Hanna Instruments HI 2212 User Manual

Instruction Manual

HI 2212 HI 2213

pH/mV/°C

Bench Meters

with Custom Buffers

www.hannainst.com

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

use of these instruments, as well as a precise idea of their versatility. If you need additional technical information, do not hesitate to e-mail us

at tech@hannainst.com or view our worldwide contact list at www.hannainst.com.

WARRANTYWARRANTY

WARRANTY

WARRANTYWARRANTY

HI 2212, HI 2213 are guaranteed for two years against defects in workmanship and materials when used for their 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 CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

TABLE OF CONTENTSTABLE OF CONTENTS

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

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

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

FUNCTIONAL DESCRIPTION HI 2212 AND HI 2213 .................................... 4

HI 2212 AND HI 2213 SPECIFICATIONS ................................................... 5

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

pH CALIBRATION ...................................................................................... 8

pH BUFFER TEMPERATURE DEPENDENCE ................................................. 13

GOOD LABORATORY PRACTICE (GLP) ........................................................ 14

SETUP .................................................................................................. 17

TEMPERATURE CALIBRATION (for technical personnel only) .......................... 20

mV CALIBRATION (for technical personnel only) .......................................... 22

RELATIVE mV CALIBRATION (HI 2213) .................................................... 23

ELECTRODE CONDITIONING & MAINTENANCE ............................................. 24

TROUBLESHOOTING GUIDE ..................................................................... 27

TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ............................. 28

ACCESSORIES ........................................................................................ 29

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

PRELIMINARY EXAMINATION

PRELIMINARY EXAMINATIONPRELIMINARY 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 7662 Temperature Probe

• HI 76404N Electrode Holder

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

• HI 7071 Electrolyte Solution

• HI 700661 Electrode Cleaning 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 DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

GENERAL DESCRIPTIONGENERAL DESCRIPTION

The HANNA HI 2212 and HI 2213 are microprocessor based pH and temperature bench meters.

HI 2213 can also measure Oxidation Reduction Potential (ORP) in mV range. Relative mV feature is also provided.

pH measurements are compensated for temperature effect manually or automatically with the HI 7662 temperature probe.

Calibration can be performed at up to three-points using two custom buffers and five standard buffers.

The GLP feature provides data consistency. A calibration due alarm can be set to alert the user that too much time

elapsed since the last pH calibration.

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

HI 2212 AND HI 2213HI 2212 AND HI 2213

HI 2212 AND HI 2213

HI 2212 AND HI 2213HI 2212 AND HI 2213

Front Panel

Rear Panel

1) Liquid Crystal Display (LCD).

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

3) CFM/GLP key, to confirm 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 or to toggle between the buffer value and temperature during calibration or to change the focused data in setup (HI 2213 only).

u key, to toggle between the buffer value and temperature during calibration or to change the focused data in setup (HI 2212 only).

8) MEM key, to store a value into memory.

9) MR key, memory recall.

10) ON/OFF switch.

11) Power supply socket.

12) BNC electrode connector.

13) Temperature probe socket.

14) Electrode reference socket.

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HI 2212 AND HI 2213HI 2212 AND HI 2213

HI 2212 AND HI 2213

HI 2212 AND HI 2213HI 2212 AND HI 2213

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONSSPECIFICATIONS

OPERATIONAL GUIDEOPERATIONAL GUIDE

OPERATIONAL GUIDE

OPERATIONAL GUIDEOPERATIONAL GUIDE

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 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 located on the rear panel.

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

pH MEASUREMENTS

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

• Submerse the electrode tip and the temperature probe approximately 3 cm (1¼”) into the sample to be tested and stir gently. Allow time for the

3 cm

(1¼")

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 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 submerse the HI 7662 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, manual temperature compensation can be used by disconnecting the temperature probe.

The display will show the last temperature reading with the “ºC” tag blinking.

The temperature can now be adjusted with the ARROW keys (from –20.0 ºC to 120.0 ºC).

mV/ORP MEASUREMENTS (HI 2213)

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.

• Press RANGE to enter mV range.

• Submerse the tip of the ORP electrode 3 cm (1¼”) into the sample to be tested and allow a few

3 cm

(1¼")

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 (HI 2213)

• Press RANGE until “rEL” message will be displayed on the secondary LCD line for 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.

TEMPERATURE MEASUREMENTS

Connect the HI 7662 appropriate socket and turn the instrument on.

Submerse the temperature allow the reading on the secondary LCD to stabilize.

MEMORY FUNCTION

Press and hold down MEM key to store the last reading in the meters memory. The “MEM” tag will be displayed.

temperature probe to the

probe

into the sample and

Press MR (memory recall) key to display the memorized reading. The “MEM” tag will be displayed.

H CALIBRATIONH CALIBRATION

H CALIBRATION

H CALIBRATIONH CALIBRATION

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 26).

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, 9.18 as second buffer.

PROCEDURE

Calibration can be performed up to three-points. For accurate measurements, a three-point calibration is recommended.

However, a one or two point calibration can also be used. The calibration buffers can be selected from the calibration buffer list that

includes custom buffers and the memorized standard buffers:

• pH 4.01, 6.86, 7.01, 9.18 and 10.01.

The custom buffers allow the user to calibrate in a buffer solution different from a standard one. Up to two custom buffers can be set in SETUP menu (see page 17). Each custom buffer value can be changed in a ±1.0 pH window around the set value (in according with temperature), during calibration, when it is selected; the “BUFFER pH” tag will blink.

The instruments will automatically skip the buffer used during calibration and the buffers which are in a ±0.2 pH window, around one of the calibrated buffers.

All new calibrations will override existing stored calibration data in a ±0.2 pH window. The slopes adjacent to the new points will be reevaluated.

THREE-POINT CALIBRATION

BUF

• 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 CAL. The “CAL” and “

” tags will

3 cm

(1¼")

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 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.

• After the first calibration point is confirmed, submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) 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 is then displayed on the primary LCD and and the third expected buffer value on the secondary LCD.

• After the second calibration point is confirmed, submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) into the next 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 value and returns to measurement mode.

TWO-POINT CALIBRATION

• Proceed as described in “THREE-POINT CALIBRATION” section.

• Press CAL after the second calibration point was confirmed. The instrument will memorize the calibration data and return to measurement mode.

ONE-POINT CALIBRATION

Two SETUP selectable options are available: “Pnt” and “OFFS”. If the “Pnt” option is selected, the new calibration point overrides an

existing one. The adjacent slopes will be reevaluated. If the “OFFS” option is selected, an electrode offset correction is performed.

The existing slopes will remain unchanged.

• Proceed as described in “THREE-POINT CALIBRATION” section.

• Press CAL after the first calibration point was confirmed. The instrument will memorize the one-point calibration data and return to measurement mode.

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

selected buffer, “WRONG” “ ” and “WRONG” “ ” tags will blink alternately. Check if the correct buffer has been used, or clean the electrode by following the Cleaning Procedure (see page 26). If necessary, change the buffer or the electrode.

• When a custom buffer is displayed, the “BUFFER pH” tag blinks. To change the custom buffer value in according with the buffer temperature proceed as described in “WORKING WITH CUSTOM BUFFERS” (see page 12).

• If the buffer temperature or the manual temperature exceeds the temperature limits of the buffer, “WRONG” tag and temperature reading will blink.

• If “WRONG”, “BUFFER pH” tags and “OLd” message are displayed blinking on the secondary LCD line, an inconsistency between new and previous (old) calibration is detected. Clear calibration parameters and proceed with calibration from the current calibration point. The instrument will keep all confirmed values during current calibration.

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