Hanna Instruments HI 9124 User Manual
Instruction Manual
HI 9124 HI 9125
Portable Waterproof
pH Meters
www.hannainst.com
1
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.
WARRANTYWARRANTY
WARRANTY
WARRANTYWARRANTY
HI 9124 & HI 9125 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
these 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 these 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.
WARRANTY
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
WARRANTY .................................................................................. 2
PRELIMINARY EXAMINATION ......................................................... 3
GENERAL DESCRIPTION ................................................................. 3
LCD MESSAGE GUIDE .................................................................... 4
FUNCTIONAL DESCRIPTION ........................................................... 5
SPECIFICATIONS...........................................................................6
OPERATIONAL GUIDE.................................................................... 7
pH CALIBRATION ....................................................................... 10
pH BUFFER TEMPERATURE DEPENDENCE ....................................... 13
SETUP MENU ............................................................................. 14
mV CALIBRATION (HI 9125 only) ................................................ 15
TEMPERATURE CALIBRATION ....................................................... 15
BATTERIES REPLACEMENT ............................................................ 16
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ................ 18
ELECTRODE CONDITIONING & MAINTENANCE ................................ 19
TROUBLESHOOTING GUIDE ......................................................... 21
ACCESSORIES ............................................................................. 22
2
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
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 1230B non refillable combination double-junction pH electrode
with gelled electrolyte.
• HI 7662 stainless steel temperature probe with 1 m (3.3’’) cable
• pH 4.01 & pH 7.01 buffer solutions, 20 mL sachet
• 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.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
The HI 9124 and HI 9125 are state-of-the-art rugged waterproof,
hand held pH meters designed to provide laboratory results and
accuracy under harsh industrial conditions.
A large multi-level LCD, with clear indications related to the electrode
and instrument status, pH and temperature displayed simultaneously,
and user friendly symbols and text instructions during calibration.
The pH calibration procedure is automatic with 5 auto recognized
buffers (4.01, 6.86, 7.01, 9.18 and 10.01) and automatic temperature
compensation.
The HI 9125 can be used with ORP (Oxidation Reduction Potential)
electrodes. mV measurements automatically change from 0.1 to 1 mV
resolution when the reading reaches 700 mV.
3
LCD MESSAGE GUIDELCD MESSAGE GUIDE
LCD MESSAGE GUIDE
LCD MESSAGE GUIDELCD MESSAGE GUIDE
TAGS & SYMBOLS
• Mode tags lights up for indicating the corresponding active
mode, and blinks for warning the user.
MEASURE on: measurement mode.
SETUP on: SETUP menu mode has been entered.
CALIBRATION on: calibration mode has been entered.
MEMORIZE on: measurement stored in the internal memory and
frozen on the display
RECALL MEMORIZED on: stored value recalled.
• Battery symbol blinking: low battery condition. Batteries should
be replaced.
• Calibration messages.
WAIT NOT READY blinking: buffer has been recognized, but
reading is not stable.
READY on: buffer has been recognized and reading is stable.
WRONG and WRONG blinking alternatively: wrong
buffer, value not recognized.
• Main active key messages light up for indicating the
corresponding active key.
CFM blinking: ask for confirmation of calibration or set value.
MR on: MR key available.
MEM on: MEM key available.
CAL on: CAL key available.
RANGE on: RANGE key available. (HI 9125 only)
SETUP on: SETUP key available.
4
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
1) Liquid Crystal Display (LCD).
2) RANGE key, to select pH or mV (HI 9125 only).
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 key, to recall stored value from memory.
10) MEM key, to store reading in memory.
11)p and q keys, for manual temperature setting, or selecting
pH buffer value.
12) Secondary display.
13) Primary display.
5
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SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
6
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
INITIAL PREPARATION
The instrument is supplied with batteries. In order to place the
batteries inside the instrument follow the instructions from page 16.
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 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 the LCD segments and then the
battery percentage while the instrument performs a self check (or as
long as the button is held).
The meter automatically enters 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 batteries, the auto-off feature turns the meter off after
20 minutes with no button pressed. To disable this feature, see
“Setup Menu” section on page 14.
pH MEASUREMENTS
Calibrate the meter and pH electrode before
taking measurements. See page 10 for details.
To take a pH measurement remove the electrode’s
protective cap, rinse off pH sensing tip. 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 (HI 9125 only).
Allow time for the reading to stabilize.
7
3 cm
(1¼”)
The LCD will show the pH measurement and the temperature of the
sample.
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 value of the sample is directly affected by temperature. In
order for the meter to measure the pH accurately, the value must be
compensated for temperature. If the sample temperature is different
from the temperature at which the pH electrode was kept, allow a
few minutes for thermal equilibrium.
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 with the “°C” (or “°F”) indicator blinking.
The temperature can now be adjusted with the ARROW keys. Set the
value at the sample temperature.
Notes: • When the reading is out of
range, the display will flash
the closest full-scale value.
• If using pH electrode while
in mV mode, the meter will
measure the mV generated
by the pH electrode.
8
ORP MEASUREMENTS (HI 9125 only)
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 until the display
changes to mV.
Submerse the ORP electrode 3 cm (1¼”) into the sample to be tested
and wait a few minutes 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 automatically
switches to 1 mV.
For accurate ORP measurements, the surface of the electrode must be
clean and smooth. Pretreatment solutions are available to condition
the electrode and improve its response time (see “Accessories” section).
MEM & MR FUNCTIONS
The instrument allows the user to store the current measurement (pH
and temperature, or mV and temperature) into internal memory by
pressing the MEM key. The “MEMORIZE” tag lights up on display.
Stored values can be recalled by pressing MR: the display will show
the values and the “RECALL MEMORIZED” tag as long as the
button is pressed.
9
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