Hanna Instruments HI6221 User manual

INSTRUCTION MANUAL
HI6221
pH and ORP
Benchtop 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 contact list at www.hannainst.com.
Dear
Customer,

3
TABLE OF CONTENTS
TABLE OF CONTENTS
1. Preliminary Examination ................................................................................................... 5
2. Safety Measures ............................................................................................................... 6
3. Abbreviations ................................................................................................................... 6
4. User Interface – Icons ...................................................................................................... 7
5. General Description & Intended Use ................................................................................... 9
5.1. Main Features ...................................................................................................... 10
6. Specifications ................................................................................................................. 11
6.1. Instrument ........................................................................................................... 11
6.2. Electrodes ............................................................................................................ 14
7. Functional & LCD Description ........................................................................................... 15
7.1. Main Unit ............................................................................................................ 15
7.2. Electrodes ............................................................................................................ 17
8. Getting Started ............................................................................................................... 18
8.1. Attaching the HI764060 Electrode Holder ............................................................... 18
8.2. Using the Electrode Holder .................................................................................... 20
8.3. Connecting Electrodes & Keyboard .......................................................................... 20
8.4. Powering the Unit ................................................................................................. 21
8.5. Basic Operations ................................................................................................... 22
9. System Menu Items ....................................................................................................... 23
9.1. Users ................................................................................................................... 24
9.2. Settings ............................................................................................................... 28
9.3. Log recall ............................................................................................................. 34
9.4. Help .................................................................................................................... 40
10. Measurement & Electrode Setup Menu ........................................................................... 41
10.1. Reading ............................................................................................................. 44
10.2. Temperature ....................................................................................................... 45
10.3. Calibration ......................................................................................................... 46
10.4. View .................................................................................................................. 48
10.5. Alarm ................................................................................................................ 51

4
TABLE OF CONTENTS
10.6. Logging ............................................................................................................. 52
10.7. Profiles .............................................................................................................. 53
11. Calibration ................................................................................................................... 55
11.1. pH Calibration ..................................................................................................... 56
11.2. Relative mV Calibration ....................................................................................... 60
12. Measurement ............................................................................................................... 63
12.1. Measurement Tips ............................................................................................... 63
12.2. Direct Readings .................................................................................................. 63
12.3. Direct / Autohold Readings .................................................................................. 64
13. Error Messages ............................................................................................................. 65
14. Logging ....................................................................................................................... 66
14.1. Automatic Logging .............................................................................................. 66
14.2. Manual Logging ................................................................................................. 67
14.3. Autohold Logging ............................................................................................... 68
15. Maintenance & Conditioning ......................................................................................... 70
16. Accessories .................................................................................................................. 72
Certification ........................................................................................................................ 79
Recommendations for Users ................................................................................................. 79
Warranty ............................................................................................................................ 79
Regulatory notices for the Wi-Fi module ................................................................................ 80

5
PrELimiNAry ExAmiNATiON
1. PRELIMINARY EXAMINATION
Each HI6221 pH and ORP benchtop meter is supplied with:
• HI1131B pH electrode
• HI7662-TW temperature probe
• pH calibration starter kit consisting of:
• pH 4.01 buffer solution sachet (2 pcs.)
•pH 7.01 buffer solution sachet (4 pcs.)
•pH 10.01 buffer solution sachet (2 pcs.)
• HI700601 electrode cleaning solution sachet (2 pcs.)
• HI7082 3.5M KCl electrolyte solution (30 mL)
• HI764060 electrode holder
• Capillary pipette
• 24 VDC power adapter
• USB-C to USB-A cable
• Instrument quality certificate
• Probe quality certificate
• Instruction manual
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.

6
SAFETy mEASurES
2. SAFETY MEASURES
Handling precautions
The unit, while not fragile, can be damaged by improper usage and handling.
• Do not puncture or drop the unit.
• Keep the unit on a stable and even surface, away from contact with liquid.
• When carried, ensure the unit is held securely and not via an accessory, cable, or cord.
Usage precautions
• Do not use the device near heat sources, food, excessive dirt, dust, oil, chemicals, or in strong direct
sunlight.
• Do not place objects on top of the device.
• Do not insert objects into the ports, spaces around keys, or other openings.
• If the device becomes wet, gently wipe the exterior with a clean, dry cloth.
• Use only attachments and accessories specified in this manual.
Touch screen recommendations
• Avoid damaging the touch screen with pointed or sharp objects.
• Only operate the LCD touch screen by gentle finger tapping.
Device sharing
• Make sure that all users understand the safety and usage information provided in this manual.
Environment recommendations
• Use only in a safe place that is appropriate to application requirements.
3. ABBREVIATIONS
ATC Automatic Temperature Compensation
CSV Comma-Separated Values
FTP File Transfer Protocol
GLP Good Laboratory Practice
HT High Temperature
MTC Manual Temperature Compensation
NIST National Institute of Standards and Technology

7
uSEr iNTErFACE – iCONS
4. USER INTERFACE – ICONS
Capacitive keys Description
Home key
Back key
Menu key
Symbol on display Description
Measurement Menu
Available log storage
Log Recall
System Menu
Users
?
Help
Start logging
Stop logging
1
Manual logging
pH / ORP electrodes
Log recall, modify settings
Log recall, graph view - function not selected
Log recall, graph view - function active
Log recall, table view - function not selected
Log recall, table view - function active
Log recall, information view - function not selected
Log recall, information view - function active
Annotated text
Annotated text (in use)
Warning on standby function
Warning on active function

8
uSEr iNTErFACE – iCONS
Symbol on display Description
Autohold applied
pH Autohold, waiting stable pH measurement
mV Autohold, waiting stable mV measurement
D
Triggers log session, pending next stable measurement
A
Autohold logging in progress
Forward/backward navigation, sequence of steps - function not available
Active buffer selection during manual or semiautomatic calibration
Calibration procedure, buffer selection - function available
Calibration procedure, buffer selection - function not available
Connection established
Icon on display Description Connection status
In progress Connection issue Hardware error
Ethernet
Wi-Fi
USB-A and
USB-C
PC

9
GENErAL DESCriPTiON & iNTENDED uSE
5. GENERAL DESCRIPTION & INTENDED USE
HI6221 is a streamlined benchtop meter with a large touch screen display, comprised of a housing
and an integrated pH / ORP measurement module.
Compact and easy to operate, the benchtop meter is delivered with Hanna Instruments HI1131B
double junction combination pH electrode, together with HI7662-TW temperature probe.
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 including samples with metals and elevated temperatures.
Probe connection to the unit is secured through a galvanically isolated BNC connection.
HI7662-TW stainless steel temperature probe allows the meter to automatically temperature
compensate (ATC) pH measurements.
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 stick, keyboard
• USB type C – support for USB stick, 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
• Live updated, interactive graph
• Tabuled 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.
Capacitive keys & icons
Main functions, system settings, and measurement setup parameters are accessed and configured in an
intuitive way, using Menu key ( ), System Menu icon ( ), and Measurement Menu icon ( ).
User interface
User-friendly icons and symbols allow users to easily navigate and interpret the instrument functions.
Using the Menu key ( ) will show Users, System Settings, Log Recall and Help icons.
• The System Menu ( ) permits access to Network, Connectivity, System, and Info tabs.

10
GENErAL DESCriPTiON & iNTENDED uSE
• The Measurement Setup icon ( ), found in measurement screen, opens sensor setup parameters.
• The Log Recall icon ( ) recalls storred log sessions (Automatic continuous logging, Manual, or
Autohold).
5.1. 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
• Temperature compensation can be Automatic (using temperature probe) or set manually
• Audible and/or alarm messages for measurements outside of 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 1 000 000 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 that include measurements and calibration data (as .csv file)
• FTP and email for log export via Ethernet and Wi-Fi connection
Help section for meter guidance
• Video support presentation of main features

11
SPECiFiCATiONS
6. SPECIFICATIONS
6.1. INSTRUMENT
Range
pH
-2.0 to 20.0 pH
-2.00 to 20.00 pH
-2.000 to 20.000 pH
mV ±2000.0 mV
Temperature
-20.0 to 120.0 °C
-4.0 to 248.0 °F
253.0 to 393.0 K
Resolution
pH
0.1 pH
0.01 pH
0.001 pH
mV 1 mV
0.1 mV
Temperature 0.1 °C / 0.1 °F / 0.1 K
Accuracy
pH
±0.1 pH
±0.01 pH
±0.002 pH
(±1 last significant digit)
mV ±0.2 mV ±1 last significant digit
Temperature ±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 7.000 or 4.010
Sampling rate 1000 ms

12
SPECiFiCATiONS
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
Disabled
Daily: 0 min. to 23 hours and 59 min.
Periodic: 1 min. to 500 days, 23 hours and 59 min.
pH Views
Basic Measurement (pH, mV, Rel.mV, Abs.mV)
Temperature, Stability status
Simple GLP
Basic view information
Last calibration date, electrode offset, average
slope, and electrode condition
Full GLP Simple GLP information and calibration point details
Table Measurements updated every second are displayed
in table
Graph (Plot) pH (or mV) and temperature versus time graph can
be panned or zoomed (pinch-to-zoom technology)
Temperature Compensation Automatic or Manual
Logging
Type Automatic, Manual, Autohold
Number of records 50 000 maximum per file
Stores at least 1 000 000 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
Export option .csv file format
Users Up to 9 users and admin. account (default)

13
SPECiFiCATiONS
Connectivity
USB-A 2 ports for keyboard 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 100-240AC to 24VDC 2.5A
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.)

14
SPECiFiCATiONS
6.2. ELECTRODES
HI1131B — pH electrode
Range 0 to 14 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)
Recommended operating temperature 0 to 100°C (32 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 “)
Ø 3 mm (0.12 “), active part
Cable 1m (3.3’) length

15
FuNCTiONAL & LCD DESCriPTiON
7. FUNCTIONAL & LCD DESCRIPTION
7.1. MAIN UNIT
FRONT view
1
2
4
3
1 LCD display 3 Home key
2 Back key 4 Menu key
LCD description
1
3
6
4
7
5
2
13
12
11
10
8
9
1. Current time
2. Current date
3. Stability indicator
4. pH reading
5. mV reading
6. pH electrode icon
7. Calibration information: Electrode condition,
Offset, Slope, Date and Time
8. Buffer trays
9. Temp. reading and Temp. compensation status
10. Start Logging icon
11. Measurement Menu icon
12. USB connection status and Logging space availability
13. User name (default “HI6221”)

16
FuNCTiONAL & LCD DESCriPTiON
Status Area
Continuously displayed after powering the unit, status area runs horizontally across the top of the LCD
screen and is organized as:
• Current time and date, top left corner
• Connection status, middle
• Username and available log space, top right corner
Capacitive keys
Icon Name Function
Back key • direct key, returns the user to previous hierarchical menu level
• additionally, it also performs an exit or escape function
Home key • direct key for measurement screen
• performs an exit or escape function
Menu key • direct key for the system’s Menu items
• permits access to the system’s settings, log recall, help, and users configuration
REAR view
Temp.
Ref.
pH/ORP
ON/OFF
USB-C
USB-A Ethernet
Extension
Power
24Vdc
HI6221
2
3 4 5 6 7
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
5. Ethernet port
6. Temperature probe connection port
7. pH/ORP probe connection port
8. Reference electrode socket
9. Peripherals port

17
FuNCTiONAL & LCD DESCriPTiON
7.2. ELECTRODES
HI1131B – pH electrode HI7662-TW – Temperature probe
1
2
3
4
5
6
1
2
3
1. Reference wire
2. Inner reference junction
3. Double, Ag/AgCl reference cell type
4. Reference fill cap
5. Outer reference junction
6. Glass bulb
1. Cable
2. Handle
3. Stainless steel tube

18
GETTiNG STArTED
8. GETTING STARTED
8.1. ATTACHING THE HI764060 ELECTRODE HOLDER
Attaching the electrode stand and arm
• Take the HI764060 electrode holder 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 base plate over the rubber foot (6R or 6L) and hole (3) on the meter case. 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).
• Insert the electrode holder into the metal post in the base plate. Only 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 holder.
The electrode arm has an electrode holder on the end of it.
Attaching the cable holder clip
To secure the cabling, fasten the plastic clip onto the electrode arm by following the steps:
1. Align the clip’s dovetail over the slot.
2. Gently push down to slide in position.
3. To close the latch, lower latch over cable and snap closed.
The latch snaps in position and secures the cables inside.

19
GETTiNG STArTED
4. To open the latch, press the clip inward while pulling up the latch.
Insert clip Close clipOpen clip
press
pull
Easy to install and able to accomodate several cables, the clip secures the cabling by allowing cables
to move freely with the arm motion.
Using the adapter
The electrode holder at the end of the arm has three different-sized apertures:
• One located center-front (temperature probe only)
• One located center-back (pH probe with adapter only)
• Two located sideways, left and right (pH probe only, no adapter required)
When a center-positioning of the probe is required:
1. Orient the adapter such that the positioning marks align with the positioning marks on the
electrode holder.
2. Insert the adapter slowly into the holder keeping the positioning marks on the adapter and
electrode holder aligned with each other.
If the adapter appears blocked, it may need to be rotated slightly to correctly engage the guides.
3. Using medium to light pressure, push the adapter down until it securely clicks in place.
4. Insert the electrodes into the openings and clip the cables through the top-entry cable clip.
A d a p t e r
Cable clip
Positioning
marks
Electrode holder
Knobs

20
GETTiNG STArTED
Note: Always take notice of the following precautions when using the adapter:
Users should be able to insert the adapter with light to moderate pressure. Never use excessive
force to insert the adapter.
If the adapter is not reaching the bottom, if there is resistance, re-check that the positioning
marks are aligned on the adapter and arm holder’s head.
8.2. USING THE ELECTRODE HOLDER
Place electrodes in the holder for support and easy movement in and out of beakers and containers.
The electrode holder easily positions electrodes during calibration, sample measurement, and storage
with protective cap on.
8.3. CONNECTING ELECTRODES & KEYBOARD
Connecting the electrodes
Any analog pH or ORP electrode with BNC connector (non-amplified or non-digital) can be used with
the meter. pH or ORP half-cell sensors and separate reference electrode with suitable jack connectors
can also be used.
Hanna Instruments pH electrodes with integral temperature elements are also supported.
The HI1131B glass-bodied combination pH electrode is connected 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, on the top right of the meter.
• Align the key and twist the plug into the socket.
• Place the probe into the holder and secure the cable in the cable holder clip.
• Power the unit.
The temperature probe, HI7662-TW, is connected to the benchtop unit through an RCA connector.
With the meter off:
• Plug the connector into the socket.