10,
100, 1000, 10000 ppm and calibration up to 2 points. The HI 3222 offers
additional ranges for other concentration units. These cover 5 decades of
concentration. The HI 3222 permits a 5 point calibration. It is advised to
bracket expected ion concentration with your standards. For fluoride electrode
the 2 ppm standard is also available (HI 3222 only).

Remove the protective cap from the ISE electrode.

25

FIVE-POINT CALIBRATION (HI 3222 only)

Use part of this procedure for 2, 3 or 4 point calibration.
Press ESC.

• Immerse the ISE electrode approximately 2 cm (¾”) into

2 cm

the less concentrated standard solution and stir gently.

• Press CAL. The primary LCD will displays the ion concentration in the
selected unit or “---” if not calibrated and first standard value.

• If necessary, press the ARROW keys to select a different standard value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected standard, the Confirm
function key is displayed.

• Press Confirm to confirm calibration.

• The calibrated value and the second expected standard value will be
displayed.

• After the first calibration point is confirmed, immerse the ISE electrode
approximately 2 cm (¾”) into the second calibration solution.

• If necessary, press the ARROW keys to select a different standard value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected standard, the
Confirm function key is displayed.

• Press Confirm to confirm calibration.

• The calibrated value and the third expected standard value will be
displayed.

26

• After the second calibration point is confirmed, immerse the ISE electrode
approximately 2 cm (¾”) into the third calibration solution.

• If necessary, press the ARROW keys to select a different standard value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected standard, the Confirm
function key is displayed.

• Press Confirm to confirm calibration.

• The calibrated value and the fourth expected standard value will be
displayed.

• After the third calibration point is confirmed, immerse the ISE electrode
approximately 2 cm (¾”) into the fourth calibration solution.

• If necessary, press the ARROW keys to select a different standard value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected standard, the Confirm
function key is displayed.

• Press Confirm to confirm calibration.

• The calibrated value and the fifth expected standard value will be dis­played.

• After the fourth calibration point is confirmed, immerse the ISE electrode
approximately 2 cm (¾”) into the fifth calibration solution.

• If necessary, press the ARROW keys to select a different standard value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected standard, the Confirm
function key is displayed.

• Press Confirm to confirm calibration. The instrument stores the calibration
value and returns to normal measurement mode.

Note: The instrument will automatically skip the standard solutions used

during calibration.

27

ERROR SCREENS

Wrong standard

The calibration cannot be confirmed. Verify that the correct standard is selected.

The message appears if mV input is out of ±2000 mV range.

Wrong slope

The calibration cannot be confirmed.
This message is displayed if slope is out of the accepted range.
Slope under accepted value (30 % default slope). Verify that the correct

standard is selected.

Slope over accepted value (130 % default slope).

Wrong old slope

An inconsistency between present and previous (old) calibration is detected.
Clear old calibration parameters and proceed calibration from the current
point. The instrument will keep all confirmed values during current calibration.

The instrument will display “----” on the primary LCD if is not calibrated or
after all calibrations are cleared.

If “Clear” is pressed during the first calibration point, the instrument returns
to measurement mode.

Notes: • Press Temp function key to select temperature value to be changed

if the temperature probe is not connected;

• ISE range is not temperature compensated on this meter;

• Standards and samples should be at the same temperature.

28

GOOD LABORATORY PRACTICE (GLP)GOOD LABORATORY PRACTICE (GLP)

GOOD LABORATORY PRACTICE (GLP)

GOOD LABORATORY PRACTICE (GLP)GOOD LABORATORY PRACTICE (GLP)

GLP is a set of functions that allows storage and retrieval of data regarding the
maintenance and status of the electrode.

All data regarding pH, Rel mV or ISE calibration is stored for the user to review
when necessary.

EXPIRED CALIBRATION

The instrument is provided with a real time clock (RTC), in order to monitor
the time elapsed since the last pH calibration.

The real time clock is reset every time the instrument is calibrated and the
“expired calibration” status is triggered when the instrument detects a
calibration time out. The “CAL” “DUE” warning will start blinking to warn
the user that the instrument should be recalibrated.

The calibration time out can be set (see SETUP for details, page 31) from 1 to
7 days or can be disabled.

For example, if a 4 days time out has been selected, the instrument will issue
the alarm exactly 4 days after the last calibration.

However, if at any moment the expiration value is changed (e.g. to 5 days),
then the alarm will be immediately recalculated and appear 5 days after the
last calibration.

Notes: • When the instrument is not calibrated or calibration is cleared

(default values loaded) there is no “expired calibration”, and
the display always shows the “CAL” “DUE” warning blinking.

• When an abnormal condition in the RTC (Real Time Clock) is

detected, the instrument forces the “expired calibration” status.

LAST pH CALIBRATION DATA

The last pH calibration data is stored automatically after a successful calibration.
To view the pH calibration data, press GLP function key when the instru-

ment is in the pH measurement mode. If GLP function key is not displayed
press MENU key.

The instrument will display a lot of data including calibration buffer, offset,
slope, electrode condition.

Note: Buffers displayed in video inverse mode are from previous calibrations.
The custom buffers are marked with an “*” on the right side of the buffer value.
“No user calibration” message is displayed if all calibration are cleared or
the instrument was not calibrated in the pH range.

29

LAST RELATIVE mV CALIBRATION DATA

Last Relative mV calibration data is stored automatically after a successful
calibration.

To view the Relative mV calibration data, press GLP key while in Relative mV
measurement mode.

The instrument will display the Relative mV GLP information: calibration date,
time and offset.

LAST ISE CALIBRATION DATA

Last ISE calibration data is stored automatically after a successful calibration.
To view the ISE calibration data, press GLP function key while in ISE measure-

ment mode. If GLP function key is not displayed press MENU key.
The instrument will display the ISE calibration information: calibration date,

time, slope, calibration status and electrode type.

Notes: • Press ESC at any moment and the instrument will return to

measurement mode.

• If calibration has not been performed, the instrument displays

“No user calibration” message.

• The calibration standards from previous calibration are displayed
in video inverse mode.

30

SETUPSETUP

SETUP

SETUPSETUP

Setup mode allows viewing and modifying the measurement parameters.
These are general SETUP parameters for all the ranges and range specific

parameters.
The following table lists the general SETUP parameters, their valid range and

the factory default settings.

New Description Valid value Default
Backlight Backlight level 0 to 8 4
Contrast Contrast level 0 to 20 10
Date/Time

Time Format AM/PM or 24 hours 24 hours
Date Format DD/MM/YYYY YYYY/MM/DD

Language Message display Up to four English

language languages

Temperature ºC or ºF ºC
unit

AutoEnd Select AutoEnd Fast, Medium, Accurate Medium
Stability Stability Criteria

Log interval Select log interval Manual, AutoEnd, 5, 10, 30 s Manual

Beep ON Beeper Status Enabled or Disabled Disabled
Instrument ID Instrument identification 0000 to 9999 0000
Baud Rate Serial Communication 600, 1200, 1800, 9600 9600
Meter Displays general

information information

01.01.2006 to 12.31.2099 current
00:00 to 23:59 date/time

MM/DD/YYYY
YYYY/MM/DD
YYYY-MM-DD
Mon DD, YYYY
DD-Mon-YYYY
YYYY-Mon-DD

1, 2, 5, 10, 15, 30, 60, (Log on demand)
120, 180 min.

31

The following table lists the specific range parameters.

Item Description Valid value Default
Calibr. Number of days after Disable, 1 to 7 days Disable

Timeout Calibration warning
(pH & ISE) is displayed

First point Management of 1 Replace or offset Replace
mode (pH) point calibration

Custom buffer Custom buffer Max. 5 buffers No
(pH) setting

pH Resolution Set pH resolution 0.1, 0.01 0.01

display 0.001

View calibr. Display calibration Enable or disabled Enable
points (pH) points

Display out of calibr. Enable or disable Enable
range warning

ISE probe Type of ISE probe Custom or Standard (18) Fluoride
(HI 3222 only)

ISE unit User, ppt, g/L, ppm, mg/L ppm
(HI 3222 only) ppb, M, mol/L, mmol.L, % W/V

Ion Charge ±1, ±2 , none +1
(HI 3221 only)

To enter SETUP menu, press SETUP function key while in measuring mode.

If SETUP is not displayed press MENU key.

32

GENERAL PARAMETER SCREENS

Backlight

Focus on the

Press Modify.

Use / keys to change the intensity then press Accept to confirm.
Press ESC to leave without changing.

Contrast

Focus on the

Backlight

Contrast

item.

item.

Press Modify.
Use / keys to change contrast then press Accept to confirm.

Press ESC to leave without changing.

33

Date/Time

Focus on the

Press Modify.

Use / keys to select item.
Use ARROW keys to change focused values.
Press Accept to confirm new setting, or ESC to leave without changing.

Time Format

Focus on the

Date/Time

Time Format

item.

item.

Press function key to change the option.

Date Format

Focus on the

Press Modify.

Use ARROW keys to select date format then press Accept.
Press ESC to leave without changing.

Date Format

item.

34

Language

Focus on the

Use the desired function key to change the option. Wait until new language
is loaded. If language load fails the instrument will try to reload current
language.

If any language can’t be loaded, the instrument will work in safe mode. In
this mode all messages are displayed in English and Help is not available.

Temperature unit

Focus on the

Press the displayed function key in order to change the temperature unit.

Beep On

Focus on

Language

Temperature

Beep On

item.

unit item.

item.

Press the displayed function key to enable/disable beep.
When enabled, beep sounds as a short beep every time a key is pressed or

when the calibration can be confirmed.
A long beep alert that the pressed key is not active or a wrong condition is

detected while in calibration.

35

AutoEnd stability

Focus on

AutoEnd

item.

Press one of the displayed function keys to select the AutoEnd stability criteria.
Three options are available: Fast, Medium, Accurate.
For the pH range the stability criteria are different for different pH resolution

selected (Medium in 0.01 pH range is different than Medium in 0.001
range).

Log interval

Focus on

Log interval

Press Modify in order to change the option.

item.

Use the arrow keys in order to select an option.
If the selected option is Manual the Log on demand is selected.
If AutoEnd is selected the reading will be memorized only when is stable.
If a specific interval is selected, the reading is memorized at the start of the

specific interval.

36

Instrument ID

Focus on the

Press Modify.

Use ARROW keys to change the instrument ID.
Press Accept to confirm or ESC to exit without saving.

Baud Rate

Focus on the

Press Modify.

Instrument ID

Baud Rate

item.

item.

Use ARROW keys to select the desired communication baud.
Press Accept to confirm or ESC to exit.

Meter information

Focus on the

Press Select.

Meter Information

item.

37

The meter informations are displayed:

-firmware version

-language version

-mV and temperature factory calibration time/date

RANGE SPECIFIC PARAMETERS SCREENS

Calibration Timeout

Focus on the

Press Modify.

Calibration Timeout

item.

Use ARROW keys to set desired value.
Press Accept to confirm or ESC to return without saving.
Note: If enabled “CAL DUE” warning will be displayed, the set number of

days after calibration is over passed.

First point mode

Focus on the

Press the displayed function key in order to change the option.
First point mode refers to the behaviour of the instrument regarding “One

point calibration”.

First Point

item.

38

If Offset is set, after one point calibration the instrument evaluate the offset
and keep unchanged the slopes.

Custom Buffers

Focus on the

Press Modify.

Press Delete to delete focused buffer.

Press Add to add a new buffer to the list (max 5).
Press Modify to set custom buffer value.

Custom Buffers

item.

Use ARROW keys to change the value.
Press Accept to confirm custom buffer value or ESC to exit without saving.

pH Resolution

Focus on the

Press the displayed function key to change option

pH resolution

item.

39

View Calibration Points

Focus on the

Press the displayed function key to change option.
If option is enabled the calibration buffers corresponding to the last calibration

are displayed in the pH measurement screen.

Out of Cal-Range Warning

Focus on the

Press the displayed function key in order to change option.
If enabled, the “Out Cal Range” message will be displayed if the pH reading

is not within the calibration range.

Calibration Point

item.

Out of Cal-Range Warning

item.

ISE probe

Focus on the

Press Custom in order to set the parameters for a custom probe.
Press Standard in order to select one probe from the standard probes list.
If Custom is pressed:

ISE probe

item.

40

Use ARROW keys to focus on the parameter to be changed (“Change Slope”
or “Molar Weight”).

Focus on

Change Slope

Use ARROW keys in order to select the desired combination.
If None/-59.16 is selected the slope of the probe can be changed by pressing

Modify key.

Press Modify.

item.

Use ARROW keys to change the slope.
Press Accept to confirm or ESC to exit.

Focus on

Molar Weight

Press Modify in order to change molar weight.

Use ARROW keys to change the value. Press Accept to confirm or ESC to exit.

.

41

If Standard was pressed.

Use ARROW keys to focus on the desired electrode.
Press Accept to confirm setting or ESC to exit.
Press View to see probe parameters.

ISE unit

Focus on the

Press Modify.

ISE unit

item.

Use ARROW key to select unit.
Press Accept to confirm selection or ESC to exit.
Note:• If the unit is changed or “User” is selected a warning message will

be displayed to alert that the ISE range must be calibrated.

• If a new probe was selected or custom probe parameter are changed,
the ISE range must be calibrated.

42

LOGGINGLOGGING

LOGGING

LOGGINGLOGGING

This feature allows the user to log pH, Rel mV or ISE measurements. All logged
data can be transferred to a PC through the USB port.

The logging space includes 200, 300 or 400 records of Log on demand,
acoording to the model, and 600 records of Log interval (lot logging). The log
interval is organized in lots. A maximum of 100 lots are accepted. One lot can
occupy all the memory space available.

LOGGING THE CURRENT DATA

To store the current reading into memory, press LOG while in measurement mode.

The instrument will display for few seconds the record number and the amount
of the free log space.

If the LOG space is full, the “Log space is full” message will be displayed for
few seconds when Log key is pressed. Enter View Logged Data Mode and delete
records in order to free log space.

LOT LOGGING

Select the desired interval in SETUP as a timed interval or AutoEnd waits for
a stable value before logging.

Press the StartLog function key in order to start Log interval.

Press the StopLog function key in order to stop logging and close current lot.

43

Notes: • At Power Off the current lot is automatically closed.

• If the 600 records space or 100 lots are reached, the “Log
space is full” message will be displayed.

• Enter View Log Data mode and delete lots in order to free
space.

VIEW LOGGED DATA

Press the Recall function key to retrieve the information stored while in
measurement mode for the specific range. If the Recall function key is not
displayed press MENU key.
The Recall selection screen is displayed.

Press the corresponding function key to view the records.
If Man.Log is pressed, the list of records is displayed.

If no data were logged, the instrument will display “No Records” message.

Use ARROW keys to scroll between the records from the list.
Press Delete All to enter
Press Delete to enter
Press More to view more information of the focused record.

If More is pressed.

Delete All

Delete records

screen.

screen.

Use ARROW keys to scroll between complete log information.

44

If Delete is pressed.

Use ARROW key to focus the record to be deleted and then press Confirm.
Press ESC to exit.
If Delete All is pressed the instrumet asks for confirmation.
Press Confirm to confirm or ESC to exit without deleting.
If AutoLog is pressed.
The lot information of the specific range are displayed.

Use the ARROW keys to scroll the lots.
Press the Delete All function key to enter the Delete All lots screen.
Press the Delete function key to enter the Delete lot screen.
Press the More function key to view the records information of the focused lot.

If More is pressed.

45

mm

V V

andand

m

V

mm

V V

TEMPERATURE CALIBRATION TEMPERATURE CALIBRATION

and

TEMPERATURE CALIBRATION

andand

TEMPERATURE CALIBRATION TEMPERATURE CALIBRATION

(for technical personnel only)

All the instruments are factory calibrated for mV and temperature.
Hanna’s temperature probes are interchangeable and no temperature

calibration is needed when they are replaced.
If the temperature or ORP measurements are inaccurate, calibration should

be performed.
For an accurate recalibration, contact your dealer or the nearest Hanna

Customer Service Center, or follow the instructions below.

ENTER CALIBRATION MODE

With the instrument off, press and hold down the / then power on the
instrument.
Press either “Ch 1” or “Ch 2” function key to enter the corresponding calibra­tion screen.

The calibration screen is displayed. Press “T” function key to enter the tem­perature calibration mode.

TEMPERATURE CALIBRATION

• Prepare a vessel containing ice and water and another one containing hot
water (at approximately
the vessels to minimize temperature changes.

• Use a calibrated thermometer with a resolution of 0.1 ºC as a reference
thermometer. Connect the temperature probe to the appropriate socket.

50 ºC or 122 ºF). Place insulation material around

46

• Immerse the temperature probe or the pH probe including temperature
sensor into the vessel with ice and water as close as possible to the reference
thermometer. Allow a few seconds for the probe to stabilize.

• Use the ARROW keys to set the calibration point value to that of ice and
water mixture, measured by the reference thermometer. When the read­ing is stable and close to the selected calibration point, the Confirm
function key is displayed.

• Press Confirm to confirm.

• The second expected calibrated point is displayed.

• Immerse the temperature probe into the second vessel as close as possible to
the reference thermometer. Allow a few seconds for the probe to stabilize.

• Use the ARROW keys to set the calibration point value to that of the hot
water.

• When the reading is stable and close to the selected calibration point,
Confirm function key is displayed.

• Press Confirm to confirm. The instrument returns to measurement mode.

Note: Use ARROW keys to change calibration point if necessary (±10.0 ºC)

around the point.
If the reading is not close to the selected calibration point, “Wrong”

message will blink. Change the temperature probe and restart calibra­tion.

47

mV CALIBRATION

A two point calibration can be performed at 0 mV and 1800 mV.

• Attach to the BNC connector a mV simulator with an accuracy of ±0.1 mV.

• Enter the calibration screen. Press mV function key.

• Set 0.0 mV on the simulator.

• When the reading is stable and close to the selected calibration point, the
Confirm function key is displayed.

• Press Confirm to confirm. The second calibration point of 1800 mV will be
displayed.

• Set 1800.0 mV on the simulator.

• When the reading is stable and close to the selected calibration point, the
Confirm function key is displayed.

• Press Confirm to confirm. The instrument returns to calibration screen.

• Press ESC to return to measurement mode.

Notes:•If the reading is not close to the selected calibration point, “WRONG”

tag will blink. Verify calibration condition or contact your vendor if
you cannot calibrate.

•Press CAL or ESC in any moment of the calibration process. The

instrument will return in the measurement mode.

48

PC INTERFACEPC INTERFACE

PC INTERFACE

PC INTERFACEPC 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.
To connect your instrument to a PC, use an USB cable connector. Make sure

that your instrument is switched off and plug one connector to the instrument

USB socket and the other to the serial or USB port of your PC.
Note: • If you are not using Hanna Instruments HI 92000 software,

please see the following instructions.

SENDING COMMANDS FROM PC

It is also possible to remotely control the instrument with any terminal program.
Use an USB cable to connect the instrument to a PC, start the terminal program
and set the communication options as follows: 8, N, 1, no flow control.

COMMAND TYPES

To send a command to the instrument follow the next scheme:

<command prefix> <command> <CR>

where: <command prefix> is the 16 ASCII character

<command> is the command code.

Note: Either small or capital letters can be used.

SIMPLE COMMANDS

KF1 Is equivalent to pressing function key 1
KF2 Is equivalent to pressing function key 2
KF3 Is equivalent to pressing function key 3
RNG Is equivalent to pressing RANGE key
CAL Is equivalent to pressing CAL key
UPC Is equivalent to pressing the UP arrow key
DWC Is equivalent to pressing the DOWN arrow key
SET Is equivalent to pressing SETUP key (HI3220, HI3221)
MNU Is equivalent to pressing MENU key
ESC Is equivalent to pressing ESC key
CLR Is equivalent to pressing CLR key

49

CHRxx Change the instrument range according with the parameter

value (xx):

• xx=10 pH range/0.001 resolution on channel 1

• xx=11 pH range/0.01 resolution on channel 1

• xx=12 pH range/0.1 resolution on channel 1

• xx=13 mV range on channel 1

• xx=14 Relative mV range on channel 1

• xx=15 ISE range on channel 1 (HI 3221)

• xx=20 ISE range on channel 2 (HI 3222)

• xx=21 mV range on channel 2 (HI 3222)

• xx=22 Relative mV range on channel 2 (HI 3222)

The instrument will answer for these commands with:

<STX> <answer> <ETX>

where: <STX> is 02 ASCII code character (start of text)

<ETX> is 03 ASCII code character (end of text)
<answer>:
<ACK> is 06 ASCII code character (recognized command)
<NAK> is 21 ASCII code character (unrecognized command)
<CAN> is 24 ASCII code character (corrupted command)

COMMANDS REQUIRING AN ANSWER

The instrument will answer for these commands with:

<STX> <answer> <checksum> <ETX>
where the checksum is the bytes sum of the answer string sent as 2 ASCII characters.
All the answer messages are with ASCII characters.
RAS Causes the instrument to send a complete set of readings in

according with the current range:

• pH, temperature and mV reading on pH range.

• Rel mV, absolute mV and temperature reading on Rel
mV range.

• concentration, mV and temperature reading on ppm
range (HI 3221, HI 3222).

The answer string contains:

• Meter mode (2 chars):

• 10 pH range/0.001 resolution on channel 1

• 11 pH range/0.01 resolution on channel 1

• 12 pH range/0.1 resolution on channel 1

50

• 13 mV range on channel 1

• 14 Relative mV range on channel 1

• 15 ISE range on channel 1 (HI 3221)

• 20 ISE range on channel 2 (HI 3222)

• 21 mV range on channel 2 (HI 3222)

• 22 Relative mV range on channel 2 (HI 3222)

• Meter status (2 chars of status byte): represents a 8 bit
hexadecimal encoding.

• 0x10 - temperature probe is connected

• 0x01 - new GLP data available

• 0x02 - new SETUP parameter

• 0x04 - out of calibration range

• 0x08 - the meter is in autoend point mode

• Reading status (2 chars): R - in range, O - over range, U ­under range. First character corresponds to the primary
reading. Second character corresponds to mV reading.

• Primary reading (corresponding to the selected range) ­11 ASCII chars, including sign and decimal point and
exponent.

• Secondary reading (only when primary reading is not
mV) - 7 ASCII chars, including sign and decimal point.

• Temperature reading - 8 ASCII chars, with sign and two
decimal points, always in ºC.

MDR Requests the instrument model name and firmware code (16 ASCII

chars).

GLPx Requests the calibration data record.

• x=1 calibration data from channel 1

• x=2 calibration data from channel 2 (HI 3222)

The answer string contains:

• GLP status (1 char): represents a 4 bit hexadecimal encoding.

• 0x01 - pH calibration available

• 0x02 - Rel mV calibration available

• 0x04 - ISE calibration available

• pH calibration data if x=1 (if available), which contains:

• the number of calibrated buffers (1 char)

• the ion charge, with sign (2 chars) (HI 3221)

• the offset, with sign and decimal point (7 chars)

51

• the average of slopes, with sign and decimal point (7 chars)

• the calibration time, yymmddhhmmss (12 chars)

• buffers information (for each buffer)

• type (1 char): 0 - standard, 1 - custom

• status (1 char): N (new) - calibrated in last calibration;
O (old) - from an old calibration.

• warnings during calibration (2 chars): 00 - no

warning, 04 - Clean Electrode warning.

• buffer value, with sign and decimal point and expo­nent (11 chars).

• calibration time, yymmddhhmmss (12 chars).

• electrode condition, with sign (3 chars). The “-01”
code means not calculated.

• Rel mV calibration data (if available), which contains:

• the calibration offset, with sign (7 chars)

• the calibration time, yymmddhhmmss (12 chars).

• ISE calibration data (if available) when x=1 (HI 3221)
or when x=2 (HI 3222), which contains:

• the number of calibrated standards (1 char)

• the ion charge, with sign (2 chars) (HI 3221)

• the calibration slope, with sign and decimal point (7 chars)

• the calibration time, yymmddhhmmss (12 chars)

• standards information (for each standard)

• type (1 char): 0 - always standard solution.

• status (1 char): N (new) - calibrated in last calibration;

O (old) - from an old calibration.

• warnings during calibration (2 chars): 00 - no warning.

• standard value, with sign and decimal point and

exponent (11 chars).

• calibration time, yymmddhhmmss (12 chars).

PARx Requests the setup parameters setting.

• x=1 setup parameters for channel 1

• x=2 setup parameters for channel 2 (HI 3222)

The answer string contains:

• Backlight Value (1 ASCII char)

• Contrast Value (2 ASCII char)

• Instrument ID (4 chars)

• Calibration Alarm time out for pH (2 chars) when x=1

52

• Calibration Alarm timeout for ISE (2 chars) - if ISE

available when x=1 (HI 3221) or when x=2 (HI 3222)

• SETUP information (2 chars): 8 bit hexadecimal encoding.

• 0x01 - beep ON (else OFF)

• 0x04 - degrees Celsius (else degrees Fahrenheit)

• 0x08 - Offset calibration (else Point calibration)

• The number of custom buffers (1 char) when x=1

• The custom buffer values, with sign and decimal point,
for each defined custom buffer (7 chars) when x=1

• The ID of the ISE electrode (2 chars) - if ISE available
when x=1 (HI 3221) or when x=2 (HI 3222)

• The molar weight of the selected ION, with sign and
decimal point (9 ASCII characters) when x=1 (HI 3221)
or when x=2 (HI 3222)

• The electrode slope (6 ASCII chars)

• The ion charge (2 chars)

• The ISE unit (2 chars)

• The short name of the selected language (3 chars)

NSLxy Requests the number of logged samples (4 chars).

The command parameter (2 chars):

• x=1 request for channel 1

• x=2 request for channel 2

• y=P request for pH range when x=1

• y=M request for mV and Rel mV ranges

• y=I request for ISE range when x=1 (HI 3221) or

when x=2 (HI 3222)

LLSxy Requests the number of lots (information about lots) on the specified

channel and range (x - channelnumber; y - range number)

• xy = 11 - channel 1; range pH;

• xy = 13 - channel 1; range mV;

• xy = 22 - channel 2; range ISE;

• xy = 23 - channel 2; range mV;

The answer string contains:

• number of lots (3 chars)

• ID lot (3 chars)

• date (6 chars)

• time (6 chars)

53

• log type (2 chars)

GLDxxx Requests all records for the lot with ID=xxx

The answer string contains:

• Lot header data:

•logging interval (5 char)

•log type (1 char)

•temperature mode (1 char)

•offset (3 char)

•slope (4 char)

•unit (1 char)

• Lot record data:

•temperature (3 char)

•value (6 char)

•second value (6 char)

LODxPyyy Requests the yyyth pH record logged data when x=1.
LODxMyyy Requests the yyyth mV/Rel mV record logged data.
LODxIyyy Requests the yyyth ISE record logged data when x=1 (HI 3221)

or when x=2 (HI 3222).
LODxPALL Requests all pH Log on demand when x=1.
LODxMALL Requests all mV/Rel mV Log on demand.
LODxIALL Requests all ISE Log on demand when x=1 (HI 3221)

or when x=2 (HI 3222).

The answer string for each record contains:

• The logged mode (2 chars):

• xx=10 pH range/0.001 resolution on channel 1

• xx=11 pH range/0.01 resolution on channel 1

• xx=12 pH range/0.1 resolution on channel 1

• xx=13 mV range on channel 1

• xx=14 Relative mV range on channel 1

• xx=15 ISE range on channel 1 (HI 3221)

• xx=20 ISE range on channel 2 (HI 3222)

• xx=21 mV range on channel 2 (HI 3222)

• xx=22 Relative mV range on channel 2 (HI 3222)

• Reading status (1 char): R, O, U

• Calculated reading, with sign and decimal point and
exponent (13 chars) - for pH, Rel mV and ISE range

• Temperature reading, with sign and two decimal points
(8 chars)

• mV reading status (1 char): R, O, U

54

• The mV reading, with sign and decimal point (7 chars)

• The logged time, yymmddhhmmss (12 chars)

• The calibration slope, with sign and decimal point
(7 chars) - not available for Rel mV range

• The calibration offset, with sign and decimal point
(7 chars) - not available for ISE

• Temperature probe presence (1 char)

Notes: • “Err8” is sent if the instrument is not in measurement mode.

• “Err6” is sent if the requested range is not available.

• “Err4” is sent if the requested parameter is not available.

• “Err3” is sent if the Log on demand is empty.

• “Err9” is sent if the battery power is less than 30%.

• Invalid commands will be ignored.

55

TEMPERATURE CORRELATIONTEMPERATURE CORRELATION

TEMPERATURE CORRELATION

TEMPERATURE CORRELATIONTEMPERATURE CORRELATION

FOR FOR

pp

FOR

FOR FOR

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.

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

H SENSITIVE GLASSH SENSITIVE GLASS

p

H SENSITIVE GLASS

pp

H SENSITIVE GLASSH SENSITIVE GLASS

+

+

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

56

ELECTRODE CONDITIONINGELECTRODE CONDITIONING

ELECTRODE CONDITIONING

ELECTRODE CONDITIONINGELECTRODE CONDITIONING

& MAINTENANCE& MAINTENANCE

& MAINTENANCE

& MAINTENANCE& MAINTENANCE

Not present in gel electrodes.

PREPARATION PROCEDURE

Remove the electrode protective cap.
DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. This is normal
with electrodes and they will disappear when rinsed with water.
During transport tiny bubbles of air may have formed inside the glass bulb.
The electrode cannot function properly under these conditions. These bubbles
can be removed by "shaking down" the electrode as you would do with a glass
thermometer.
If the bulb and/or junction are dry, soak the electrode in HI 70300 Storage
Solution for at least one hour. Open the fill hole if refillable.

57

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.

®®

®

For AmpHelFor AmpHel

For AmpHel

For AmpHelFor AmpHel

®®

electrodes: electrodes:

electrodes:

electrodes: electrodes:

If the electrode does not respond to pH changes, the battery has run down
and the electrode should be replaced.

MEASUREMENT

Rinse the pH electrode tip with distilled or deionized water. Immerse the tip
3 cm (1¾”) 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.

See that the sleeve holes of the ORP probe are completly submersed.

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 61 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.

58

Follow the Storage Procedure above.

pH CLEANING PROCEDURE

•

General

•

Protein

•

Inorganic

•

Oil/grease

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
calibrating.

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.

59

TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE

TROUBLESHOOTING GUIDE

TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE

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60

ACCESSORIESACCESSORIES

ACCESSORIES

ACCESSORIESACCESSORIES

pH CALIBRATION SOLUTIONS

HI 50004-01 pH 4.01 Buffer Solution, 20 mL sachet, 10 pcs
HI 50004-02 pH 4.01 Buffer Solution, 20 mL sachet, 25 pcs
HI 50007-01 pH 7.01 Buffer Solution, 20 mL sachet, 10 pcs
HI 50007-02 pH 7.01 Buffer Solution, 20 mL sachet, 25 pcs
HI 50010-01 pH 10.01 Buffer Solution, 20 mL sachet, 10 pcs
HI 50010-02 pH 10.01 Buffer Solution, 20 mL sachet, 25 pcs
HI 5016 pH 1.68 Buffer Solution, 500 mL bottle
HI 5004 pH 4.01 Buffer Solution, 500 mL bottle
HI 5068 pH 6.86 Buffer Solution, 500 mL bottle
HI 5007 pH 7.01 Buffer Solution, 500 mL bottle
HI 5091 pH 9.18 Buffer Solution, 500 mL bottle
HI 5010 pH 10.01 Buffer Solution, 500 mL bottle
HI 5124 pH 12.45 Buffer Solution, 500 mL bottle
HI 8004L pH 4.01 Buffer Solution in FDA approved bottle, 500 mL
HI 8006L pH 6.86 Buffer Solution in FDA approved bottle, 500 mL
HI 8007L pH 7.01 Buffer Solution in FDA approved bottle, 500 mL
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

ELECTRODE STORAGE SOLUTION

HI 70300L Storage Solution, 500 mL bottle
HI 80300L Storage Solution in FDA approved bottle, 500 mL

ELECTRODE CLEANING SOLUTIONS

HI 70000P Electrode Rinse Solution, 20 mL sachet, 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 for single junction electrodes
HI 7072 1M KNO3 Electrolyte
HI 7082 3.5M KCl Electrolyte 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

61

120 mm

12 mm

0.5"

5 mm

0.2"

3 mm

0.12"

3.0 mm DIA

0.12"

HI 1083

120 mm

4.7"

12 mm

0.5"

HI 1053

120 mm

4.7"

12 mm

0.5"

9.5mm DIA

0.37"

HI 1043

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 7091L Reducing Pretreatment Solution, 500 mL bottle
HI 7092L Oxidizing Pretreatment Solution, 500 mL bottle

ORP 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

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.

"S" VERSION

HI 1053B

Glass-body, triple ceramic, conic shape, refillable, combination pH electrode.
Use: emulsions.

"S" VERSION

HI 1083B

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

62

75 mm

2.95"

6 mm

0.25"

HI 2031

120 mm

4.7"

12 mm

0.5"

HI 1230

210 mm

8.25"

8 mm

0.3"

7.5mm DIA

0.29"

HI 1331

120 mm

4.7"

5mm

0.2"

5mm DIA

0.2"

HI 1330

120 mm

4.7"

12 mm

0.5"

9.5mm DIA

0.37"

HI 1131

HI 1131B

Glass-body, single junction, refillable, combination pH electrode.
Use: general purpose.

"S" VERSION

HI 1330B

Glass-body, semimicro, single junction, refillable, combination pH electrode.
Use: laboratory, vials.

"S" VERSION

HI 1331B

Glass-body, semimicro, single junction, refillable, combination pH electrode.
Use: flasks.

"S" VERSION

HI 1230B

Plastic-body (PEI), double junction, gel-filled, combination pH electrode.
Use: general, field.

"

"

HI 2031B

Glass-body, semimicro, conic, refillable, combination pH electrode.
Use: semisolid products.

"

"

63

120 mm

4.7"

12 mm

0.5"

9.5mm DIA

0.37"

FC 220

120 mm

4.7"

12 mm

0.5"

FC 210

75 mm

2.95"

6 mm

0.25"

FC 200

120 mm

4.7"

12 mm

0.5"

FC 100

120 mm

4.7"

12 mm

0.5"

HI 1332

HI 1332B

Plastic-body (PEI), double junction, refillable, combination pH electrode.
Use: general purpose.

"S" VERSION

FC 100B

Plastic-body (PVDF), double junction, refillable, combination pH electrode.
Use: general purpose for food industry.

FC 200B

Plastic-body (PVDF), 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.

64

120 mm

4.7"

12 mm

0.5"

HI 4430

120 mm

4.7"

12 mm

0.5"

HI 3230

150 mm

5.9"

12 mm

0.5"

HI 3131

110 mm

4.3"

12 mm

0.5"

HI 1413

110 mm

4.3"

12 mm

0.5"

FC 911

FC 911B

Plastic-body (PVDF), double junction, refillable with built-in amplifier, combination pH
electrode. Use: very high humidity.

HI 1413B

Glass-body, single junction, flat tip, Viscolene, non-refillable, combination pH
electrode. Use: surface measurement.

ORP ELECTRODES

HI 3131B

Glass-body, refillable, combination platinum ORP electrode.
Use: titration.

"S" VERSION

HI 3230B

Plastic-body (PEI), gel-filled, combination platinum ORP electrode.
Use: general purpose.

"S" VERSION

HI 4430B

Plastic-body (PEI), gel-filled, combination gold ORP electrode.
Use: general purpose.

"S" VERSION

Consult the Hanna General Catalog for a complete and wide selection of electrodes.

65

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

OTHER ACCESSORIES

HI 740157 Plastic electrode refilling pipet (20 pcs)
HI 76404N Electrode holder
HI 7662-T Stainless steel Temperature probe with 1 m (3.3') screened

cable

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 76404N Electrode Holder

66

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.

Hanna Instruments reserves the right to modify the design, construction

and appearance of its products without advance notice.

67

SALES 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]

Singapore:

Tel. [phone] • Fax [phone]

South Africa:

Tel. [phone] • Fax [phone]

Taiwan:

Tel. [phone] • Fax [phone]

Thailand:

Tel. [phone] • Fax [phone]

05/08

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

68

MAN3222

.