Hanna Instruments HI 991003 User manual

HI991003
Extended Range Waterproof
pH, ORP & Temperature Meter
INSTRUCTION MANUAL

Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before
using this meter.
This manual will provide you with the necessary
information for correct use of this meter, 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] or view
our worldwide contact list at www.hannainst.com.
Dear
Customer,
All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner, Hanna
Instruments Inc., Woonsocket, Rhode Island, 02895, USA.

3
TABLE OF CONTENTS
Preliminary examination ...........................................
General description and Intended use ........................
Main features...........................................................
Specifications...........................................................
Display description ...................................................
Operational guide.....................................................
Meter setup..............................................................
Battery replacement..................................................
Accessories...............................................................
Electrode maintenance..............................................
Certification..............................................................
Recommendations for users.......................................
Warranty .................................................................
5
6
8
14
16
7
9
17
15
4
18
19
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4
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
Remove the instrument and accessories from the packaging
and examine it carefully to make sure that no damage
has occurred during shipping. Notify your nearest Hanna
Instruments Customer Service Center if damage is observed.
Each HI991003 is delivered in a rugged carrying case and
is supplied with:
• HI12973 pH/ORP/temperature probe with titanium
body, DIN connector and 1m (3.3’) cable
• HI70004 pH 4.01 buffer (1 sachet)
• HI70007 pH 7.01 buffer (1 sachet)
• HI700601 pH and ORP electrode cleaning solution
(2 sachets)
• 100 mL beaker (1 pc.)
• 1.5V AAA alkaline batteries
• Instrument quality certificate
• Electrode quality certificate
• Instruction manual
Note: Save all packing material until you are sure that
the instrument works correctly. Any damaged or defective
item must be returned in its original packing material
with the supplied accessories.

5
GENERAL DESCRIPTION AND INTENDED USE
The HI991003 portable pH and ORP meter together with
HI12973 pH electrode is designed to measure pH and ORP
in manufacturing and environmental testing protocols.
The HI991003 is a lightweight, portable meter. It features
a two button operation system and is simple to use. It has
a waterproof and compact casing, large three‑line display,
and automatic pH calibration at one or two points.
The HI12973 pH/ORP probe has a built‑in temperature
probe and preamplifer to provide stable measurements
in electrically noisy environments. The pH sensor has a
cylindrically shaped tip and uses a single junction gel filled
Ag/AgCl reference with a cloth junction. The ORP sensor
is made of platinum and uses the same reference. ORP
voltages are referenced to the Ag/AgCl reference with 3.5M
KCl activity.
GENERAL DESCRIPTION AND INTENDED USE

6
MAIN FEATURES
• Simultaneous pH, ORP and temperature measurements
on a large three‑line LCD display
• Automatic pH calibration at one or two points within
two memorized buffer sets (standard or NIST)
• Selectable temperature unit (°C or °F)
• Electrode condition indicator
• mV of pH measurement for electrode check
• HI12973 dedicated pH/ORP probe with integrated
temperature sensor
• Probe quick connect system
• Battery life indication and low battery detection
• Keystroke confirmation tone
• Auto‑off function
• Waterproof casing IP67
MAIN FEATURES

7
SPECIFICATIONS
Range*
‑2.00 to 16.00 pH / ‑2.0 to 16.0 pH
±825 mV (pH‑mV)
±1999 mV (ORP)
‑5.0 to 105.0 °C / 23.0 to 221.0 °F
Resolution
0.01 pH / 0.1 pH
1 mV
0.1 °C / 0.1 °F
Accuracy
@ 25°C / 77°F
±0.02 pH / ±0.1 pH
±1 mV (pH‑mV)
±2 mV (ORP)
±0.5 °C up to 60 °C; ±1.0 °C outside
±1.0 °F up to 140 °F; ±2.0 °F outside
Temperature
compensation
Automatic ‑5.0 to 105.0 °C/23.0 to
221.0 °F
pH calibration
Automatic, 1 or 2 point selectable buffer
set Standard (4.01, 7.01, 10.01) or
NIST (4.01, 6.86, 9.18)
Probe (included)
HI12973 preamplified pH, ORP and
temperature probe with cloth junction,
DIN connector and 1 m (3.3’) cable
Battery type/life 1.5V AAA (3 pcs.) approx. 1400 hours
of continuous use
Auto‑off user selectable: after 8 min, 60 min or
disabled
Environment 0 to 50 °C (32 to 122 °F)
RH max. 100%
Meter dimensions 154 x 63 x 30 mm (6.1 x 2.5 x 1.2”)
Weight
(with batteries) 196 g (6.91 oz.)
Case ingress
protection rating IP67
* the HI12973 is limited to be used from 0 to 13 pH and from
0 to 80°C temperature (32 to 176 °F).
SPECIFICATIONS

8
DISPLAY DESCRIPTION
1 pH calibration buffer(s) used
2 Stability indicator
3 Primary LCD
4 Battery percentage
5 Secondary LCD
6 Electrode condition indicator
7 Low battery indicator
8 Measurement unit
9 Automatic Temperature Compensation indicator
10 Tertiary LCD
11 Temperature unit
12 Meter modes indicator
DISPLAY DESCRIPTION

9
OPERATIONAL GUIDE
OPERATIONAL GUIDE
Each meter is supplied with batteries. Before using the meter
for the first time, open the battery compartment and insert
batteries, observing the polarity (see “Battery Replacement“).
CONNECTING THE ELECTRODE
With the meter turned off, connect the HI12973 probe to the
DIN socket on the bottom of the meter by aligning the pins
and pushing in the plug firmly. Remove the protective cap
from the probe before taking any measurements.
TURNING THE METER ON
To turn the meter ON, press the button on
the front of the meter. If it does not turn on, make
sure that the batteries are properly installed in their place.
The meter is provided with an active acoustic signal when
a key is pressed.
At start‑up the meter displays all LCD segments for a few
seconds, followed by the percentage indication of the remaining
battery life, displaying “WAIT“ until electrode check is in
process then the meter enters the normal measurement mode.
Battery life
Measurement
mode
LCD
check up
→ →
→
Electrode
check
Note: The meter detects the presence and the type of the
probe at its input.
- If the probe is not connected the message “NO”
”PROBE“ appears alternatively on the tertiary LCD.
- If the probe is not compatible “WRONG” ”PROBE“
message appears alternatively on the tertiary LCD.
-CompatiblepH probes:HI12963, HI10483,HI12943.
If one of these probes are detected “NoORP“message
is displayed at start-up and “---“ message displayed on
the secondary LCD while in measurement mode.

10
OPERATIONAL GUIDE
- If the readings are out of range, the nearest range limits
are displayed blinking (e.g. -2.00 pH -5.0 °C).
SELECTING MEASUREMENT RANGE
While in measurement mode, press the SET button to select
pH or pH‑mV measurement on the first LCD line.
FREEZING MEASUREMENT VALUES
While in measurement mode, press and hold the SET
button until “HOLD“ appears on the tertiary LCD. The
“HOLD“ remains for 1 second and reading of pH, ORP
and temperature will be frozen on the LCD with“H” blinking.
→
Press any button to resume active measurements.
ENTERING CALIBRATION MODE
Press and hold the button until ”POWER” and tag
is replaced by “STD“ and tag. Release the button.
ENTERING SETUP MODE
Press and hold button until “STD“ and tag is
replaced by “SETUP“ and tag. Release the button.
TURNING THE METER OFF
Whileinmeasurement mode,pressthe button.”POWER”
and tag will appear. Release the button.
pH MEASUREMENT & CALIBRATION
Make sure the meter has been calibrated before use.
If the probe is dry, soak it in HI70300 storage solution for
30 minutes to reactivate it. If soiled, clean the electrode
by soaking in cleaning solution for
20 minutes, then rinse the tip and
soak in storage solution at least 30
minutes before use. Rinse the electrode
off well and shake off excess droplets.
Recalibrate before using.
Submerge the probe in the sample to be tested while stirring
it gently. Wait until the tag on the LCD disappears.

11
OPERATIONAL GUIDE
The LCD displays the pH value (automatically compensated
for temperature) on the primary LCD, the ORP value
on the secondary LCD, while the tertiary LCD line
displays the sample temperature. If measurements are
taken in different samples successively, rinse the probe tip
thoroughly in distilled or deionized water to eliminate cross‑
contamination. For better accuracy, frequent calibration of
the pH sensor with the meter is recommended. In addition,
the meter must be recalibrated:
a) whenever the pH electrode is replaced.
b) after testing aggressive chemicals.
c) when high accuracy is required.
d) at least once a month.
e) after cleaning the sensor.
pH calibration
Enter calibration mode while in pH
measurement mode. Place the sensor
into the first calibration buffer. If
performing a two‑point calibration,
use pH 7.01 (pH 6.86 for NIST) buffer
first. The meter will enter the calibration mode, displaying
“pH 7.01 USE” and tag blinking (or “pH 6.86
USE” for NIST).
Follow directions for single and two‑point calibration below:
Single-point calibration
1. Place the probe in any buffer from the selected buffer
set. The meter will automatically recognize the buffer value.
2. If the buffer is not recognized or the calibration offset
is out of the accepted range “---- WRONG“ is displayed.
3. If the buffer is recognized “REC“ is displayed then
“WAIT“ until the calibration is accepted.
If using pH 7.01 (or pH 6.86 for NIST), after acceptance
of the buffer press any key to exit. The ”SAVE” message is
displayed and the meter returns to pH measurement mode.
If using pH 4.01 or 10.01 (or pH 9.18 for NIST) buffer the
”SAVE” message is displayed and the meter returns to
pH measurement mode.

12
OPERATIONAL GUIDE
Two-point calibration
Proceed with steps 1 through 3 under single‑point
calibration using 7.01 pH (pH 6.86 for NIST) buffer first.
Then follow steps below:
The ”pH 4.01 USE” message is then displayed.
Place the probe in the second calibration buffer (pH 4.01
or 10.01, or, if using NIST, pH 4.01 or 9.18). When the
second buffer is accepted, the LCD will display “SAVE”
for 1 second and the meter will return to the normal
measurement mode.
If the buffer is not recognized or the slope is out of accepted
range ”--- WRONG” is displayed. Change the buffer, clean
the electrode or press any key to exit calibration.
For better accuracy it is always recommended to carry out
a two‑point calibration.
After the calibration procedure has been completed, the
“CAL“ is turned on together with the calibrated points.
Exiting calibration and resetting default values
After entering the calibration mode and before the first point
is accepted, it is possible to quit the procedure and return
to the last calibration data by pressing the button. The
LCD displays “ESC“ for 1 second and the meter returns to
normal mode.
To reset the default values and clear a previous calibration,
press the SET button after entering the calibration mode
and before the first point is accepted.
The LCD displays “CLEAR“ for 1 second, the meter resets
to the default calibration and the “CAL“ with the calibrated
points on the LCD disappears.
ELECTRODE CONDITION
The display is provided with a probe icon (unless the
feature is disabled from setup) which indicates the electrode
status after calibration. The “condition” remains active for
12 hours (unless the batteries are removed).
The electrode condition is evaluated only if the current
calibration has two points.

13
OPERATIONAL GUIDE
5 bars: excellent condition
4 bars: very good condition
3 bars: good condition
2 bars: fair condition
1 bar: poor condition
1 bar blinking: very poor condition
With 1 bar it is recommended to clean the electrode and
recalibrate. If there is still only 1 bar or 1 bar blinking
replace the probe.
Sensor check
Setting the meter to pH‑mV range the user can check the
sensor status at any time. The offset value is the reading
in pH 7.01 buffer (@ 25 °C/77 °F). If this reading is
outside the range ±30 mV, the electrode is considered
“very poor”. The slope value of the sensor is the difference
between readings in pH 7.01 and in pH 4.01 buffers. When
the slope reaches the value of about 150 mV, the electrode
is considered “very poor“. When “poor“ or “very poor“, it
is recommended to replace it with a new one.
Note: To ensure reliable readings, the electrode must
be cleaned with cleaning solution and then hydrated in
storage solution for a minimum of 30 minutes before
calibrating the probe.
ORP MEASUREMENT
Place the probe into the sample to be tested, stir gently
and wait until the tag on the LCD is turned off. The
meter will show the ORP (mV) value on the secondary LCD
together with the pH of the solution (first LCD line) and the
temperature of the sample (third LCD line).
Notes: ‑The ORP range is factory calibrated and cannot
be calibrated by the user. HI7021L ORP solution can
be used to confirm ORP sensor is reading correctly.
‑mV readings are not temperature compensated.

14
METER SETUP
Setup mode allows the selection of the Temperature unit,
Auto‑off, Beep confirmation tone, the type of pH buffer set,
the pH Resolution and Information. To enter Setup mode
press and hold button until “STD“ and tag is
replaced by “SETUP“ and tag. Release the button.
• “TEMP“ is displayed on the third
LCD line with the current temperature
unit (e.g. “TEMP °C“), for °C/°F
selection, use the SET button. After
the temperature unit has been
selected, press to confirm and to enter the “A-OFF“
selection.
• Use the SET button, to navigate
through the auto‑off choices: 8
minutes (“8”, default value), 60
minutes (“60”) or disabled (“---”).
Press to confirm and to enter the
“BEEP“ selection.
• To switch the beep tone ON or OFF,
press the SET button; press to
confirm and to enter the calibration
buffer selection “pH 7.01 BUFF“.
• To change the buffer set, the meter
will show the current buffer set: “pH
7.01 BUFF” (for standard buffer
set: 4.01/7.01/10.01) or “pH
6.86 BUFF” (for NIST buffer set:
4.01/6.86/9.18). Change the set with the SET button.
Press to confirm and to enter pH resolution selection
“RESOL“.
• To change the pH measurement
resolution between “0.1“ and
“0.01“ use the SET button; then
press to confirm and to enter
electrode calibration information
“INFO“ selection.
METER SETUP

15
METER SETUP
BATTERY REPLACEMENT
When the remaining battery life is less
than 10% the battery tag blinks on the
display to warn the user.
Battery Error Prevention System (BEPS)
If the battery is too weak (“0%”) the display shows “bAtt“,
“DEAD“ for a few seconds then the meter powers off.
Immediately replace the batteries with new ones.
The batteries are accessed by opening the battery cover
on the back of the instrument. Remove protective boot
if present.
Replace the three 1.5V AAA alkaline batteries located in
the battery compartment, observing the indicated polarity.
Replace the battery cover making sure that the gasket is
in place.
BATTERY REPLACEMENT
• To switch the electrode condition
indicator on the LCD ON or OFF, press
the SET button; press to exit setup
options. Change the set with the SET
button, then press to confirm and
to return to normal mode.

16
ACCESSORIES
HI12973
Combination preamplified pH/ORP/
temperature probe with cloth junction, DIN
connector and 1 m (3.3’) cable
HI7004L pH 4.01 buffer solution, 500 mL
HI7006L pH 6.86 buffer solution, 500 mL
HI7007L pH 7.01 buffer solution, 500 mL
HI7009LpH 9.18 buffer solution, 500 mL
HI7010L pH 10.01 buffer solution, 500 mL
HI7021L ORP 240mV test solution, 500 mL
HI70300L Storage solution for pH and ORP electrodes,
500 mL
HI700601P pH and ORP electrode cleaning solution,
20 mL sachet, 25 pcs.
HI710028 Orange silicon rubber boot
HI710142 Black carrying case for HI991XX portable
instruments
HI77400P Calibration kit (pH 4.01 and pH 7.01,
20 mL sachets, 5 pcs. each)
ACCESSORIES
Code and serial
number on the
other side
pH tip
Reference junction
ORP sensor
Quick connector with
Rubber protection, and
1 meter cable
Temperature sensor

17
ELECTRODE MAINTENANCE
PREPARATION
• Remove the protective cap. Do not be alarmed if any
salt deposits are present. Rinse with water.
• Shake the electrode down as you would do with a
clinical thermometer to eliminate any air bubbles inside
the glass tip.
• If the glass tip and/or junction are dry, soak the
electrode in HI70300 storage solution for a minimum
of 30 minutes.
• Rinse with water.
• Calibrate before using.
STORAGE
• To ensure a quick response, the glass tip and the junction
should be kept moist and not allowed to dry.
• Replace protective cap with a few drops of HI70300
storage solution.
• Follow PREPARATION above before taking measurements.
Note: Never store the electrode in distilled water.
PERIODIC MAINTENANCE
• Inspect the electrode for any scratches or cracks. If any
present, replace the electrode.
• Rinse off any salt deposits with water.
• Follow the STORAGE procedure above.
• If the junction becomes discolored, extract a fresh 1/8”
section and trim off the soiled part.
CLEANING PROCEDURE
• Soak in Hanna HI700601 pH and ORP electrode cleaning
solution for 20 minutes. Rinse with water.
• Soak the electrode in HI70300 storage solution for a
minimum of 30 minutes. Rinse with water. Calibrate
before using.
TROUBLESHOOTING
• pH Meter: Follow the meter’s operating and calibration
procedures.
• Electrode: Evaluate your electrode performance based on
the Sensor check procedure on page 13.
ELECTRODE MAINTENANCE

18
MAN991003 12/18
CERTIFICATION
All Hanna Instruments conform to the CE European Directives.
RoHS
complian
t
Disposal of Electrical & Electronic Equipment. The
product should not be treated as household waste. Instead
hand it over to the appropriate collection point for the
recycling of electrical and electronic equipment which will
conserve natural resources.
Disposal of waste batteries. This product contains
batteries, do not dispose of them with other household
waste. Hand them over to the appropriate collection point
for recycling.
Ensuring proper product and battery disposal prevents
potential negative consequences for the environment and
human health. For more information, contact your city,
your local household waste disposal service, the place of
purchase or go to www.hannainst.com.
CERTIFICATION

HI991003 is warranted for two years against
defects in workmanship and materials when used
for its intended purpose and maintained according
to instructions. Electrodes and probes are warranted
for a period of 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 your local Hanna
Instruments Office. If under warranty, report the
model number, date of purchase, serial number
(see engraved on the back of the meter) 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 meter 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 meter, make sure it is
properly packed for complete protection.
Warranty
Before using this product, make sure
it is entirely suitable for your specific
application and for the environment
in which it is used. Any variation
introduced by the user to the supplied
equipment may degrade the meter’s
performance. For yours and the meter’s
safety do not use or store the meter in
hazardous environments.
Recommendations
for users
Hanna Instruments reserves the right to modify the design,
construction or appearance of its products without advance notice.

Printed in ROMANIA
World
Headquarters
Hanna Instruments Inc.
Highland Industrial Park
584 Park East Drive
Woonsocket, RI 02895 USA
www.hannainst.com
MAN991003