Hanna Instruments HI 2209 User manual

Instruction Manual
HI2209 • HI22091
Bench pH Meters
www.hannainst.com

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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 the 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 [email protected] or view our worldwide contact list at
www.hannainst.com.
All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner.

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PRELIMINARY EXAMINATION ........................................................4
GENERAL DESCRIPTION................................................................4
FUNCTIONAL DESCRIPTION...........................................................5
SPECIFICATIONS..........................................................................6
OPERATIONAL GUIDE...................................................................6
pH CALIBRATION.........................................................................8
pH BUFFER TEMPERATURE DEPENDENCE ...................................11
ELECTRODE CONDITIONING AND MAINTENANCE........................... 12
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS .............. 15
ACCESSORIES............................................................................16
ELECTRODE APPLICATION REFERENCE GUIDE...............................21
TABLE OF CONTENTS

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HI2209 bench pH meter is designed for simplicity of use.
It features a large easy-to-read liquid crystal display (LCD) and user
friendly keyboard.
The pH calibration is made simple through the easy-to-operate front
panel knobs for offset and slope adjustment.
A front knob is provided for easy manual set for temperature compen-
sation of the pH reading.
HI2209 can also measure ORP (Oxidation Reduction Potential) in
the mV range.
The range selection (pH, mV or °C for temperature compensation) is
made simple through the front membrane keyboard.
It is also available the model HI22091 with recorder output feature.
GENERAL DESCRIPTION
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, please contact your local
Hanna Instruments Office.
Each meter is supplied complete with:
• HI1332B plastic-body combination double-junction refillable
pH electrode with BNC connector and 1 m (3.3') cable
•12 Vdc adapter
•Instruction manual
•Quality Certificate.
Note: Save all packing material until you are sure that the instru-
ment functions correctly. All defective items must be returned in
the original packing with the supplied accessories.

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FUNCTIONAL DESCRIPTION
1) Liquid Crystal Display (LCD)
2) Temperature setting knob
3) °C range selection key
4) mV range selection key
5) pH range selection key
6) pH offset adjustment knob
7) pH slope adjustment knob
8) Sample holders
9) Analog output connectors (HI22091 only)
10) BNC electrode connector
11) Reference electrode socket
12) Power adapter socket
13) ON/OFF switch
Front Panel
Rear Panel

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OPERATIONAL GUIDE
SPECIFICATIONS
RANGE 0.00 to 14.00 pH
±1999 mV
RESOLUTION 0.01 pH
1 mV
ACCURACY @ 25 °C ±0.01 pH
±1 mV
pH Calibration Manual, 2 point, through knobs
Temperature
Compensation
Manual from 0 to 100 °C
(32 to 212 °F)
pH Electrode
(included)
HI1332B plastic body, double junction,
refillable, with BNC and
1 m (3.3') cable
Analog Output
(HI22091 only)
0 to 5 V
0 to 14 pH/-1999 to + 1999 mV
Temperature: always 0
Input Impedance 1012 ohms
Power Supply 12 Vdc adapter (included)
Environment 0 to 50 °C (32 to 122 °F)
max. 95% RH non-condensing
Dimensions 235 x 222 x 109 mm
(9.2 x 8.7 x 4.3”)
Weight 1.3 Kg (2.9 lbs)
POWER CONNECTION
Plug the supplied 12 Vdc adapter into the power supply socket (#12
on page 5).
Note: Make sure the mains line is protected by a fuse.
ELECTRODE CONNECTION
For combination pH or ORP electrodes (with internal reference) connect
the electrode's BNC to the socket provided (#10 on page 5).
For an electrode with a separate reference, connect the measuring
electrode's BNC to the BNC socket (#10 on page 5) and the reference
electrode's jack to the socket provided (#11 on page 5).

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Note: To prevent damage to the electrode, remove the pH elec-
trode from the solution before turning the meter off.
If the meter is OFF, detach the electrode from the meter before
immersing the electrode in the storage solution.
TAKING pH MEASUREMENTS
Make sure that the instrument has been calibrated for
pH before taking pH measurements.
• Put the beakers (bottles 50 or 100 mL) with the
solutions under test on the sample holders.
• Switch the instrument on by pressing the ON/OFF
switch.
• Press the pH key to display the pH measurement.
• Immerse the electrode tip (4 cm / 1½") into the
sample and shake briefly.
• Take the temperature of the solution with a
ChecktempC or a glass thermometer (e.g.25 °C).
• Press and hold the Temp key to display tempera-
ture setting on the LCD and adjust the temperature
knob to display the temperature of the sample.
• Release Temp key. The meter returns to pH range.
• The display shows the pH value of the test solution compensated
for temperature.
If measurements are taken in different samples successively, it is recom-
mended that the electrode be rinsed thoroughly for better conditioning
and to eliminate cross-contamination of the sample.
For the rinsing process, it is recommended to use a liberal amount of
the next solution to be measured.

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pH CALIBRATION
• 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 compensation.
• Press the mV key to enter the mV mode. Allow
a few minutes for the reading to stabilize.
• The display will indicate the mV value (positive
or negative).
AFTER MEASUREMENTS
• Press the ON/OFF switch to switch the instrument off.
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 use in aggressive chemicals.
• After cleaning procedure and changing the reference electrolyte.
• For greatest accuracy.
PREPARATION
Pour small quantities (up to 4 cm / 1½" level)
of pH7.01 (HI7007) and pH4.01 (HI7004) or
pH10.01 (HI7010) solution into clean beakers
(50 or 100 mL bottles). If possible use plastic
beakers to minimize any EMC interferences.
TAKING ORP MEASUREMENTS
HI2209 and HI22091 have the capability to take ORP measurements,
using an ORP electrode. Hanna Instruments offers a variety of ORP
electrodes for this purpose (see accessories). Contact your local Hanna
Instruments Office for more information.

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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.
Note: The electrode should be submerged approximately
4 cm (1½") into the solution.
If you need to calibrate to NBS standards, use pH6.86 (HI7006)
and pH9.18 (HI7009) instead of pH7.01 and 10.01 respectively.
Use a ChecktempC or a glass thermometer as reference.
Put the beakers with the calibrations solutions on the beaker holders
on the top of the instrument.
PROCEDURE
• Switch the instrument on by pressing the
ON/OFF switch.
• Rinse and immerse the pH electrode into pH7.01
buffer and shake briefly. Wait for the reading to
stabilize.
• Note the temperature of the buffer solution using a
ChecktempC or a glass thermometer (e.g. 20 °C).
• Press and hold the Temp key to select temperature
setting.
• Adjust the Temperature knob until the LCD shows
the noted temperature.
• Release the Temp key. The instruments returns to
pH range.
If you are measuring in the acid range,
use pH4.01 as second buffer; if you are
measuring in the alkaline range, use
pH10.01 as second buffer.

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• Rinse and immerse the pH electrode in pH4.01 / pH10.01 buffer
and shake briefly.
• Wait a couple of minutes and adjust the Slope knob until display
shows the pH value at the noted temperature (see the pH versus
temperature chart).
• The pH calibration is now complete.
• Wait a couple of minutes and adjust the Offset knob until display
shows the pH value at the noted temperature (see the pH versus
temperature chart).