Hanna Instruments HI6221 User manual

Hanna Instruments Inc., 584 Park East Drive, Woonsocket, RI 02895 USA
www.hannainst.com
INSTRUCTION MANUAL
HI6221
Advanced pH and ORP
Benchtop Meter

TABLE OF CONTENTS
1. Preliminary Examination ............................. 3
2. Safety Measures ......................................... 3
3. User Interface – Icons ................................. 4
4. General Description & Intended Use ............. 6
4.1. Main Features .................................. 7
5. Specifications ............................................. 8
5.1. Instrument ....................................... 8
5.2. Electrodes ...................................... 10
6. Functional & LCD Description ..................... 11
6.1. Main Unit ...................................... 11
6.2. Electrodes ...................................... 13
7. Getting Started ......................................... 14
7.1. Attaching the Electrode arm ............. 14
7.2. Using the Electrode Holder .............. 15
7.3. Connecting Electrodes & Keyboard .... 15
7.4. Powering the Unit, Selecting Operating
Language & Regional Preferences ..... 16
7.5. Basic Operations ............................. 17
8. System Menu Items ................................. 17
8.1. Users ............................................. 18
8.2. System Settings .............................. 21
8.3. Measurement Settings ..................... 26
8.4. Log Recall ...................................... 29
8.5. Help .............................................. 35
9. Measurement & Electrode Setup Menu ....... 36
9.1. Calibration ..................................... 36
9.2. Reading ......................................... 38
9.3. Temperature ................................... 39
9.4. View .............................................. 41
9.5. Alarms ........................................... 43
9.6. Logging ......................................... 44
9.7. Profiles .......................................... 46
10. Calibration procedure .............................. 47
10.1. pH Calibration ............................... 48
10.2. Relative mV Calibration ................. 52
11. Measurement ......................................... 53
11.1. Measurement Tips ......................... 53
11.2. Direct Readings ............................ 54
11.3. Direct / Autohold Readings ............ 54
12. Logging ................................................. 55
12.1. Automatic Logging ........................ 56
12.2. Manual Logging ........................... 56
12.3. Autohold Logging ......................... 57
13. Maintenance & Conditioning ................... 57
14. Error Messages ....................................... 59
15. Accessories ............................................ 60
16. Abbreviations ......................................... 66
Certification .................................................. 67
Recommendations for Users ........................... 67
Warranty ...................................................... 67
Regulatory notices for the Wi-Fi Module .......... 68
Dear Customer,
Thank you for choosing a Hanna Instruments®product.
Please read this instruction manual carefully before using this instrument as it provides 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].
Visit www.hannainst.com for more information about Hanna Instruments and our products.
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. Hanna Instruments reserves the right to modify the design,
construction, or appearance of its products without advance notice.

3 Preliminary Examination
1. PRELIMINARY EXAMINATION
HI6221 is Hanna’s
®
advanced benchtop pH and ORP meter with a large touch screen display and streamlined design.
Each HI6221 is supplied with:
• HI1131B pH electrode
• HI7662-TW temperature probe
• pH calibration starter kit consisting of:
•pH 4.01 buffer solution (2 sachets)
•pH 7.01 buffer solution sachet (4 sachets)
•pH 10.01 buffer solution sachet (2 sachets)
• HI700601 electrode cleaning solution sachet (2 sachets)
• HI70300S storage solution for pH & ORP electrodes (25 mL)
• HI7082 3.5M KCl electrolyte solution (30 mL)
• HI764060 electrode holder with following accessories:
•base plate (with integrated pivot pin) and screw (requires installation)
•cable holder clip, attached
•electrode holder with adapter, attached
• Capillary pipette
• 24 VDC power adapter
• USB-C to USB-A cable
• Probe quality certificate
• Quick reference guide with instrument quality certificate
For ORP (redox) measurements a separate sensor is required. See Accessories section for available ORP models.
Note: Save all packing material until you are sure the instrument works correctly. Any damaged or defective item
must be returned in its original packing material with the supplied accessories.
2. SAFETY MEASURES
Handling and usage precautions
The unit, while not fragile, can be damaged by improper handling and usage.
• Transport the unit with all cables removed.
• Keep the unit on a stable and even surface, away from contact with liquid.
• Avoid excessive dirt and dust.
• Protect the unit from contact with food, oils, and chemicals.
• If the device becomes wet, gently wipe the exterior with a clean, dry cloth.
• Keep away from direct sunlight.
• Use in a safe place that is appropriate to application requirements.
• Use attachments and accessories specified in this manual only.
• Capacitive touchscreen and buttons – operate without applying pressure.
• Do not puncture the capacitive touchscreen or drop the unit.
• Do not use the device near heat sources.
• Do not place objects on top of the device.
• Do not insert objects into the ports, spaces around keys, other than the intended cable, USB drive.

User Interface – Icons 4
3. USER INTERFACE – ICONS
Capacitive keys Description
Back –return to a previous hierarchical menu level
Home – access to measurement screen & configured profile
Menu – access to Users, System Settings, Measurement Settings, Log Recall, Help
Main menu Description
Users – login & rights configuration
System Settings – system configuration, connectivity & printing items
Measurement Settings
Log Recall – access logged measurement data
?
Help – access support
Measurement Description
Measurement Menu, accessed from measurement screen
pH electrode (seen in full GLP view)
Autohold applied
pH / mV Autohold, waiting stable pH/mV measurement
/ Warning on standby / active function
Logging Description
/
# 00002
00:00:12 Start / Stop logging (current index and time since log start)
M
/
M
# 00012
Manual logging (current index)
DTriggers log session, pending next stable measurement
AAutohold logging in progress
/ Annotated text/Annotated text in use
0 % 25 % 50 %
75 % 100 %
Available storage capacity
(at full capacity the icon is displayed blinking)

5 User Interface – Icons
Log recall Description
/ Table view, function active/not selected
/ Graph view, function active/not selected
/ Information view, function active/not selected
General Description
Profile
Background operation in progress
Alarm enabled
Unstable
Stable
Autohold
Stability/Autohold indicator
Active buffer selection during manual or semiautomatic calibration
Forward/backward navigation, sequence of steps
(gray icon: function not available)
Calibration procedure, buffer selection, tutorial sequence of steps
(gray icon: function not available)
Connectivity & Printing Description
Ethernet
Connection established (tap for IP address)
0.5 sec. Connection in progress
Connection error
Wi-Fi
Connection established (tap for IP address)
0.5 sec. Connection in progress
Connection error
USB
USB-A or USB-C key plugged in
High-power consumption with key plugged in
PC
PC connection established through USB-C port
Printer
Printer connected - printing manual log option enabled
Printer connected - printing manual log option disabled
Printer not recognized or no longer connected

General Description & Intended Use 6
4. GENERAL DESCRIPTION & INTENDED USE
HI6221 is an advanced benchtop meter with a capacitive display, comprised of a housing and an integrated
pH/ORP measurement module. Compact and easy to operate, the meter is delivered with Hanna Instruments
HI1131B combination pH electrode and HI7662-TW temperature probe for pH measurement.
A separate ORP sensor is required for ORP measurements.
HI1131B is a glass body, double junction, refillable pH electrode with an indicating sensor made of high
temperature (HT) glass. The double junction reference and HT glass design allow the HI1131B to be used in
a wide variety of applications.
Probe connection to the unit is secured through a galvanically isolated BNC connection.
HI7662-TW stainless steel temperature probe allows the meter to perform automatic temperature compensation (ATC).
This system responds to a complex range of measurement and monitoring requirements, providing accuracy,
reproducibility, and reliability.
HI6221 is supplied with an electrode holder that has a flexible arm. The holder can be mounted quickly and
provides secure support for electrodes while taking measurements in sample containers.
This benchtop meter supports:
• USB type A – support for USB drive, printer, keyboard
• USB type C – support for USB drive, PC connection
The user can select between five different views.
• Basic measurement configuration
• Simple GLP with calibration information
• Full GLP with electrode status and calibration point details (pH only)
• Live updated, interactive graph
• Tabulated data with date, time, and notes
Capacitive touch screen with multi-touch support
The benchtop unit has a 7-inch color display with 800 x 480p resolution. The capacitive, multi-touch screen
supports video playback and data plotting.

7 General Description & Intended Use
4.1. MAIN FEATURES
Measurement & Calibration
• Measure pH/mV (pH) or mV/Rel.mV (ORP) with temperature
•
Application-specific profiles allow quick and direct measurement without the need to update the sensor
and system settings
• Active log during measurement
• Measurement stability indicator (using the Stability Criteria setting)
• Reading modes: direct and direct/autohold
• pH temperature compensation can be Automatic (using temperature probe) or set manually
• Audible and/or alarm messages for measurements outside predefined limits
• Galvanic isolation for pH/ORP measurement module
• 5-point pH calibration with automatic recognition for standard buffers (Hanna and NIST buffers)
• Choice of standard or custom buffers for calibration
• Non-volatile memory saves data and settings
Logging
• Data log collection of at least 1000000 data points (with time and date stamp)
• Logging types: manual, automatic, autohold
• Sample ID for manual and autohold data
Connectivity features & services
• Transfer logged data to a USB thumb drive
• Log files include measurements and calibration data (as .CSV file)
• FTP and email for log export via Ethernet and Wi-Fi connection
• Download logs using the benchtop’s embedded web server
• USB type A for USB drive, printer, and keyboard
• USB type C for USB drive and PC connection
User-support feature
• Help section – brief overview of instrument's main functionalities and features

Specications 8
5. SPECIFICATIONS
5.1. INSTRUMENT
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
(±1 last significant digit)
mV
Range
− 2000.0 mV to 2000.0 mV
Resolution 1 mV
0.1 mV
Accuracy ±0.2 mV ±1 last significant digit
Temperature
Range
− 20.0 to 120.0 °C
− 4.0 to 248.0 °F
253.2 to 393.2 K
Resolution 0.1 °C / 0.1 °F / 0.1 K
Accuracy ±0.2 °C / ±0.4 °F / ±0.2 K
Relative mV offset Range ±2000.0 mV
Reading
Modes Direct
Direct/Autohold
Stability criteria
Accurate
Medium
Fast
Isopotential
− 2.000 to 20.000 pH
Sampling rate 1000 ms
pH calibration
Calibration points Up to 5
Type
Automatic
Semiautomatic
Manual
Standard buffers Hanna and NIST
pH 1.68, 3.00, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45
Custom buffers Up to 5
Custom group Up to 5
1st calibration point Offset or Points (user setting)
Reminder
Daily: 0 min. to 23 hours and 59 min.
Periodic: 1 min. to 30 days, 23 hours and 59 min.
Disabled
*The range may be limited by the probe’s limits.

9 Specications
Temperature user calibration 1 point, adjustable
pH views
Basic
Measurement
pH: pH measurement and pH mV
mV: measurement
Rel.mV: measurement, Absolute mV
Temperature (ATC or MTC)
Measurement profile (when enabled)
Stability status
Simple GLP
Basic view information
pH last calibration date, electrode offset, average slope, and
electrode condition (for 24 hours after calibration)
Rel. mV: Last Calibration, Offset
Full GLP (pH only) Simple GLP information and calibration point details
Graph (Plot) pH, mV, Rel. mV and temperature versus time graph can be
panned or zoomed (pinch-to-zoom technology)
Table
Measurements updated every second are displayed in table.
With Manual logging type, configuration displays table of
logged data points.
pH temperature compensation Automatic or Manual
Logging
Type
Automatic
Manual
Autohold
Number of records 50000 maximum per file
Stores at least 1000 000 data points per user
Automatic interval 1, 2, 5, 10, 30 seconds
1, 2, 5, 10, 15, 30, 60, 120, 150, 180 minutes
Sample ID Incremental mode or manual
Export option .CSV file format
Users Up to 9 users and the default administrator account
Connectivity
USB-A 2 ports for keyboard and/or printer input or USB thumb drive
USB-C 1 port for PC connectivity and USB-C type thumb drive
Wi-Fi & Ethernet
FTP
Web server
Email
Log transfer and download
RS232 Connecting peripherals
Power supply DC adapter 100-240 VAC to 24 VDC 2 A
Environment 0 - 50 °C / 32 - 122 °F / 273 - 323 K
maximum 95 % RH non-condensing
Dimensions 205 x 160 x 77 mm (8.0 x 6.2 x 3.0 “)
Weight Approximately 1.2 kg (26.5 lbs.)

Specications 10
5.2. ELECTRODES
HI1131B – pH electrode
Range 0 to 13 pH
Reference cell type Double, Ag/AgCl
Junction type
Ceramic
Single
15-20 µL per h
Refill electrolyte 3.5M KCl
Maximum pressure 0.1 bar
Body material Glass
Tip shape Spheric (Ø 9.5 mm)
Operating temperature
− 5 to 100 °C (23 to 212°F) – HT
Temperature sensor No
Amplifier No
Cable Coaxial; 1 m (3.3’)
Recommended use Laboratory samples, general purpose
HI7662-TW – Temperature probe
Body material Stainless steel
Connector type RCA Phono connector
Dimensions Total length: 100 mm (3.94 “)
Active part: Ø 3 mm (0.12 “)
Cable 1 m (3.3’) length

11 Functional & LCD Description
6. FUNCTIONAL & LCD DESCRIPTION
6.1. MAIN UNIT
Front View
1
2
4
3
1. LCD display
2. Back key
3. Home key
4. Menu key
LCD Description
1
9
15
3
4
5
6
7
2
8
13
14
12
11
10
1. Current time
2. Current date
3. Stability indicator
4. Measure profile
5. pH reading
6. pH mV reading
7. pH electrode icon
8. Calibration information
9. Buffer trays
10. Temperature reading and temperature compensation status
11. Start logging icon
12. Measurement Menu icon
13. Connectivity and Printer icons
14. USB connection status and Logging space availability
15. User name (default “Admin”)

Functional & LCD Description 12
Status Area
Continuously displayed after powering the unit, status area runs horizontally across the top of the LCD screen.
• Top left – current time & date
• Middle – connectivity status
• Top right – storage space availability & username
Direct Keys
Icon Name Function
Back • returns user to previous hierarchical menu level
• exit or escape function
Home • access to measurement screen
• exit or escape function
Menu • access to Users, System Settings, Measurement Settings, Log Recall, Help
Rear View
Temp.
Ref.
pH/ORP
ON/OFF
USB-C
USB-A Ethernet
Extension
Power
24Vdc
HHII66221 pH/ORP
4 5 6 7
3
2
1
9 8
1. Input for power cable
2. Power button
3. Input for USB-C flash or PC cable
4. Input for USB-A flash (x2) or keyboard/printer
5. Ethernet port
6. Temperature probe connection port
7. pH/ORP probe connection port
8. Reference electrode socket
9. Peripherals port

13 Functional & LCD Description
6.2. ELECTRODES
HI1131B
pH electrode
HI7662-TW
Temperature probe
1
2
3
4
5
1
2
3
1. Reference wire
2. Inner reference junction
3. Reference fill cap
4. Outer reference junction
5. Glass bulb
1. Cable
2. Handle
3. Stainless steel tube

Getting Started 14
7. GETTING STARTED
7.1. ATTACHING THE ELECTRODE ARM
Attaching the electrode holder base plate
• Take the HI764060 electrode arm from the box.
• Identify the metal base plate (4) with the integrated pivot pin (5) and the screw (2).
• The plate may be attached to either side of the meter, left (L) or right (R).
• Place the meter face down on a clean, dry surface.
•
Align the hole on the base plate (3) over the rubber foot (6R or 6L). The pivot pin (5) should be facing
downward.
• Use a screwdriver (1) to tighten the screw (2) and attach the base plate to the meter.
R
R
L
1
2
3
4
5
5
7
6L
6R
• Position the meter with the display facing up.
• Slide the electrode holder (7) over the pivot pin (5). A “slide in” motion is required to lock the arm into position.
• For increased arm rigidity, tighten the metal knobs on both sides of the electrode arm.
Cable holder clip
The electrode holder is delivered with a cable holder clip (attached) that secures several cables whilst allowing
them to move freely with the arm motion.
1. To open the latch, press the clip inward while pulling up the latch.
2. To close the latch, lower latch over cable and snap closed.
The latch snaps in position and secures the cables inside.
Close clipOpen clip
press
pull

15 Getting Started
To reattach the clip onto the electrode arm:
1. Align the clip’s dovetail over the slot.
2. Gently push down to slide in position.
Using the adapter
The electrode arm is ended with an electrode holder.
The holder is fitted with an adapter with three different-sized apertures:
• center-front (temperature probe only)
• center-back (adapter for pH or ORP probe)
• left and right (pH or ORP probe)
7.2. USING THE ELECTRODE HOLDER
Use the holder for electrode support and easy movement in and out of beakers and containers during calibration
and sample measurement.
7.3. CONNECTING ELECTRODES & KEYBOARD
Connecting the electrodes
HI1131B pH electrode attaches to the benchtop through a BNC connector, which makes attaching and removing
the probe an easy process. When connected, the probe is automatically detected. With the meter off:
• Connect the probe to the BNC connection port (top right).
• Align the key and twist the plug into the socket.
• Place the probe into the holder and secure the cable. Power the unit.
Note: ORP electrodes utilize the BNC connection.
HI7662-TW temperature probe attaches to the benchtop through an RCA connector. With the meter off:
• Plug the connector into the socket.
• Place the probe into the holder and secure the cable. Power the unit.
Note: Ensure connectors and plugs are correctly plugged in prior to operating the device.
• Connect a pH or an ORP half cell to the BNC connector.
• Connect a reference half-cell electrode to the socket labeled Ref.
A banana connector is required for a separate reference.
Insert clip
pH probe location Temperature probe location
pH probe location
Adapter for pH probe center positioning

Getting Started 16
HI6221 Electrode compatibility
• Analog pH or ORP electrode with BNC connector (non-amplified or non-digital)
• pH or ORP half-cell sensors and separate reference electrodes with suitable jack connectors
•
Hanna Instruments pH electrodes with integral temperature elements. See Accessories, Electrodes section.
Connecting a USB-A keyboard
Connect a USB’s keyboard plug into the USB-A input on the back of the unit. Once connected the keyboard is
automatically detected.
Users can attach a keyboard to set up calibration password, sample ID, user ID, or company/lab name.
Connecting a printer
Hanna®aims to ensure meter compatibility with USB printers but can not ensure compatibility with all models.
HI6221 can print directly to certain models of USB-dedicated printers with PCL printer language capability.
Printer components and requirements
• Printer, PCL driver compatible
• Cable
`power cable
`USB connector cable with two ends:
type B connector (plugs into printer)
type A connector (plugs into the USB port on the meter)
7.4. POWERING THE UNIT, SELECTING OPERATING LANGUAGE & REGIONAL PREFERENCES
1. Connect the power adapter to the rear panel of the meter.
2. Connect the power plug into the 24V power socket.
3. Press the black ON/OFF power button.
At start up, the meter briefly displays the initialization screen.
4. The instrument launches into a Tutorial.
Tap to automatically enter measurement screen.
At first power on default language is English. A language window allows users to set operating language.

17 System Menu Items
To configure regional preferences, from Tutorial screen:
• Tap (direct Menu key) to access System Menu screen.
• Tap (System Settings icon) and select System tab.
Users can change the date, time, and region settings, as well as language preferences.
7.5. BASIC OPERATIONS
General operating modes are setup, measurement, logging, and data sharing.
• Tap (Menu key) to access:
User settings
System settings
Measurement settings
Log recall files and file management.
User can view a single sample or an interval log session, see Logging section for detailed description.
?
Help for text and video support
• Tap (Home key) to return to measurement.
• Tap (Measurement Menu icon) to access sensor-related functions.
8. SYSTEM MENU ITEMS
Tap (Menu key) to access System Menu screen. Users must have previously logged in.
System Menu icons
Symbol Name Functionality
Users Login and rights configuration & instrument accessibility
Settings System configuration, connectivity and printing items
Measurement Settings Tap to start configuring sensor-related functions
Log Recall Access logged measurement data
?
Help Access video-supported outline of main instrument functionalities
Brightness control bar
Drag the slider along the control bar to adjust brightness.

System Menu Items 18
8.1. USERS
Users is the first item under the System Menu and enables multiple-users configuration, rights management,
and account creation.
On first access, “Admin” is used as default user name and no password is required. Default options are updated
from the Users menu.
Function Administrator Rights* Standard User
Enable account creation ✓–
Reset password ✓–
Delete account ✓–
Assign administrator rights ✓–
View/Use Factory Settings reset ✓–
Customize settings ✓ ✓
Add FTP information ✓ ✓
Change password ✓ ✓
View and delete log files ✓ ✓
*Settings and configurations made by users with administrator rights can only be modified by users with identical rights.
Log in & Create New Account
1. Power the instrument.
Wait for the initialization process to complete.
2. Tap to enter Measurement screen.
Note: Tap (under ) to disable Tutorial.
3. Tap followed by .
4. Tap Edit Users to enter Account Management.
5. Tap to enable Account Creation and Logins. Tap to return.

19 System Menu Items
6. Tap Logout to enter Users screen. “Admin” account is automatically created (default).
7. Tap the plus symbol avatar.
8. Input user name and tap .
9. Enter password and tap . Reenter password to confirm.
Log Out & Switch User
1. Tap followed by Logout.
2. Tap on user’s account avatar.
3. Input password.
Adding & Removing Users (users with administrator rights only)
1. Tap followed by .
2. Tap Edit Users to enter Account Management screen and start editing.
Configure user settings
Name, Password, Icon Color, Full Name, information fields, FTP-dedicated fields, Email Address
• To edit option, tap field and use the on-screen keypad to input information.
• Use the FTP dedicated fields and email address for file transfer of logged data.

System Menu Items 20
Account Management
Users with administrator rights are able to:
• Enable Account Creation
• Enable Logins
Each power up requires user selection before instrument enters measurement mode.
• Enable Admin i.e. assign administrator rights to a standard user
• Reset Password
1. Select user name from users list.
2. Tap Reset Password.
The password is removed. User can set a new password.
• Delete users
Select user name and tap Delete. The instrument prompts for confirmation.