Hanna Instruments HI92240 Instruction Manual

HI 9224

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Instruction Manual

HI9224 - HI92240

Portable

Microprocessor

Printing and Logging

pH Meters

http://www.hannainst.com

This Instrument is in

Compliance with the CE Directives

2

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.

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

TABLE OF CONTENTS

3

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.

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.

PRELIMINARY EXAMINATION

GENERAL DESCRIPTION

4

FUNCTIONAL DESCRIPTION HI9224

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

HI 9224

ON/OFF

PAPER

CAL

instrum nts

e

CFM

PRINT

BUFF

RANGE LOG

3

4

5

6

7

9

10

11

12

MICROPROCESSOR PRINTING
pH METER

8

1

2

pH

5

FUNCTIONAL DESCRIPTION HI92240

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

HI 92240

PRINT

PAPER

ALT

instrum nts

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CAL

TIME

CON

RANGE LOG

3

4

5

6

7

9

10

11

12

MICROPROCESSOR LOGGING
pH METER

8

1

2

pH

6

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

12

ohms

Printer Low power impact type-belt, 14 characters

per line; 38 mm plain paper (HI 710034)
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

without printing. Auto-off after 5 minutes.

External 12 VDC supply.
Environment 0 to 50°C (32 to 122°F);

0-95% RH not condensing

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

Kit: 1.4 kg (3.1 lb.)

7

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.

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.

°C

RANGE

ON/OFF

RANGE

1) Primary Display

2) Secondary Display

LOG

LO BAT

pH

°C

1

2

LCD FUNCTIONAL DESCRIPTION

8

TIME

DATE

OPERATIONAL GUIDE

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.

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

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

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

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

Press the TIME key.

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

CAL

CON

CAL

TIME

ALT

RANGE

DATE

CAL

CON

TIME

DATE

9

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

Press the ALT and the TIME keys simultaneously.

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

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.

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

The left digits of the display flash showing the hour.

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

To set the hour press the TIME key once.

CAL

CON

CAL

INTV

TIME

CON

CAL

TIME

ALT

RANGE

TIME

INTV

TIME

CAL

CON

TIME

10

CAL

TIME

ALT

RANGE

TIME

INTV

TIME

CAL

DATE

RANGE

pH

INTV

TIME

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

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

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

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.

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

To view pH press the RANGE key.

CAL

CON

11

°C

RANGE

To view temperature when in pH mode, 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.

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.

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

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

RANGE

°C

°C

12

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.

RANGE

4 cm

(1½")

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
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.

4 cm

(1½")

RANGE

°C

TAKING PH MEASUREMENTS

TAKING TEMPERATURE MEASURE-

MENTS

13

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.

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.

4 cm

(1½")

HI 7007

CAL

CFM

CAL

14

pH

4 cm

(1½")

HI 7007

CAL

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

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.

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.

BUFF

4 cm

(1½")

HI 7004

CFM