Hanna Instruments HI 9224 User Manual

Instruction Manual

HI9224 - HI92240

Portable

Microprocessor

Printing and Logging

pH Meters

instrum

nts

HI 9224

ICRO

PRO

pH M

CESSO

ETER

R PR

TING

PAPER

CAL

http://www.hannainst.com

This Instrument is 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

instrument. 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 directives EN 500811 and EN 50082-1.

TABLE OF CONTENTS

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

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

FUNCTIONAL DESCRIPTION HI9224 ..........................................................4

FUNCTIONAL DESCRIPTION HI92240 ........................................................5

SPECIFICATIONS ..................................................................................6

LCD FUNCTIONAL DESCRIPTION ................................................................7

INITIAL PREPARATION .............................................................................. 7

OPERATIONAL GUIDE ...............................................................................8

TAKING PH MEASUREMENTS ................................................................. 12

TAKING TEMPERATURE MEASUREMENTS ................................................ 12

PH CALIBRATION PROCEDURE ............................................................... 13

PRINTING / RECORDING WITH HI 9224 ................................................. 17

PRINTING / LOGGING WITH HI 92240 ................................................... 19

DATA TRANSFER TO PC ......................................................................... 25

FAULT FUNCTIONS ............................................................................... 26

MEMORY ORGANIZATION ...................................................................... 26

PRINTER MAINTENANCE ....................................................................... 27

ELECTRODE CONDITIONING AND MAINTENANCE ...................................... 29

BATTERY REPLACEMENT ....................................................................... 32

TEMPERATURE-RESISTANCE CORRELATION

FOR HANNA PH SENSITIVE GLASS .......................................................... 33

ACCESSORIES ...................................................................................... 35

ELECTRODE APPLICATION REFERENCE GUIDE .......................................... 41

WARRANTY ......................................................................................... 42

CE DECLARATION OF CONFORMITY ........................................................ 43

ISO 9000 Certified Company since 1992

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.

Each printing/logging pH meter is supplied complete with:

• HI1230B Combination pH Electrode

• HI7669/2W Temperature Probe

• AA size Alkaline Batteries (4 pcs)

• Paper rolls (5 pcs)

• Rugged Carrying Case.

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

instrument functions correctly. All defective items must be returned in their original packaging together with the supplied accessories.

GENERAL DESCRIPTION

HI9224 and HI92240 respectively, are the first printing and printing/ logging microprocessor-based portable pH/°C meters in the world.

All pH measurements are automatically compensated for temperature (ATC). The instruments' housing is made of rugged, lightweight material, making it truly portable.

Three memorized buffers (4.01, 7.01 and 10.01pH) and automatic buffer recognition technology make calibration simple. One or two point calibration is possible, and the meter has a stability indicator. The meters come equipped with a large, easy-to-read LCD.

Measurements can be performed with lab-grade precision in the field as well as in the laboratory without compromising accuracy.

For long term field and lab applications, these meters can be connected to a 12VDC adapter.

When in the logging mode HI92240 will store the present measurement into memory at a user selected interval from 1 to 180 minutes. This information can be retrieved at a later date for printing or can be transferred to a computer through an infrared transmitter. The internal software allocates memory space to store up to 8000 measurements.

An optional HI9200 transmitter can be connected to a computer's RS232 port.

The HI92240 will transfer the data in seconds through the infrared lights with no need for a cable between the transmitter and the meter.

FUNCTIONAL DESCRIPTION HI9224

instrum nts

HI 9224

MICROPROCESSOR PRINTING

pH METER

ON/OFF

CAL

PAPER

CFM

BUFF

RANGE LOG

1) Electrode Connector

2) Temperature Probe Connector

3) LCD Display

4) PAPER key to move the paper up

5) ON/OFF key, to turn the meter on or off

6) CAL key to enter or exit calibration mode

7) RANGE key, to select the pH or the °C measurement modes

8) Power adapter plug

9) CFM key to confirm the calibration reading

10) BUFF key to select the second buffer value for calibration

11) PRINT key to obtain a printout

12) LOG key to enter the printing mode

FUNCTIONAL DESCRIPTION HI92240

instrum nts

HI 92240

MICROPROCESSOR LOGGING

pH METER

PAPER

ALT

CAL

RANGE LOG

TIME

CON

1) Electrode Connector

2) Temperature Probe Connector

3) LCD Display

4) PAPER key to move the paper up

5) PRINT key to obtain a printout

6) ALT key Alternate Function Key

7) RANGE key to display the temperature or the pH

8) Power Adapter Plug for 12VDC battery charger

9) CAL key to enter or exit the calibration mode and to set up the interval, the date and the time.

10) CON key to confirm the calibration reading and to set up the interval, the date and the time.

11) TIME key to display the present time and the printing interval

12) LOG key to enter the logging mode

SPECIFICATIONS

Range pH 0.00 to 14.00

°C -10.0 to 100.0

Resolution pH 0.01

°C 0.1 Accuracy pH ±0.01, excluding probe error (@20°C/68°F) °C ±0.5, excluding probe error Typical EMC pH ±0.03 Deviation °C ±0.8 Calibration Automatic 1 or 2 points with 3 memorized

buffers (4.01, 7.01and 10.01 pH)

Temperature Automatic from -10 to 100°C (14 to 212°F) Compensation or fixed at 25°C without temperature probe Electrode HI 1230B (included) Temp. probe HI 7669/2W (included) Input Impedance 10 Printer Low power impact type-belt, 14 characters

Printing Interval 5 minutes

(HI9224 only)

Printing/Logging 1, 2, 5,10, 15, 30, 60, 120 and 180 minutes Interval

(HI92240 only)

Power supply 4x1.5V AA alkaline type/250 hours

Environment 0 to 50°C (32 to 122°F);

Dimensions 220 x 82 x 66 mm (8.7 x 3.2 x 2.6") Shipping Weight Instrument: 500 g (18 oz);

ohms

per line; 38 mm plain paper (HI 710034)

without printing. Auto-off after 5 minutes.

External 12 VDC supply.

0-95% RH not condensing

Kit: 1.4 kg (3.1 lb.)

LCD FUNCTIONAL DESCRIPTION

LO BAT

°C

LOG

1) Primary Display

2) Secondary Display

INITIAL PREPARATION

Each meter is supplied complete with batteries. Remove the back cover, unwrap the batteries and install them while paying attention to the polarity.

To prepare the instrument for use, connect the pH electrode to the BNC connector located on the top of the instrument. Then connect the temperature probe to the appropriate connector. The temperature probe can be used independently to take temperature measurements, or it can be used in conjunction with the pH electrode to utilize the meter's ATC capability. If the temperature probe is left disconnected, a default temperature of 25°C is assumed and the "C" symbol blinks.

°C

To switch the HI9224 on, press the ON/OFF key.

To switch the HI92240 on, press the RANGE key.

To maximize battery life, the display is automatically switched off after 5 minutes of non-use. However, the meter will continue to monitor (if in the logging or recording mode) pH and temperature. To revive the display, press the RANGE key. Before proceeding with pH measurements follow the calibration procedure.

ON/OFF

RANGE

OPERATIONAL GUIDE

DATE

SET DATE / TIME / PRINTING INTERVAL (FOR HI92240 ONLY):

Press the ALT and the TIME keys simultaneously. The display will show the date setting. At the bottom of the display the year will be flashing.

ALT

RANGE

CAL

TIME

Use the UP or the DOWN arrow key to select the year.

CAL

CON

When the correct year is selected, press the TIME key once.

TIME

The left digits of the display flash, showing the month.

DATE

Select the month by using the UP or the DOWN arrow key.

CAL

CON

Press the TIME key.

TIME

The right hand side of the display showing the day will flash.

DATE

Use the UP or the DOWN arrow key to select the correct day.

CAL

CON

Press the ALT and the TIME keys simultaneously.

ALT

RANGE

CAL

TIME

The display will now show the clock time with the printing interval flashing.

TIME

INTV

Any interval can be selected from 1, 2, 5, 10, 15, 30, 60, 120 or 180 minutes by using the UP and the DOWN arrow keys.

CAL

CON

Once the desired interval is selected press the TIME key once to set it.

TIME

The left digits of the display flash showing the hour.

TIME

INTV

To select the hour, press the UP or the DOWN arrow key (24 hour clock).

CAL

CON

To set the hour press the TIME key once.

TIME

INTV

TIME

DATE

The right hand side of the display showing the minutes will flash.

TIME

INTV

Use the UP or the DOWN key to select the minute.

CAL

CON

Press the ALT and the TIME keys simultaneously to leave this mode.

ALT

RANGE

CAL

TIME

Your clock, date and printing interval are now set and stored in memory even when the display is switched off.

TO VIEW DATE/TIME/PH/TEMPERATURE (FOR HI92240 ONLY)

To view time press the TIME key. This also displays the selected interval time.

TIME

To view the date, press the CAL arrow key when the LCD is displaying time.

To view pH press the RANGE key.

CAL

RANGE

°C

To view temperature when in pH mode, press the RANGE key.

°C

RANGE

If the “25.0” value with the flashing “°C” symbol is shown, it indicates that the temperature probe is not connected.

°C

Note: the pH value will be displayed without any symbol. The

temperature value will be displayed together with the °C symbol.

TO VIEW PH / TEMPERATURE (WITH HI9224 ONLY)

When the instrument is turned on the display will be in pH measurement mode. To view temperature simply press the RANGE key. If the “25.0” value with the flashing “C” symbol is shown, it indicates that the temperature probe is not connected.

RANGE

Note: the pH value will be displayed without any symbol. The

temperature value will be displayed together with the °C symbol.

RANGE

°C

TAKING PH MEASUREMENTS

To take pH measurements, simply submerge the bottom 4 cm (1½") of the electrode and the temperature probe in the reading solution to be tested, stir gently and allow for the electrode to

4 cm (1½")

adjust and stabilize. For greatest accuracy, it is recommended to calibrate the meter

regularly (see page 13). The pH reading of any sample is directly effected by temperature. In

order for the meter to measure the pH accurately, it must know the temperature. To use the meter's Automatic Temperature Compensation capability, submerge the temperature probe in the sample as close to the electrode as possible. If the temperature probe is disconnected, the meter assumes that the temperature of the solution is 25°C (default temperature) and the "°C" symbol blinks. Press the RANGE key to show the temperature reading.

If measurements are taken successively in different samples, it is recommended to rinse the electrode thoroughly with deionized water or if not available tap water first and then with some of the next sample to condition the electrode before immersing it in the sample.

TAKING TEMPERATURE MEASURE-

The temperature probe that is supplied with the HI 9224 and HI 92240 is a liquid/general purpose probe.

Taking a temperature measurement with HI 9224 and HI92240 is very easy.

Press the "RANGE" key to get into the °C mode. The temperature value and the "°C" symbol will be displayed on the primary display.

Secure the connection of the probe to the top of the meter, and take the measurement (allow 1 or 2 minutes for the temperature to stabilize).

Note: When taking pH measurements, in order

to have the best accuracy and proper temperature compensation, immerse the temperature probe as close as possible to the pH electrode.

MENTS

4 cm (1½")

pH CALIBRATION PROCEDURE

For greatest accuracy, it is recommended that the instrument is calibrated frequently. For a faster procedure, it is possible to calibrate at 1 point (pH 7.01), but it is always a good practice to calibrate at 2 points.

Due to electrode conditioning time the electrode must be kept immersed a few seconds to stabilize. The meters are equipped with a stability indicator and the user will be guided step by step with easy indications on the display during the pH calibration. This will make the calibration a simple and error-free procedure.

PH CALIBRATION HI 9224

1. Rinse the electrode with some pH 7.01

(HI7007) solution or clean water. Dip the bottom 4 cm (1½") of the electrode and the temperature probe into a beaker containing pH7.01 solution.

HI 7007

4 cm (1½")

2. Press the CAL key. The secondary (lower) LCD

will blink “7” to indicate that pH 7.01 is expected and the electrode is conditioning.

3. When the “7” stops blinking, the calibration

can be confirmed. Wait 30 seconds and press the CFM key to confirm the first buffer.

4. If everything is satisfactory the secondary

LCD will blink “4” expecting the second buffer at pH 4.01. If wrong solution or electrode have been used or if the buffer is out of specifications, E1 will blink to alert the user.

Note: If only a single point calibration is re-

quired, press CAL to leave the calibration mode. However, it is always better to proceed as follows with a two point calibration.

CAL

CFM

CAL

5. “4” can be changed to “10” (indicating pH

BUFF

10.01) by pressing BUFF button. If you are measuring acid samples (pH 7 or less) use the pH 4.01 buffer (HI7004). For alkaline solutions (pH 7 or greater) use pH 10.01 (HI7010).

6. Rinse the electrode with clean water or some

pH4.01 (or 10.01) solution. Dip the bottom 4 cm (1½") of the electrode in a beaker containing the second buffer.

7. When “4” (or “10”) stops blinking, indicat-

ing that the electrode has stabilized, wait 30 seconds and then press CFM again to confirm the second calibration point.

HI 7004

4 cm (1½")

8. The buffer reference disappears from the

secondary display and the meter is calibrated and ready to use.

9. If the buffer is incorrect or the electrode is

defective, E2 will blink to alert the user. Repeat the calibration procedure from the beginning with fresh buffers. If you cannot complete the calibration, check your electrode by following the conditioning and maintenance procedure on page 29 and repeat calibration. The pH electrode might have to be replaced if calibration cannot be successfully performed.

PH CALIBRATION HI 92240

1. Rinse the electrode with some pH 7.01

(HI7007) solution or clean water. Dip the bottom 4 cm (1½") of the electrode and the temperature probe into a beaker containing pH7.01 solution.

2. Press the CAL key. The secondary (lower)

LCD will blink “7” to indicate that pH

7.01 is expected and the electrode is conditioning.

HI 7007

CFM

CAL

4 cm (1½")

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