Hanna Instruments HI 2222 Manual de usuario

Instruction Manual

HI 2222

pH/mV/ºC

Bench Meter

with Calibration Check

Dear Customer,

Thank you for choosing a Hanna Instruments product.

Please read this instruction manual carefully before using this instrument.

This manual will provide you with the necessary information for correct

use of this instrument, as well as a precise idea of its versatility.

If you need additional technical information, do not hesitate to e-mail us

at [email protected].

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

WARRANTY ............................................................................................ 2

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

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

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

HI 2222 SPECIFICATIONS ........................................................................ 5

OPERATIONAL GUIDE ............................................................................... 6

pH CALIBRATION ..................................................................................... 9

ENHANCED CALIBRATION MESSAGES ....................................................... 13

ELECTRODE CONDITION & ELECTRODE RESPONSE TIME ............................ 15

pH BUFFER TEMPERATURE DEPENDENCE ................................................ 16

GOOD LABORATORY PRACTICE (GLP) ....................................................... 17

LOGGING.............................................................................................. 19

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

TEMPERATURE CALIBRATION (for technical personnel only) ......................... 25

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

PC INTERFACE ....................................................................................... 27

ELECTRODE CONDITIONING & MAINTENANCE ........................................... 31

TROUBLESHOOTING GUIDE .................................................................... 34

TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ........................... 35

ACCESSORIES ........................................................................................ 36

RECOMMENDATIONS FOR USERS ............................................................ 39

WARRANTYWARRANTY

WARRANTY

HI 2222 is guaranteed for two years against defects in workmanship and

materials when used for their intended purpose and maintained according

to instructions. The electrodes and the probes are guaranteed for a

period of six months. This warranty is limited to repair or replacement free

of charge.

Damage due to accidents, misuse, tampering or lack of prescribed

maintenance are 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 packaged for complete protection.

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

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 complete with:

•HI 1048P Glass-body Combination pH Electrode with 1 m (3.3 “)

cable

•HI 7662 Temperature Probe

•HI 76404N Electrode Holder

•pH 3.00 & 7.01 Buffer Solutions (20 mL each)

•HI 700365 Cleaning Solution for wine deposits (2x20 mL)

•HI 700636 Cleaning Solution for wine stains (2x20 mL)

•HI 7082 Electrode Refiling Solution (30 mL)

• 12 VDC Power Adapter

• Instruction Manual

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

functions correctly. All defective items must be returned in the

original packing with the supplied accessories.

GENERAL DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

HI 2222 is a logging microprocessor-based pH/ORP/temperature bench

meters with Calibration Check.

Calibration Check performs a set of diagnostic tests during calibration

using the history of electrode slope and offset to detect problems that can

cause loss of accuracy.

Calibration Check Features are:

• Enhanced Calibration Messages

During calibration the user is warned if one or more parameters are not suitable

to perform an accurate calibration.

• Electrode Condition on LCD Display

Determined from the electrode offset and slope.

• Electrode response time on LCD Display

Determined from electrode performance during calibration.

Other features include: up to two point calibration with seven memorized

buffers (1.68, 3.00, 6.86, 7.01, 9.18, 10.01 and 12.45 pH), logging

up to 100 samples, GLP, calibration due alarm, pH reading with manual

or automatic temperature compensation and PC software interface.

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

Front Panel

Rear Panel

1) Liquid Crystal Display (LCD).

2) CAL key, to enter and exit calibration mode.

3) CFM/GLP key, to confirm calibration, different values or to display

Good Laboratory Practice information.

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

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

6) SETUP key, to enter/exit SETUP mode.

7) RANGE key, to select measurement range, switch to focused data in

SETUP or toggle between buffer value and temperature during

calibration.

8) LOG/CLR key, to store a value into memory, to clear pH calibration,

or to delete log records.

9) RCL key, memory recall.

10) ON/OFF switch.

11) Power supply socket.

12) USB connector.

13) BNC electrode connector.

14) Temperature probe socket.

15) Electrode reference socket.

HI 2222HI 2222

HI 2222

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

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POWER CONNECTIONPOWER CONNECTION

POWER CONNECTION

Plug the 12 VDC adapter into the power supply socket.

Notes: • These instruments use non volatile memory to retain the pH,

mV, temperature calibrations and all other settings, even

when unplugged.

• Make sure a fuse protects the mains line.

ELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONS

ELECTRODE AND PROBE CONNECTIONS

For HANNA P Type pH or ORP electrodes (with internal reference) connect

the electrode’s BNC to the socket on the back of the instrument and the

pin to the reference socket.

Note: Electrode condition and response information is displayed on the

bar graph gauges during the day the calibration is performed,

only if HANNA P type (PIN) electrodes are used.

If the electrode is not recognized as a HANNA P type electrode, the

bar graph gauges will blink (25 seconds OFF, 4 seconds ON, full

bar graph).

For temperature measurement and automatic temperature compensation

connect the temperature probe to the appropriate socket.

INSTRUMENT STINSTRUMENT ST

INSTRUMENT STARTART

ARTART

ART-UP-UP

-UP-UP

-UP

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

the rear panel.

• All LCD tags are displayed and a beep is sounded while the instrument

performs a self test.

• The instrument will display “LoAd” message and “ ” blinking until

initialization is complete.

• The “Unscrew electrode refilling cap” message reminds the user

to loosen or remove the electrode refilling cap to improve the electrode’s

response time.

• The instrument automatically defaults to pH measurement mode

unless a HANNA P type ORP electrode is detected.

OPERATIONAL GUIDEOPERATIONAL GUIDE

OPERATIONAL GUIDE

pH MEASUREMENTpH MEASUREMENT

pH MEASUREMENT

Make sure the instrument has been calibrated

before taking pH measurements.

• Submerse the tip of a properly conditioned

electrode (see page 31) and the temperature

probe approximately 3 cm (1¼”) 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.

• The pH reading is out of range, the closest full-scale value will be

displayed blinking on the primary LCD.

• It is also possible to view the mV reading by pressing the RANGE key.

Ifmeasurements aretaken successively in different samples, it isrecommended

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, this temperature effect must be compensated for. To use the

Automatic Temperature Compensation feature, connect and submerse the

HI 7662 temperature probe into the sample as close to the electrode as

possible and wait for a few minutes.

If the temperature of the sample is known, manual

temperature compensation can be used by disconnecting

the temperature probe.

The display will show the last recorded temperature

reading with the “°C” symbol blinking.

The temperature can now be adjusted with the ARROW keys (from

-20.0 ºC to 120.0 ºC).

MTC

SLOW FAST

POOR GOOD

ATC

3 cm

(1¼")

3 cm

(1¼")

ORP MEASUREMENTSORP MEASUREMENTS

ORP MEASUREMENTS

An optional ORP electrode must be used to perform ORP measurements

(see Accessories).

Oxidation-Reduction Potential (REDOX) measurements provide the

quantification of the oxidizing or reducing power of the tested sample.

The surface of the ORP electrode must be clean and smooth in order to

obtain an accurate measurement.

Pretreatment solutions are available to condition the electrode and speed

up the response time.

• The instrument automatically defaults to the

mV measurement mode if HANNA P type ORP

electrode is detected.

• Submerse the ORP electrode tip (3 cm/1¼”)

into the sample. Allow a few minutes for the

reading to stabilize.

• The instrument displays the mV reading on the primary LCD.

• If the reading is out of range, the closest full-scale value will be

displayed blinking on the primary LCD.

TAKING TEMPERATURE MEASUREMENTSTAKING TEMPERATURE MEASUREMENTS

TAKING TEMPERATURE MEASUREMENTS

Connect the HI 7662 temperature probe and turn the

instrument on. Dip the temperature probe into the sample

and allow the reading on the secondary LCD to stabilize.

Calibrate the instrument frequently, especially if high accuracy is

required. For best results and constant display of electrode condition

and electrode response on the bar graph gauges, daily calibration is

recommended.

The instrument should be re-calibrated:

• Whenever the pH electrode is replaced.

• At least once a day.

• After testing aggressive chemicals.

• If high accuracy is required.

• If “CAL DUE” message is displayed during measurement.

Every time you calibrate the instrument use fresh buffers and perform an

electrode cleaning procedure (see page 33).

PREPARATIONPREPARATION

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.

PROCEDUREPROCEDURE

PROCEDURE

A two-point calibration is recommended, however a one-point calibration

will be permitted. Calibration can be performed using the seven

memorized buffers:

•pH 1.68, 3.00, 6.86, 7.01, 9.18, 10.01 and 12.45.

pH CALIBRATIONH CALIBRATION

H CALIBRATIONH CALIBRATION

H CALIBRATION

TWO-POINT CALIBRATIONTWO-POINT CALIBRATION

TWO-POINT CALIBRATION

For most applications it is recommended that pH 7.01 or 6.86 buffers be

used as the first calibration point and pH 3.00 (for acidic samples) or pH

9.18/10.01 (for alkaline samples) as the second calibration point.

Note: The pH 12.45 buffer is not for general measurement; use only if

the sample is very alkaline to avoid sodium error.

• Submerse the pH electrode and the temperature probe approximately

3 cm (1¼”) into a buffer solution and stir gently. The temperature

probe should be close to the pH electrode.

• Press the CAL key. “CAL” and “pH” tags will be on, and the

“CLEAR CAL if new electrode” tag will blink.

• Press the CLR key if you are using a new electrode or want to clear

the calibration history. The instrument will display the “donE”

message for a few seconds.

• Press the CAL key, or wait a few seconds to continue.

It is very important to clear the calibration history when a new electrode

is used because all error and warning messages that appear during

calibration depend on the calibration history.

Note: • The “CLEAR CAL if new electrode” will only appear if the

instrument has been previously calibrated.

• The “CAL”, “pH” and “BUFFER” tags will appear and the

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

• Press the ARROW keys to select a different buffer value, if

necessary.

• The “ ” tag will blink until the reading has stabilized.

CLEAR CAL if new electrode

CAL

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