Hanna Instruments OHI 98140 User manual

1
Calibration Check
pH/mV/Temperature
Meters
HI 98140 HI 98150
HI 98160
Instruction Manual
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

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Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the instruments.
This manual will provide you with the necessary information for correct
use of the instruments, as well as a precise idea of their versatility.
HI 98140, HI 98150 and HI 98160 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.
WARRANTY ........................................................................................................... 2
PRELIMINARY EXAMINATION ................................................................................. 3
GENERAL DESCRIPTION ......................................................................................... 3
FUNCTIONAL DESCRIPTION .................................................................................... 5
SPECIFICATIONS ................................................................................................... 7
OPERATIONAL GUIDE ............................................................................................. 8
pH CALIBRATION ................................................................................................. 11
pH BUFFER TEMPERATURE DEPENDENCE ............................................................ 16
RELATIVE mV CALIBRATION (HI 98150 &HI 98160) .............................................. 17
GOOD LABORATORY PRACTICE (GLP) ..................................................................... 18
SETUP ................................................................................................................ 21
LOGGING ............................................................................................................. 23
AutoEnd ............................................................................................................. 25
TEMPERATURE CALIBRATION (for technical personnel only) .................................. 26
mV CALIBRATION (HI 98160 only) (for technical personnel only) .......................... 27
PC INTERFACE ..................................................................................................... 28
BATTERIES REPLACEMENT .................................................................................... 33
LCD MESSAGE GUIDE ........................................................................................... 34
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ....................................... 36
ELECTRODE CONDITIONING & MAINTENANCE ....................................................... 37
TROUBLESHOOTING GUIDE .................................................................................. 40
ACCESSORIES ..................................................................................................... 41
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS

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HI 98140, HI 98150 and HI 98160 are state-of-the-art, hand held pH
meters, designed to provide laboratory results and accuracy under harsh
industrial conditions.
These instruments are provided with a series of new diagnostic features
which add an entirely new dimension to the measurement of pH, by
allowing the user to dramatically improve the reliability of the measurement:
• 7 automatically recognized pH buffers (pH 1.68, 4.01, 6.86, 7.01,
9.18, 10.01 and 12.45) for calibration
• pH calibration up to three (HI 98140) and five (HI 98150 &
HI 98160) calibration points
• Custom calibration by entering up to two custom buffers
• Messages on the LCD to guide the user through instrument operation
• Diagnostic features to alert the user when the electrode needs cleaning
• Outside Calibration Range warning
• Monitoring of the electrode’s aging
• User-selectable “calibration time out” to remind the user when a
new calibration is necessary.
HI 98140 and HI 98150 works with SMART amplified electrodes. These
electrodes incorporate a chip, which stores the calibration data performed
with a specific instrument.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY 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.
Each instrument is supplied with:
•HI 1230B Non refillable Combination double-junction, pH Electrode
with gelled electrolyte (HI 98160)
•HI1618D Amplified pH electrode with built-in temperature sensor
and EEPROM and DIN connector. (HI 98140 & HI 98150)
•HI 7662 stainless steel Temperature Probe with 1 m (3.3') Cable
(HI 98160)
•pH 4.01 & 7.01 Buffer Solutions (20 mL each)
• 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.

4
When the SMART electrode is attached to the meter again, it is
automatically recognized. This technology allows the operator to
optimize time and efficiency with unsurpassed safety. It avoids erroneous
measurements taken in the event the pH electrode is substituted after
calibration. This series of electrodes also incorporates a temperature
sensor, eliminating the need for an additional temperature probe.
They also offer an extended temperature range from –20 ºC to 120 ºC
(–4 ºF to 248 ºF).
These instruments can also measure with ORP electrodes (HI 98150 &
HI 98160), thanks to their capability to measure mV with a resolution
up to 0.1 mV.
Other features include:
• Relative mV measurements (HI98150 & HI 98160)
• Log on demand (500 samples)
• Auto Hold feature, to freeze first stable reading on the LCD
• GLP feature, to view last calibration data for pH, Rel mV
• PC interface
The Battery Error Preventing System (BEPS) detects when the batteries
become too weak to ensure reliable measurements.
The backlight feature is automatically disabled when batteries are
getting low and a clear indication is displayed to warn the user of this
condition. However, the meter continues to measure correctly even when
the low battery indication is displayed. The meter automatically switches
itself off when the batteries are too weak to support proper function.
In addition, the meters allow the user to enter an ID code to uniquely
identify the instrument.

5
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
HI 98140 & HI 98150
HI 98160

6
1) Liquid Crystal Display (LCD).
2) Range key, to select pH or mV range (HI 98150 & HI 98160
only).
Setup key, to enter/exit SETUP mode.
3) On/Off key, to turn the instrument ON and OFF.
4) CAL key, to enter/exit calibration mode.
GLP key, to display Good Laboratory Practice information.
5) 2nd key, to select second key function.
6) key, to manually increase temperature or other parameters.
Mode key, to select measurement resolution, 0.1 pH / 0.01 pH,
or to toggle between mV and Rel mV (HI 98150 & HI 98160
only).
7) USB connector.
8) Battery compartment cap.
9) Temperature probe socket (HI 98160).
10) BNC electrode connector (HI 98160).
11) DIN connector for SMART electrode (HI 98140 & HI 98150).
12) key, to manually decrease temperature or other parameters.
RCL key, to enter/exit view logged data mode.
13) Log key, to store measured data.
CFM key, to confirm calibration point, confirm delete record or
confirm different set values.
14) AutoEnd key, to freeze first stable reading on the LCD.
CLR key, to clear calibration or enter delete logged data screen.
15) Light key, to toggle display backlighting.
16) Secondary LCD.
17) Primary LCD.

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SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS

8
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
INITIAL PREPARATION
The instrument is supplied complete with batteries. For placing the
batteries inside the meter, see page 33.
To prepare the instrument for use, connect the pH electrode to the input
socket on the top of the instrument. For HI 98160 connect the temperature
probe to the temperature socket too. The temperature probe is used in
conjunction with the pH electrode for pH temperature compensation, but
it can also be used independently to take temperature measurements. If
the probe is disconnected, temperature can be set manually with the
ARROW keys (see page 9 for details).
Turn the instrument ON by pressing
On/Off.
At start-up the display will show all
the available segments for a few seconds
(or while the button is held), followed
by the percentage indication of the
remaining battery life. The meter is
now ready to operate.
After measurement switch the instrument off, remove the electrodes,
clean the electrode and store it with a few drops of HI 70300 storage
solution in the protection cap.
Note: In order to avoid error conditions when working with SMART
electrodes, be sure the electrode is connected before the instrument
is turned ON and is disconnected only after the instrument is
turned OFF.
The auto-off feature turns the instrument off after a set period (default
20 min) to save battery life. To set another period or to disable this
feature, see SETUP menu on page 21.
The auto-off backlight feature turns the backlight off after a set period
(default 1 min). To set another period or to disable this feature, see
SETUP menu on page 21.
pH MEASUREMENTS
To take a pH measurement remove the electrode
protective cap and simply submerse the tip of the
electrode (3cm/1¼”) and the temperature probe
(HI 98160 only) into the sample to be tested. If
necessary, press Range until the display changes to
the pH mode. Allow the electrode to equilibrate and
reading to stabilize (hourglass symbol will turn off).
3cm
(1¼”)

9
The LCD will show the pH measurement
together with the temperature of the
sample. In order to take more accurate
pH measurements, make sure that the
electrode and instrument is calibrated (see
page 11 for details).
Hanna recommends to keep the pH electrode wet and to rinse throughly
with the sample before measurements.
The pH reading is directly affected by temperature. In order for the
instrument to measure the pH accurately, temperature must be taken
into consideration. If the sample temperature is different from the
ambient temperature, allow a few minutes for the pH electrode to reach
thermal equilibrium.
The HI 1618D pH sensor contains an integral temperature sensor so the
pH reading is automatically temperature compensated (ATC) on the
HI 98140 and HI 98150. If the temperature is out of range (due to
temperature sensor failure) these instruments will enter MTC mode and
permit temperature values to be set manually using the ARROW keys.
To use the instrument's Automatic Temperature Compensation feature for
HI 98160, connect and submerse the temperature probe into the sample
as close to the electrode as possible and wait for a few seconds.
If manual temperature compensation (MTC) is desired, the
temperature probe must be disconnected from the instrument
(HI 98160 only).
The display will show the default temperature
of 25 ºC, the last measured temperature
reading, or the last set temperature, with
the “ºC” (or “ºF”) tag blinking.
The “MTC” tag and arrow symbols
light up on the LCD to indicate that the
instrument is in MTC mode and the arrow
keys can be used to enter the desired temperature value.
Note: When in MTC the user can press and hold the ARROW keys to
set the measurement temperature. The instrument will start
incrementing/decrementing the temperature value. The instrument
keeps measuring using the MTC value for temperature compensated
pH and the display is updated.
ORP MEASUREMENTS (HI 98150 & HI 98160 only)
To perform ORP measurements, connect an optional
ORP electrode (see Accessories section) to the instrument
and turn it ON. If necessary, enter the mV mode by
pressing Range until the display changes to mV.
3cm
(1¼”)

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Submerse the ORP electrode tip (3cm/1¼”)
into the sample to be tested and wait a few
seconds 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.
The “ATC” (or “MTC”) tag is turned off because ORP measurements 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 its response time (see Accessories section, page 41).
RELATIVE mV MEASUREMENTS (HI 98150 & HI 98160 only)
To enter Relative mV mode, press 2nd then
Mode while in mV measurement mode. The
relative mV reading will be displayed on the
primary LCD and the current temperature
value on the secondary LCD.
Relative mV is an operation mode in which the
displayed electrode potential (mV) can be
changed by means of a calibration control
offset. See page 17.
TEMPERATURE MEASUREMENTS
The pH electrodes used for HI 98140 and HI 98150 also
include an integral temperature measuring element.
For HI 98160 connect the HI 7662 temperature probe to
the appropriate socket, submerse the temperature probe
into the sample and permit it to equilibrate by watching
the reading on the secondary LCD.
If the temperature is out of range, or the temperature probe is not
connected (HI 98160 only) the instruments will display the last in
range temperature reading and enter MTC mode (see page 9).
Note: The temperature can be displayed in Celsius degrees (ºC) or in
Fahrenheit degrees (ºF) (see SETUP for details, page 21).
BACKLIGHT FEATURE
The instrument is provided with a Backlight feature to
enhance display readability in low light conditions. It
can be easily toggled on and off through the keypad by
pressing Light.
Note: The backlight automatically shuts off after a set time period to
save battery life (see SETUP for details, page 21).
If battery percentage is less than 20% the backlight can not be ON.