Hanna Instruments Pool Line HI981914 User manual

INSTRUCTION MANUAL
HI981914
Professional Waterproof Portable
pH/ORP/ISE Meter

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.
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using this instrument.
This manual will provide you with the necessary information for correct use of this
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] or view our worldwide contact list at www.hannainst.com.
Dear
Customer,

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TABLE OF CONTENTS
TABLE OF CONTENTS
1. PRELIMINARY EXAMINATION ............................................................................................... 5
2. METER SPECIFICATIONS...................................................................................................... 6
3. HI72911B - PROBE SPECIFICATIONS................................................................................... 7
4. GENERAL DESCRIPTION....................................................................................................... 8
5. FUNCTIONAL DESCRIPTION.................................................................................................. 9
6. MAINTENANCE ................................................................................................................. 11
7. GENERAL OPERATIONS...................................................................................................... 13
7.1. BATTERY REPLACEMENT .......................................................................................... 13
7.2. CONNECTING THE PROBE......................................................................................... 14
7.3. TURNING THE METER ON......................................................................................... 14
7.4. BACKLIGHT FEATURE............................................................................................... 14
8. METER SETUP .................................................................................................................. 15
8.1. GENERAL PARAMETER SCREENS............................................................................... 16
8.2. PROBE SPECIFIC PARAMETERS................................................................................. 20
9. CALIBRATION ................................................................................................................... 23
9.1. pH CALIBRATION..................................................................................................... 23
9.2. pH BUFFER TEMPERATURE DEPENDENCE.................................................................. 30
9.3. RELATIVE mV CALIBRATION ..................................................................................... 31
9.4. ISE CALIBRATION.................................................................................................... 31
10. TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS.................................................... 35
11. mV & TEMPERATURE CALIBRATION (for technical personnel only)....................................... 36
12. MEASUREMENT.............................................................................................................. 38
12.1. pH MEASUREMENT............................................................................................... 38
12.2. ORP MEASUREMENT............................................................................................. 39
12.3. RELATIVE mV MEASUREMENT................................................................................ 39
12.4. ISE MEASUREMENT .............................................................................................. 40
12.5. TEMPERATURE MEASUREMENT.............................................................................. 40
13. GOOD LABORATORY PRACTICE (GLP)................................................................................. 41
14. LOGGING........................................................................................................................ 42
14.1. LOGGING THE CURRENT DATA ................................................................................ 42
14.2. VIEW LOGGED DATA .............................................................................................. 42
14.3. AUTOEND............................................................................................................. 42

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TABLE OF CONTENTS
15. PC CONNECTION............................................................................................................. 43
15.1. HI92000 – HANNA PC SOFTWARE......................................................................... 43
15.2. REMOTE CONNECTION VIA USB CABLE.................................................................... 43
16. TROUBLESHOOTING GUIDE ............................................................................................. 48
17. ACCESSORIES................................................................................................................. 49
CERTIFICATION...................................................................................................................... 53
RECOMMENDATIONS FOR USERS............................................................................................ 53
WARRANTY ........................................................................................................................... 54

5
PRELIMINARY EXAMINATION
1. PRELIMINARY EXAMINATION
Remove the instrument and accessories from the packaging and examine it carefully. For further
assistance, please contact your local Hanna Instruments Office or email us at [email protected].
HI981914 is delivered in a rugged carrying case and is supplied with:
• HI72911B pH electrode with built-in temperature sensor
• HI7662 Temperature probe
• pH 4.01 & 7.01 buffer solutions (230 mL each)
• HI7006014 General purpose cleaning solution (3 pcs.)
• 100 mL plastic beaker (2 pcs.)
• 1.5V AA batteries (4 pcs.)
• HI920015 Micro USB cable
• Instrument 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.

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METER SPECIFICATIONS
2. METER SPECIFICATIONS
pH
Range -2.0 to 20.0 pH / -2.00 to 20.00 pH / -2.000 to 20.000 pH
Resolution 0.1 pH / 0.01 pH / 0.001 pH
Accuracy ±0.1 pH / ±0.01 pH / ±0.002 pH
mV
Range ±2000 mV
Resolution 0.1 mV
Accuracy ±0.2 mV
ISE
Range From 1.00 E-7 to 9.99 E10 concentration
Resolution 3 digits 0.01, 0.1, 1, 10 concentration
Accuracy ±0.5% of reading (monovalent ions)
±1% of reading (divalent ions)
Temperature -20.0 to 120.0 °C (-4.0 to 248.0 °F)
Rel mV Offset Range ±2000 mV
pH Calibration Up to five point calibration using seven standards
(pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45), and five custom buffers
Slope Calibration From 80 to 110%
ISE Calibration Up to five point calibration points using six standard solutions
(0.1, 1, 10, 100, 1000, 10000 ppm)
Temperature Compensation Manual or Automatic from -20.0 to 120.0 °C (-4.0 to 248.0 °F)
pH Electrode HI72911B pH & temperature
Logging Memory 300 records, log-on-demand (100 records per range)
Input Impedance 10¹² Ω
Battery Type/Life 1.5V AA batteries / approximately 200 hours of continuous use
without backlight (50 hours with backlight)
Auto Power Off 5, 10, 30, 60 minutes or disabled
PC Interface Opto-isolated USB
Dimensions 185 x 93 x 35.2 mm (7.3 x 3.6 x 1.4”)
Weight 400 g (14.2 oz)
Environment 0 to 50 °C (32 to 122 °F) max. RH 100% IP67

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HI72911B - PROBE SPECIFICATIONS
3. HI72911B - PROBE SPECIFICATIONS
pH Range 0 to 13 pH
Reference Double, Ag/AgCl
Junction PTFE
Electrolyte Polymer
Maximum Pressure 3.0 bar
Operating Temperature 0 to 80 °C (32 to 176 °F)
Body Material Titanium
Glass Type GP (General Purpose)
Tip / Shape Flat
Body Length / Overall Length 110 mm / 150.5 mm
Temperature Sensor Yes
Outer Diameter 14 mm
Cable Coaxial, 1 m (3.3’) long
Connector Type BNC + phono

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GENERAL DESCRIPTION
4. GENERAL DESCRIPTION
HI981914 is a heavy-duty, portable pH/ORP/ISE meter with the features of a benchtop meter, part
of Hanna Instruments pool-line family.
The pH probe can be exchanged out for an ORP probe to obtain mV readings in the ±2000 mV
range. HI981914 adds direct ion concentration readings for ISEs with a choice of units for calibration
and display.
Main features
• Seven standard buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45) for calibration
• pH calibration up to five calibration points
• Custom calibration with up to five custom buffers
• Messages on the graphic LCD for an easy and accurate calibration
• CAL Check®diagnostic features to alert the user when the electrode needs cleaning
• Optional, user enabled, “Outside Calibration Range” warning
• Monitoring of electrode condition
• User selectable “Calibration Time Out”
• Temperature range from -20 to 120 °C (-4 to 248 °F) using the integrated temperature sensor
Other features
• Relative mV measurements
• Log on demand up to 300 samples (100 samples per range)
• Auto Hold feature, to freeze first stable reading on the LCD
• GLP feature, to view last calibration data for pH, Rel mV, or ISE
• PC interface

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FUNCTIONAL DESCRIPTION
5. FUNCTIONAL DESCRIPTION
Front View
1. Liquid Crystal Display (LCD)
2. Functional keys, press to perform the function displayed above them on the screen
3. / keys, press to scroll the displayed options and messages
4. Power ( ) ON/OFF key, press to turn the instrument on and off
5. LIGHT ( ) key, press to turn the backlight on and off
6. GLP key, press to display stored calibration data
7. CAL key, press to enter or exit calibration mode
8. SETUP key, press to enter or exit setup mode
9. RCL key, press to enter or exit view logged data
10. MODE key press to change pH resolution or to toggle between mV and Rel mV mode
11. RANGE key, press to switch between pH, mV and ISE range
12. HELP key, press to display the context sensitive help menu
13. ESC key, press to return to the previous screen
14. Soft key functions defined on display
15. Temperature compensation status
16. Battery level indicator

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FUNCTIONAL DESCRIPTION
Top View
1. Input for temperature probe
2. USB connector
3. BNC electrode connector
4. Input for reference electrode

11
MAINTENANCE
6. MAINTENANCE
Electrode Care & Maintenance
Proper care and maintenance of the pH probe is essential for accurate readings. Cleaning, calibrating,
and appropriate storage will extend the life of the probe.
Remove the electrode protective cap. Do not be alarmed if any salt deposits are present, this is normal.
Rinse the probe with water.
Shake the electrode down as you would do with a clinical thermometer to eliminate any air bubbles
inside the glass bulb (pH electrode only).
If the bulb and/or junction are dry, soak the electrode in HI703004 or HI80300 Storage solution for
a minimum of 30 minutes. Rinse with water.
Calibrate before using.
When the electrode is not in use, add a few drops of HI703004 Storage solution to the protective cap
and replace the cap. To ensure a quick response, the glass bulb (pH electrode) and the junction should
be kept moist and not allowed to dry out.
Note: Never store the electrode in distilled or deionized water.
Refillable electrodes
If the electrolyte is more than 2 1/2 cm (1”) below the fill hole, add HI7082 or HI8082 3.5M KCl
Electrolyte Solution (double junction) or HI7071 or HI8071 3.5M KCl+AgCl Electrolyte Solution
(single junction electrodes).
For faster response, unscrew the fill hole screw during measurements.
AmpHel®electrodes
If the electrode does not respond to pH changes, the battery is depleted and the electrode should be
replaced.
General Maintenance
After prolonged storage or cleaning, calibration is required.
After use, rinse the probe with tap water and dry it. The pH electrode bulb must be kept moist.
Inspect the electrode and connection cable for scratches or cracks. The cable insulation and electrode
bulb must be intact.
Rinse the sensor in flowing water then clean by soaking it for 1 minute in HI70670 Cleaning solution
for mineral deposits or HI70671 Cleaning & disinfection solution for algae, fungi and bacteria.
After cleaning, soak the sensor in HI703004 Storage solution for 30 minutes before calibrating.
pH refillable probes
Refill the reference chamber with fresh electrolyte (HI7071 or HI8071 for single junction or HI7082 or
HI8082 for double junction electrodes). Allow the electrode to stand upright for 1 hour.

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MAINTENANCE
pH Cleaning Procedure
• General cleaning: soak in HI70614 or HI8061 General cleaning solution for approximately ½ hour.
• Protein cleaning: soak in HI7073 or HI8073 Protein cleaning solution for 15 minutes.
• Inorganic cleaning: soak in HI7074 Inorganic cleaning solution for 15 minutes.
• Oil or grease cleaning: rinse with HI70774 or HI8077 Oil and Fat Cleaning Solution.
Important: After performing any of the cleaning procedures, rinse the electrode thoroughly with
distilled water, refill the reference chamber with fresh electrolyte (not necessary for gel-filled
electrodes) and soak the electrode in HI703004 or HI80300 Storage Solution for at least
1 hour before taking measurements.
*Not present in gel electrodes.

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GENERAL OPERATIONS
7. GENERAL OPERATIONS
7.1. BATTERY REPLACEMENT
To replace the batteries, follow the next steps:
• Turn OFF the instrument.
• Open the battery compartment by removing the four screws from the back of the instrument.
• Remove the old batteries.
• Insert four new 1.5V AA batteries in the battery compartment while paying attention to the correct
polarity.
• Close the battery compartment using the four screws.
If the battery capacity is less than 20% the serial communication and the backlight feature are not
available.
Note: The instrument is provided with the BEPS (Battery Error Prevention System) feature,
which automatically turns the instrument off when the batteries level is too low to ensure reliable
readings.

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GENERAL OPERATIONS
7.2. CONNECTING THE PROBE
To prepare the instrument for field measurements close the serial communication socket and all unused
connector sockets with proper stopper (to ensure waterproof protection). Use the holed temperature
rubber cork for the temperature socket when temperature probe is connected.
Connect the pH electrode and the temperature probe to the BNC and temperature sockets on the top of
the instrument. Push the pH electrode sleeve to cover the connector accommodation.
The temperature probe is used in conjunction with the pH electrode to utilize the instrument’s ATC
capability, but it can also be used independently to take temperature measurements. If the probe is
disconnected, temperature can be set manually with the / keys.
7.3. TURNING THE METER ON
Turn the instrument ON by pressing ON/OFF key.
At start-up the display will show the Hanna Instruments logo for a few seconds followed by the
percentage indication of the remaining battery life, then enters the measurement mode.
7.4. BACKLIGHT FEATURE
The instrument is provided with a Backlight feature. Press LIGHT to switch the backlight on/off.
Note: The backlight automatically shuts off after a set period (see METER SETUP section for
details).

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METER SETUP
8. METER SETUP
The general SETUP menu items with options and default values are detailed here:
Description Option Default
Backlight Backlight level 0 to 7 4
Contrast Contrast level 0 to 20 10
Auto light off Time until backlight is ON 1, 5, 10, 30 min. 1
Auto power off Time after the instrument is
powered OFF
Disabled
5, 10, 30, 60 min. 30
Date/Time day, month, year
00:00 to 23:59
current
date/time
Time Format AM/PM or 24 hours 24 hours
Date Format
DD/MM/YYYY
MM/DD/YYYY
YYYY/MM/DD
YYYY-MM-DD
Mon DD, YYYY
DD-Mon-YYYY
YYYY-Mon-DD
YYYY/MM/DD
Language Message display language Up to four languages English
Temperature unit °C or °F °C
Beep ON Beeper Status Enabled or Disabled Disabled
Instrument ID Instrument Identification 0000 to 9999 0000
Baud RAte Serial Communication 600, 1200, 2400, 4800,
9600 9600
Meter information Displays general information – –

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METER SETUP
The probe specific SETUP menu items are detailed here:
Item Description Option Default
Calibration Timeout
(pH & ISE)
Number of days after
Calibration warning is
displayed
Disable, 1 to 7 days Disable
First point mode (pH) Management of
1 point calibration Replace or offset Replace
Custom buffer (pH) Custom buffer setting Max. 5 buffers No
View calibration points
(pH)
Display calibration
points Enable or disabled Enable
Out of Cal. Range Warning – Enable or disabled Enable
ISE probe Type of ISE probe Custom or Standard (17) Fluoride
ISE unit –
User, ppt, g/L, ppm, mg/L,
ppb, µg/L, mg/mL, M,
mol/L, mmol/L, % W/V
ppm
8.1. GENERAL PARAMETER SCREENS
Backlight
Option: 0 to 7
This function allows the adjustment of the LCD backlight intensity.
With item selected press Modify functional key and use the arrow keys to change the backlight
intensity.
Press Accept to save or press ESC key return to the Meter Setup menu.

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METER SETUP
Contrast
Option: 0 to 20
This function allows the adjustment of the LCD contrast.
With item selected, press Modify functional key. Press the arrow keys to increase or decrease the
contrast.
Press Accept to save or press ESC key to return to the Meter Setup menu.
Auto Light Off
Option: 1, 5, 10 or 30 minutes
This function allows modifying the light auto-off time.
With item selected, press the functional key to select desired option.
Auto Power Off
Option: 1, 5, 10, 30 minutes or disabled
This function allows modifying the automatic power off time.
With item selected, press Modify functional key. Press the / keys to select desired option.
Press Accept to save or ESC key to return to the Meter Setup menu.
Date / Time
Option: YYYY/MM/DD, Hours/Minutes/Seconds
With item selected, press Modify functional key. Press the / keys to select desired option.
Press the functional arrow keys to select year, month, day, hour, minute, and seconds.

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METER SETUP
Time Format
Option: AM/PM or 24 hours
With item selected, press the functional key to select desired option.
Date Format
Option: DD/MM/YYYY; MM/DD/YYYY; YYYY/MM/DD; YYYY-MM-DD; Mon, DD, YYYY;
DO-Mon-YYYY; YYYY-Mon-DD
With item selected, press Modify functional key. Press the / keys to select desired option. Press
Accept to save or ESC key to return to the Meter Setup menu.
Language
Option: English, Italiano, Español, Portugues
With item selected, press the functional key to select desired option.
If one of the options can not be selected, the instrument works in “safe mode” whereby all messages
are displayed in English and Help is not available.
Temperature Unit
Option: °C or °F
With item selected, press the functional key to select desired option.

19
METER SETUP
Beep On
Option: Enable or Disable
With item selected, press the functional key to select desired option.
When enabled, a short beep is heard every time a key is pressed or the calibration can be confirmed.
A long beep alert sounds when the pressed key is not active or wrong condition is detected during
calibration.
Instrument ID
Option: 0000 to 9999
With item selected, press Modify functional key. Press the / keys to modify the value. Press
Accept to save or ESC key to return to the Meter Setup menu.
Baud Rate
Option: 600, 1200, 2400, 4800 or 9600
With item selected, press Modify functional key. Press the / keys to select desired option. Press
Accept to save or ESC key to return to the Meter Setup menu.
Meter Information
With item selected, press Select functional key. The instrument displayes: firmware version, language
version, mV and temperature factory calibration time and date, battery capacity.
Press ESC key to return to the Meter Setup menu.

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METER SETUP
8.2. PROBE SPECIFIC PARAMETERS
Calibration Timeout
Option: Disabled, 1 to 7 days
With item selected, press Modify functional key. Press the / keys to set desired option. Press
Accept to save or ESC key to return to the Meter Setup menu.
Note: If enabled, “CAL DUE” warning will be displayed after the selected time has elapsed.
First Point Mode
Option: Replace or Offset
With item selected, press the functional key to select desired option.
With “Replace”, the slopes between current buffer and nearest lower and higher buffers will be
reevaluated.
With “Offset”, an electrode offset correction is performed keeping unchanged the existing slopes.
Custom Buffers
Option: None, 1 to 5
With item selected, press Modify functional key.
Press Add to add a custom buffer to the list (maximum 5).
With a buffer highlighted, press Modify to edit custom buffer value. Press the / keys to change
the value. Press Accept to save or ESC key to return to the custom buffer list screen.
Press Delete to delete the selected custom buffer from the list.
Press ESC key to return to the Meter Setup menu.