Hanna Instruments HI 9126 User manual

1
Instruction Manual
HI 9126
Calibration Check
Waterproof
pH/mV/ºC Meter
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 the instrument.
This manual will provide you with the necessary information for correct
use of the 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].
WARRANTY .................................................................................. 2
PRELIMINARY EXAMINATION ......................................................... 3
GENERAL DESCRIPTION ................................................................. 3
FUNCTIONAL DESCRIPTION ........................................................... 4
SPECIFICATIONS........................................................................... 5
OPERATIONAL GUIDE.................................................................... 6
pH CALIBRATION ....................................................................... 10
pH BUFFER TEMPERATURE DEPENDENCE ....................................... 15
SETUP MENU ............................................................................. 16
mV CALIBRATION ....................................................................... 18
TEMPERATURE CALIBRATION ....................................................... 18
BATTERIES REPLACEMENT ............................................................ 19
LCD MESSAGE GUIDE .................................................................. 21
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS................ 22
ELECTRODE CONDITIONING & MAINTENANCE ................................ 23
TROUBLESHOOTING GUIDE ......................................................... 25
ACCESSORIES ............................................................................. 26
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
HI 9126 is 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
instruments. 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 instruments are 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 CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS

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GENERAL DESCRIPTION
HI 9126 is a state-of-the-art waterproof, heavy-duty pH meter designed
to provide laboratory results and accuracy under harsh industrial condi-
tions.
A large multil-level LCD, with clear indications related to the electrode and
instrument status, pH and temperature displayed simultaneously, and
user friendly graphic symbols during calibration.
This meter is provided with a series of new diagnostic features which add
an entirely new dimension to pH measurement, by allowing the user to
dramatically improve the reliability of the measurement:
•7 memorized buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01
and 12.45) for calibration
•Custom calibration (up to two custom buffers)
•Messages on the LCD to make the calibration easy and accurate
•Diagnostic features to alert the user when the electrode needs cleaning
•Monitoring of the electrode aging
•User-selectable “calibration time-out” to remind you when a new
calibration is necessary
HI 9126 can also measure for Oxidation Reduction Potential in the mV
range with a resolution of 0.1 mV.
It offers an extended temperature range from –20 °C (–4 °F) to 120 °C
(248 °F).
Remove the instrument from the packing material and examine it 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 meter is supplied with:
•HI 1048B glass-body pH electrode, with CPSTM technology,
BNC connector, 1 m (3.3’’) cable
•HI 7662 stainless steel temperature probe with 1 m (3.3’’) cable
•pH 3.00 & pH 7.01 buffer solutions, 20 mL sachet
•HI 700635 wine deposit electrode cleaning solution sachet
•HI 700636 wine stain electrode cleaning solution sachet
•HI 7082 electrolyte solution (30mL) with seringe
•100 mL plastic beaker
•3 x 1.5V AAA Batteries
•Instruction manual
•Rugged carrying case
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.
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION

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1) Liquid Crystal Display (LCD).
2) RANGE key, to select pH or mV.
3) ON/OFF key, to turn the meter ON and OFF.
4) CAL key, to enter or exit calibration mode.
5) SETUP/CFM key, to enter SETUP mode or to confirm calibration.
6) Battery compartment cap.
7) Temperature probe socket.
8) BNC electrode connector.
9) MR/CUST BUF key, to recall the stored value from memory or
to enter custom buffer values.
10) MEM/CLR key, to store the reading in memory or to clear
calibration.
11) pand qkeys, for manual temperature setting, entering
menu parameters or changing buffer value.
12) LIGHT key, toggle to switch the display backlight on and off.
13) Secondary display.
14) Primary display.
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION

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SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS

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INITIAL PREPARATION
The meter is supplied with batteries (for details see page 19).
To prepare the instrument for use, connect the pH electrode and the
temperature probe to the BNC and temperature sockets on the top of
the instrument. 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 Automatic Temperature
Compensation (ATC) mode. If the probe is disconnected, temperature
can also be set manually with the ARROW keys.
Turn the instrument ON by pressing ON/OFF.
At start-up the display will show all LCD segments and then the
battery percentage while the instrument performs a self check (or as
long as the button is held).
The meter will automatically enter measurement mode.
After measurement switch the meter off. Clean the electrode and store
it with a few drops of HI 70300 storage solution in the protective cap.
To save the batteries, the auto-off feature turns the meter off
after 20 minutes (no button pressed). To disable this feature, see
“Setup Menu” section on page 16.
pH MEASUREMENTS
To take a pH measurement remove the electrode
protective cap and submerse the electrode and
the temperature probe 3 cm (1¼”)into the
sample and stir gently.
If necessary, press the RANGE key until the
display shows pH mode.
Allow time for the reading to stabilize.
3 cm
(1¼”)
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE

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The LCD will show the pH measurement and the temperature of the
sample.
In order to take more accurate pH measurements, make sure that the
instrument is calibrated (see page 10 for details).
The glass bulb and the junction on your electrode should always be
moist, never allow it to dry out.
If several measurements are taken successively in different samples,
rinse the electrode thoroughly with deionized or tap water and a
small amount of the sample to be measured.
The pH reading is directly affected by temperature. In order for the meter
to measure the pH accurately, temperature must be compensated for. If
the sample temperature is different from the temperature at which the pH
electrode was kept, allow a few minutes for thermal equilibration.
To use the meter's Automatic Temperature Compensation feature,
submerse the temperature probe into the sample as close to the
electrode as possible and wait for a few minutes.
If manual temperature compensation is desired the temperature
probe must be disconnected from the instrument.
The display will show the default temperature of 25 °C, or the last
temperature set the “°C”(or “°F”) indicator will blink.
The temperature can now be adjusted with the ARROW keys.

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MEM & MR FUNCTIONS
Pressing the MEM key will memorize the reading on the display and
store it in the internal memory. The pH (mV) and temperature,
electrode condition and the buffers used for calibration will be stored.
The “MEMORIZE” tag blinks and the display remains frozen until the
MEM key is pressed again.
ORP MEASUREMENTS
To perform ORP measurements, connect an optional ORP electrode
(see “Accessories“ section) to the meter and turn it ON.
If necessary, enter the “mV” mode by pressing RANGE.
Submerse the ORP electrode 3 cm (1¼”) into the sample to be tested
and wait for the reading to stabilize.
Measurements within the ±699.9 mV range are displayed with 0.1 mV
resolution, while outside this range the resolution is 1 mV.
The ATC (or MTC) key is turned off because the mV readings are not
temperature compensated.
For accurate ORP measurements, the surface of the electrode must be
clean and smooth. Pretreatment solutions are available to condition
the electrode and improve the response time (see “Accessories“section).
Notes:
•When the reading is out of range, the display will flash the closest
full-scale value.
•If using a pH electrode while in mV mode, the meter will measure
the mV generated by the pH electrode.

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Note: While in MEM mode, the user can switch between pH and mV
by pressing the RANGE key.
A stored value can be recalled by pressing MR: the display will show
the memorized reading and the “RECALL MEMORIZED” tag, as
long as the MR key is pressed.
Note: MR will only display the range that was active when MEM was
pressed.
BACKLIGHT FEATURE
The meter is provided with a Backlight feature,
which can be easily accessed through the LIGHT
key.
Note: The backlight automatically shuts off after approximately 1 minute
of nonuse.

10
pp
pp
pH CALIBRATIONH CALIBRATION
H CALIBRATIONH CALIBRATION
H CALIBRATION
It is recommended to calibrate the instrument frequently, 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.
•When extreme accuracy is required.
•When the calibration time-out is expired (if feature is enabled).
PROCEDURE
The meter offers a choice of 7 memorized buffers (1.68, 4.01, 6.86,
7.01, 9.18, 10.01 and 12.45 pH) and two user defined values, C1
and C2 (see “Custom Buffer Selection” section on page 12 for details).
•Pour a small quantity of selected buffer solutions into clean beakers.
For accurate calibration use two beakers for each buffer solution, the
first one for rinsing the electrode and the second one for calibration.
•Remove the protective cap and rinse the electrode with some of
the buffer solution to be used for the first calibration point.
TWO-POINT CALIBRATION
•Press the CAL key. The “CAL” and “ ” indicators will be
displayed. The secondary LCD will display buffer “7.01”. If a
different calibration buffer is desired (e.g. “6.86”), use the
ARROW keys to change the displayed value.
•Submerse the electrode approximately 3 cm (1¼”) into the
solution, place the temperature probe as close as possible to the
electrode and stir gently.
•The LCD will flash “WAIT NOT
READY” for 12 seconds, then:
if the reading is not close to the
selected buffer, “WRONG “ and
“WRONG ” will blink alternatively;
if it is close to the selected buffer the
meter will advise the user with an