Hanna Instruments HI 9017 User Manual

Instruction Manual

HI9017 - HI9218 HI9219 - HI9318

Microprocessor

Bench-top

pH Meters with

RS232C

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http://www.hannainst.com

These Instruments are in

Compliance with the CE Directives

Dear Customer, Thank you for choosing a Hanna Instruments Product. Please read this instruction manual carefully before using the instru-

ment. This manual will provide you with all the necessary information for the

correct use of the instrument, as well as a precise idea of its versatility in a wide range of applications.

These instruments are in compliance with CSA, UL and directives (EN 50081-1 and EN50082-1).

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

TABLE OF CONTENTSTABLE OF CONTENTS

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

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

FRONT PANEL AND SPECIFICATIONS:

HI9017 ................................................................................... 5

HI9218 & HI9219 ................................................................................. 7

HI9318 ................................................................................... 9

REAR PANEL CONNECTIONS .................................................................. 11

OPERATIONAL GUIDE ............................................................................ 13

PH CALIBRATION ................................................................................. 18

PH VALUES AT VARIOUS TEMPERATURE ................................................. 26

TEMPERATURE CALIBRATION ................................................................. 26

HOW TO SET DATE & TIME (HI9218 & HI9219) .................................... 27

PROGRAMS OF HI9017 ......................................................................... 28

PROGRAMMING LOGGER FUNCTIONS HI9318 ........................................ 37

TROUBLESHOOTING GUIDE ................................................................... 45

INTERFACE WITH COMPUTER ................................................................. 46

ELECTRODE CONDITIONING AND MAINTENANCE ..................................... 50

TEMPERATURE-RESISTANCE CORRELATION FOR

HANNA PH SENSITIVE GLASS ................................................................ 53

ACCESSORIES ................................................................................. 54

ELECTRODE APPLICATION REFERENCE GUIDE .......................................... 61

WARRANTY ................................................................................. 62

CE CERTIFICATE OF CONFORMITY ........................................................... 63

ISO 9000 Certified Company since 1992

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

PRELIMINARY EXAMINATION

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it to make sure that no damage has occurred during shipping. If there is any damage, notify your Dealer.

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

HI9017, HI9218, HI9219 and HI9318 are microprocessor-based benchtop meters designed to meet the most stringent demands of the laboratory.

They feature:

•user friendly rubber keyboard

•automatic calibration with memorized buffers values

•automatic or manual temperature compensation

•storage of calibration data even after the meters are shut off

•error codes to guide the user in calibration and troubleshooting All these models incorporate a standard RS232C output for communication with a computer. The HI76405 electrode holder provided will hold your pH electrode and temperature probe directly over the sample vessel which can be placed on the enamel coated base of the holder. A magnetic stirrer can also be placed on the enamel coated base if sample agitation is required. The enamel coating is impervious to most chemicals and the heavy steel base will not tip over easily. These meters are perfect for use in Q.C. labs, R&D labs, environmental testing, industrial processing, chemical treatment, waste water treatment, drinking water analysis, titration, hydroponics, general agriculture, food processing and anywhere accurate pH measurements are required.

• HI9017 pH/mV/°C meter automatically recognizes three stan-

dard calibration buffer values (pH 4.01, 7.01, 10.01). The pH and temperature values are shown separately on the LCDs. A wide mV range and high resolution allow for ORP or ion-selective measurements (the range automatically switches from ISE to ORP when readings exceed ±399.9 mV).

HI9017 comes supplied with HI1131B glass-body combination pH electrode (with 1m/3.3' cable), HI7669/2W temperature probe

(with 1m/3.3' cable), 12VDC adapter (HI710005 or HI710006), pH 4.01 & pH 7.01 buffer solutions (20 mL each), HI7071 electrolyte solution (30 mL), HI76405 electrode holder and a dust cover.

• HI9218 and HI9219 are programmable pH/°C meter with built-

in printer. They print pH values together with temperature, time and date. These meter provide you with pH and temperature readings simultaneously and separately on the LCDs and feature a unique stability indicator. When the pH electrode stabilizes in the sample, the "NO" on the LCD changes to "YES". This indicates that the reading is correct and can be recorded. They automatically recognize three standard buffers (4.01, 7.01 and 10.01 pH) for calibration purposes. These meters are extremely user-friendly, giving step-by-step instructions on the printer at every stage to help the user.

HI9218 has been specifically designed for the food industry. HI9218 comes supplied with FC100B plastic-body combination

pH electrode (with 1m/3.3' cable) while HI9219 comes with HI1131B glass-body combination pH electrode (with 1m/3.3'

cable). HI9218 and HI9219 are also supplied with: HI7669/2W temperature probe (with 1m/3.3' cable), 12VDC adapter (HI710005 or HI710006), pH 4.01 & pH 7.01 buffer solutions (20 mL each), HI7071 electrolyte solution (30 mL), 5 replacement rolls of printer paper, HI76405 electrode holder and a dust cover.

• HI9318 is a pH/mV/°C meter designed for logging data in various

applications. This programmable printing meter prints pH or mV values as well as sample number, temperature, time and date. The pH/mV and temperature values are displayed on separate LCDs for ease of reading. It recognizes and memorizes three different standard buffers (pH 4.01, 7.01 and 10.01) for calibration purposes. The printer can be programmed to print in one of 6 different languages (English, French, German, Italian, Spanish or Swedish). Once your language is selected you can simply prompt the meter to calibrate and it will print step-by-step instructions through the entire process making this meter perfect for use by even non-technical staff members.

HI9318 comes supplied with HI1131B glass-body combination pH electrode (with 1m/3.3' cable), HI7669/2W temperature probe (with 1m/3.3' cable), 12VDC adapter (HI710005 or HI710006), pH 4.01 & pH 7.01 buffer solutions (20 mL each), HI7071 electrolyte solution (30 mL), 5 replacement rolls of printer paper, HI76405 electrode holder and a dust cover.

FRONT PANEL ANDFRONT PANEL AND

FRONT PANEL AND

FRONT PANEL ANDFRONT PANEL AND

SPECIFICATIONS OF HSPECIFICATIONS OF H

SPECIFICATIONS OF H

SPECIFICATIONS OF HSPECIFICATIONS OF H

90179017

9017

90179017

to manually enter calibration buffervalue

PGM

to enter pH alarm

PGM

to enter mV alarm

PGM

to enter temperature alarm

PGM

to enter pH end point alarm

PGM

to enter RS 232 ESC code

PGM

to exit from any program

PGM

to clear entry or silence alarm

CLEAR

Standard pH buffer - 4.01, 7.01, 10.01

1. Program descriptions

Briefly describes the 6 programs

2. Temperature LCD This LCD displays the temperature measured by the HI7669/2W

probe or the value that was manually set through the keyboard. If the temperature has been set manually, the "°C" symbol will

flash. When the temperature probe is connected the measured tempera-

ture is displayed and the "°C" symbol stops flashing. When the temperature measured by the probe is out of range (-10

to 125°C) the "Err3" signal appears.

3. pH and mV LCD This LCD displays the pH or mV reading (pH and mV is toggled

with the RANGE key). The corresponding pH or mV symbol will be displayed along with the measured value.

An error signal ("Err1", "Err2", "Err4" or "Err5") will appear on this display to indicate that the range is exceeded or that the buffer used for calibration is not recognized by the meter's microprocessor.

4. Keyboard

ENTER A key used in programming. ENTER B key used in programming. CLEAR key to clear entry or silence alarm. PGM key to select a program.

PROGRAMS

ENTER ENTER

1st buffer 2nd buffer

ENTER ENTER

upper limit lower limit

ENTER ENTER

upper limit lower limit

ENTER ENTER

upper limit lower limit

ENTER ENTER

end point value alert value

ENTER

ESC code

ENTERAENTERBCLEAR

pH°C

HI 9017 MICROPROCESSOR pH METER

ins rum n

CAL

PGM

+/-

OFF

RANGE

CON

TEMP

ON key to switch the instrument on. OFF key to switch the instrument off. RANGE key to switch range from pH to mV or vice versa. CAL key used in calibration with standard pH buffers (pH

4.01, 7.01, 10.01)

CON key confirmation of calibration data +/- key entering negative values TEMP key used for manual temperature adjustment 0 to 9 keys numeric and Decimal keys for numeric data input

SPECIFICATIONS HI 9017 Range pH 0.00 to 14.00

ISE ± 399.9 mV

ORP ±1999 mV

°C -10.0 to 125.0

Resolution pH 0.01

ISE 0.1 mV

ORP 1 mV

°C 0.1 Accuracy pH ±0.01 (@ 20°C/68°F) ISE ±0.2 mV

ORP ±1 mV

°C ±0.5 Typical EMC pH ±0.02 Deviation ISE ±0.2 mV

ORP ±1 mV

°C ±0.5 Calibration 2 point with automatic recognition of 3

buffers (pH 4.01, 7.01, 10.01)

Temperature -10° to +125°C (14 to 257 °F) completely

automatic with HI7669/2W temperature

probe; manual by means of keyboard Comp. Interface RS232C Electrode HI1131B Glass body combination

pH electrode (included) Temperature Probe HI7669/2W Temperature probe (included) Input Impedance 1012 Ohm Power Power socket for 12VDC Environment 0 to 50°C (32 to 122°F); RH 95% Dimensions 230 x 170 x 70mm (9.1 x 6.7 x 2.7") Weight 1.3 Kg (2.9 lb.); kit w/holder 3.2 Kg (7 lb.)

FRONT PANEL ANDFRONT PANEL AND

FRONT PANEL AND

FRONT PANEL ANDFRONT PANEL AND

SPECIFICATIONS OF HI9218 & HI9219SPECIFICATIONS OF HI9218 & HI9219

SPECIFICATIONS OF HI9218 & HI9219

SPECIFICATIONS OF HI9218 & HI9219SPECIFICATIONS OF HI9218 & HI9219

Foodcare

To change paper roll or ink ribbon

Slide cover to the left to open.

Push ribbon cassette as marked - to release

Insert new paper roll. Pass leading end under guide plate and press PAPER to feed paper through the printer.

Pass leading end through ribbon cassette, with ribbon at the front and press cassette into position

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PAPER

STABILITY INDICATOR

READY

YES

HI 9218

PRITING pH METER WITH STABILITY INDICATOR

°C

Press to check reading stability.

Wait

Reading is stable. Press to obtain

a copy.

DATE

CAL

1. Printer

Plain paper printer

2. Temperature LCD This LCD displays the temperature measured by the HI7669/2W

probe or the value that was manually set through the keyboard. If the temperature has been set manually, the "°C" symbol will flash. When the temperature probe is connected the measured temperature is displayed and the "°C" symbol stops flashing. When the temperature measured by the probe is out of range (-

10.0 to 125.0°C) the "Err3" signal appears.

3. pH LCD This LCD displays the pH reading. The corresponding pH symbol

will be displayed along with the measured value. An error signal ("Err1", "Err4" or "Err5") will appear on this display to indicate that the range is exceeded or that the buffer used for calibration is not recognized.

4. Small LCD This LCD normally displays the time. When the DATE button is

pressed, the date will be displayed. When the READY key is pressed, the display shows "NO" while the electrode is stabilizing and "YES" once the reading is stable.

5. Keyboard

ON/OFF key to switch the instrument "ON" or "OFF". Note: Press OFF before unplugging instrument, otherwise, calibration

data and time setting could be lost.

OFF

TIME

CFM

DOWN

DATE/TIME key to display date and time. CAL key to enter calibration mode. CFM key to confirm memorized buffers 7.01 and 4.01/10.01. UP/DOWN key to set manual temperature compensation and date/time. PAPER key manual paper feed control. PRINT key prints pH value together with temperature, date

and time.

READY key stability indicator to ensure correct pH reading or

to enable calibration.

SPECIFICATIONS HI9218 HI9219 Ranges pH 0.00 to 14.00

°C -10.0 to 125.0

Resolution pH 0.01

°C 0.1 Accuracy pH ±0.01 (@20°C/68°F) °C ±0.5 Typical EMC pH ±0.04 Deviation °C ±1.5 Calibration 2 point with automatic recognition of

3 buffers (pH 4.01, 7.01, 10.01)

Temperature -10° to 125°C (14 to 257°F) Completely Compensation automatic with HI 7669/2W temperature

probe; manual by means of keyboard Comp. Interface RS232C Electrode HI9218: FC100B plastic body combination

pH electrode (included)

HI9219:HI1131B Glass body combination

pH electrode (included) Temperature HI7669/2W Temperature probe (included) Probe Input Impedance 1012 Ohm Display 2 large 4-digit LCD for pH and temperature

with symbols 1 small LCD for date/time and

stability indicator Printer 1 x 16 line dot matrix printer,

paper width: 44 mm,

roll diameter: 35 mm

Power Supply Power socket for 12VDC Environment 0 to 50°C (32 to 122°F); RH 95% Dimensions 230x170x70mm (9.1x6.7x2.7") Weight 1.3 Kg (2.9 lb.);

kit w/holder 3.2 Kg (7 lb.)

FRONT PANEL ANDFRONT PANEL AND

FRONT PANEL AND

FRONT PANEL ANDFRONT PANEL AND

PROGRAMS

0 PGM to exit from any program

1 PGM to set sampling number, time and date 2 PGM to manually enter calibration buffervalue 3 PGM to print calibration data 4 PGM to print sample data until specified time 5 PGM to print sample data until end point 6 PGM to set pH/mV alarm 7 PGM to select different working language 8 PGM to print ion concentration 9 PGM to enter RS232C ESC code CLEAR to clear entry

SPECIFICATIONS OF HSPECIFICATIONS OF H

SPECIFICATIONS OF H

SPECIFICATIONS OF HSPECIFICATIONS OF H

°C

PAPER

PRINT CLEAR

ABC

789

456

423

+/- .

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PGM

93189318

9318

93189318

SAMPLE DATE

DATE RANGE

CAL

+/-

1. Program descriptions Briefly describes the 9 programs

2. Printer Plain paper printer

3. Temperature LCD This LCD displays the temperature. If

the temperature has been set manually, the "°C" symbol will flash. When the temperature probe is connected the measured temperature is displayed and the "°C" symbol stops flashing. When the temperature measured by the probe is out of range (-10 to 125°C) the "Err3" signal appears.

4. pH and mV LCD This LCD displays the pH or mV reading

(pH and mV is toggled with the RANGE key). The corresponding pH or mV symbol will be displayed along with the measured value. An error signal ("Err1", "Err2", "Err4" or "Err5") will appear on this display to indicate that the range is exceeded or that the buffer used for calibration is not recognized.

5. Sample LCD Displays the sample number of the current lot.

6. Time and Date LCD Displays the Time as HH.MM. and the

date as MM.DD. This LCD also displays any numeric data entered from the keyboard to show the user the entered values.

7. Keyboard PAPER key manual paper feed control. Press and hold this button

and the printer will advance the paper roll

PRINT key prints the time, date, sample #, and pH/mV values CLEAR key cancels wrong data entered during programming ON key to switch the instrument on OFF key to switch the instrument off. DATE key allows to display the month and day or time in hours

and minutes

5 6

OFF

CON

TEMP.

RANGE key selects pH or mV readings to be displayed on the right LCD CAL key to enter into the calibration mode CON key for confirmation of buffer value during calibration + / - key select + or - value for manual temperature compensation TEMP key allows to select temperature manually when the

temperature probe is not connected

PGM key selects any of the 9 available programs 0 to 9 keys numeric and Decimal keys for numeric data input

SPECIFICATIONS HI9318 Ranges pH 0.00 to 14.00

ISE 0 to ±399.9 mV

ORP 0 to ±1999 mV

°C -10.0 to 125.0

Resolution pH 0.01

ISE 0.1mV

ORP 1 mV

°C 0.1 Accuracy pH ±0.01 (@20°C/68°F) ISE ±0.2 mV

ORP ±1 mV

°C ±0.5 Typical EMC pH ±0.04 Deviation ISE ±2.5 mV

ORP ±3 mV

°C ±1.5 Calibration Automatic at pH 4, 7, 10 or at any two

buffer values with program 2

Offset ±1pH Slope From 85 to 105% Input Impedance 1012 Ohm Temperature -10° to 125°C (14 to 257°F) completely

Compensation automatic with HI 7669/2W temp. probe;

manual by means of keyboard

Display 2 large 4 digit LCDs for pH/mV and

Temperature with symbols and one LCD for date/time and sample #

Printer Dot matrix, 44mm wide paper Power Supply Power socket for 12VDC

Languages English, German, French,

Spanish, Italian & Swedish

Electrode HI1131B Glass body combination

pH electrode (included)

Temperature Probe HI7669/2W Temperature probe (included) Environment 0 to 50°C (32 to 122°F); RH 95%

Dimensions 230 x 170 x 70mm (9.1 x 6.7 x 2.7") Weight 1.3kg (2.9 lb.); Kit: 3.4 Kg (7.4lb.)

REAR PANEL CONNECTIONSREAR PANEL CONNECTIONS

REAR PANEL CONNECTIONS

REAR PANEL CONNECTIONSREAR PANEL CONNECTIONS

DTR

TXD

GND

COMBINATION

REFERENCE

ELECTRODE

TEMPERATURE

PROBE

RESET

123 4 5 6 7

RXD

ooooo

oooo

DSR

RS-232

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oooo

1) BNC male connector for single or combination electrode. Will accept any pH or ORP electrode with a standard BNC connector.

2) Jack bush connector for reference electrode

3) Banana bush connector for reference electrode When the electrode attached to the BNC does not have a refer-

ence, connect the reference to one of these sockets (2 choices for different diameters).

4) Temperature probe socket for use with the HI7669/2W.

5) Reset button.

6) RS 232C socket for serial communication.

7) DC Power Socket (for HI710005 or HI710006).

Electrode and probe connections

For combination pH (or ORP for HI9017 and HI9318) electrodes (with internal reference) plug the electrode's BNC to the socket provided (#1).

For electrode with separate reference (see page 58), connect the measuring electrode's BNC to the BNC socket (#1) and the reference electrode's jack to the socket provided (#2 or #3).

For temperature measurements and automatic temperature compensation connect the temperature probe to the °C socket (#4).

RESET button

The RESET button (#5) is used when the instrument displays erroneous messages due to strong electrical interference or when the instrument's power supply was disconnected before the meter was switched off. Press the RESET button and restart the entire operation.

Power connection

Plug the 12VDC adapter (HI710005 or HI710006) into the DC socket (#7).

Plug the adapter into the mains. Note: The instrument uses the following configuration.

It is recommendable to use the Hanna HI7710005 or HI710006 voltage adapters (supplied witht the meters) that use the proper polarity configuration.

The meters can also be used with other adapters. In this case, remember to check the correct polarity of your adapter before connecting it to the meter.

Note: Make sure the main line is protected by a fuse. Note: HI9017, HI9218, HI9219, HI9318 use a rechargeable battery

to retain the pH calibration data only. It lasts approximately one month when fully charged. The battery is automatically charged any time the meter is plugged-in (either turned on or off).

Notes:

1) If you need to unplug the instrument, press the OFF key before

disconnecting the meter from the mains. Only in this case will the instrument retain the memorized data. Otherwise, the instrument needs to be re-calibrated. In the case of a power failure while the instrument is operational , re-calibration is required.

2) When the instrument is initially switched on, the microprocessor

checks if any calibration data is in memory (i.e. if the offset is within ±1 pH and the slope between 70 - 105%). If the calibration data are not memorized, the offset and slope of the instrument will be set to 0 mV and 100% respectively.

OPERATIONAL GUIDEOPERATIONAL GUIDE

OPERATIONAL GUIDE

OPERATIONAL GUIDEOPERATIONAL GUIDE

TAKING PH MEASUREMENTS

Make sure that the instrument has been calibrated for pH before taking pH measurements (see page 18).

Connect the pH electrode (combination-type) or the electrode half cells to the appropriate connectors on the rear panel (see page 11).

If automatic temperature compensation is required, connect the HI7669/2W temperature probe to the proper socket on the rear panel (see page 11).

Press the ON key to turn the meter on. The meter will automatically default to the pH measurement mode.

Immerse the electrode and the temperature probe in the sample and shake briefly. Wait for 30 seconds before taking readings.

IN HI 9218 AND HI 9219

Press READY: "YES" confirms the reading is stable.

The LCD on the right shows the pH reading compensated for temperature. The temperature reading is displayed on the LCD on the left.

Note: the electrode should be submerged approxi-

mately 4cm (1½") into the solution.

If the temperature probe is used, it should be located as close to the pH electrode as possible.

If measurements are taken in different samples successively, it is recommended that the electrode is rinsed thoroughly for better conditioning and to eliminate cross-contamination of the sample.

READY

pH°C

(1½ ")

4 cm

For the rinsing process, it is recommended to use a liberal amount of the next solution to be measured.

Using refillable electrodes

Unscrew the small refill cap to open the refill hole during measurements. After measurements replace the refill hole cap.

This will increase the pressure and give a faster response.

FOR HI 9218, HI 9219, HI 9318 ONLY

Press the PRINT key to get a printout at any time. All the printouts will be complete with date, time,

sample No. (for HI9318 only), temperature and pH (or mV with HI9318 only) value.

DATE : 01-02-96 TIME : 12:21 Hr °C : 17.9 pH : 7.18

DATE 1/02 TIME 12:21 SAMPLE 1 °C 17.9 pH 7.18

HI9218/HI9219 HI9318

Sample Printouts

MANUAL TEMPERATURE COMPENSATION

When the temperature probe is not connected, take the temperature of the solution with a ChecktempC or a glass thermometer.

FOR HI 9017 ONLY

To manually set a temperature value (e.g. 37.2°C) proceed as follows:

• press 3

• press 7

• press the key displaying decimal point "."

• press 2

• press TEMP

°C

32.7

TEMP

°C

With negative temperature values (e.g. -7.3°C) use the +/- key

• press 7

• press decimal point

• press 3

• press +/-

• press TEMP

7 +/-3.

TEMP

ºC

Notes:

1) For negative value inputs, always key in the value followed by the +/- key.

2) If the +/- key is pressed twice it will toggle back to the

°C

positive value.

The value will be displayed on the left LCD and "°C" symbol will be flashing.

FOR HI 9218 AND HI 9219 ONLY

Use the UP or DOWN keys to manually adjust the display reading to the value of the ChecktempC or the glass thermometer (e.g. 20°C). The value will be displayed on the left LCD and "°C" symbol will be flashing.

DOWN

ºC

FOR HI 9318 ONLY

Press the +/- key (for negative figures) followed by the noted temperature on the numeric keypad (e.g. 20°C). The value will be displayed on the small LCD. Then press the TEMP. key and the manually set temperature will be displayed on the left LCD with the "°C" symbol blinking.

SAMPLE

Note: with the temperature probe connected, the "°C" symbol is

displayed continuously and it is not possible to manually set the temperature.

°C

DATE

TEMP.

ºC

°C

TAKING TEMPERATURE MEASUREMENTS

Taking a temperature measurement is very easy. Turn the instrument ON. Make sure the temperature probe is connected and

allow the reading to stabilize (1 or 2 minutes). The temperature value will be displayed on the left LCD.

pH°C

TAKING ORP MEASUREMENTS (FOR HI 9017 AND HI 9318 ONLY)

HI9017 and HI9318 have the capability to take ORP measurements,

using an ORP electrode. Hanna Instruments offers a variety of ORP electrodes for this purpose (see page 59). Contact your Dealer for more information.

Just as pH measurements allow the acidity or the alkalinity of a substance to be expressed in numbers, oxidationreduction potential (redox) measurements provide the quantification of the oxidizing or reducing power of any liquid.

Connect the ORP electrode to the meter and submerge the tip (4 cm / 1½") into the sample to be tested.

Note: ORP measurements are taken without temperature compensa-

tion. Press the RANGE key once to enter the mV mode. Allow a few minutes for the reading to stabilize. The display will indicate the absolute mV value

(positive or negative). When values are less than ±400 mV, tenths of

mV are displayed; for values greater than ±400 mV, the decimal digit disappears.

Note that the change in scale (from 0.1 mV to 1 mV as resolution) is automatic.

"Err2" appears if the value exceeds ±1999 mV (out of range).

RANGE

(1½ ")

4 cm

FOR HI 9318 ONLY

Press PRINT key to get a printout at any time. All the printouts will be complete with date, time, sample No., tem-

perature and mV value.

DATE 1/02 TIME 12:40 SAMPLE 5 °C 20.5 mV -350.0

AFTER MEASUREMENTS

Press the OFF key to switch the instrument OFF.

See page 50 for storage, cleaning and maintenance procedures for electrodes.

OFF

PH CALIBRATIONPH CALIBRATION

PH CALIBRATION

PH CALIBRATIONPH CALIBRATION

IMPORTANT

The instrument's pH range should be re-calibrated:

••

• When the meter is new.

••

• Whenever the pH electrode is replaced.

••

• At least once a month.

••

• After testing aggressive chemicals.

••

• After cleaning procedure and changing the reference electrolyte.

••

• For greatest accuracy.

••

INITIAL PREPARATION

Pour small quantities (about 4cm / 1½" as level) of pH7.01 (HI7007 or HI8007) and pH4.01 (HI7004 or HI8004) or pH 10.01 (HI7010 or HI8010) solution into clean beakers. If possible use plastic beakers to minimize any EMC interferences.

I 7

HI 7004 HI 7007

If you are measuring in the acid range use pH4.01 as second buffer or pH 10.01 if you are measuring in the alkaline range.

Note: with HI9017 and HI9318, different pH values can be selected

for calibration purposes. See page 29 and 39 respectively. For accurate calibration, use two beakers for each buffer solution; the

first for rinsing the electrode, the second for calibration. In this way, contamination of the buffer is minimized.

RINSE

HI 7007

CALIBRATION

HI 7007

PH CALIBRATION FOR HI 9017

Procedure

••

• Switch the instrument on after connecting the

••

pH electrode and the temperature probe.

• Immerse the pH electrode and the ATC probe

into pH7.01 buffer solution. Shake briefly and wait 1-2 minutes for thermal equilibrium.

HI 7007

(1½

4 cm

Note: the electrode should be submerged approximately 4 cm (1½")

into the solution. The temperature probe should be positioned

as close to the pH electrode as possible.

• Press the CAL key.

CAL

The temperature compensated value of the buffer solution will appear on the left LCD and the pH symbol will be blinking.

pHpH

E.g. if the buffer temperature is at 25°C, the display on the right will show "pH7.01". If the buffer temperature is at 20°C, the display will show "pH 7.03" (see page26).

If a wrong buffer is used or the electrode is faulty, "Err4" will appear on the left display.

pHpH

• Allow 1-2 minutes for the pH reading to stabilize. Note: If you are not using the ATC probe, refer to page 25 to manually

correct for temperature.

• Press the CON key to accept the buffer value.

CON

"Err5" will appear on the left display and the buffer value will be transferred to the right LCD. The first point calibration is now complete.

Note: If a single point calibration is required, press the CAL key to

leave the calibration mode. However, it is always better to

proceed as follows for a 2-point calibration.

• Rinse the electrode and the temperature probe

before immersing them into pH 4.01 or pH10.01 calibration buffer, shake briefly and wait for thermal equilibrium.

At this moment, "Err5" will disappear. The display will show the temperature compensated value of the second buffer solution and the pH symbol will be blinking.

pHpH

If a wrong buffer or a faulty electrode has been used, "Err5" remains on the left display.

• Press the CON key to confirm the pH value.

The left display value is then transferred to the right display. The left LCD will show the temperature value to indicate that the meter is now calibrated.

HI 7004

CON

(1½

4 cm

ºC

°C

Note: The display on the left will indicate the temperature compen-

sated buffer value e.g. if the temperature is at 25°C, the

display will show "pH 4.01" or "pH 10.01", depending on the

solution used. If the temperature is at 20°C, the display will

show respectively "pH 4.00" or "pH 10.06" (see page 26). Note: During calibration the pH symbol blinks on the left display, and

the right display always shows the measured value.

+ 44 hidden pages