Hanna Instruments HI 123 Instruction Manual

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Instruction Manual

pH/mV/ISE/Temperature

Bench Meters

with Calibration Check

HI 121 & HI 123

OFF

LOG

CHANNEL

CFM

CAL

Calibration Check

HI 123

pH / mV / ISE Meter

www.hannainst.com

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

tech@hannainst.com or turn to the back cover for our worldwide contact list. These instruments are in compliance with directives.

WARRANTY

HI 121 and HI 123 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 CONTENTS

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

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

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

FUNCTIONAL DESCRIPTION HI 121 .................................................................................. 4

FUNCTIONAL DESCRIPTION HI 123 .................................................................................. 5

HI 121 AND HI 123 SPECIFICATIONS ........................................................................... 10

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

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

ENHANCED CALIBRATION MESSAGES ............................................................................ 20

ELECTRODE CONDITION & ELECTRODE RESPONSE TIME ................................................. 21

RELATIVE mV CALIBRATION ........................................................................................... 22

ISE CALIBRATION .......................................................................................................... 23

GOOD LABORATORY PRACTICE (GLP) .............................................................................. 25

SETUP ......................................................................................................................... 30

LOGGING ...................................................................................................................... 34

AutoHOLD .................................................................................................................... 38

PRINTING (HI 123 only) ................................................................................................ 39

TEMPERATURE CALIBRATION (for technical personnel only) ........................................... 43

mV CALIBRATION (for technical personnel only) ............................................................ 44

PC INTERFACE .............................................................................................................. 45

pH BUFFER TEMPERATURE DEPENDENCE ..................................................................... 48

ELECTRODE CONDITIONING & MAINTENANCE ................................................................ 49

PRINTER MAINTENANCE (HI 123 only) .......................................................................... 52

TROUBLESHOOTING GUIDE ........................................................................................... 53

TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ................................................ 55

ACCESSORIES .............................................................................................................. 56

The Hanna HI 121 and HI 123 are professional bench meters with two input channels for pH, ORP (Oxidation Reduction Potential), ISE and Temperature measurements with Calibration Check.

Relative mV feature is also provided on both channels. Calibration Check performs a set of diagnostic tests during calibration using

the history of electrode slope and offset to detect problems that can cause loss of accuracy.

Calibration Check Features are:

• Enhanced Calibration Messages

• Electrode Condition on LCD Display

• Electrode Response Time on LCD Display

• Calibration Alarm Time Out

• Out of Calibration Range

Other features include:

• Up to five-point calibration with seven memorized buffers (1.68, 4.01,

6.86, 7.01, 9.18, 10.01 and 12.45 pH) and two custom buffers.

• pH calibration using pH buffers with 0.001 resolution.

• pH reading with manual or automatic temperature compensation.

• Two Log on demand (up to 50 samples) and Autologging (up to 1000 samples) corresponding to each input channel.

• Two selectable alarm limits.

• User selectable AutoLOG modes.

• Printing feature in four selectable languages (HI 123 only).

• Large easy-to-read LCD which shows the pH or ISE, mV and Temperature simultaneously, together with graphic symbols.

• AutoHOLD feature to freeze first stable reading on the LCD.

• GLP feature to view last calibration data for pH, ISE and Relative mV.

• PC interface.

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.

Each instrument is supplied with:

• HI 1131P Glass-body Combination pH Electrode

• HI 7662-T Temperature probe

• pH 4.01 & 7.01 Buffer solutions, 20 mL each

• HI 7071S Electrolyte solution

• 5 paper rolls (HI 123 only)

• 12VDC Power Adapter

• Instruction Manual

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 supplied accessories.

PRELIMINARY EXAMINATION

GENERAL DESCRIPTION

FUNCTIONAL DESCRIPTION

HI 121

1) Left Keyboard

2) ON switch

3) OFF switch

4) Right Keyboard

5) Reference input socket for ISE channel

6) BNC electrode connector for ISE channel

7) Pin input socket for pH channel

8) BNC electrode connector for pH channel

9) Temperature probe socket

10) Power adapter socket

11) RS232 serial communication connector

NUMResoIon

RelmVmVpH

AutoLOG

SETGLPAutoHOLD

ON OFF

Front Panel

Primary LCD

Secondary LCD

Electrode Condition

Electrode Response

Rear Panel

56789

RS232POWERTEMPpH/ORPPINISEREF

RCL

LOG

MODE

CHANNEL

CFMCAL

Calibration Check

pH / mV / ISE Meter

HI 121

FUNCTIONAL DESCRIPTION

HI 123

1) Left Keyboard

2) ON switch

3) OFF switch

4) Right Keyboard

5) Reference input socket for ISE channel

6) BNC electrode connector for ISE channel

7) Pin input socket for pH channel

8) BNC electrode connector for pH channel

9) Temperature probe socket

10) Power adapter socket

11) RS232 serial communication connector

12) Printer

ON OFF

NUMResoIon

RelmVmVpH

AutoLOG

PaperPrintAutoHOLD

Front Panel

Primary LCD

Secondary LCD

Electrode Condition

Electrode Response

Rear Panel

56789

Paper Roll

RS232POWERTEMPpH/ORPPINISEREF

LOG

CHANNELCFMCAL

Calibration Check

HI 123

pH / mV / ISE Meter

1 2

10 11 12

NUMResolutionISE

RelmVmVpH

AutoLOG

SETGLPAutoHOLD

HI 121 KEYBOARD ON THE LEFT

Shortcuts to alternate functions

1) AutoHOLD key, to freeze the first stable reading on the LCD.

2) GLP key, to display Good Laboratory Practice Information.

3) SET key, to enter/exit SETUP mode.

4) key, to toggle between parameters while in RECALL or SETUP

modifying mode (backwards), to toggle between absolute mV and temperature while in Relative mV mode and between pH buffer and temperature while in pH calibration mode.

5) AutoLOG key, to start/stop AutoLOG mode.

6) key, to toggle between parameters while in RECALL or SETUP

modifying mode (forwards), to toggle between absolute mV and temperature while in Relative mV mode and between pH buffer and temperature while in pH calibration mode.

7) pH key, to select pH channel.

8) mV key, to select mV range.

9) RelmV key, to select Relative mV range.

10) ISE key, to select ISE channel.

11) Resolution key, to select pH resolution.

Numerical keys

10) key, to change sign.

12) NUM key, to activate the numerical keys (0 to 9).

RCL

LOG

MODE

CHANNEL

CFMCAL

Calibration Check

pH / mV / ISE Meter

HI 121

HI 121 MAIN KEYBOARD ON THE RIGHT

1) CAL key, to enter and exit/escape calibration mode.

SET key (second function), to enter/exit SETUP mode.

2) CFM key, to confirm different values.

GLP key (second function), to display Good Laboratory Practice Information.

3) CHANNEL key, to select the measurement input channel, pH or ISE.

CLR key (second function), to clear calibration or logged data.

4) key, to manually increase temperature value or other parameters.

AutoHOLD key (second function), to freeze the first stable reading on the LCD.

5) key, to manually decrease temperature value or other parameters.

AutoLOG key (second function), to start/stop AutoLOG mode.

6) MODE key, to select the measurement unit or to switch focused data.

7) 2nd key, to select second key function.

8) LOG key, to store measured data.

9) RCL key, to enter/exit view logged data mode.

Note: To select second key function, press 2nd and then the desired key.

The “2nd” tag will appear on the LCD until the desired key is pressed. To leave second key function selection, press 2nd again.

1 2

10 11 12

NUMResolutionISE

RelmVmVpH

AutoLOG

PaperPrintAutoHOLD

HI 123 KEYBOARD ON THE LEFT

Shortcuts to alternate functions

1) AutoHOLD key, to freeze the first stable reading on the LCD.

2) Print key, to obtain a printout or to cancel printing.

3) Paper key, to pull out the paper.

4) key, to toggle between parameters while in RECALL or SETUP

modifying mode (backwards), to toggle between absolute mV and temperature while in Relative mV mode and between pH buffer and temperature while in pH calibration mode.

5) AutoLOG key, to start/stop AutoLOG mode.

6) key, to toggle between parameters while in RECALL or SETUP

modifying mode (forwards), to toggle between absolute mV and temperature while in Relative mV mode and between pH buffer and temperature while in pH calibration mode.

7) pH key, to select pH channel.

8) mV key, to select mV range.

9) RelmV key, to select Relative mV range.

10) ISE key, to select ISE channel.

11) Resolution key, to select pH resolution.

Numerical keys

10) key, to change sign.

12) NUM key, to activate the numerical keys (0 to 9).

LOG

CHANNEL

CFMCAL

Calibration Check

HI 123

pH / mV / ISE Meter

HI 123 MAIN KEYBOARD ON THE RIGHT

1) CAL key, to enter and exit/escape calibration mode.

SET key (second function), to enter/exit SETUP mode.

2) CFM key, to confirm different values.

GLP key (second function), to display Good Laboratory Practice Information.

3) CHANNEL key, to select the measurement input channel, pH or ISE.

CLR key (second function), to clear calibration or logged data.

4) key, to manually increase temperature value or other parameters.

AutoHOLD key (second function), to freeze the first stable reading on the LCD.

5) key, to manually decrease temperature value or other parameters.

AutoLOG key (second function), to start/stop AutoLOG mode.

6) MODE key, to select the measurement unit or to switch focused data.

Paper key (second function), to pull out the paper.

7) 2nd key, to select second key function.

8) LOG key, to store measured data.

9) RCL key, to enter/exit view logged data mode.

Print key (second function), to obtain a printout or to cancel printing.

Note: To select second key function, press 2nd and then the desired key.

The “2nd” tag will appear on the LCD until the desired key is pressed. To leave second key function selection, press 2nd again.

HI 121 AND HI 123

SPECIFICATIONS

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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, temperature calibrations and all other settings, even when unplugged.

• Make sure a fuse protects the main line.

ELECTRODE AND PROBE CONNECTIONS

For HANNA P type pH or ORP electrodes (with internal reference) connect the electrode’s BNC to the socket on the back of the instrument (#8 on page 4 and 5) and the pin to the appropiate socket (#7 on page 4 and 5).

Notes: • Electrode condition and response information is displayed on the

bar graph gauges during the day the calibration is performed only if HANNA P type (PIN) electrodes are used.

• If the electrode is not recognized as a HANNA P type electrode, the bar graph gauges will blink (25 seconds OFF, 4 seconds ON, full bar graph).

For Ion measurements, connect the electrode’s BNC to the appropiate socket (#6 on page 4 and 5) and the reference (for electrodes with separate reference) to the reference input socket (#5 on page 4 and 5).

For temperature measurements and automatic temperature compensation, connect the temperature probe to the appropriate socket.

INSTRUMENT START-UP

• Turn the instrument on by pressing the ON switch.

• All LCD tags are displayed and a beep is heard while the instrument performs a self test.

• The instrument displays then the date on the primary LCD and the time on the secondary LCD, along with the “Remove protective cap” and “Unscrew electrode refilling cap” messages alternatively blinking. These messages alert the user to follow displayed instructions in order to take proper measurements and to improve electrode response.

OPERATIONAL GUIDE

• The instrument automatically defaults to pH or mV measurement mode, if a HANNA P type pH or ORP electrode is detected.

• If no HANNA P type electrode is detected, the instrument starts in the same range as it was at power off.

pH MEASUREMENTS

Make sure the instrument has been calibrated before taking pH measurements.

• Press CHANNEL to enter pH channel.

Note: To change pH resolution, press MODE or simply

Resolution from the left keyboard.

• Submerge the electrode tip and the temperature probe approximately 4 cm (1½”) into the sample to be tested. Allow time for the electrode to stabilize.

• The pH is displayed on the primary LCD and the temperature on the secondary LCD.

OUT CAL RANGE feature warns the user if the current reading is out of the calibrated area. The calibrated area is that part of the pH range in which the calibration point assures an accurate reading. If the reading is taken out of the calibration area, the “OUT CAL RANGE” message will blink. The calibrated area is calculated in according with the pH resolution used during the reading. To avoid having this message, the calibration points have to be well distributed in the desired measurement range.

If measurements are taken successively in different samples, it is recommended to rinse the electrode thoroughly with deionized water or tap water and then with some of the next sample to prevent cross-contamination and to condition the electrode before immersing it into the sample solution.

The pH reading is affected by temperature. In order to measure the pH accurately, the temperature effect must be compensated for. To use the Automatic Temperature Compensation feature, connect and submerge the HI 7662-T temperature probe into the sample as close as possible to the electrode and wait for a few seconds.

If the temperature of the sample is known, manual temperature compensation can be performed by disconnecting the temperature probe.

The display will then show the default temperature of 25 ºC (77 ºF) or the last temperature reading with the “ºC” (or “ºF”) tag blinking.

CHANNEL

The temperature can be adjusted with the ARROW keys or the numerical keypad (from –20.0 ºC to 120.0 ºC or from –4.0 ºF to 248.0 ºF).

Press NUM to change the temperature value with the numerical keys. The “2nd” tag will blink. Press CLR or 2nd then CLR if you want to delete digits of the displayed value. The remaining digits will shift to right. Introduce the desired value. If the value is out of temperature range, a long beep will be heard. Press NUM to confirm the new value or CAL to escape without changing the temperature.

mV/ORP MEASUREMENTS

Oxidation-reduction potential (REDOX) measurements provide the quantification of the oxidizing or reducing power of the tested sample.

To correctly perform a redox measurement, the surface of the ORP electrode must be clean and smooth.

• Press MODE or simply mV from the left keyboard to enter mV range.

• Submerge the tip of the ORP electrode (4 cm/1½”) into the sample to be tested and allow a few seconds for the reading to stabilize.

• The instruments display the mV reading on the primary LCD and the temperature on the secondary LCD, along with “Channel” and “ORP” tags if a Hanna ORP electrode with pin is used.

Note: If an ORP electrode with pin is not detected, “Channel”, “pH” and

“ORP” tags will be displayed on the LCD.

• If the reading is out of range, the closest full-scale value will be displayed blinking on the primary LCD.

RELATIVE mV MEASUREMENTS

To enter Relative mV mode, press MODE or simply RelmV from the left keyboard. The relative mV reading will be displayed on the primary LCD and the current temperature value on the secondary LCD.

Note: Press or from the left keypad to toggle between temperature

and absolute mV reading on the secondary LCD.

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.

ION MEASUREMENTS

To measure Ion concentration, an independent input channel is provided.

• Press CHANNEL or simply ISE from the left keyboard to select ISE channel.

• Submerge the tip of the ISE electrode 4 cm (1½”) into the sample to be tested and allow a few seconds for the reading to stabilize.

• The instruments display the ppm reading on the primary LCD and the temperature on the secondary LCD.

Note: To view the mV or Rel mV reading on the ISE channel, press MODE

or simply mV/RelmV keys from the left keyboard.

TEMPERATURE MEASUREMENTS

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

Notes: • The temperature can be displayed in Celsius degrees (ºC) or in

Fahrenheit degrees (ºF) (see SETUP for details, page 30).

• Make sure that the temperature probe is in the same sample that is measured (pH or ISE).

Calibrate the instrument often, especially if high accuracy is required. The instrument should be recalibrated:

• Whenever the pH electrode is replaced.

• At least once a week.

• After testing aggressive chemicals.

• If “CAL DUE” tags are blinking during measurement.

• If “OUT CAL RANGE” message blinks during pH measurement (the measurement range is not covered by current calibration).

PREPARATION

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

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

If you are measuring in the acidic range, use pH 7.01 or 6.86 as first buffer and pH 4.01 or 1.68 as second buffer. If you are measuring in the alkaline range, use pH 7.01 or 6.86 as first buffer and pH 10.01/9.18 or 12.45 as second buffer.

For extended range measurements (acidic and alkaline), perform a five-point calibration by selecting five of the available buffers.

PROCEDURE

If 0.001 pH resolution is selected, each selected standard buffer value can be updated in according with the value on the production lot certificate at 25 ºC (77 ºF). Press 2nd then SET key when a standard pH buffer with

0.001 resolution is selected. The buffer value will start blinking and it can

be changed with the ARROW keys in a ±0.020 pH window. Calibration has a choice of 7 memorized buffers: pH 1.68, 4.01, 6.86,

7.01, 9.18, 10.01, 12.45 and 2 custom buffers.

The custom buffers are a special option that allows the user to calibrate in a buffer solution different from a standard one. Up to two custom buffers can be set in SETUP menu (see page 30). When selected during calibration, the “CUSTOM C1” or “CUSTOM C2” tags are displayed on the LCD and the custom buffer value can be changed in a ±1.0 pH window, around the set value.

For accurate measurements it is recommended to perform a five-point calibration. However, at least a two-point calibration is suggested.

The instruments will automatically skip the buffers used during calibration and the buffers which are in a ±0.2 pH window, around one of the calibrated buffers.

pH CALIBRATION

All new calibrations will override existing stored calibration data, in a ±0.2 pH window, at these calibration points. The slopes adjacent to the calibration points will be reevaluated.

If the new calibration point has no correspondence in the existing stored calibration data, it is added to it if this is not full, or the instrument will ask which buffer will be replaced by the current buffer.

If at least a two-point calibration has been performed and an offset correction of the electrode is desired, keeping unchanged the existing slopes, perform a one-point calibration with “OFFS” option selected in SETUP menu. If “Pnt” option is selected, the slopes adjacent to the calibration points will be reevaluated.

FIVE-POINT CALIBRATION

• Immerse the pH electrode and the temperature probe approximately 4 cm (1½”) into a buffer solution of your choice (pH 1.68, 4.01, 6.86, 7.01,

9.18, 10.01, 12.45, custom buffer 1 or 2, if these were set) and stir gently. The temperature probe should be close to the pH electrode.

• Press CAL. The “CLEAR CAL IF NEW ELECTRODE” message will be displayed blinking on the LCD for a few seconds if the instrument was calibrated before and calibration was not cleared.

Press CLR or 2nd then CLR if you are using a new electrode or want to clear calibration history, or wait a few seconds to continue.

Press CAL again or the ARROW keys to skip this message. Note: It is very important to clear calibration history when a new

electrode is used because most errors and warning messages that appear during calibration depend on calibration history.

• The instruments will display the measured pH on the primary LCD and the “7.01” buffer on the secondary LCD, together with “CAL” and “Cal Point 1” tags and “7.01” tag blinking.

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

CAL

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

• When the reading is stable and close to the selected buffer, “CFM” tag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the primary LCD and the secondary LCD will display the second expected buffer value, together with “CAL”, “Cal Point 2” and “7.01” tags and the corresponding buffer tag blinking.

• After the first calibration point is confirmed, immerse the pH electrode and the temperature probe approximately 4 cm (1½”) 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.

• When the reading is stable and close to the selected buffer, “CFM” tag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the primary LCD and the secondary LCD will display the third expected buffer value.

• After the second calibration point is confirmed, immerse the pH electrode and the temperature probe approximately 4 cm (1½”) into the 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, “CFM” tag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the primary LCD and the secondary LCD will display the fourth expected buffer value.

CFM

• After the third calibration point is confirmed, immerse the pH electrode and the temperature probe approximately 4 cm (1½”) into the fourth 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, “CFM” tag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the primary LCD and the secondary LCD will display the fifth expected buffer value.

• After the fourth calibration point is confirmed, immerse the pH electrode and the temperature probe approximately 4 cm (1½”) into the fifth 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, “CFM” tag blinks.

• Press CFM to confirm calibration.

• The instruments store the calibration values and return to normal measurement mode.

FOUR, THREE or TWO-POINT CALIBRATION

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

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

ONE-POINT CALIBRATION

Two SETUP selectable options are available: “Pnt” and “OFFS”. If the “Pnt” option is selected, the adjacent slopes will be reevaluated. If the “OFFS” option is selected, an electrode offset correction is performed

keeping unchanged the existing slopes.

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

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

Notes: • Press MODE or / from the left keyboard to toggle between

pH buffer and temperature reading during calibration.

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

If current confirmed buffer has no correspondence in the existing stored calibration and this is not full, the current buffer is added to the existing stored calibration.

CFM

If the existing stored calibration is full (five calibration points), the instrument asks which buffer will be replaced by current buffer.

Press the ARROW keys to select another buffer to be replaced. Press CFM to confirm the buffer that will be replaced. Press CAL to leave calibration without replacing.

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. Press 2nd then SET key if you want to adjust the buffer value. The buffer value, displayed on the secondary LCD, will start blinking.

Use the ARROW keys to change the buffer value. After about 5 seconds you performed the last change, the buffer value is

updated. Press 2nd then SET key if you want to change it again. Note: Custom buffer value can be adjusted in a ±1.00 pH window, around

the set value.

CLEAR CALIBRATION

Press CLR or 2nd then CLR in any moment during calibration. The “CLEAR CAL” tag will appear and “donE” message will be displayed on the secondary LCD.

All old calibrations, starting with current selected buffer are cleared and the instrument continues calibration.

If CLR or 2nd then CLR are pressed when “CLEAR CAL IF NEW ELECTRODE” message is displayed blinking, the calibration history is deleted and the instrument will display “hiSt” message on the primary LCD and “donE” message on the secondary LCD, along with “CLEAR CAL” tags. The calibration process will continue starting with 7.01 pH buffer as first buffer.

Note: If CLR or 2nd then CLR are pressed during the first calibration

point, the instrument returns to measurement mode.

The stored calibration history to used issue error and warning messages during calibration to help ensure the highest accuracy.

As electrode aging is normally a slow process, substantial changes from previous calibrations are likely due to a temporary problem with the electrode or buffers. Calibrating under these conditions will result measurement errors.

ERROR MESSAGES

Error messages appear if one or all of the calibration parameters are out of accepted windows. When these messages are displayed, calibration cannot be confirmed.

WRONG BUFFER

This message appears when the difference between the pH reading and the value of the selected buffer is too big. If this error message is displayed, check if you have selected the proper calibration buffer.

WRONG BUFFER TEMPERATURE

This message appears if the temperature of the buffer is outside the defined buffer temperature range.

WRONG & CONTAMINATED BUFFER / CHECK ELECTRODE

This message appears if the buffer used is contaminated or the electrode is supposed to be either broken or very dirty.

WRONG & CHECK ELECTRODE / CLEAN ELECTRODE

This message appears if the electrode is supposed to be broken or very dirty.

WRONG & OLD / CLEAR CAL & OLD

This message appears as a result of an erroneous slope condition. If the slope between current calibration point and one of the previous calibration, that was not overriden in current calibration, exceeds slope window (80% to 110%), this message will appear. Press CLR or 2nd then CLR to clear old parameters and continue calibration process or CAL to leave calibration.

WARNING MESSAGES

During calibration, the Calibration Check feature analyzes the electrode calibration history and warns the user when problems have been detected. It is possible to override the warning messages and confirm the calibration but it is not recommended.

CLEAR CAL IF NEW ELECTRODE

This warning is displayed any time you enter calibration and calibration is not cleared or the new calibration parameters are better than the previous ones. You can clear calibration history by pressing CLR or 2nd then CLR, or continue by pressing CAL.

ENHANCED CALIBRATION MESSAGES

ELECTRODE CONDITION &

ELECTRODE RESPONSE TIME

When using an appropriate HANNA BNC electrode with pin, the instrument will assess electrode condition and response time during each calibration and

will display the calibration status for the rest of the day.

The digital gauge for electrode condition is a representation of the offset and slope performance of the electrode. The response gauge is a function of the stabilization time between the first and second calibration buffers. These gauges reflect electrode performance and should be expected to slowly decrease over the life of the electrode. The condition and response gauges show the electrode’s condition at the time of calibration only and are displayed for the rest of the day the calibration is performed. For a continuous display of electrode condition at the time of calibration, daily calibration is necessary. The electrode condition and response time are also visible when viewing GLP data. If the instrument is not calibrated, it has been calibrated only in one point, or if calibration history was deleted, the electrode condition and response gauges will be empty.

CLEAN ELECTRODE

This warning message appears in order to alert the user that some dirt or deposits could be on the electrode. Refer to the electrode Cleaning Procedure. This ensures the removal of film, dirt or deposits on the glass bulb and reference junction.

CONTAMINATED BUFFER

This warning message appears in order to alert that the buffer could be contaminated. Refresh your buffer and continue the calibration procedure.

CHECK ELECTRODE / CHECK BUFFER

This warning message appears when the electrode slope exceeds the highest accepted slope limit (110%). Check your electrode and use fresh buffers.

CLEAN ELECTRODE / CHECK BUFFER

This warning appears in order to alert the user that the electrode can be dirty or the buffer contaminated. Refer to the electrode Cleaning Procedure and use fresh buffers.

The electrode response is evaluated only when calibration has been performed using pH 7.01 or pH 6.86, pH 4.01 and pH 10.01 or pH 9.18 buffers. When the instrument cannot evaluate the electrode response or pH

1.68/12.45 buffer was used as calibration buffer, the response gauge will be empty.

If the electrode is in a very poor condition, the first condition segment will blink. If the electrode response is very slow, the first response segment will blink.

• Press CAL when the instrument is in RELATIVE mV measurement mode.

The relative mV value is displayed on the primary LCD and the absolute mV value on the secondary LCD.

• Use the ARROW keys or the numerical keys if you want to change the

displayed relative mV value.

Notes: • Press MODE to select another resolution if the displayed value

allows it (e.g. if 199.9 is displayed, by pressing MODE the value will change to 1999; if 19.9 is displayed, nothing will happen if pressing MODE).

• Pressing CLR or 2nd then CLR, the displayed value is set to

0.0 mV.

• Press NUM from the left keyboard if you want to change the value using the numerical keys. The “2nd” tag will blink.

• Press CLR or 2nd then CLR to delete the last digit.

• Press MODE to select another resolution (see above).

• Press NUM again to leave the numerical keyboard.

• When the reading is stable, in mV range and the Relative mV offset is

inside the offset window (±2000 mV), “CFM” tag blinks.

• Press CFM 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” tag will blink. Change the input value or the Relative mV offset to complete the calibration process.

Note: Relative mV calibration can be performed on both channels, pH

and ISE.

RELATIVE mV CALIBRATION

For greatest accuracy, it is recommended to calibrate the instrument frequently. 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 tags on the display. This will make the calibration a simple and error-free procedure.

PREPARATION

In SETUP menu, select the proper ion charge. Note: If “undF” option is selected in SETUP menu, calibration must be

performed in two points, otherwise “----” message will be displayed on the LCD if exiting calibration after confirming the first used standard.

Pour small quantities of the standard 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 buffer solution. One for rinsing the electrode and one for calibration.

PROCEDURE

One or two-point calibration is available, using five memorized standard solutions: 0.1, 1, 10, 100, 1000 ppm.

Press CHANNEL or simply ISE from the left keyboard to select ISE channel. Remove the protective cap from the ISE electrode.

TWO-POINT CALIBRATION

• Immerse the ISE electrode approximately 4 cm (1½”) into the first standard and stir gently.

• Press CAL. The primary LCD will display the ppm value using the current offset and slope. The “CAL” and “Cal Point 1” tags will appear and the 0.1 ppm buffer will be displayed on the secondary LCD.

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

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

• When the reading is stable and close to the selected standard, the “CFM” tag blinks.

• Press CFM to confirm calibration.

CAL

ISE CALIBRATION

CFM

• The calibrated value will be displayed on the primary LCD and the second expected standard solution on the secondary LCD.

Note: The instrument will automatically skip the standard used for the first point.

• After the first calibration point is confirmed, immerse the ISE electrode approximately 4 cm (1½”) into the second standard solution.

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

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

• When the reading is stable and close to the selected standard, the “CFM” tag blinks.

• Press CFM to confirm calibration.

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

Note: • If the mV value is out of mV range (±2000), “WRONG”

“BUFFER” tags will blink. In this case check if the correct standard has been used, or refresh the electrode by following the maintenance procedure (see page 51). If necessary, change the standard or the electrode.

• Slope window is between ±20 mV and ±105 mV if ion charge is not specified (undF selected in SETUP menu) or between 50% and 120% of default slope for the corresponding ion charge.

Default slope value (mV/decade): –59.16 (monovalent anion) - ion charge is –1

59.16 (monovalent cation) - ion charge is 1

–29.58 (divalent anion) - ion charge is –2

29.58 (divalent cation) - ion charge is 2 100 - ion charge is “undF”

• Press CLR or 2nd then CLR key during calibration if you want to clear calibration parameters and set to default. The instrument will display “CLR” message and will return to measurement mode.

• Press MODE to display the temperature reading on the LCD during

calibration.

ONE-POINT CALIBRATION

• Press CAL after the first calibration point was confirmed.

The instrument memorizes the one-point calibration parameters and returns to measurement mode.

CAL

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

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

CALIBRATION ALARM TIME OUT

For pH calibration, all the instruments allow the user to set the number of days before the next required pH calibration. This value can be set from 1 to 7 days. The default setting is OFF (disabled).

The instrument checks if the time-out has expired. If the time elapsed, “CAL DUE” tags will blink as a reminder.

Note: If the instrument was not calibrated or all calibration parameters

were cleared, “CAL” “DUE” tags will be displayed even if the feature is disabled in SETUP menu.

LAST pH CALIBRATION DATA

The last pH calibration data is stored automatically after a successful calibration.

To view the pH calibration data, press 2nd then GLP key or simply GLP from the left keyboard (HI 121) when the instrument is in pH (mV) measurement mode.

The instrument will display the date (yyyy.mm.dd) of the last calibration.

Press the ARROW keys to view the next calibration parameter (pressing the key):

• The time (hh:mm) of the last calibration.

GOOD LABORATORY PRACTICE (GLP)

• The pH calibration offset.

• The pH calibration slope (the GLP slope is the average of the calibration slopes; the percentage is referred to the ideal value of 59.16 mV/pH).

• The calibration buffers in calibrating order, with the corresponding warnings.

The first pH calibration buffer:

The second pH calibration buffer:

The third pH calibration buffer:

The fourth pH calibration buffer:

The fifth pH calibration buffer:

Notes: • The “OLd” message displayed beside the pH value means that

this buffer was not used during last calibration. Press 2nd then SET key if you want to see calibration date (or time, if old calibration was performed in the same day with current calibration).

• Each calibration buffer is displayed with the resolution from calibration moment.

• If “no bUF” message appears on the LCD, the instrument informs you that calibration was performed in less than five points.

• The Calibration Alarm Time Out status. If disabled,

or the number of days until the calibration alarm will be displayed (e.g. 5 days), or from the time calibration expired (e.g. –3 days).

• The instrument ID.

LAST ISE CALIBRATION DATA

Last ISE calibration data is stored automatically after a successful calibration. To view the ISE calibration data, press 2nd then GLP key while in ISE

measurement mode. The instrument will display the date (yyyy.mm.dd) of the last calibration

as in pH GLP mode. Press the ARROW keys to view the next logged calibration parameter (pressing the key):

• The ISE calibration time as in pH GLP mode.

• The ISE calibration slope (mV/decade) on the primary LCD and the ion charge on the secondary LCD.

• The first ISE calibration buffer on the primary LCD and the corresponding mV value on the secondary LCD.

• The second ISE calibration buffer on the primary LCD and the corresponding mV value on the secondary LCD.

Notes: • If a one-point calibration is performed after a two-point

calibration, the instrument will keep the old slope.

• If “no bUF” message appears on the LCD, the instrument informs you that calibration was performed in only one point.

• The instrument ID as in pH GLP mode.

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 2nd then GLP key or simply GLP from the left keyboard (HI 121) while in Relative mV measurement mode.

The instrument will display the Relative mV GLP information.

• The date (yyyy.mm.dd) of the last calibration as in pH GLP mode. Press the ARROW keys to view the next logged calibration parameter (pressing the key):

• The Relative mV calibration offset and time (hh:mm) as in pH GLP mode.

• The instrument ID as in pH GLP mode. Notes: • Press 2nd then GLP key at any moment and the instrument

will return to measurement mode.

• If calibration has not been performed, the instrument displays “no CAL” message blinking.

Setup mode allows viewing and modifying the following parameters:

• Calibration Alarm Time Out (pH channel only)

• One-point calibration behaviour (pH channel only)

• Custom buffer 1 (pH channel only)

• Custom buffer 2 (pH channel only)

• Ion charge (ISE channel only)

• Alarm High Limit (both channels)

• Alarm Low Limit (both channels)

• AutoLOG Start Condition (both channels)

• AutoLOG End Condition (both channels)

• AutoLOG Interval (both channels)

• Temperature Unit

• Current Date (yyyy.mm.dd)

• Current Time (hh:mm)

• Printing Language (HI 123 only)

• Printer Status (HI 123 only)

• Beep Status

• Baud Rate (serial communication)

• Command prefix (serial communication)

• Instrument ID To enter SETUP mode, press 2nd then SET key, or simply SET from the left

keyboard (HI 121 only), while the instrument is in measurement mode. To set channel specific parameters, enter SETUP from the appropriate channel. Select the desired setup parameter using the ARROW keys. Press CAL if you want to change the item value. The selected item (e.g.

hour, in setting up the correct time) and “CFM” tag will start blinking.

Press the ARROW keys to change the displayed value or simply use the numerical keys for all numerical parameters.

Note: To use the numerical keys, press NUM from the left keyboard. The “2nd”

tag will blink. Set the desired number digit by digit. The new introduced digit is always the last one. All the previous digits will shift to left.

To delete digits press CLR or 2nd then CLR. Last introduced digit will be deleted and the number will shift to right.

SETUP

If there is another item to be set (e.g. minutes), press MODE or / from the left keyboard. The other item will start blinking.

Press the ARROW keys to change the displayed value or simply use the numerical keys for all numerical parameters.

Press CFM to confirm or CAL to escape. Press the ARROW keys to select the next/previous parameter. Press 2nd then SET key, or simply SET from the left keyboard (HI 121 only)

to exit SETUP menu at any time. The instrument asks for printing a Setup Report (HI 123 only). Press CFM to print the Setup Report or CAL to return to measurement mode.

The following table lists the SETUP parameters, their valid values range and the factory settings (default):

PrEF Command Prefix 0 to 47 16 In Id Instrument ID 0000 to 9999 0000

bEEP Beep Status ON/OFF OFF bAUd Baud Rate 600; 1200; 2400; 4800; 9600 2400

LAnG Printing Language EnG, ItA, ESP, FrA English USA

Printer Status ON/OFF OFF

Custom C2 Custom Buffer 2 -2.00 to 16.00 pH no

Custom C1 Custom Buffer 1 -2.00 to 16.00 pH no

Date Date (yyyy.mm.dd) 2000.01.01 to 2099.12.31 2004.01.01

CAL DUE Alarm Time Out OFF or 1 to 7 days OFF

Time Time (hh:mm) 00:00 to 23:59 00:00

Strt AutoLOG Start Condition See Time/Date or “btn” “btn” End AutoLOG End Condition “dur”, “SAMP”, “rdG” “dur” Interval AutoLOG Interval 5 s to 180 min 5 s

AL.HI Alarm High Limit pH/mV/RelmV ranges no AL.LO Alarm Low Limit pH/mV/RelmV ranges no

Item Description Valid values Default

1Pnt One-point cal. behaviour Pnt or OFFS Pnt

IonCG Ion Charge undF or -2; -1; 1; 2 undF

tEMP Temperature Unit ºC or ºF ºC

Notes: • The custom buffers can be set only with 0.001 pH resolution.

If 0.01 pH resolution is selected during calibration, the displayed custom buffer value will be a rounded one.

• For calibration alarm time out, custom buffers, alarm limits, start and stop condition items, if pressing CLR or 2nd then CLR while in changing mode, the selected item will be set to default.

• To select the right ion charge, different ion types and their charge are presented in the table below:

• Printer status and printing language items appear only for

HI 123. The available printing languages are: EnG (English), ItA (Italiano), ESP (Español) and FrA (Français).

ALARMS SETUP

• Select one of the alarm items. The displayed alarm value will be the previous set one.

• Press MODE to select the range for alarm. The corresponding range tag will blink.

• Press CAL to enter in changing mode. Set the new value using the

ARROW or the numerical keys.

Notes: • Press MODE while in changing mode to select another resolution

if the displayed value allows it (e.g. if 199.9 is displayed, by pressing MODE the value will change to 1999; if 19.9 is displayed, nothing will happen if pressing MODE).

• Pressing CLR or 2nd then CLR, the displayed value will be set

to default (“no”). The first displayed value after “no”, if one of the ARROW keys is pressed, will be 7.00 pH or 0.0 mV, in according with the selected range.

• Press NUM from the left keyboard if you want to change the

value using the numerical keys. The “2nd” tag will blink.

• Press CLR or 2nd then CLR to delete the last digit.

• Press MODE to select another resolution (see above).

• Press NUM or CFM to confirm the introduced value from the

numerical keyboard.

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When in normal measurement mode:

• If only “AL.LO” item is set, the instrument will beep when the reading is below alarm low value.

• If only “AL.HI” item is set, the instrument will beep when the reading is above alarm high value.

• If both alarms are set, the instrument will beep when the reading is above alarm high value or below alarm low value.

Note: If “AL.HI” item is less than or equal to “AL.LO” item, “WRONG” tag

will blink.

AutoLOG SETUP

AutoLOG Start Condition

• Select the “Strt” item. The displayed AutoLOG start condition will be the previous set one. The default value is “btn” – button (start with key).

• Press and keep hold down MODE while in view mode, when time is displayed, to view the set date.

• If pressing CAL while in view mode, the start time will be displayed.

Notes: • Pressing CLR or 2nd then CLR while in changing mode, the

start condition will be set to default (“btn”).

• The first displayed value after “btn” will be the current time/date.

AutoLOG End Condition

• Select the “End” item. The displayed AutoLOG end condition will be the previous set one. One of the following options will be available: “dur” (duration), “SAMP” (samples number), “rdG” (reading limits).

• Pressing MODE while in view mode, the instrument will display one of the options: “dur”, “SAMP”, “rdG” & “pH”, “rdG” & “mV”, “rdG” & “Rel mV”.

• Pressing CAL, the instrument will enter in changing mode in according with the selected option and will display one of the following messages:

• “dur” on the secondary LCD and duration (hh:mm) on the primary

LCD, along with “TIME” tag. The default value is 3 hours. The duration can be set from 1 minute to 199 hours and 59 minutes.

Note: Pressing CLR or 2nd then CLR while in changing mode, the

end condition value will be set to default (3 hours).

• “SAMP” on the secondary LCD and sample number on the primary

LCD. The default value is 1000 samples. Note: Pressing CLR or 2nd then CLR while in changing mode, the

end condition value will be set to default (1000 samples).

• “rdG” on the secondary LCD and last set limit value on the primary

LCD, with the corresponding range tag blinking. The default value is 7.00 pH or 0.0 mV, in according with the selected range.

Notes: • Pressing MODE while in view mode, another resolution

is selected.

• Pressing CLR or 2nd then CLR while in changing mode, the

end condition will be set to default (7.00 pH or 0.0 mV).

This feature allows the user to log pH and Rel mV or ISE and Rel mV measurements, together with temperature automatically. All logged data can be transferred to a PC through the RS232 port.

The maximum logging space is 1000 record locations (samples) on each channel. This can be divided in 1 up to 50 lots (one lot can use all the free space). The lot ID (number) is between 1 and 99 (after 99 it restarts from 1). Only up to 50 lots can be memorized at one time, even if there is free space available.

Note: When the logged lots are more than one, the total number of

samples can be less than 1000, even with full memory, due to the fact that logging memory is divided in pages of 20 samples each.

The appropriate logging interval can be set from 5 seconds to 180 minutes (see SETUP for details, page 30).

Up to 100 record locations are also provided (50 on each channel).

LOGGING THE CURRENT DATA (LOG ON DEMAND)

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

The instrument will display the current date (mm.dd) on the primary LCD, the record number on the secondary LCD, the “LOG” tag blinking for a few seconds and then the free locations number.

If there are less than 6 memory locations remaining, the record number and “Lo” message will blink for a few seconds to alert the user and then the free locations number is displayed on the LCD.

LOGGING

LOG

The AutoLOG will be started in according with “Strt” item, from button (“btn”) by pressing AutoLOG or when the starting time condition is reached.

The AutoLOG will stop in according with the selected option for “AutoLOG End Condition” item or when AutoLOG is pressed.

If the LOG space is full, “FULL LOC” message will be displayed on the LCD for a few seconds with “LOG” tag blinking, and then ”FrEE 0” message.

The instrument returns to normal measurement mode.

AutoLOGGING

The setable AutoLOG modes make these instruments very useful in a wide range of applications:

• Start at button or set time/date; stop after a set duration.

• Start at button or set time/date; stop when a set value is reached.

• Start at button or set time/date; stop when a set sample number is reached.

To start autologging using the keyboard, press 2nd then AutoLOG key or simply AutoLOG from the left keyboard while the instrument is in measurement mode.

The instrument will display for a few seconds the lot number on the primary LCD and the AutoLOG interval on the secondary LCD, together with “AutoLOG” tag.

Notes: • For the other AutoLOG modes, the autologging starts/stops

automatically after the set start/stop condition in SETUP menu is reached and the stop condition is correct.

• The “AutoLOG” tag will blink if one of these modes is selected and the start condition is not reached.

After data logging is started, the current value is displayed on the primary LCD and the temperature on the secondary LCD, along with “AutoLOG” tag.

TEMPERATURE CALIBRATION

(for technical personnel only)

To stop autologging, press 2nd then AutoLOG key again, or simply AutoLOG from the left keyboard.

The instrument will display for a few seconds the lot number on the primary LCD and the sample number on the secondary LCD, together with “AutoLOG” tag, and will return to measurement mode.

Notes: • If printer is ON, each logged sample is printed only if the

AutoLOG interval is at least 30 s (HI 123 only).

• If the AutoLOG pages are full, the “FULL LOC” message will be displayed on the LCD, as in Log on demand mode.

VIEW LOGGED DATA

Press RCL to retrieve the information stored while in measurement mode. If no data were logged, the instrument displays:

Otherwise, the instrument will display the memorized data, in according with the selected channel:

• If RCL mode was invoked while the instrument was in pH channel: the

last pH or Rel mV memorized reading on the primary LCD and the lot number on the secondary LCD.

• If RCL mode was invoked while the instrument was in ISE channel: the

last ppm or Rel mV memorized reading on the primary LCD and the lot number on the secondary LCD.

Note: If LOG mode was invoked while the instrument was in mV/Relative

mV measurement range, the corresponding memorized reading will be displayed on the primary LCD, along with “RelmV” tag.

Press 2nd then SET key while in RECALL mode and the instrument will toggle between the lot or record number on the secondary LCD. Use the ARROW keys to select another lot or record.

Press MODE or from the left keyboard and the instrument will display the next logged parameter as shown in the table below:

Notes: • If pressing from the left keyboard, the previous logged

parameter will be displayed.

• If in Rel mV RECALL mode regarding the slope, the instrument will display “----” message on the primary LCD.

• The record number refers to an identification number inside a lot.

Last displayed parameter is “dEL” message on the primary LCD and the lot number on the secondary LCD.

OFFSET Offset value Lot (or record) number

TIME Hour & minutes Seconds DATE Year Month & day

Parameter Primary LCD Secondary LCD

SLOPE Slope value Lot number (Ion charge for ISE range)

mV mV reading Temperature

AutoHOLD

To freeze the first stable reading on the LCD press 2nd then AutoHOLD key, or simply AutoHOLD from the left keyboard while the instrument is in measurement mode. The “Auto” ”HOLD” tags will be displayed blinking on the LCD until the reading will stabilize.

When the reading is stable, the “Auto” “HOLD” tags stop blinking and the reading is frozen.

Press 2nd then AutoHOLD key again, or simply AutoHOLD from the left keyboard to return to normal measurement mode.

Note: Pressing MODE or the specific range keys from the left keyboard, the

instrument will skip to the displayed range, without leaving AutoHOLD mode. The LOG key also holds AutoHOLD mode.

Pressing 2nd then SET, GLP or RCL key, the instrument leaves AutoHOLD mode and performs the selected function.

Notes: • The “LdM” message on the secondary LCD shows that data

has been stored in Log on demand mode.

• Pressing 2nd then SET key, the instrument toggles between lot number, record number (Log on demand only) or all lots.

• Press CLR or 2nd then CLR to delete the selected lot/record or all lots. Note: Positions remain free in the Log on demand lot by deleting the last

logged samples or all the lot.

• If “dEL ALL” option was selected, all logged data is deleted and the instrument returns to measurement mode.

Press RCL at any time to return to measurement mode.

A complete set of information based on the measured, set or recorded data can be printed.

Data can be printed on demand (for current reading in measurement mode, GLP and SETUP modes) by pressing 2nd then Print key, or simply Print from the left keyboard, or automatic (for AutoLOG and Log on demand modes).

Automatic data printing is possible in AutoLOG mode only if the printer is ON and the AutoLOG interval is greater than 30 seconds.

Note: To cancel printing, press 2nd then Print key again or simply Print

from the left keyboard.

When in pH measurement mode, the printout provides the following information:

Note: For ISE and Relative mV measurement modes, the ppm and Rel. mV

value respectively will be printed.

When in GLP mode, the printout provides the following information:

• For pH range:

• For Rel mV range:

Date 2004/10/15 Time 14:24:55 pH 7.00 mV 0.0 °C 25.0

PRINTING (HI 123 only)

GLP pH Instr ID 0002 Date 2004/10/15 Time 15:30:05 Cal Time Out OFF Offset 0.6mV Slope 99.7% Cal Buffers pH 7.01 pH 4.01 pH 10.01

GLP Rel mV Instr ID 0002 Date 2004/10/15 Time 14:20:05 Channel pH Off.RelmV 0.3

• For ISE range:

When in SETUP mode, the following information can be printed:

• If 2nd then Print key are the first

keys pressed after entering SETUP mode, a SETUP table of contents will be printed:

• When exiting SETUP mode, the instrument asks if a SETUP REPORT shall be print. The “Prn” message will be displayed on the LCD, together with “ ” tag and “CFM” tag blinking.

INSTRUMENT SETUP Ion Charge Beep Alarms:

Alarm high Alarm low

AutoLOG:

Start condition End condition

Interval Current Date Current Time Printing

Language Printer ON/OFF Beep ON/OFF Baud rate Command prefix Instrument ID Active Keys:

-next item

-prev. item

CAL-enter in

modifying mode SET-exit SETUP MODE-select

parameter See also items Help printings

GLP Ion

Instr ID 0002 Date 2004/10/15 Time 14:25:05 Slope -59.3 Ion Charge 1 Cal Buffers ppm 0.1 mV -312.8 ppm 100 mV -134.8

• Press CFM to print the SETUP REPORT or CAL to escape without printing.

When in SETUP mode, if pressing CAL, then Print for a chosen parameter, a help printout will come out, providing the following information (e.g. AutoLOG Interval):

When in LOG mode, a printout will automatically come out, providing the following information:

• For pH/mV/ISE Log on demand:

SET AUTOLOG

INTERVAL

(5s to 180min)

Active Keys:

-increment

-decrement CAL-exit,no save MODE-select

parameter

CFM-save & exit

SETUP REPORT Instr ID 0002 Ion Charge 1 Date 2004/10/15 Time 16:25:31 Printer ON Language ENG Beep OFF ALARM HIGH LIMIT pH no mV no Rel mV no ALARM LOW LIMIT pH no mV no Rel mV no AUTOLOG: Interval 00:30 START Condition: Date 2004/10/15 Time 16:20:00 END Condition: Sample No 20

LOG ON DEMAND Instr ID 0002 Date 2004/10/15 Time 17:38:25 Sample No 5 pH 7.01 mV 0.0 °C 25.0 Offset 0.9mV Slope 99.7%

• For AutoLOG mode:

Note: If selecting a different printing language, all data will be printed in

the selected language.

START AUTOLOG Instr ID 0002 Lot L03 Date 2004/10/15 Time 18:05:01 Interval 00:30 Slope 99.7%

Sample No 1 pH 7.02 mV -0.5 °C 25.0

Sample No 2 pH 7.01 mV -0.2 °C 25.0

Sample No 3 pH 6.97 mV 1.9 °C 24.9

STOP AUTOLOG Date 2004/10/15 Time 18:06:51

Offset 0.1mV

TEMPERATURE CALIBRATION

(for technical personnel only)

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

calibration is needed when they are replaced. If the temperature measurements are inaccurate, temperature recalibration

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

Customer Service Center, or follow the instructions below.

• Prepare a vessel containing ice and water and another one containing hot water (at approximately 50 ºC or 122 ºF). Place insulation material around the vessels to minimize temperature changes.

• Use a calibrated thermometer with a resolution of 0.1 ºC or 0.1 ºF as a reference thermometer. Connect the HI 7662-T temperature probe to the appropriate socket.

• With the instrument off, press and hold down the CAL & keys, then power on the instrument. The “CAL” tag will appear and the secondary LCD will show 0.0 ºC or 32.0 ºF. The primary LCD will display the measured temperature or the ”----” message, if the measured temperature is out of range.

• Immerse the temperature probe 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 reading on the secondary LCD to that of ice and water, measured by the reference thermometer. When the reading is stable and close to the selected calibration point, “CFM” tag will blink.

• Press CFM to confirm. The secondary LCD will display

50.0 ºC or 122.0 ºF.

• 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 reading on the secondary LCD to that of the hot water.

• When the reading is stable and close to the selected calibration point, “CFM” tag will blink.

CFM

mV CALIBRATION

(for technical personnel only)

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

Note: If the reading is not close to the selected calibration

point, “WRONG” tag will blink. Change the temperature probe and restart calibration.

All the instruments are factory calibrated for mV. Hanna’s ORP electrodes are interchangeable and no mV calibration is

needed when they are replaced. If the measurements are inaccurate, mV recalibration should be performed. For an accurate recalibration, contact your dealer or the nearest Hanna

Customer Service Center, or follow the instructions below. A two or three-point calibration can be performed at 0.0 mV, 600.0 mV

and 1800.0 mV.

• Attach to the BNC connector (#8 on page 4 and 5 for pH channel or #6 on page 4 and 5 for ISE channel) a mV simulator with an accuracy of ±0.1 mV.

• With the instrument off, press and hold down CFM & LOG keys for pH input channel calibration or CHANNEL & RCL keys for ISE input channel calibration, then power on the instrument. The “CAL” tag will appear and the secondary LCD will show 0.0 mV.

• Set 0.0 mV on the simulator. When the reading is stable and close to the selected calibration point, “CFM” tag will blink.

• Press CFM to confirm. The secondary LCD will display 600 mV.

• Set 600.0 mV on the simulator. When the reading is stable and close to the selected calibration point, “CFM” tag will blink.

• Press CFM to confirm. The secondary LCD will display 1800 mV.

• Set 1800.0 mV on the simulator. When the reading is stable and close to the selected calibration point, “CFM” tag will blink.

• Press CFM to confirm. The instrument returns 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 can not calibrate.

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

instrument will return to measurement mode. If calibration process is stopped after 600 mV is confirmed, the 600 mV range is calibrated and calibration parameters are memorized.

CFM

PC INTERFACE

Data transmission from the instrument to the PC can be done with the HI 92000 Windows® compatible software (optional). HI 92000 also offers graphing and on-line help feature.

Data can be exported to the most popular spreadsheet programs for further analysis.

To connect your instrument to a PC, use the optional Hanna HI 920010 cable connector. Make sure that your instrument is switched off and plug one connector to the instrument RS232C socket and the other to the serial port of your PC.

Notes: • Other cables than HI 920010 may use a different configuration.

In this case, communication between instrument and PC may not be possible.

• 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 HI 920010 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 the scheme is:

where: <command prefix> is a selectable ASCII character

between 0 and 47 (default 16). <command> is the command code.

Note: Either small or capital letters can be used.

SIMPLE COMMANDS

CHN Is equivalent to pressing CHANNEL MOD Is equivalent to pressing MODE CAL Is equivalent to pressing CAL CFM Is equivalent to pressing CFM UPC Is equivalent to pressing the UP arrow key DWC Is equivalent to pressing the DOWN arrow key LOG Is equivalent to pressing LOG RCL Is equivalent to pressing RCL ALG Is equivalent to pressing AutoLOG

SET Is equivalent to pressing SET PRT Is equivalent to pressing PRINT (HI 123 only) CLR Is equivalent to pressing CLR OFF Is equivalent to pressing OFF AHD Is equivalent to pressing AutoHOLD CHR xx Change the instrument range according with the parameter

value (xx):

• xx=00 pH range/0.001 resolution, pH channel

• xx=01 pH range/0.01 resolution, pH channel

• xx=03 mV range, pH channel

• xx=04 Relative mV range, pH channel

• xx=13 mV range, ISE channel

• xx=14 Relative mV range, ISE channel

• xx=15 ISE range, ISE channel

The meter will answer for these commands with:

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

RAS Causes the instrument to send a complete set of readings

in according with the current range:

• pH, mV and temperature reading on pH range.

• mV and temperature reading on mV range.

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

Note: The temperature is sent with two decimals and in Celsius degrees,

even if the set temperature unit was Fahrenheit degrees.

DA? Requests the date. TI? Requests the time. MDR Requests the instrument model name and firmware code. GLP Requests the calibration data record. PAR Requests the setup parameters setting. NSL Requests the number of logged samples. ?ML Requests the information about AutoLOG.

/MLPxxx Selects lot on pH channel. /MLIxxx Selects lot on ISE channel. ?DM Downloads the selected AutoLOG. LODPxxx Requests the xxxth pH record logged data. LODIxxx Requests the xxxth ISE record logged data. LODPALL Requests all pH Log on demand. LODIALL Requests all ISE Log on demand.

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

• “Err7” is sent if a different range is requested during AutoLOGGING

mode (for CHR xx command only).

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

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

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

• Invalid commands will be ignored.

pH BUFFER TEMPERATURE

DEPENDENCE

Temperature has an effect on pH. The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions.

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

During calibration the instrument will display the pH buffer value at 25 ºC (77 ºF).

PMET SREFFUBHp

Cº Fº 976.1 010.4 268.6 010.7 771.9 010.01 454.21

0 23 076.1 700.4 289.6 031.7 954.9 613.01 973.31

5 14 076.1 200.4 949.6 890.7 193.9 542.01 871.31

01 05 176.1 000.4 129.6 070.7 823.9 081.01 589.21

51 95 376.1 100.4 798.6 640.7 372.9 811.01 997.21

02 86 576.1 400.4 878.6 720.7 222.9 260.01 126.21

52 77 976.1 010.4 268.6 010.7 771.9 010.01 054.21

03 68 386.1 710.4 158.6 899.6 731.9 269.9 682.21

53 59 886.1 620.4 248.6 989.6 801.9 919.9 821.21

04 401 396.1 730.4 738.6 389.6 960.9 188.9 879.11

54 311 007.1 940.4 438.6 979.6 040.9 748.9 438.11

05 221 707.1 260.4 438.6 879.6 410.9 718.9 796.11

55 131 517.1 670.4 638.6 979.6 099.8 397.9 665.11

06 041 427.1 190.4 938.6 289.6 969.8 377.9 244.11

56 941 437.1 701.4 448.6 789.6 849.8 757.9 323.11

07 851 447.1 321.4 058.6 399.6 929.8 647.9 112.11

57 761 557.1 931.4 758.6 100.7 019.8 047.9 401.11

08 671 767.1 651.4 568.6 010.7 198.8 837.9 300.11

58 581 087.1 271.4 378.6 910.7 178.8 047.9 809.01

09 491 397.1 781.4 088.6 920.7 158.8 847.9 918.01

59 302 708.1 202.4 888.6 040.7 928.8 957.9 437.01

ELECTRODE CONDITIONING

& 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 Storage Solution for at least one hour.

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 AmpHel® electrodes:

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

MEASUREMENT

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.

See that the sleeve holes of the ORP probe are completly submerged. Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve.

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 49 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:

Refill the reference chamber with fresh electrolyte (HI 7071 or HI 8071 for single junction or HI 7082 or HI 8082 for double junction electrodes). Allow the electrode to stand upright for 1 hour.

Follow the Storage Procedure above.

pH CLEANING PROCEDURE

• General Soak in Hanna HI 7061 or HI 8061 General

Cleaning Solution for approximately ½ hour.

• Protein Soak in Hanna HI 7073 or HI 8073 Protein

Cleaning Solution for 15 minutes.

• Inorganic Soak in Hanna HI 7074 Inorganic Cleaning

Solution for 15 minutes.

• Oil/grease Rinse with Hanna HI 7077 or HI 8077 Oil and

Fat Cleaning Solution.

IMPORTANT: After performing any of the cleaning procedures, rinse the electrode thoroughly with distilled water, refill the reference chamber with fresh electrolyte (not necessary for gel-filled electrodes) and soak the electrode in HI 70300 or HI 80300 Storage Solution for at least 1 hour before taking measurements.

PRINTER MAINTENANCE

(HI 123 only)

HI 123 instrument uses plain paper rolls 44 mm width. To insert a new paper roll, follow the procedure below:

• For an easier insertion, cut the paper edge as shown in the next figure:

• Put the paper roll on the paper holder attached to the printer.

• Insert the paper edge into the printer slot as shown below:

• Simply press Paper from the left keyboard to feed

the printer. Allow about 5 cm (2”) to exit from the printer.

• Tear the paper out for its edge to be straight, as shown below:

The paper is now properly inserted and the printer is ready to print.

INSERT

TEAR

CUT

TROUBLESHOOTING GUIDE

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TROUBLESHOOTING GUIDE (cont.)

Typical Electrode Life

Ambient Temperature 1 – 3 years 90 ºC (194 ºF) Less than 4 months 120 ºC (248 ºF) Less than 1 month

Alkaline Error

High concentrations of sodium ions interfere with readings in alkaline solutions. The pH at which the interference starts to be significant depends upon the composition of the glass. This interference is called alkaline error and causes the pH to be underestimated. Hanna’s glass formulations have the indicated characteristics.

1.0 Mol L-1 Na

0.1 Mol L-1 Na

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

13.00

13.50

14.00

12.50

13.00

13.50

14.00

0.10

0.14

0.20

0.10

0.18

0.29

0.40

The resistance of glass electrodes partially depends on the temperature. The lower the temperature, the higher the resistance. It takes more time for the reading to stabilize if the resistance is higher. In addition, the response time will suffer to a greater degree at temperatures below 25 ºC (77 ºF).

Since the resistance of the pH electrode is in the range of 50 – 200 Mohm, the current across the membrane is in the pico Ampere range. Large currents can disturb the calibration of the electrode for many hours.

For these reasons high humidity environments, short circuits and static discharges are detrimental to a stable pH reading.

The pH electrode’s life also depends on the temperature. If constantly used at high temperatures, the electrode life is drastically reduced.

TEMPERATURE CORRELATION

FOR pH SENSITIVE GLASS

pH BUFFER SOLUTIONS

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 6016 pH 1.679 Buffer Solution, 500 mL bottle HI 6004 pH 4.010 Buffer Solution, 500 mL bottle HI 6068 pH 6.862 Buffer Solution, 500 mL bottle HI 6007 pH 7.010 Buffer Solution, 500 mL bottle HI 6091 pH 9.177 Buffer Solution, 500 mL bottle HI 6010 pH 10.010 Buffer Solution, 500 mL bottle HI 6124 pH 12.450 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 SOLUTIONS

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

ELECTRODE 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

ACCESSORIES

ORP PRETREATMENT SOLUTIONS

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

pH ELECTRODES

All electrodes with code ending with P are supplied with BNC & pin connectors and 1 m (3.3') cable, as shown below:

HI 1043P

Glass-body, double junction, refillable, combination pH electrode. Use: strong acid/alkali.

HI 1053P

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

HI 1131P

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

HI 1083P

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

HI 1330P

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

HI 1332P

Plastic-body (Ultem®), double junction, refillable, combination pH electrode.

Use: general purpose.

ORP ELECTRODES

HI 3131P

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

Consult the Hanna General Catalog for more electrodes with BNC and pin connectors.

OTHER ACCESSORIES

HI 710005 Voltage adapter from 115 VAC to 12 VDC (USA plug) HI 710006 Voltage adapter from 230 VAC to 12 VDC (European plug) HI 710012 Voltage adapter from 240 VAC to 12 VDC (UK plug) HI 710013 Voltage adapter from 230 VAC to 12 VDC (South African plug) HI 710014 Voltage adapter from 230 VAC to 12 VDC (Australian plug) 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 7662-T Temperature probe with 1 m (3.3') cable HI 710032 Pack of 10 plain paper spare rolls (HI 123) HI 710033 Replacement ink cartridge (HI 123) HI 740157 Plastic electrode refilling pipet (20 pcs) 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 measurements in microwave ovens.

Hanna Instruments reserves the right to modify the design,

construction and appearance of its products without advance notice.

Australia:

Tel. (03) 9769.0666 • Fax (03) 9769.0699

China:

Tel. (10) 88570068 • Fax (10) 88570060

Egypt:

Tel. & Fax (02) 2758.683

Germany:

Tel. (07851) 9129-0 • Fax (07851) 9129-99

Greece:

Tel. (210) 823.5192 • Fax (210) 884.0210

Indonesia:

Tel. (21) 4584.2941 • Fax (21) 4584.2942

Japan:

Tel. (03) 3258.9565 • Fax (03) 3258.9567

Korea:

Tel. (02) 2278.5147 • Fax (02) 2264.1729

Malaysia:

Tel. (603) 5638.9940 • Fax (603) 5638.9829

Singapore:

Tel. 6296.7118 • Fax 6291.6906

South Africa:

Tel. (011) 615.6076 • Fax (011) 615.8582

Taiwan:

Tel. 886.2.2739.3014 • Fax 886.2.2739.2983

Thailand:

Tel. 66.2619.0708 • Fax 66.2619.0061

United Kingdom:

Tel. (01525) 850.855 • Fax (01525) 853.668

USA:

Tel. (401) 765.7500 • Fax (401) 765.7575

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

MAN123

05/05

SALES AND TECHNICAL SERVICE CONTACTS

Hanna Instruments HI 123 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual