Hanna Instruments HI 2550 User Manual

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Instruction Manual

HI 2550

Multiparameter

pH/ORP/°C EC/TDS/NaCl Bench Meter

www.hannainst.com

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

use of this instrument, as well as a precise idea of its versatility. If you need additional technical information, do not hesitate to e-mail us

at tech@hannainst.com.

WARRANTYWARRANTY

WARRANTY

WARRANTYWARRANTY

HI 2550 is 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

FUNCTIONAL DESCRIPTION .............................................................................. 4

SPECIFICATIONS ............................................................................................. 5

OPERATIONAL GUIDE ....................................................................................... 7

AUTO-RANGING ............................................................................................. 12

pH CALIBRATION ............................................................................................ 13

pH BUFFER TEMPERATURE DEPENDENCE .........................................................18

RELATIVE mV CALIBRATION .............................................................................. 19

ECS/TDS CALIBRATION .................................................................................... 19

CONDUCTIVITY VERSUS TEMPERATURE CHART ................................................... 21

NaCl CALIBRATION .........................................................................................22

GOOD LABORATORY PRACTICE (GLP) ................................................................. 23

LOGGING FUNCTION ....................................................................................... 28

SETUP .......................................................................................................... 36

TEMPERATURE CALIBRATION (FOR TECHNICAL PERSONNEL ONLY) ....................... 42

mV CALIBRATION (FOR TECHNICAL PERSONNEL ONLY) .......................................44

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

ELECTRODE CONDITIONING & MAINTENANCE .................................................... 51

TROUBLESHOOTING GUIDE .............................................................................. 54

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

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

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 1131B Glass-body Combination pH Electrode with 1 m (3.3')

Cable

• HI 76310 Conductivity / TDS probe

• HI 7662 Temperature Probe

• HI 76404N Electrode Holder

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

• HI 7071 Electrolyte Solution

• 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.

GENERAL DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

GENERAL DESCRIPTIONGENERAL DESCRIPTION

The HI 2550 is a microprocessor based pH, ORP, Conductivity (EC), TDS, NaCl, and Temperature Bench Meter. Relative mV feature is also provided.

pH measurements are compensated for temperature effect manually or automatically with the HI 7662 temperature probe.

Up to a five-point pH calibration can be performed using seven standard buffers and two custom buffers.

A calibration due alarm can be set to alert the user that too much time has elapsed since the last pH calibration.

Conductivity and TDS features auto-ranging, which automatically selects the scale with the highest resolution. Conductivity measurements are compensated for temperature manually or automatically with a temperature sensor located inside the probe. The temperature coefficient is user selectable. Temperature compensation can be disabled to measure actual conductivity.

The GLP feature provides data consistency. Data can be stored in the meters memory for later retrieval. The meters

memory can hold 200 manually logged points and 500 lot logging points.

An USB connection ensures communication with a PC.

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

Front Panel

Rear Panel

1) Liquid Crystal Display (LCD).

2) CAL key, to enter and exit calibration mode. RCL key (alternate function), to enter and exit memory recall.

3) CFM/GLP key, to confirm calibration selection, different setup values or to display Good Laboratory Practice information.

ºC key, to manually increase temperature value or other parameters.

TC key (alternate function), to view temperature coefficient value.

ºC key, to manually decrease temperature value or other parameters.

5) ATC key (alternate function), to select EC temperature compensation mode.

6) SETUP key, to enter/exit SETUP mode. LOCK key (alternate function), to freeze current EC range on the LCD.

7) RANGE key, to select measurement range (pH, mV, EC), switch to focused data in SETUP or toggle between buffer value and temperature during calibration. MODE key (alternate function) to select mV or Rel mV on mV range or EC, TDS, NaCl on EC range.

8) LOG/CLR key, to store a value into memory, to clear pH calibration, or to select to delete log records or lots.

9) ALT key, to select alternate function.

10) ON/OFF switch.

11) Power supply socket.

12) USB connector.

13) EC electrode connector.

14) BNC electrode connector.

15) Temperature probe socket.

16) Electrode reference socket.

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONSSPECIFICATIONS

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OPERATIONAL GUIDEOPERATIONAL GUIDE

OPERATIONAL GUIDE

OPERATIONAL GUIDEOPERATIONAL GUIDE

POWER CONNECTIONPOWER CONNECTION

POWER CONNECTION

POWER CONNECTIONPOWER CONNECTION

Plug the 12 VDC adapter into the power supply socket. Notes: • This instrument uses non volatile memory to retain the calibration

parameters and all other settings, even when unplugged.

• Make sure a fuse protects the main line.

ELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONS

ELECTRODE AND PROBE CONNECTIONS

ELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONS

For pH or ORP measurements connect an electrode with internal reference to the BNC connector on the back of the instrument.

For electrodes with a separate reference connect the electrode’s BNC to the BNC connector and the reference electrode plug to the reference socket.

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

For EC/TDS measurements connect the probe to the 7-pin connector. Make sure the probe sleeve is properly inserted.

INSTRUMENT STINSTRUMENT ST

INSTRUMENT ST

INSTRUMENT STINSTRUMENT ST

ARTART

ART

ARTART

-UP-UP

-UP

-UP-UP

• Turn the instrument on by pressing the ON/OFF switch located on

the rear panel.

• All LCD tags are displayed and a beep is sounded while the instruments perform a self test.

• The instrument will display “LoAd” message and “ ” blinking until initialization is complete.

Notes: • The instrument starts in the same range and mode as it was

at power off.

• The ALT&MODE keys change the measuring modes:

- mV or Rel mV

- EC or TDS or NaCl

• The RANGE key toggles between measurement ranges:

- pH, mV or Rel mV, EC or TDS or NaCl.

pH MEASUREMENTS

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

• Submerse the electrode tip and the temperature probe approximately 3 cm (1¼”) into the sample

3 cm

(1¼")

to be tested and stir gently. Allow time for the electrode to stabilize.

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

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

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.

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 submerse the HI 7662 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 used by disconnecting the temperature probe.

The display will show the last temperature reading with the “ºC” tag blinking.

The temperature can now be adjusted with the ARROW keys (from –20.0 ºC to 120.0 ºC).

mV/ORP MEASUREMENTSmV/ORP MEASUREMENTS

mV/ORP MEASUREMENTS

mV/ORP MEASUREMENTSmV/ORP MEASUREMENTS

An optional ORP electrode must be used to perform ORP measurements (see Accessories).

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

The surface of the ORP electrode must be clean and smooth in order to obtain an accurate measurement.

• Press RANGE to enter mV range.

• Submerse the tip of the ORP electrode (3 cm/1¼”) into the sample to be tested and allow a few seconds for the reading to stabilize.

3 cm

(1¼")

• The instrument displays the mV reading on the primary LCD and the temperature on the secondary LCD line.

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

RELATIVE mV MEASUREMENTSRELATIVE mV MEASUREMENTS

RELATIVE mV MEASUREMENTS

RELATIVE mV MEASUREMENTSRELATIVE mV MEASUREMENTS

• Press the ALT&MODE keys simultaneously while in mV range. The “rEL” and “mV” tags are displayed for about one second. After one second the temperature will be displayed on the secondary LCD and the “mV” tag will blink.

The reading displayed by the instrument is equal to the difference between the current mV input value and the relative mV offset established in the relative mV calibration.

CONDUCTIVITY MEASUREMENTSCONDUCTIVITY MEASUREMENTS

CONDUCTIVITY MEASUREMENTS

CONDUCTIVITY MEASUREMENTSCONDUCTIVITY MEASUREMENTS

Connect the conductivity probe to the instrument.

• Press the RANGE key to enter conductivity measurement range (EC).

• Submerse the probe into the solution to be tested. The sleeve holes must be completely submersed. Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve.

• The conductivity value will be displayed on the primary LCD and the temperature on the secondary LCD.

• If the reading is out of range, the full-scale value (200.0 for MTC/ATC mode or 500.0 for actual conductivity) will be displayed blinking.

• If LOCK key was pressed and the reading goes out of range, the full-scale value of the frozen range will be displayed blinking.

The conductivity reading is affected by temperature. Three options for temperature compensation are available in conductivity

measurement mode. Automatic (ATC): The conductivity probe has a built-in temperature

sensor; the temperature value is used to automatically compensate the EC/TDS reading.

Manual (MTC): The temperature value, shown on the secondary LCD, can be manually set with the ARROW keys. The “ºC” tag blinks when this option is active. This value will be used to compensate the EC/TDS reading.

No Compensation (notc): The temperature value is displayed, but not taken into account. When this option is selected the “ºC” tag will blink with slower frequency. The reading displayed on the primary LCD is the uncompensated EC or TDS value.

To select the desired option, press the ALT&ATC keys until the option is displayed on the LCD.

Notes:• The default compensation mode is ATC.

• If no temperature probe is detected, ATC mode can not be

selected and the instrument displays “----” on the secondary LCD.

If temperature compensation is selected, measurements are compensated using the temperature coefficient (default value 1.90 %/ºC). To change the temperature coefficient, enter the setup mode and select “tc” (see SETUP for details, page 36). The current temperature coefficient can be quickly viewed by pressing the ALT&TC keys. The value is briefly displayed on the secondary LCD.

• If the temperature reading exceeds the limits of the meter (–20.0 ºC to 120.0 ºC), the “ºC” tag will blink and the closest full scale value will be displayed.

TDS MEASUREMENTSTDS MEASUREMENTS

TDS MEASUREMENTS

TDS MEASUREMENTSTDS MEASUREMENTS

Press the ALT&MODE keys while in EC range. The instrument will switch to TDS measuring range. The TDS reading will be displayed on the primary LCD and the temperature reading on the secondary LCD.

• If the reading is out of range, the full-scale value (100.0 for MTC/ATC mode or 400.0 for uncompensated TDS) will be displayed blinking.

• If LOCK was pressed and the reading goes out of range, the full-scale value of the frozen range will be displayed blinking.

NaCl MEASUREMENTSNaCl MEASUREMENTS

NaCl MEASUREMENTS

NaCl MEASUREMENTSNaCl MEASUREMENTS

Press the ALT&MODE keys while in EC range until NaCl is displayed on the LCD. The instrument will display the NaCl reading on the primary LCD and the temperature reading on the secondary LCD line.

• If the reading is out of range, the full-scale value (400.0%) will be displayed blinking.

TEMPERATURE MEASUREMENTSTEMPERATURE MEASUREMENTS

TEMPERATURE MEASUREMENTS

TEMPERATURE MEASUREMENTSTEMPERATURE MEASUREMENTS

In pH and ORP mode, connect the HI 7662 temperature probe to the appropriate socket.

Submerse the temperature on the secondary LCD to stabilize.

In EC/TDS/NaCl range, the HI 76310 probe has a built-in temperature sensor.

probe

into the sample and allow the reading

AUTO-RANGINGAUTO-RANGING

AUTO-RANGING

AUTO-RANGINGAUTO-RANGING

The EC and TDS scales are auto-ranging. The meter automatically sets the scale with the highest possible resolution.

By pressing ALT&LOCK, the auto-ranging feature is disabled and the current range is frozen on the LCD. The “Auto” “Off” (auto-ranging disabled) tags will be displayed on the LCD for a few seconds. To restore the auto-ranging option, press ALT&LOCK again. The “Auto” “On” (auto-ranging enabled) tags will be displayed on the LCD for a few seconds.

Note: Auto-ranging is automatically restored if the range is changed, if

the setup or calibration modes are entered and if the meter is turned off and back on again.

H CALIBRATIONH CALIBRATION

H CALIBRATION

H CALIBRATIONH CALIBRATION

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

• Whenever the pH electrode is replaced.

• At least once a day.

• After testing aggressive chemicals.

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

Every time you calibrate the instrument use fresh buffers and perform an electrode Cleaning Procedure (see page 53).

PREPARATIONPREPARATION

PREPARATION

PREPARATIONPREPARATION

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 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 or 9.18 as second buffer.

PROCEDUREPROCEDURE

PROCEDURE

PROCEDUREPROCEDURE

Calibration can be performed at up to five-points. For accurate measurements, a three-point calibration is recommended. The calibration buffer can be selected from the calibration buffer list that

includes the custom buffers and the memorized standard buffers:

• pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45

The custom buffers allow 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 36). Each custom buffer value can be changed in a ±1.0 pH window around the set value, during calibration, when it is selected; the “BUFFER pH” tag will blink.

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

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

FIVEFIVE

POINTPOINT

FIVE

FIVEFIVE

CALIBRATION CALIBRATION

POINT

CALIBRATION

POINTPOINT

CALIBRATION CALIBRATION

• Submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) into a buffer solution and stir gently. The temperature probe should be close to the pH electrode.

• Press CAL. The “CAL” and “

BUF

” tags will

3 cm

(1¼")

appear and the “7.01” buffer will be displayed on the secondary LCD.

• 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 “READY” tag will be displayed and the “CFM” tag will blink.

• Press CFM to confirm calibration.

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

• After the first calibration point is confirmed, submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) 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, the “READY” tag will be displayed and the “CFM” tag will blink.

• Press CFM to confirm calibration.

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

• After the second calibration point is confirmed, submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) 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, the “READY” tag will be displayed and the “CFM” tag will blink.

• Press CFM to confirm calibration.

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

• After the third calibration point is confirmed, submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) 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, the “READY” tag will be displayed and the “CFM” tag will blink.

• Press CFM to confirm calibration.

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

• After the fourth calibration point is confirmed, submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) 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, the “READY” tag will be displayed and the “CFM” tag will blink.

• Press CFM to confirm the fifth calibration point.

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

FOUR, THREE OR TWO-POINT CALIBRATIONFOUR, THREE OR TWO-POINT CALIBRATION

FOUR, THREE OR TWO-POINT CALIBRATION

FOUR, THREE OR TWO-POINT CALIBRATIONFOUR, THREE OR TWO-POINT CALIBRATION

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

• Press CAL after the fourth, third or second calibration point was confirmed. The instruments will memorize the calibration data and return to measurement mode.

ONE-POINT CALIBRATIONONE-POINT CALIBRATION

ONE-POINT CALIBRATION

ONE-POINT CALIBRATIONONE-POINT CALIBRATION

Two SETUP selectable options are available: “Pnt” and “OFFS”. If the “Pnt” option is selected, the new calibration point overrides an

existing one. The adjacent slopes will be reevaluated. If the “OFFS” option is selected, an electrode offset correction is performed. The adjacent slopes will remain unchanged.

• Proceed as described in “FOUR, THREE or TWO-POINT CALIBRATION” section.

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

Notes: • If the value measured by the instrument is not close to the

selected buffer, “WRONG” “ ” and “WRONG” “ ” tags will blink alternately. Check if the correct buffer has been used, or clean the electrode by following the Cleaning Procedure (see page 53). If necessary, change the buffer or the electrode.

• When a custom buffer is displayed, the “BUFFER pH” tag

blinks. To change the custom buffer value in accordance with the buffer temperature proceed as described in “WORKING WITH CUSTOM BUFFERS” (see page 17).

• If the buffer temperature or the manual temperature

exceeds the temperature limits of the buffer, “WRONG” tag and temperature reading will blink.

• If “WRONG”, “BUFFER pH” tags and “OLD” message are

displayed blinking on the secondary LCD line, an inconsistency between new and previous (old) calibration is detected. Clear calibration parameters and proceed with calibration from the current calibration point. The instrument will keep all confirmed values during current calibration.

• To clear calibration parameters for all uncalibrated buffers

starting with current buffer, press CLR. The calibration will continue from the current point. If this procedure is performed while calibrating in the first calibration point, the instrument returns to measurement mode.

• Press RANGE to toggle between pH buffer,

calibration buffer number and temperature reading.

• Each time a buffer is confirmed, the new calibration data replaces the old calibration data for the corresponding buffer. If current buffer has no previous data stored and the calibration is not full (five buffers), the current buffer is added to the existing calibration. If the existing calibration is full, the instrument asks which buffer to replace.

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: If the replaced buffer is outside the ±0.2 pH window,

around each of the calibrated buffers, it is possible to select this buffer for next calibration during current calibration.

WORKING WITH CUSTOM BUFFERSWORKING WITH CUSTOM BUFFERS

WORKING WITH CUSTOM BUFFERS

WORKING WITH CUSTOM BUFFERSWORKING WITH CUSTOM BUFFERS

If a custom buffer was set in SETUP menu, it can be selected during calibration by pressing the ARROW keys. The “BUFFER pH” tag will blink.

Press SETUP if you want to adjust the buffer value. The buffer value will

start blinking. Use the ARROW keys to change the buffer value. After 5 seconds, the buffer value is updated. Press SETUP if you want to

change it again. Note: Custom buffer value can be adjusted in a ±1.00 pH window,

around the set value.

H BUFFER TEMPERATUREH BUFFER TEMPERATURE

H BUFFER TEMPERATURE

H BUFFER TEMPERATUREH BUFFER TEMPERATURE

DEPENDENCEDEPENDENCE

DEPENDENCE

DEPENDENCEDEPENDENCE

The 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.

PMETSREFFUBHp

CºFº86.110.468.610.781.910.0154.21

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514 76.100.459.601.793.942.0181.31

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5195 76.100.409.650.772.921.0108.21

0286 86.100.488.630.722.960.0126.21

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5359 96.130.448.699.611.929.931.21

04401 96.140.448.689.670.988.989.11

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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.

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

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09491 97.191.488.630.758.857.928.01

59302 18.102.498.640.738.867.937.01

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

RELATIVE RELATIVE

RELATIVE

RELATIVE RELATIVE

• Press CAL when the instrument is in RELATIVE mV measurement mode. The “mV” and “ ” tags will be displayed. Absolute mV is displayed on the primary LCD and “AbS” message is displayed on the secondary LCD.

• When the absolute reading is stable and in measurement range, the instrument asks for confirmation.

• If the reading is out of range, “WRONG” tag will be displayed.

• Press CFM to confirm the absolute value. The instrument will display

0.0 mV on the primary LCD and “rEL” message on the secondary LCD. In this moment the relative mV offset is equal to absolute mV reading.

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

• Press CFM to confirm the relative mV value. The instrument returns to measurement mode.

Note: The relative mV value can be changed only inside the relative mV

offset window (± 2000 mV).

EC/TDS CALIBRATIONEC/TDS CALIBRATION

EC/TDS CALIBRATION

EC/TDS CALIBRATIONEC/TDS CALIBRATION

Selectable calibration points for conductivity are 0.00 μS for offset and

84.0 μS, 1413 μS, 5.00 mS, 12.88 mS, 80.0 mS, 111.8 mS for slope.

Rinse the probe with calibration solution or deionized water. Submerse the probe into the solution. The sleeve holes must be completely submersed. Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve. To enter EC calibration, select the EC range and press CAL.

The “BUF” and “CAL” tags are displayed. The primary LCD will display the EC reading. The secondary LCD will display the value. The “ ” and “~” tags will blink.

Note: The TDS reading is automatically derived from the EC reading and

no specific calibration for TDS is needed. Pressing CAL when TDS range is selected has no effect.

For zero calibration, just leave the dry probe in the air. This calibration is performed in order to correct the reading at 0.00 μS. The slope is evaluated when the calibration is performed at any other point.

V CALIBRATIONV CALIBRATION

V CALIBRATION

V CALIBRATIONV CALIBRATION

CAL

BUF

Select the desired value with the ARROW keys, if necessary.

When the reading is stable, “READY” tag is displayed and “CFM” tag starts blinking on the LCD, asking for confirmation.

CAL

CFM READY

BUF

Press CFM to confirm calibration. The instrument stores the calibration value and returns

to measurement mode. Notes: • If the reading is too far from the expected value, the

“WRONG” and “ ” tags will blink. Calibration can not be confirmed.

In this case check if the calibration solution has been used or clean the probe by following the Cleaning Procedure (see page 53).

• If the meter is in ATC mode and the buffer temperature is

out of the 0.0 °C to 60.0 ºC interval, “WRONG” “ºC” tags and the temperature will blink.

CAL

WRONG

• For best results choose an EC buffer value close to the sample

to be measured.

• In order to minimize any EMC interference, use plastic or

glass beakers.

• It is possible to set the cell constant value directly, without

following the calibration procedure. To set the cell constant, enter SETUP mode and select “CEL” (see SETUP for details, page 36).

CONDUCTIVITY VERSUSCONDUCTIVITY VERSUS

CONDUCTIVITY VERSUS

CONDUCTIVITY VERSUSCONDUCTIVITY VERSUS

TEMPERATURE CHARTTEMPERATURE CHART

TEMPERATURE CHART

TEMPERATURE CHARTTEMPERATURE CHART

The conductivity of an aqueous solution is a measure of its ability to carry an electrical current by means of ionic motion.

The conductivity invariably increases with increasing temperature. It is affected by the type and number of ions in the solutions and by

the viscosity of the solution itself. Both parameters are temperature dependent. The dependency of conductivity on temperature is expressed as a relative change per Celsius degrees at a particular temperature, commonly as %/ºC.

The following table lists the temperature dependence of HANNA EC calibration buffers.

0307IH

1307IH

3307IH

4307IH

5307IH

CºFº

023 05176774600384004560672

514 02286985600535001470813

0105 033902017600695002385163

5195 0840174118600456005293604

618.06 0270137110700276004495514

716.26 0590199111700586003695424

814.46 0911152213700896002897334

912.66 03411152147003170020019244

0286 07611872167004270012013254

128.96 01911503187000470004017164

226.17 05121233197002570095011174

324.37 0932195311800567009701508

422.57 04621683128003870089012094

5277 08821314148000080081110005

628.87 03131044168003180083116905

726.08 073317641780003800751109

824.28 02631494198009480077116825

922.48 07831125109003680079113835

0368 02141845129002880081219745

138.78 07341575149000090093215

0308IH

1308IH

3308IH

(μ )mc/S

4308IH

(μ )mc/S

9307IH

5308IH

9308IH

(μ )mc/S

755

NaCl CALIBRATIONNaCl CALIBRATION

NaCl CALIBRATION

NaCl CALIBRATIONNaCl CALIBRATION

NaCl calibration is a one-point calibration at 100.0% NaCl. Use the HI 7037L calibration solution (sea water solution) as a 100% NaCl calibration solution.

Rinse the probe with some of the calibration solution or deionized water. Submerse the probe into HI 7037L solution. The sleeve holes must be completely submersed. Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve.

To enter NaCl calibration select the NaCl range and press CAL. The “BUF” and “CAL” tags are displayed. The primary LCD will display the NaCl reading in percentage. The secondary LCD will display “100”.

CAL

NaCl

BUF

The “

” and “~” tags will blink.

When the reading is stable, the “READY” tag will be displayed and the “CFM” tag starts blinking on the LCD, asking for confirmation.

CAL

CFM READY

NaCl

BUF

Press CFM to confirm calibration. The instrument stores the calibration value and returns to

measurement mode. Notes: • If the reading is too far from the expected value, “WRONG”

“ ” tags will blink. Calibration cannot be confirmed.

• If the temperature of the buffer is out of the 0.0 ºC to 60.0 ºC

temperature interval, the “WRONG” and “ºC” tags and the temperature will blink.

• If a new EC calibration is performed, the NaCl calibration is

automatically cleared. A new NaCl calibration is required.

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, EC and NaCl calibration is stored for the user to review when necessary.

EXPIRED CALIBRATIONEXPIRED CALIBRATION

EXPIRED CALIBRATION

EXPIRED CALIBRATIONEXPIRED CALIBRATION

For pH calibration, this instrument allows 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).

When calibration has expired the “CAL” and “INTV” tags will blink to warn the user that the instrument should be recalibrated.

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

If 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.

Note: If the instrument was not calibrated, the “CAL” “INTV” tags will

be displayed even if the feature is disabled in SETUP menu.

pH pH

CALIBRATION DATACALIBRATION DATA

CALIBRATION DATA

pH pH

CALIBRATION DATACALIBRATION DATA

Calibration data is stored automatically after a successful calibration. To view the pH calibration data, press GLP when the instrument is in pH

(mV) measurement mode. The instrument will display the time (hh:mm) of the last calibration.

Use the ARROW keys to scroll through the calibration data:

• The date (yyyy.mm.dd).

• The pH calibration offset.

mVCAL

• 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 order. The first pH calibration buffer:

The second pH calibration buffer:

The third pH calibration buffer:

CAL pH

BUF

The fourth pH calibration buffer:

CAL pH

BUF

The fifth pH calibration buffer:

CAL pH

BUF

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

that this buffer was not used during last calibration. Press and hold down the SETUP key if you want to see calibration date (or time if old calibration was performed on the same day as the current calibration).

• If “no bUF” message appears on the LCD, the instrument

informs you that calibration was performed in less than three points.

CAL

BUF

• Calibration Expiration status:

- if disabled.

- or the number of days until the calibration alarm will be displayed.

- or if expired (7 days ago).

CAL

INTV

• The instrument ID.

elative mVelative mV

elative mV

elative mVelative mV

CALIBRATION DATA CALIBRATION DATA

CALIBRATION DATA

CALIBRATION DATA CALIBRATION DATA

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

To view the Relative mV calibration data, press GLP when the instrument is in Relative mV measurement mode.

The instrument will display the time (hh:mm) of the last calibration.

CAL

TIME

Use the ARROW keys to scroll through the calibration data:

• The date (yyyy:mm:dd).

• The Relative mV calibration offset.

• The instrument ID.

EC CALIBRATION DATAEC CALIBRATION DATA

EC CALIBRATION DATA

EC CALIBRATION DATAEC CALIBRATION DATA

EC calibration data is stored automatically after a successful calibration. To view the EC calibration data, press GLP when the instrument is in EC

measurement mode. The instrument will display the time (hh:mm) of the last calibration.

Use the ARROW key to scroll through the calibration data:

• The date (yyyy:mm:dd).

• The EC calibration buffer.

• The cell constant.

• The calibration offset factor.

• The reference temperature.

• The temperature coefficient.

• The temperature compensation mode.

• The instrument ID.

aClaCl

CALIBRATION DATA CALIBRATION DATA

aCl

CALIBRATION DATA

aClaCl

CALIBRATION DATA CALIBRATION DATA

NaCl calibration data is stored automatically after a successful calibration. To view the NaCl calibration data, press GLP when the instrument is in NaCl measurement mode. The instrument will display the time (hh:mm) of the last calibration.

Use the ARROW key to scroll through the calibration data:

• The date (yyyy:mm:dd).

• The salinity coefficient.

• The cell constant.

• The reference temperature.

• The temperature compensation mode.

• The instrument ID.

Notes: • If no temperature compensation is selected during calibration,

the temperature coefficient is not displayed in GLP.

• Press GLP at any moment and the instrument will return to

measurement mode.

• If calibration has not been performed on the selected range,

the instrument displays “no CAL” message blinking.

CAL

LOGGING FUNCTIONLOGGING FUNCTION

LOGGING FUNCTION

LOGGING FUNCTIONLOGGING FUNCTION

Up to 700 logged samples can be stored into memory. 200 manually logged records and 500 lot logging records can be stored

in the memory. To select logging type enter SETUP menu.

LOGGING THE CURRENT DATA LOGGING THE CURRENT DATA

LOGGING THE CURRENT DATA

LOGGING THE CURRENT DATA LOGGING THE CURRENT DATA

(manual logging)(manual logging)

(manual logging)

(manual logging)(manual logging)

Select the manual logging mode in SETUP menu. To store the current reading into memory press LOG while the instrument

is in measurement mode. The instrument will display “MAn” on the primary LCD, the record

number on the secondary LCD and “LOG” tag for a few seconds (see example below: record No. 15):

followed by the number of free records:

If there are less than 6 memory locations remaining, the record number and “Lo” message will be displayed to alert the user.

If the log space is full (200 records), “FULL LOG” message will be displayed and no more data will be saved.

When LOG is pressed, a complete set of information is stored: date, time, pH, mV, EC, TDS, NaCl temperature and calibration data.

LOT LOGGINGLOT LOGGING

LOT LOGGING

LOT LOGGINGLOT LOGGING

Select “StAb” (stability logging) or the desired time interval. To start interval logging press LOG key while the instrument is in

measurement mode. When the selected interval is reached or when the reading is stable (for

log on stability), the instrument will display the current lot number on the primary LCD line, the record number on the secondary LCD line and the LOG tag (see example below: Lot 5 record 7)

followed by the number of free records on the corresponding memory space.

If stability logging is selected, a complete set of data is memorized every time the reading becomes stable after an unstable condition.

To stop interval logging press LOG key again. The “LOG” tag will be cleared.

Note: When pressing any key that is not active, while lot logging is

running, the following message is displayed for a few seconds.

VIEW LOGGED DATAVIEW LOGGED DATA

VIEW LOGGED DATA

VIEW LOGGED DATAVIEW LOGGED DATA

Press the ALT&RCL

keys while in measurement mode to retrieve the

stored information. If no data was logged for the current selected measurement range and

no lots are memorized, one of the next messages will be displayed:

LOG

No pH measurements records:

LOG

No Relative mV and mV records:

LOG mV

No EC records:

LOG

No TDS records:

LOG

No NaCl records:

LOG

Otherwise, the instrument will display the lot number on the primary LCD line, the number of records on the secondary, “LOG” tag and “CFM” blinking. If samples were logged on demand “MAn” will be displayed on the primary LCD and the number of samples logged on the secondary (see example below: manual log, 15 samples logged).

Press ARROW keys to select different lot.

Press CFM to view record information.

• If RCL was entered while in pH measurement range:

pHLOG

In Rel mV range:

In EC measurement range:

In TDS measurement range:

In NaCl measurement range:

Use the ARROW keys to scroll through the records.

Note: The instrument will automatically skip log records from other

measurement ranges.

To view additional information press RANGE:

For pH

• The mV value on the primary LCD and the temperature value on the secondary LCD.

• The time on the primary LCD, along with “TIME” tag and the record number on the secondary LCD.

LOG

TIME

• The date on the primary LCD, along with “DATE” tag.

• The calibration offset on the primary LCD and “OFS” message on the secondary LCD.

mVLOG

• The calibration slope on the primary LCD and “SLP” message on the secondary LCD.

LOG

• The interval for lot logging.

To delete manual logged records: press CFM while “ MAn” is displayed to view manually logged records. Press the CLR key, “dEL” and the record number will be displayed. Press CFM to delete. Use the ARROW keys to change the record number.

To delete a lot, use the ARROW keys to select the desired lot. Press CLR key, “dEL LOt” will appear on the display. Press CFM key to delete.

The “dEL” message is displayed on the primary LCD and the selected record on the secondary LCD, along with ”LOG” tag.

• The ARROW keys can be used to change the record or lot number.

• Press SETUP to delete all records/lots. The display will show “dEL” in the primary LCD and “ALL” in the secondary LCD.

• Press CFM to confirm delete. While deleting the “ ” tag will blink.

• Press CAL or RANGE or CLR to escape and return to the RCL screen.

• If “del ALL” option was selected, all the log on demand records or lots are deleted. While deleting the “ ” tag is displayed blinking.

• Press ALT&RCL exit record information and enter lot information.

• Press ALT&RCL again to return to measurement mode.

• If one or more records/lots were deleted the “ ” tag blinks until the log memory space is reorganized.

Note: If at least one record was deleted the log memory space will be

recognized in about 4-5 seconds. During this period the “ ” will blink.

For Relative mV and mV Range

• The temperature value, the mV absolute value, the time and the date as described above.

• The Relative mV offset.

mVLOG

For EC Range

• The time and date as described on pH Range.

• The EC on primary LCD and temperature value on the secondary LCD.

• The offset factor on the primary LCD and “OFS” message on the secondary LCD.

• The cell constant on the primary LCD and “CEL” message on the secondary LCD line.

• The reference temperature on the primary LCD and “rEF” message on the secondary LCD.

• The temperature coefficient on the primary LCD and “tc” message on the secondary LCD.

• The temperature compensation mode.

For TDS Range

• The temperature reading as described in pH range.

• The conductivity value on the primary LCD and the temperature value on the secondary LCD.

• The time and the date as described in pH Range.

• The TDS factor on the primary LCD and “cF” message on the secondary LCD.

• The reference temperature, the temperature coefficient, the temperature compensation mode and the cell constant as described in EC Range.

For NaCl Range

• The conductivity and temperature reading value as described in TDS Range.

• The time and date as described in pH Range.

• The salinity factor on the primary LCD and “cF” message on the secondary LCD, with “LOG” and “NaCl” tags displayed.

• The reference temperature, the temperature compensation mode and the cell constant message as described above.

LOG

NaCl

Note: After LOG is pressed or “dEL” is confirmed, the instrument will

display the amount of free log space for about one second (example 25 records free).

Press the ALT&RCL keys to leave RECALL mode at any time.

Note: When an information that does not display the record number

is selected, pressing the SETUP key will display the record number on the secondary LCD line.

SETUPSETUP

SETUP

SETUPSETUP

Setup mode allows viewing and modifying the following instrument parameters.

In according with the selected range, SETUP menu allows the possibility to view and /or change specific range parameters and common parameters (for all the ranges).

The common parameters are:

• Log interval

• Current Time (hour & minute)

• Current Date (year, month & day)

• Beep Status

• Instrument Id

• Temperature Unit

The specific parameters are:

In pH range

• Expired Calibration Alarm

• First Custom Buffer

• Second Custom Buffer

• One-point Calibration Behavior

• pH Resolution

In EC/TDS/NaCl range

• Cell Constant

• TDS Factor

• Temperature Compensation Coefficient

• Reference Temperature

To enter SETUP mode press SETUP while the instrument is in measurement mode.

Select a parameter with the ARROW keys. Press CAL to change a parameter value. The selected parameter will

start blinking. Press RANGE to toggle between displayed parameters. Press the ARROW keys to increase or decrease the displayed value. Press CFM to save the modified value or CAL to escape without saving.

EXPIRED CALIBRATION ALARMEXPIRED CALIBRATION ALARM

EXPIRED CALIBRATION ALARM

EXPIRED CALIBRATION ALARMEXPIRED CALIBRATION ALARM

Press CAL when the calibration time-out is displayed. Calibration time-out (“OFF” or “1” to “7” days) will start blinking.

Press the ARROW Press CFM to save the modified calibration time-out value. Press CAL to escape without saving.

LOG INTERVALLOG INTERVAL

LOG INTERVAL

LOG INTERVALLOG INTERVAL

Press CAL when log interval is displayed. The log interval is selected blinking (“MAn” for log on demand, “StAb” log on stability, interval in seconds or minutes).

Press the ARROW keys to change the custom buffer value. Press CFM to confirm the selection. Press CAL to escape without saving.

FIRST CUSTOM BUFFERFIRST CUSTOM BUFFER

FIRST CUSTOM BUFFER

FIRST CUSTOM BUFFERFIRST CUSTOM BUFFER

Press CAL when “cb1” is displayed. The custom buffer (disabled – “no” or “0” to “16” pH) will start blinking.

Press the ARROW keys to change the custom buffer value. Press CFM to save the modified custom buffer value. Press CAL to escape without saving.

SECOND CUSTOM BUFFERSECOND CUSTOM BUFFER

SECOND CUSTOM BUFFER

SECOND CUSTOM BUFFERSECOND CUSTOM BUFFER

Press CAL when “cb2” is displayed. The custom buffer (disabled – “no” or “0” to ”16” pH) will start blinking.

keys to change the calibration time-out value.

Press the ARROW keys to change the custom buffer value. Press CFM to save the modified custom buffer value. Press CAL to escape without saving.

Note: To remove a custom buffer from the calibration list enter custom

buffer press CAL key then press CLR key. The “no” “cb1” or “cb2” message will be displayed and the instrument return for the SETUP parameter scroll mode.

ONE-POINT CALIBRATION BEHAVIORONE-POINT CALIBRATION BEHAVIOR

ONE-POINT CALIBRATION BEHAVIOR

ONE-POINT CALIBRATION BEHAVIORONE-POINT CALIBRATION BEHAVIOR

Press CAL when “1 Pnt” message is displayed on the secondary LCD. One of the two options (“Pnt” or “OFFS”) will start blinking (see pH CALIBRATION PROCEDURE for details, page 13).

Press the ARROW keys to toggle between “Pnt” and “OFFS” options. Press CFM to save the behavior for one-point calibration. Press CAL to escape without saving.

pH RESOLUTIONpH RESOLUTION

pH RESOLUTION

pH RESOLUTIONpH RESOLUTION

Press CAL when “rES” message is displayed on the secondary LCD. The set resolution (“0.1”, “0.01” or “0.001”) will start blinking.

Press the ARROW keys to toggle between 0.1, 0.01 and 0.001 options. Press CFM to save the modified value. Press CAL to escape without saving.

CURRENT TIMECURRENT TIME

CURRENT TIME

CURRENT TIMECURRENT TIME

Press CAL when the current time is displayed. The hour will start blinking.

Press the ARROW Press RANGE. The minutes will start blinking.

Press the ARROW keys to change the minutes. Press CFM to save the modified value. Press CAL to escape without saving.

keys to change the hour.

CURRENT DATECURRENT DATE

CURRENT DATE

CURRENT DATECURRENT DATE

Press CAL when the current date is displayed. The year will start blinking.

Press the ARROW Press RANGE. The month will start blinking.

Press the ARROW Press RANGE. The day will start blinking.

Press the ARROW keys to change the day. Press CFM to save the modified value. Press CAL to escape without saving.

BEEP STATUSBEEP STATUS

BEEP STATUS

BEEP STATUSBEEP STATUS

Press CAL when the beep status is displayed. Beep status (“On” or “OFF”) will start blinking.

Press the ARROW Press CFM to save the modified beep status. Press CAL to escape without saving. When enable, 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.

keys to change the year.

keys to change the month.

keys to change the beep status (On or OFF).

NSTRUMENT IDNSTRUMENT ID

NSTRUMENT ID

NSTRUMENT IDNSTRUMENT ID

Press CAL when “InId” is displayed. The instrument ID (“0000“ to “9999“) will start blinking.

Press the ARROW Press CFM to save the modified instrument ID value. Press CAL to escape without saving.

Note: The instrument ID is downloaded to a PC as part of a logged

data, set to identify its origin.

TEMPERATURE UNITTEMPERATURE UNIT

TEMPERATURE UNIT

TEMPERATURE UNITTEMPERATURE UNIT

Press CAL when “tnP“ is displayed. The temperature unit will start blinking.

Press the ARROW keys to change the option. Press CFM to save the modified temperature unit. Press CAL to escape without saving.

CELL CONSTANTCELL CONSTANT

CELL CONSTANT

CELL CONSTANTCELL CONSTANT

Press CAL when the cell constant is displayed. The cell constant will start blinking.

keys to change the instrument ID value.

Press the ARROW keys to change the cell constant (0.500 to 1.700). Press CFM to save the modified cell constant. Press CAL to escape without saving.

TDS FACTORTDS FACTOR

TDS FACTOR

TDS FACTORTDS FACTOR

Press CAL when “tdS” is displayed. The TDS factor will start blinking.

Press the ARROW keys to change the TDS factor (0.40 to 0.80). Press CFM to save the modified TDS factor. Press CAL to escape without saving.

TEMPERATURE COMPENSATION COEFFICIENTTEMPERATURE COMPENSATION COEFFICIENT

TEMPERATURE COMPENSATION COEFFICIENT

TEMPERATURE COMPENSATION COEFFICIENTTEMPERATURE COMPENSATION COEFFICIENT

Press CAL when the temperature compensation coefficient is displayed. The temperature compensation coefficient will start blinking.

Press the ARROW keys to change the temperature compensation coefficient. (0.00 to 6.00 %/ºC). Press CFM to save the modified temperature compensation coefficient.

Press CAL to escape without saving.

REFERENCE TEMPERATUREREFERENCE TEMPERATURE

REFERENCE TEMPERATURE

REFERENCE TEMPERATUREREFERENCE TEMPERATURE

Press CAL when the reference temperature is displayed. The reference temperature will start blinking.

Press the ARROW keys to toggle between 20.0 ºC and 25.0 ºC reference temperature value.

Press CFM to save the modified reference temperature value. Press CAL to escape without saving.

TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION

TEMPERATURE CALIBRATION

TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION

((

for technical personnel onlyfor technical personnel only

(

for technical personnel only

((

for technical personnel onlyfor technical personnel only

The instrument has two temperature channels: one that measures the temperature from the HI 7662 probe while the instrument is in pH/mV range and the other that measures temperature from the EC probe while the instrument is in EC/TDS/NaCl range.

All the instruments are factory calibrated for temperature on both channels. 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 (around 50 ºC). Place insulation material around the vessels to minimize temperature changes.

• Use a calibrated thermometer with a resolution of 0.1 ºC as a reference thermometer. Connect the HI 7662 probe to the appropriate socket for the pH temperature channel or the HI 76310 probe for the EC temperature channel.

• With the instrument off, press and hold down the CFM & SETUP keys, then power on the instrument to calibrate the pH temperature channel or &RANGE keys and then power on the instrument to calibrate the EC temperature channel. The “CAL” tag will appear and the secondary LCD will show “0.0 ºC“.

CAL

))

)

))

• Submerse the temperature probe (or EC probe) in the vessel with ice and water as near as possible to the calibrated 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 calibrated thermometer. When the reading is stable and close to the selected calibration point, “READY” tag will appear and “CFM” tag will blink.

• Press CFM to confirm. The secondary LCD will show “50.0 ºC“.

CAL

• Submerse the temperature probe (or EC probe) in the second vessel as near as possible to the calibrated 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, “READY” tag will appear and “CFM” tag will blink.

• Press CFM to confirm. The instrument memorize calibration and restart in measurement mode.

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

“WRONG” tag will blink. Change the temperature probe (or EC probe) and restart calibration.

V CALIBRATIONV CALIBRATION

V CALIBRATION

V CALIBRATIONV CALIBRATION

((

for technical personnel onlyfor technical personnel only

(

for technical personnel only

((

for technical personnel onlyfor technical personnel only

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 mV 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-point calibration can be performed at 0.0 mV and 1800.0 mV.

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

• 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 mV“.

• Set 0.0 mV on the simulator. When the reading is stable and close to the selected calibration

point, “READY” tag will appear and “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, “READY” tag will appear and “CFM” tag will blink.

• Press CFM to confirm. The instrument memorize calibration and

restart 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.

• Pressing CAL key during calibration process the instrument

quit calibration mode and restart to measurement mode without memorizing calibration.

))

)

))

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 a standard 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 USB port of your PC.

Note: If you are not using Hanna Instruments HI 92000 software,

please see the following instructions.

SENDING COMMANDS FROM PCSENDING COMMANDS FROM PC

SENDING COMMANDS FROM PC

SENDING COMMANDS FROM PCSENDING COMMANDS FROM PC

It is also possible to remotely control the instrument with any terminal program. Use a standard 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, 9600 baud rate.

COMMAND TYPESCOMMAND TYPES

COMMAND TYPES

COMMAND TYPESCOMMAND TYPES

To send a command to the instrument the scheme is:

where: <command prefix> is a selectable ASCII character

between 0 and 47. <command> is the command code (3 characters).

Note: Either small or capital letters can be used.

SIMPLE COMMANDSSIMPLE COMMANDS

SIMPLE COMMANDS

SIMPLE COMMANDSSIMPLE COMMANDS

RNG Is equivalent to pressing RANGE 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 SET Is equivalent to pressing SETUP LOG Is equivalent to pressing LOG MOD Is equivalent to pressing MODE GLP Is equivalent to pressing GLP CLR Is equivalent to pressing CLR RCL Is equivalent to pressing RCL

CHRxx Change the instrument range according with the parameter

value (xx):

• xx=00 pH range/0.001 resolution

• xx=01 pH range/0.01 resolution

• xx=02 pH range/0.1 resolution

• xx=03 mV range

• xx=04 Relative mV range

• xx=06 EC range

• xx=07 TDS range

• xx=08 NaCl range

The instrument sends the “ACK” (6) character every time a command is recognized and a “NAK” (21) character for invalid commands.

COMMANDS REQUIRING AN ANSWERCOMMANDS REQUIRING AN ANSWER

COMMANDS REQUIRING AN ANSWER

COMMANDS REQUIRING AN ANSWERCOMMANDS 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.

• Conductivity and temperature reading on EC range.

• TDS and temperature reading on TDS range.

• NaCl and temperature reading on NaCl range.

The answer string contains:

• Meter mode (2 chars):

• 00 - pH range (0.001 resolution)

• 01 - pH range (0.01 resolution)

• 02 - pH range (0.1 resolution)

• 03 - mV range

• 04 - Rel mV range

• 06 - EC range

• 07 - TDS range

• 08 - NaCl range

• 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

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

• Primary reading (corresponding to the selected range)

- 7 ASCII chars, including sign and decimal point.

• Secondary reading (only when primary reading is not mV, EC, NaCl, TDS) - 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. GLP Requests the calibration data record.

The answer string contains:

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

• 0x01 - pH calibration available

• 0x02 - Rel mV calibration available

• 0x04 - EC calibration available

• 0x08 - NaCl calibration available

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

• the number of calibrated buffers (1 char)

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

• 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

(7 chars).

• the calibration time, yymmddhhmmss (12 chars).

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

• the calibration offset, with sign (7 chars)

• the calibration time, yymmddhhmmss (12 chars).

• EC calibration data (if available), which contains:

• the number of calibrated standards (1 char)

• the offset factor, with sign and decimal point

(7 chars)

• the cell constant, with sign and decimal point

(7 chars)

• the calibration time, yymmddhhmmss (12 chars)

• standards information (for each standard)

• standard value, with sign and decimal point (7 chars).

• buffer unit (2 chars; 00-μS; 01-mS)

• Reference Temperature with and decimal point (4 chars)

• Temperature Compensation mode (2 chars)

• 00 - no temperature compensation

• 01 - automatic tempe rature compensation

• 00 - manual temperature compensation

• TC coeficient with sign and decimal point (4 chars)

• calibration time, yymmddhhmmss (12 chars).

• Na Cl Calibration data

• the number of calibrated data (1 char)

• salinity coeficient, with sign and decimal point (7 chars)

• Cell constant, with sign and decimal point (2 chars)

• the calibration time (2 chars)

• buffer information, for each buffer:

• Reference Temperature with and decimal point (4 chars)

• Temperature Compensation mode (2 chars)

• 00 - no temperature compensation

• 01 - automatic tempe rature compensation

• 00 - manual temperature compensation

• TC coeficient with sign and decimal point (4 chars)

• calibration time, yymmddhhmmss (12 chars).

PAR Requests the setup parameters setting. The answer string contains:

• Instrument ID (4 chars)

• Calibration alarm time out for pH range (2 chars)

• 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)

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

• Log type 2 chars 01 - manual log 02 - stability lot log 03 to 14 - the coresponding interval for lot log (5 s

to 180 min)

• cell constant, with sign and decimal point (6 chars)

• TDS factor, with sign and decimal point (5 chars)

• TC coef, with sign and decimal point (5 chars)

• Reference Temperature, with sign and decimal point (5 chars)

• Temperature Compensation mode (1 char)

NSLx Requests the number of logged samples.

x = P - request for pH range

M - request for mV range E - request for EC range N - request for NaCl range T - request for TDS range

LODxnnn: request the”nnn” record of the manual log on the “x” range LODxALLff: groups all Log On Demand Records in frames of 8 records

each for the selected range

Command Parameters:

x - range (see Note) ALL - download all records for the selected range ff - requested frame number - first frame is labeled 01

LLsxff: requests information about all lots on the specified range, it sends the information in frames of 10 lots each (a frame contains information about 10 lots)

Command Parameters:

x - range (see Note) ff - requested frame number - first frame is labeled 01

GLDxxxff: Requests the records of the “xxx” lot number. The records are

sent in frames of 10 records; “ff” is the frame number (01 first frame). (Example: Lot 13 has 53 records. The records will be sent in 6 frame, 5 with10 records and 1 with 3 records.)

Command Parameters:

xxx - Lot number (eq: for lot number 1 xxx = 001) ff - requested frame number - first frame is labeled 01

Errors:• “Err3” log on demand empty.

• “Err4” requested set parameter is not available.

• “Err5” command argument is wrong.

• “Err6” requested range not available.

• “Err7” meter in log mode.

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

• “NAK” (21) character is sent when the instrument receives an unknown or a corrupted command.

Note: P - request for pH range.

M - request for mV range. E - request for EC range. T - request for TDS range. N - request for NaCl range.

ELECTRODE CONDITIONINGELECTRODE CONDITIONING

ELECTRODE CONDITIONING

ELECTRODE CONDITIONINGELECTRODE CONDITIONING

& MAINTENANCE& MAINTENANCE

& MAINTENANCE

& MAINTENANCE& MAINTENANCE

PREPARATION PROCEDUREPREPARATION PROCEDURE

PREPARATION PROCEDURE

PREPARATION PROCEDUREPREPARATION PROCEDURE

Remove the protective cap of the pH electrode. DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal

with electrodes. They will disappear when rinsed with water. During transport, tiny bubbles of air may form inside the glass bulb

affecting proper functioning of the electrode. These bubbles can be removed by “shaking down” the electrode as you would do with a glass thermometer.

If the bulb and/or junction is dry, soak the electrode in HI 70300 or

HI 80300

Storage Solution for at least one hour.

For refillable electrodes:For refillable electrodes:

For refillable electrodes:

For refillable electrodes:For refillable electrodes:

If the filling solution (electrolyte) is more than 2½ cm (1”) below the fill hole, add HI 7082 or HI 8082 3.5M KCl Electrolyte Solution for double junction or HI 7071 or HI 8071 3.5M KCl+AgCl Electrolyte Solution for single junction electrodes.

For faster response, unscrew the fill hole screw during measurements.

®®

For AMPHELFor AMPHEL

For AMPHEL

For AMPHELFor AMPHEL

®®

electrodes: electrodes:

electrodes:

electrodes: electrodes:

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

MEASUREMENTMEASUREMENT

MEASUREMENT

MEASUREMENTMEASUREMENT

Rinse the pH electrode tip with distilled water. Submerse the tip (3 cm /1¼”) 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.

Take care that the sleeve holes of the EC probe are completely submersed. Tap the probe repeatedly to remove air bubbles that may be trapped inside the sleeve.

STORAGE PROCEDURESTORAGE PROCEDURE

STORAGE PROCEDURE

STORAGE PROCEDURESTORAGE 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 53 before taking measurements.

Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER.

PERIODIC MAINTENANCEPERIODIC MAINTENANCE

PERIODIC MAINTENANCE

PERIODIC MAINTENANCEPERIODIC 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 Electrode 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 and HI 7082 or HI 8082 for double junction electrodes).

Allow the electrode to stand upright for 1 hour. Follow the Storage Procedure above.

pH pH

ELECTRODE CLEANING PROCEDUREELECTRODE CLEANING PROCEDURE

ELECTRODE CLEANING PROCEDURE

pH pH

ELECTRODE CLEANING PROCEDUREELECTRODE 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.

EC Probe MaintenanceEC Probe Maintenance

EC Probe Maintenance

EC Probe MaintenanceEC Probe Maintenance

Rinse the probe with clean water after measurements. If a more thorough cleaning is required, remove the probe sleeve and clean the probe with a cloth or a nonabrasive detergent. Make sure to reinsert the sleeve onto the probe properly and in the right direction. After cleaning the probe, recalibrate the instrument.

The platinum rings support is made of glass. Take great care while handling the probe.

TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE

TROUBLESHOOTING GUIDE

TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE

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TEMPERATURE CORRELATIONTEMPERATURE CORRELATION

TEMPERATURE CORRELATION

TEMPERATURE CORRELATIONTEMPERATURE CORRELATION

FOR FOR

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.

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 Less than 4 months 120 ºC 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 Concentration pH Error

0.1 Mol L-1 Na

1.0 Mol L-1 Na

H SENSITIVE GLASSH SENSITIVE GLASS

H SENSITIVE GLASS

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

ACCESSORIESACCESSORIES

ACCESSORIES

ACCESSORIESACCESSORIES

pH BUFFER SOLUTIONS

HI 70004P pH 4.01 Buffer Sachets, 20 mL, 25 pcs HI 70007P pH 7.01 Buffer Sachets, 20 mL, 25 pcs HI 70010P pH 10.01 Buffer Sachets, 20 mL, 25 pcs HI 7001L pH 1.68 Buffer Solution, 500 mL HI 7004L pH 4.01 Buffer Solution, 500 mL HI 7006L pH 6.86 Buffer Solution, 500 mL HI 7007L pH 7.01 Buffer Solution, 500 mL HI 7009L pH 9.18 Buffer Solution, 500 mL HI 7010L pH 10.01 Buffer Solution, 500 mL 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

pH ELECTRODE STORAGE SOLUTIONS

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

CLEANING SOLUTIONS

HI 7061M General Cleaning Solution, 250 mL bottle HI 7061L General Cleaning Solution, 500 mL bottle HI 8061M General Cleaning Solution, 250 mL bottle FDA approved bottle HI 8061L General Cleaning Solution, 500mL bottle FDA approved bottle HI 70000P Electrode Rinse Sachets, 20 mL, 25 pcs HI 7073L Protein Cleaning Solution, 500 mL HI 7074L Inorganic Cleaning Solution, 500 mL HI 7077L Oil & Fat Cleaning Solution,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

pH 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

ORP PRETREATMENT SOLUTIONS

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

CONDUCTIVITY SOLUTIONS

HI 70030P 12880 μS/cm (μmho/cm), 20 mL sachets (25 pcs.) HI 70031P 1413 μS/cm (μmho/cm), 20 mL sachets (25 pcs.) HI 70033P 84 μS/cm (μmho/cm), 20 mL sachets (25 pcs.) HI 70039P 5000 μS/cm (μmho/cm), 20 mL sachets (25 pcs.) HI 7030M 12880 μS/cm (μmho/cm), 250 mL bottle HI 7031M 1413 μS/cm (μmho/cm), 250 mL bottle HI 7033M 84 μS/cm (μmho/cm), 250 mL bottle HI 7030M 12880 μS/cm (μmho/cm), 250 mL bottle HI 7034M 80000 μS/cm (μmho/cm), 250 mL bottle HI 7035M 111800 μS/cm (μmho/cm), 250 mL bottle HI 7039M 5000 μS/cm (μmho/cm), 250 mL bottle HI 7030L 12880 μS/cm (μmho/cm), 500 mL bottle HI 7031L 1413 μS/cm (μmho/cm), 500 mL bottle HI 7033L 84 μS/cm (μmho/cm), 500 mL bottle HI 7034L 80000 μS/cm (μmho/cm), 500 mL bottle HI 7035L 111800 μS/cm (μmho/cm), 500 mL bottle HI 7039L 5000 μS/cm (μmho/cm), 500 mL bottle HI 7037L 100% NaCl sea water standard solution, 500 mL bottle HI 8030L 12880 μS/cm (μmho/cm), 500 mL FDA approved bottle HI 8031L 1413 μS/cm (μmho/cm), 500 mL FDA approved bottle HI 8033L 84 μS/cm (μmho/cm), 500 mL FDA approved bottle HI 8034L 80000 μS/cm (μmho/cm), 500 mL FDA approved bottle HI 8035L 111800 μS/cm (μmho/cm), 500 mL FDA approved bottle HI 8039L 5000 μS/cm (μmho/cm), 500 mL FDA approved bottle

TDS SOLUTIONS

HI 70080C 800 ppm (mg/L), 20 mL (25 pcs.) HI 70080P 800 ppm (mg/L), 20 mL (25 pcs.) HI 70032C 1382 ppm (mg/L), 20 mL (25 pcs.) HI 70032P 1382 ppm (mg/L), 20 mL (25 pcs.) HI 77300C 1382 ppm (mg/L) & pH 7.01, 20 mL (10 pcs.) HI 77300P 1382 ppm (mg/L) & pH 7.01 20 mL (10 pcs.) HI 70442C* 1500 ppm (mg/L), 20 mL (25 pcs.) HI 70442P* 1500 ppm (mg/L), 20 mL (25 pcs.) HI 77200C* 1500 ppm (mg/L) & pH 7.01, 20 mL (10 pcs.) HI 77200P* 1500 ppm (mg/L) & pH 7.01, 20 mL (10 pcs.) HI 7032M 1382 ppm (mg/L), 250 mL HI 7032L 1382 ppm (mg/L), 500 mL

HI 70442M* 1500 ppm (mg/L), 250 mL HI 70442L* 1500 ppm (mg/L), 500 mL

* 1500 ppm TDS have an approximate conversion factor of:

0.65 ppm = 1 μS/cm conversion rate.

pH ELECTRODES

All electrodes part numbers ending in B are supplied with a BNC connector and 1 m (3.3') cable, as shown below :

HI 1043B

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

HI 1053B

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

HI 1083B

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

HI 1131B

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

HI 1330B

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

HI 1331B

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

HI 1230B

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

HI 2031B

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

HI 1332B

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

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.

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.

HI 3230B

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

HI 4430B

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

Consult the Hanna General Catalog for more electrodes with screw-type or BNC connectors.

EXTENSION CABLE FOR SCREW-TYPE ELECTRODES (SCREW TO BNC ADAPTER)

HI 7855/1 Extension cable 1 m (3.3') long HI 7855/3 Extension cable 3 m (9.9') long

HI 7855 SERIES CABLE CONNECTORS

CONNECTOR AND 3.0 mm (0.12") CABLE WITH BNC

CONNECT TO SCREW TYPE ELECTRODES

CONNECT TO THE

BNC SOCKET

OF THE METER

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 Africa

plug)

HI 710014 Voltage adapter from 230 VAC to 12 VDC (Australia

plug)

ChecktempC Pocket-size thermometer (range –50.0 to 150.0 ºC) HI 76404N Electrode holder

HI 8427 pH and ORP electrode simulator with 1 m (3.3') coaxial

cable ending in female BNC connectors

HI 931001 pH and ORP electrode simulator with LCD and 1 m (3.3')

coaxial cable ending in female BNC connectors

HI 76310 Platinum 4-ring conductivity/TDS probe with temperature

sensor and 1 m (3.3') cable

HI 7662 Temperature probe with 1 m (3.3') cable HI 92000 Windows® compatible software.

Windows® is registered Trademark of "Microsoft Co."

RECOMMENDATIONS FOR USERS

Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument 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 instrument’s EMC performance. To avoid electrical shock, do not use this instrument 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.

Hanna Instruments Inc.

Highland Industrial Park 584 Park East Drive Woonsocket RI 028985 USA

Local Sales and Customer Service office

Hanna Instruments United States Inc.

Highland Industrial Park

584 Park East Drive

Woonsocket RI 028985 USA

Tel. (800) 426 6287

Fax (401) 765 7575

www.hannainst.com/usa

Technical Support for customers

Telephone (800) 426 6287

Fax (401) 765 7575

E-mail tech@hannainst.com

Printed in Romania, EU

MAN2550 04/09

Hanna Instruments HI 2550 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual