Hanna Instruments HI 253 User Manual

Download

Instruction Manual

Functions

pH Calibration - 3 points

RCL

LOG

CLR

SET

RANGE

GLP

CFM

CAL

pH / ORP / Ion Meter

HI 253

Confirm Calibration

in selected pH Buffer

CFM

Select pH Buffer

Start/Exit Calibration

CAL

Select pH/ORP/ mV/Ion

Scroll Log Data

Rel

RANGE

GLP

Show GLPData

LOG

StoreLog Data

SET/CLR

Set Instrument Parameters

Clear Calibration/Log Data

RCL

RecallLog Data

HI 253

Microprocessor-Based

pH/mV/Ion/ºC

Bench Meter

www.hannainst.com

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

the 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 or turn to the back cover for our worldwide contact list. This instrument is in compliance with directives.

WARRANTY

HI 253 is guaranteed for two years against defects in workmanship and materials when used for its 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 ................................................................................................ 4

HI 253 SPECIFICATIONS .................................................................................................... 5

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

pH CALIBRATION ................................................................................................................ 10

ION CALIBRATION ............................................................................................................... 13

GOOD LABORATORY PRACTICE (GLP)....................................................................................15

LOGGING FUNCTION..............................................................................................................18

SETUP................................................................................................................................... 22

TEMPERATURE CALIBRATION (for technical personnel only)............................................ 26

mV CALIBRATION (for technical personnel only)............................................................... 27

RELATIVE mV CALIBRATION............................................................................................... 28

PC INTERFACE .................................................................................................................... 29

pH VALUES AT DIFFERENT TEMPERATURES .................................................................... 31

ELECTRODE CONDITIONING & MAINTENANCE .................................................................. 32

TROUBLESHOOTING GUIDE ............................................................................................... 35

TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ............................................... 36

ACCESSORIES ...................................................................................................................... 37

PRELIMINARY 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 7669/2W Temperature Probe

• HI 76404 Electrode Holder

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

• HI 7071S 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 DESCRIPTION

The HANNA HI 253 is a logging microprocessor-based pH, mV, Ion and temperature bench meter. Relative mV feature is also provided.

pH measurements are compensated for temperature effect manually or automatically with the HI 7669/2W temperature probe.

One, two or three-point calibration is possible, using five memorized buffers (4.01, 6.86, 7.01, 9.18 and 10.01 pH).

The GLP feature provides a guarantee of data consistency. An alarm time-out is available to alert the user that too much time elapsed

since the last pH calibration. The instrument can store data in memory at the user’s request for later

retrieval.

Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice.

FUNCTIONAL DESCRIPTION

Front Panel

Primary LCD

Secondary LCD

POWER 12VDC

INPUT

REF

TEMP

12 13 14

Rear Panel

CAL

CFM READY

1 2 3

BUF

WRONG

LOG mVpH

TIME% DATE INTV

BUFFER pH

RS232

Functions pH Calibration - 3 points

RCL

LOG

CLR

SET

RANGE

GLP

CFM

CAL

CFM

CAL

RANGE

GLP

LOG

SET/CLR

RCL

pH / ORP / Ion Meter

HI 253

Confirm Calibration in selected pH Buffer

Select pH Buffer

Start/Exit Calibration

Select pH/ORP/ mV/Ion Scroll Log Data

Rel

Show GLPData

StoreLog Data

Set Instrument Parameters Clear Calibration/Log Data

Recall Log Data

ppm

1) Liquid Crystal Display (LCD).

2) CFM/GLP key, to confirm different values or to display Good Laboratory Practice information.

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

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

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

6) RCL key, to enter/exit recall mode.

7) LOG key, to store measured data.

8) SET/CLR key, to enter/exit setup mode, clear pH calibration or delete logged data.

9) RANGE key, to select measurement range or to switch focused data.

10) ON/OFF switch.

11) Power supply socket.

12) BNC electrode connector.

13) Electrode reference socket.

14) Temperature probe socket.

15) RS232 serial communication connector.

HI 253

EGNAR

Hp0.61ot0.2–

Hp00.61ot00.2–

Hp000.61ot000.2–

Vm9.996±

Vm0002±

mpp99991ot100.0

Cº0.021ot9.9–

NOITULOSER

Hp1.0

Hp10.0

Hp100.0

)Vm9.996±(Vm1.0

)Vm0002±(Vm1

mpp)999.9ot100.0(100.0 mpp)99.99ot01(10.0 mpp)9.999ot001(1.0 mpp)99991ot0001(1

Cº1.0

YCARUCCA

F°86/C°02@

Hp1.0±

Hp10.0±

Hp200.0±

)Vm9.996±(Vm2.0±

)Vm0002±(Vm1±

.s.f%5.0±

Cº4.0±

)rorreeborpgnidulcxe(

egnartesffoVmleR Vm0002±

ecafretniretupmoC 232SRdetalosi-otpo

noitarbilaCHp

sreffub5,noitarbilactniop3ro2,1

baliava el

)10.01,81.9,10.7,68.6,10.4(

SPECIFICATIONS

noitarbilaCnoI

,noitarbilactniop-owtotpU

elbaliavasreffub5

)0001,001,01,1,1.0(

erutarepmeT

noitasnepmoc

:morfcitamotuArolaunaM

Cº0.021ot9.9–

edortcelEHp B1311IH

eborperutarepmeT W2/9667IH

ecnadepmitupnI 01

mho

ylppusrewoP retpadaCDV21

snoisnemiD )”9.2x1.7x4.9(mm47x281x042

thgieW

;)bl5.2(gK1.1

)bl5.5(gK5.2redlohhtiwtik

tnemnorivnE

)Fº221–23(Cº05–0

gnisnednocnon%59HRxam

ytnarraW sraey2

HI 253

SPECIFICATIONS (cont.)

OPERATIONAL GUIDE

CAL

CFM READY

1 2 3

BUF

WRONG

LOG mV pH

TIME% DATE INTV

BUFFER pH

ppm

POWER CONNECTION

Plug the 12 VDC adapter into the power supply socket.

Note: This instrument uses non volatile memory to retain the pH, mV,

temperature calibrations and all other settings, even when unplugged.

Note: Make sure a fuse protects the main line.

ELECTRODE 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.

INSTRUMENT START-UP

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

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

pH MEASUREMENTS

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

• Submerge the electrode tip and the temperature probe approximately 4 cm (1½”) into the sample 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

C C

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 submerge the

HI 7669/2W 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, simple manual compensation can be performed by disconnecting the temperature probe.

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

The temperature can now be adjusted with the ARROW keys (from –9.9 ºC to 120.0 ºC).

mV/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.

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

• Press RANGE 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 instrument displays the mV reading 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.

RELATIVE mV MEASUREMENTS

ppm

• Press RANGE until “rEL” message will be displayed on the secondary LCD line for about one second and “mV” tag will blink. After one second the temperature will be displayed on the secondary LCD.

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

ION MEASUREMENTS

• Press RANGE to enter ppm measurement mode.

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

TEMPERATURE MEASUREMENTS

Connect the HI 7669/2W temperature probe to the appropriate socket and turn the instrument on.

Immerse the temperature probe into the sample and allow the reading on the secondary LCD to stabilize.

pH CALIBRATION

BUF

CAL

BUFFER pH

BUF

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 week.

• 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 34).

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 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.

PROCEDURE

Calibration has a choice of 5 memorized buffers: pH 4.01, 6.86, 7.01, 9.18 and 10.01.

It is recommended to perform a two or three-point calibration. However, the instrument also allows one-point calibration, as described on page 12.

THREE-POINT CALIBRATION

• Immerse the pH electrode and the temperature probe approximately 4 cm (1½”) into a buffer solution of your choice (pH 4.01, 6.86, 7.01, 9.18 or 10.01) and stir gently. The temperature probe should be close to the pH electrode.

• Press CAL. The “CAL” and “

” tags will 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

CAL

BUF

BUFFER pH

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 will be displayed on the primary LCD and the second expected buffer value on the secondary LCD.

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

It also skips 6.86 if 7.01 buffer was used and viceversa. Likewise, it will skip 9.18 if 10.01 buffer was used and viceversa.

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

• Press CFM to confirm calibration.

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

Note: The instrument will automatically skip the buffers used for the first and

second calibration points.

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

• Press CFM to confirm calibration.

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

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

BUF

selected buffer, “WRONG” “

” and “WRONG” “ ” tags will blink alternately. In this case, check if the correct buffer has been used or regenerate the electrode by following the Cleaning Procedure (see page 34). If necessary, change the buffer or the electrode.

• If “WRONG”, “Buffer pH” tags and “Old” tag on the secondary LCD are displayed blinking, an inconsistency between new and previous (old) calibration is detected. Clear calibration parameters by pressing SET/CLR and proceed with calibration from the current calibration point (the instrument will keep all confirmed values during current calibration).

• The “WRONG” tag and temperature value are displayed blinking if temperature reading is out of the defined temperature range of the buffer. Calibration cannot be confirmed in this situation.

• Press RANGE to display the temperature reading on the LCD during calibration.

TWO-POINT CALIBRATION

• Proceed as described in “Three-point calibration” section.

• Press CAL after the second calibration point was confirmed.

The instrument will return to measurement mode and will memorize the two-point calibration data.

ONE-POINT CALIBRATION

• Proceed as described in “Three-point calibration” section.

• Press CAL after the first calibration point was confirmed.

The instrument will return to measurement mode and will memorize the one-point calibration data.

Note: Calibration parameters are evaluated taking in consideration the new

values for the confirmed buffers in current calibration and the old values, if existing, for the other buffers. To clear old calibration values, press SET/CLR before exiting calibration.

ION CALIBRATION

BUF

CAL

BUF

ppm

CAL

BUF

ppm

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 buffer.

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

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

PROCEDURE

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

Select Ion measurement range by pressing RANGE. Remove the protective cap from the ISE electrode.

TWO-POINT CALIBRATION

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

• Press CAL. The primary LCD will display the ppm value using the current offset and slope. The “CAL” and “

” tags will appear and 0.1 ppm 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 will be displayed on the primary LCD and the second expected buffer value on the secondary LCD.

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

BUF

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

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

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

and “WRONG” “ ” tags will blink alternately. In this case, check if the correct buffer has been used or refresh the electrode by following the Cleaning Procedure (see page 34). If necessary, change the buffer or the electrode.

• If the new slope is out of the slope window, “WRONG” “

” and

“WRONG” “ ” tags will blink alternately. In this case, check if the correct buffer has been used or refresh the electrode by following the Cleaning Procedure. If necessary, change the buffer or the electrode.

Slope window is between ±20 mV and ±105 mV if ion charge is not specified (undF option 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 SET/CLR during calibration if you want to clear calibration values and set to default. The instrument will display “CLR” message and will return to measurement mode.

• Press RANGE to display the temperature reading on the LCD during calibration.

ONE-POINT CALIBRATION

• Press CAL after first calibration point was confirmed. The instrument memorizes the one-point calibration parameters and returns to measurement mode.

”

GOOD LABORATORY PRACTICE (GLP)

TIME

CAL

DATE

CAL

CAL mV

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

All data regarding last pH calibration (one, two or three-point) and Ion calibration is stored for the user to review when necessary. This data includes the following: calibration time stamp, offset (mV), average of pH slope (%) or Ion slope (mV), calibration buffers and the time until a new calibration is required (only for pH calibration).

CALIBRATION ALARM TIME-OUT

For pH calibration, HI 253 allows the user to set the number of days before the next required calibration. This value can be set from 1 to 7 days. The default setting is OFF (disabled).

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

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

displayed even if the feature is disabled in SETUP menu.

LAST pH CALIBRATION DATA

Last pH calibration data is stored automatically after a successful calibration. To view the pH calibration data, press GLP while in normal measurement

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

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

• The date (yyyy.mm.dd).

• The pH calibration offset.

• The pH calibration slope (the GLP slope is the average of the calibration

CAL pH

BUF

CAL pH

BUF

CAL

BUF

CAL

CAL pH

BUF

slopes; the percentage is referred to the ideal value of 59.16 mV/pH).

• The pH calibration buffers in calibrating order. The first pH calibration buffer:

The second pH calibration buffer:

The third pH calibration buffer:

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

this buffer was not used during last calibration. Press and hold down SET/CLR if you want to see calibration date (or time if old calibration was made in the same day with current calibration).

• If “no bUF” message appears on the LCD, the instruments inform you that calibration was performed in less than three points.

• pH resolution during calibration.

• Calibration Alarm Time-Out status: if disabled.

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

CAL

INTV

TIME

CAL

DATE

CAL

BUF

ppm

CAL

BUF

CAL

BUF

ppm

or if expired (7 days ago).

• The instrument ID.

LAST ION CALIBRATION DATA

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

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

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

• The date (yyyy.mm.dd).

• The first Ion calibration buffer.

• The first mV value.

• The second Ion calibration buffer.

LOG

CAL

• The second mV value.

CAL

BUF

CAL mV

• The Ion calibration slope (mV/decade).

• The instrument ID.

Note: • 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.

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

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

LOGGING FUNCTION

Up to 50 LOG samples can be stored into memory.

LOGGING THE CURRENT DATA

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

The instrument will display the current date (mm.dd) on the primary LCD, the record number on the secondary LCD and “LOG” tag will blink for a few seconds (see example below: record No. 5 dated September 14):

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

If the log space is full, “FULL LOC” message will be displayed and no more

LOG

LOG pH

LOG mV

LOG

mVLOG

ppm

LOG

data will be saved.

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

VIEW LOGGED DATA

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

Otherwise, the instrument will display the pH, relative mV or ppm value on the primary LCD and the last stored record number on the secondary LCD, along with “LOG” tag.

Pressing the ARROW keys, the instrument will display the same parameter but for a different record:

Press RANGE and the instrument will display the next logged parameter as follows:

• The mV value on the primary LCD and the record number on the secondary LCD.

LOG

DATE

LOG mV

• The temperature value on the primary LCD and the record number on

LOG

TIME

LOG

LOG mV

the secondary LCD.

Note: When the pH, mV or temperature is displayed, if SET/CLR is pressed

and hold down, the secondary LCD will display the record date.

• The time on the primary LCD, along with “TIME” tag.

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

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

Note: If in Ion RECALL mode, the instrument will display “----” message on

the primary LCD.

• The calibration slope (for pH or ppm range) on the primary LCD and “SLP” message on the secondary LCD.

Note: • If in Relative mV RECALL mode, the instrument will display “----”

message on the primary LCD.

• When the time, date, year, offset or slope is displayed, if SET/CLR is pressed and hold down, the secondary LCD will display the record number.

LOG

• The “dEL” message on the primary LCD and the selected record on the

LOG

secondary LCD, along with ”LOG” tag.

Note: • If one of the ARROW keys is pressed while “dEL” and record

number is displayed, the next/previous record number is selected.

• If LOG is pressed, the secondary LCD will display “ALL” message.

• Pressing LOG again, the secondary LCD will display the record number.

• Press SET/CLR to delete the selected or all records.

• If “del ALL” option was selected, all records are deleted and the instrument returns to measurement mode.

Note: After LOG is pressed while in measurement mode or a selected record is

deleted, the instrument will display the amount of free log space for about one second (e.g. 25 records free).

Press RCL to leave RECALL mode at any time.

SETUP

TIME

Setup mode allows viewing and modifying the following parameters:

• Current Time

• Current Date

• pH Resolution

• Ion Charge

• Beep Status

• Baud Rate (serial communication)

• Command prefix (serial communication)

• Calibration Alarm Time-Out

• Instrument ID To enter SETUP mode press SET while the instrument is in measurement mode. Select a parameter with the ARROW keys. Press CAL if you want 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. Press the ARROW keys to select the next/previous parameter.

CURRENT TIME SET

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

Press the ARROW keys to change the hour. 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.

CURRENT DATE SET

DATE

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

Press the ARROW keys to change the year. Press RANGE. The month will start blinking.

Press the ARROW keys to change the month. 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.

pH RESOLUTION SET

Press CAL when the pH range is displayed. The pH range (0.1, 0.01 or

0.001) will start blinking.

Press the ARROW keys to change the pH range. Press CFM to save the modified pH range. Press CAL to escape without saving.

ION CHARGE

Press CAL when the ion charge is displayed. The ion charge (undF, –2, –1, 1 or 2) will start blinking.

Press the ARROW keys to change the ion charge.

EGRAHCNOI sepytNOI

2– )snoinatnelavid( OC,S

1– )snoinatnelavonom( OlC,NCS,NC,I,rB,lC,F

ON,

1 )snoitactnelavonom( HN,gA,K,aN

2 )snoitactnelavid( bP,uC,dC,aB,aC,gM

Fdnu noidenifednu

Note: To select the right ion charge, different ion types and their charge are

presented in the table below.

Press CFM to save the modified ion charge. Press CAL to escape without saving.

BEEP STATUS SET

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

Press the ARROW keys to change the beep status (On or OFF). Press CFM to save the modified beep status. Press CAL to escape without saving.

BAUD RATE SET

Press CAL when the baud rate is displayed. The baud rate (600, 1200, 2400, 4800 or 9600) will start blinking.

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

CAL

INTV

SERIAL COMMUNICATION COMMAND PREFIX SET

Press CAL when the command prefix is displayed. The command prefix (0 to

47) will start blinking.

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

Note: • See the PC interface section on page 29 for a complete explanation.

• The command prefix must be 16 if HI 92000 PC software is used.

CALIBRATION ALARM TIME-OUT SET

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

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

INSTRUMENT ID PARAMETER SET

Press CAL when the instrument ID is displayed. The instrument ID (0000 to

9999) will start blinking.

Press the ARROW keys to change the instrument ID value. 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 CALIBRATION

CAL

(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 bellow.

• Prepare a vessel containing ice and water and another one containing hot water (at a temperature of 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.

• With the instrument off, press and hold down the CAL&LOG keys, then power on the instrument. The “CAL” tag will appear and the secondary LCD will show 0.0 ºC.

• Immerse the temperature probe in the vessel with ice and water as near 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, “READY” tag will appear and “CFM” tag will blink.

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

• Immerse the temperature probe in the second vessel as near 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

C C

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 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.

mV CALIBRATION

(for 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 or three-point calibration can be performed at 0.0 mV, 600.0 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 CFM&RCL 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 600 mV.

• Set 600.0 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 returns to measurement mode.

Note: • 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.

RELATIVE mV CALIBRATION

• Press CAL when the instrument is in RELATIVE mV measurement mode. The “mV” and “ ” tags will blink. 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 relative mV offset is displayed on the primary LCD and “OFF” message on the secondary LCD for a few seconds. The instrument returns to measurement mode.

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

window (± 2000 mV).

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 into the serial port of your PC.

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

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

• If 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. <command> is the command code (3 characters).

Note: Either small or capital letters can be used.

SIMPLE COMMANDS

RNG Is equivalent to pressing RANGE CAL Is equivalent to pressing CAL CFM Is equivalent to pressing CFM/GLP UPC Is equivalent to pressing the UP arrow key DWC Is equivalent to pressing the DOWN arrow key SET Is equivalent to pressing SET/CLR LOG Is equivalent to pressing LOG

CHR n Change the instrument range according with the parameter

value (n):

• n=0 pH range/0.001 resolution

• n=1 pH range/0.01 resolution

• n=2 pH range/0.1 resolution

• n=3 mV range

• n=4 Relative mV range

• n=5 Ion range

COMMANDS REQUIRING AN ANSWER

pH? Causes the instrument to send the pH reading. If the range is set

to mV, “Err6” is received.

MV? Causes the instrument to send the mV reading. If the range is set

to pH, “Err6” is received.

MR? Causes the instrument to send the relative mV reading. If the

range is set to pH or mV, “Err6” is received.

TM? Causes the instrument to send the temperature reading. pM? Causes the instrument to send the Ion reading. “Err6” is received

if the instrument is not in Ion range.

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.

• ppm, mV and temperature reading on Ion range.

MDR Requests the instrument model name and firmware code. PAR Requests the setup parameters setting (instrument ID, calibra-

tion alarm time-out, pH range, beep status).

NSL Requests the number of logged samples. GLP Requests the calibration data record. LOD xxx Requests the xxxth record logged data (“Err3” is sent when “xxx”

is an invalid record number).

LOD ALL Requests all logged data. Note: • “Err8” is sent if instrument is not in measurement mode.

• “Err7” is sent if mV are asked during pH calibration mode.

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

pH VALUES AT DIFFERENT

PMET SEULAVHp

Cº Fº 10.4 68.6 10.7 81.9 10.01

0 23 10.4 89.6 31.7 64.9 23.01

5 14 00.4 59.6 01.7 93.9 42.01

01 05 00.4 29.6 70.7 33.9 81.01

51 95 00.4 09.6 40.7 72.9 21.01

02 86 00.4 88.6 30.7 22.9 60.01

52 77 10.4 68.6 10.7 81.9 10.01

03 68 20.4 58.6 00.7 41.9 69.9

53 59 30.4 48.6 99.6 01.9 29.9

04 401 40.4 48.6 89.6 70.9 89.9

54 311 50.4 38.6 89.6 40.9 58.9

05 221 60.4 38.6 89.6 10.9 28.9

55 131 70.4 48.6 89.6 99.8 97.9

06 041 90.4 48.6 89.6 79.8 77.9

56 941 11.4 58.6 99.6 59.8 67.9

07 851 21.4 58.6 99.6 39.8 57.9

TEMPERATURES

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.

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

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 is run down and the electrode should be replaced.

MEASUREMENT

Rinse the electrode tip with distilled water. Immerse the tip (bottom 4 cm /1½”) in the sample and stir gently for a few seconds.

For a faster response and to avoid cross-contamination of the samples, rinse the electrode tip with a few drops of the solution to be tested, before taking measurements.

STORAGE PROCEDURE

To minimize clogging and assure a quick response time, the glass bulb and the junction 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 32 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.

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.

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.

TROUBLESHOOTING GUIDE

SMOTPMYS MELBORP NOITULOS

evissecxe/esnoperwolS

.tfird

.edortceleHpytriD nipitedortceleehtkaoS

1608IHro1607IH

setunim03rofnoitulos

ehtnaelcnehtdna

.edortcele

puetautculfsgnidaeR

.)esion(nwoddna

.noitcnujytrid/deggolC

leveletylortcelewoL

sedortceleelballifer(

.)ylno

.edortceleehtnaelC

noituloshserfhtiwllifeR

sedortceleelballiferrof(

.)ylno

ehtniegnarfotuO

.elacsVm

yrD

.noitcnuj/enarbmem

ro00307IHnikaoS

egarots00308IH

.noitulos

tonseodretemehT

reffubehttpecca rofnoitulos .noitarbilac

HpredrofotuO

.edortcele

gninaelcehtwolloF

onllitsfI.erudecorp

ehtecalper,stluser

.edortcele

:swohsyalpsidehtfI

ro"00.2-"dna"Hp"

.gniknilb"00.61"

HpehtniegnarfotuO

.elacs

.retemehtetarbilaceR)a

HpehterusekaM)b

deificepsehtnisielpmas

.egnar

etylortceleehtkcehC)c

larenegehtdnalevel

.edortceleehtfoetats

:swohsyalpsidehtfI

ro"0002-"dna"Vm"

gniknilb"0002+"

ehtniegnarfotuO

.elacsVm

.detcennoctonedortcelE

tonseodretemehT

ehthtiwkrow

.eborperutarepmet

erutarepmetnekorB

.eborp

erutarepmetehtecalpeR

.eborp

otsliafretemehT

sevigroetarbilac

.sgnidaerytluaf

.edortceleHpnekorB .edortceleehtecalpeR

retemehtputratstA

sgatDCLllasyalpsid

.yltnenamrep

sisyekehtfoenO

.dekcolb

rodraobyekehtkcehC

.rodnevehttcatnoc

egassemrorre"xxrrE"

.deyalpsid

.rorrelanretnI dnaretemehtfforewoP

ehtfI.notirewopneht

ehttcatnoc,stsisreprorre

.rodnev

TEMPERATURE CORRELATION

FOR pH SENSITIVE GLASS

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

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

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

ACCESSORIES

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 7001L pH 1.68 Buffer Solution in FDA approved bottle, 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

ELECTRODE STORAGE SOLUTIONS

HI 70300L Storage Solution, 460 mL HI 80300L Storage Solution in FDA approved bottle, 460 mL

ELECTRODE CLEANING SOLUTIONS

HI 70000P Electrode Rinse Sachets, 20 mL, 25 pcs HI 7061L General Cleaning Solution, 460 mL HI 7073L Protein Cleaning Solution, 460 mL HI 7074L Inorganic Cleaning Solution, 460 mL HI 7077L Oil & Fat Cleaning Solution, 460 mL HI 8061L General Cleaning Solution in FDA approved bottle, 460 mL HI 8073L Protein Cleaning Solution in FDA approved bottle, 460 mL HI 8077L Oil & Fat Cleaning Solution in FDA approved bottle, 460 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.

ORP PRETREATMENT SOLUTIONS

120 mm

4.7"

12 mm

0.5"

9.5mm DIA

0.37"

"S" VERSION

HI 1043

120 mm

4.7"

12 mm

0.5"

"S" VERSION

HI 1053

120 mm

12 mm

0.5"

5 mm

0.2"

3 mm

0.12"

3.0 mm DIA

0.12"

HI 1083

120 mm

4.7"

12 mm

0.5"

9.5mm DIA

0.37"

"S" VERSION

HI 1131

HI 7091L Reducing Pretreatment Solution, 460 mL HI 7092L Oxidizing Pretreatment Solution, 460 mL

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

120 mm

4.7"

5mm

0.2"

5mm DIA

0.2"

"S" VERSION

HI 1330

120 mm

4.7"

12 mm

0.5"

HI 1230

75 mm

2.95"

6 mm

0.25"

HI 2031

120 mm

4.7"

12 mm

0.5"

"S" VERSION

HI 1332

210 mm

8.25"

8 mm

0.3"

7.5mm DIA

0.29"

"S" VERSION

HI 1331

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 (Ultem®), 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 (Ultem®), double junction, refillable, combination pH electrode. Use: general purpose.

120 mm

4.7"

12 mm

0.5"

FC 100

75 mm

2.95"

6 mm

0.25"

FC 200

120 mm

4.7"

12 mm

0.5"

FC 210

120 mm

4.7"

12 mm

0.5"

9.5mm DIA

0.37"

FC 220

110 mm

4.3"

12 mm

0.5"

FC 911

FC 100B

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

FC 200B

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

HI 1413B

110 mm

4.3"

12 mm

0.5"

HI 1413

150 mm

5.9"

12 mm

0.5"

"S" VERSION

HI 3131

120 mm

4.7"

12 mm

0.5"

HI 3230

"S" VERSION

120 mm

4.7"

12 mm

0.5"

HI 4430

"S" VERSION

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 (Ultem®), gel-filled, combination platinum ORP electrode. Use: general purpose.

HI 4430B

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

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

Ultem® is registered Trademark of “General Electric Co.” Kynar® is registered Trademark of “Pennwalt Corp.”

EXTENSION CABLE FOR SCREW-TYPE ELECTRODES

CONNECT TO SCREW TYPE ELECTRODES

CONNECT TO THE

BNC SOCKET

OF THE METER

HI 7855 SERIES CABLE CONNECTORS

CONNECTOR AND 3.0 mm (0.12") CABLE WITH BNC

(SCREW TO BNC ADAPTER)

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

OTHER ACCESSORIES

HI 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)

HI 76405 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 7669/2W Temperature probe with 1 m (3.3') cable HI 92000 Windows® compatible software HI 920010 9 to 9-pin RS232 cable

RECOMMENDATIONS FOR USERS

Before using 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.

SALES AND TECHNICAL SERVICE CONTACTS

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

05/05

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.

MAN253

Hanna Instruments HI 253 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual