Hanna Instruments HI 2221 User manual

1
Instruction Manual
HI 2221 HI 2223
pH/mV/ºC
Bench Meters
with Calibration
Check
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2
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
WARRANTY ............................................................................................. 2
PRELIMINARY EXAMINATION ...................................................................... 3
GENERAL DESCRIPTION ............................................................................ 3
FUNCTIONAL DESCRIPTION ........................................................................ 4
HI 2221 SPECIFICATIONS ........................................................................ 5
HI 2223 SPECIFICATIONS ........................................................................ 6
OPERATIONAL GUIDE ................................................................................ 7
pH CALIBRATION ...................................................................................... 9
ENHANCED CALIBRATION MESSAGES ........................................................ 14
ELECTRODE CONDITION & ELECTRODE RESPONSE TIME ............................ 16
pH BUFFER TEMPERATURE DEPENDENCE ................................................. 17
GOOD LABORATORY PRACTICE (GLP) ........................................................ 18
LOGGING .............................................................................................. 21
SETUP .................................................................................................. 24
TEMPERATURE CALIBRATION (for technical personnel only) .......................... 27
mV CALIBRATION (for technical personnel only) .......................................... 29
PC INTERFACE ....................................................................................... 30
ELECTRODE CONDITIONING & MAINTENANCE ............................................. 34
TROUBLESHOOTING GUIDE ..................................................................... 37
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ............................. 38
ACCESSORIES ........................................................................................ 39
RECOMMENDATIONS FOR USERS ............................................................. 43
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
HI 2221 and HI 2223 are guaranteed for two years against defects in
workmanship and materials when used for their intended purpose and
maintained according to instructions. The electrodes and the probes are
guaranteed 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 are 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 packaged for complete protection.
Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using these instruments.
This manual will provide you with the necessary information for correct
use of these instruments, as well as a precise idea of their versatility.
If you need additional technical information, do not hesitate to e-mail us
at [email protected].
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3
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY 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 or the nearest Hanna Customer Service Center.
Each instrument is supplied complete with:
•HI 1131P Glass-body Combination pH Electrode with 1 m (3.3 “)
cable
•HI 7662 Temperature Probe
•HI 76404N Electrode Holder
•pH 4.01 & 7.01 Buffer Solutions (20 mL each)
•HI 7071 Electrolyte Solution
• 12 VDC Power Adapter
• Instruction Manual
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.
HI 2221 and HI 2223 are logging microprocessor-based pH/ORP/
temperature bench meters with Calibration Check.
Calibration Check performs a set of diagnostic tests during calibration
using the history of electrode slope and offset to detect problems that can
cause loss of accuracy.
Calibration Check Features are:
• Enhanced Calibration Messages
During calibration the user is warned if one or more parameters are not suitable
to perform an accurate calibration.
• Electrode Condition on LCD Display
Determined from the electrode offset and slope.
• Electrode response time on LCD Display
Determined from electrode performance during calibration.
Other features include: up to five pH point calibration with
seven memorized buffers (1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and
12.45 pH), logging up to 100 samples (for HI 2221) and 500 samples
(for HI 2223), GLP, calibration due alarm, pH reading with manual or
automatic temperature compensation and PC software interface.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
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FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
Front Panel
Rear Panel
1) Liquid Crystal Display (LCD).
2) CAL key, to enter and exit calibration mode.
3) CFM/GLP key, to confirm calibration, different values or to display
Good Laboratory Practice information.
4) ºC key, to manually increase temperature value or other parameters.
5) ºC key, to manually decrease temperature value or other parameters.
6) SETUP key, to enter/exit SETUP mode.
7) RANGE key, to select measurement range, switch to focused data in
SETUP or to toggle between buffer value and temperature during
calibration.
8) LOG/CLR key, to store a value into memory, to clear pH calibration,
or to delete log records.
9) RCL key, memory recall.
10) ON/OFF switch.
11) Power supply socket.
12) USB connector.
13) BNC electrode connector.
14) Temperature probe socket.
15) Electrode reference socket.
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HI 2221HI 2221
HI 2221HI 2221
HI 2221
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
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6
HI 2223HI 2223
HI 2223HI 2223
HI 2223
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
egnaR
00.61ot00.2–Hp
000.61ot000.2–Hp
9.999±Vm
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°0.021ot0.02–C
noituloseR
10.0Hp
100.0Hp
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1Vm0002±()Vm
°1.0C
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F°86/C°02@
10.0±Hp
200.0±Hp
2.0±Vm9.999±(m)V
1±Vm0002±()Vm
°2.0±C
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0.4,86.1(
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7
3 cm
(1¼")
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
POWER CONNECTIONPOWER CONNECTION
POWER CONNECTIONPOWER CONNECTION
POWER CONNECTION
Plug the 12 VDC adapter into the power supply socket.
Notes: • These instruments use non volatile memory to retain the pH,
mV, temperature calibrations and all other settings, even
when unplugged.
• Make sure a fuse protects the mains line.
ELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONS
ELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONS
ELECTRODE AND PROBE CONNECTIONS
For HANNA P Type pH or ORP electrodes (with internal reference) connect
the electrode’s BNC to the socket on the back of the instrument and the
pin to the reference socket.
Note: Electrode condition and response information is displayed on the
bar graph gauges during the day the calibration is performed,
only if HANNA P type (PIN) electrodes are used.
If the electrode is not recognized as a HANNA P type electrode, the
bar graph gauges will blink (25 seconds OFF, 4 seconds ON, full
bar graph).
For temperature measurement and automatic temperature compensation
connect the temperature probe to the appropriate socket.
INSTRUMENT STINSTRUMENT ST
INSTRUMENT STINSTRUMENT ST
INSTRUMENT STARTART
ARTART
ART-UP-UP
-UP-UP
-UP
• Turn the instrument on by pressing the ON/OFF switch located on
the rear panel.
• All LCD tags are displayed and a beep is sounded while the instrument
performs a self test.
• The instrument will display “LoAD” message and “ ” blinking until
initialization is complete.
• The “Unscrew electrode refilling cap” message reminds the user
to loosen or remove the electrode refilling cap to improve the electrode’s
response time.
• The instrument automatically defaults to pH measurement mode
unless a HANNA P type ORP electrode is detected.
pH MEASUREMENTpH MEASUREMENT
pH MEASUREMENTpH MEASUREMENT
pH MEASUREMENT
Make sure the instrument has been calibrated before
taking pH measurements.
• Submerse the tip of a properly conditioned
electrode (see page 34) and the temperature
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8
probe approximately 3 cm (1¼”) into the sample to be tested and stir
gently. Allow time for the electrode to stabilize.
• The pH is displayed on the primary LCD and the temperature on the
secondary LCD.
• The pH reading is out of range, the closest full-scale value will be
displayed blinking on the primary LCD.
• It is also possible to view the mV reading by pressing the RANGE key.
If measurements are taken successively in different samples, it is
recommended to rinse the electrode thoroughly with deionized
water or tap water and then with some of the next sample to
prevent cross-contamination.
The pH reading is affected by temperature. In order to measure the pH
accurately, this temperature effect must be compensated for. To use the
Automatic Temperature Compensation feature, connect and submerse
the HI 7662 temperature probe into the sample as close to the electrode
as possible and wait for a few minutes.
If the temperature of the sample is known, manual
compensation can be performed by disconnecting the
temperature probe.
The display will show the last recorded temperature
reading with the “°C” symbol blinking.
The temperature can now be adjusted with the ARROW keys (from
-20.0 ºC to 120.0 ºC).
ORP MEASUREMENTSORP MEASUREMENTS
ORP MEASUREMENTSORP MEASUREMENTS
ORP MEASUREMENTS
An optional ORP electrode must be used to perform ORP measurements
(see Accessories).
Oxidation-Reduction Potential (REDOX) measurements provide the
quantification of the oxidizing or reducing power of the tested sample.
The surface of the ORP electrode must be clean and smooth in order to
obtain an accurate measurement.
C
MTC
C
SLOW FAST POOR GOOD
mV
C
ATC
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Pretreatment solutions are available to condition
the electrode and speed up the response time.
• The instrument automatically defaults to the
mV measurement mode if HANNA P type ORP
electrode is detected.
• Submerse the ORP electrode tip (3 cm/1¼”) into the sample. Allow
a few minutes for the reading to stabilize.
• The instrument displays the mV reading on the primary LCD.
• If the reading is out of range, the closest full-scale value will be
displayed blinking on the primary LCD.
TAKING TEMPERATURE MEASUREMENTSTAKING TEMPERATURE MEASUREMENTS
TAKING TEMPERATURE MEASUREMENTSTAKING TEMPERATURE MEASUREMENTS
TAKING TEMPERATURE MEASUREMENTS
Connect the HI 7662 temperature probe and turn the
instrument on. Dip the temperature probe into the sample
and allow the reading on the secondary LCD to stabilize.
Calibrate the instrument frequently, especially if high accuracy is
required. For best results and constant display of electrode condition
and electrode response on the bar graph gauges, daily calibration is
recommended.
The instrument should be recalibrated:
• Whenever the pH electrode is replaced.
• At least once a day.
• After testing aggressive chemicals.
• If high accuracy is required.
• If “CAL DUE” message is displayed during measurement.
Every time you calibrate the instrument use fresh buffers and perform an
electrode cleaning procedure (see page 36).
PREPARATIONPREPARATION
PREPARATIONPREPARATION
PREPARATION
Pour small quantities of the buffer solutions into clean beakers. If possible,
use plastic or glass beakers to minimize any EMC interferences.
For accurate calibration and to minimize cross-contamination, use two
beakers for each buffer solution. One for rinsing the electrode and one for
calibration.
pp
pp
pH CALIBRATIONH CALIBRATION
H CALIBRATIONH CALIBRATION
H CALIBRATION
3 cm
(1¼")
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PROCEDUREPROCEDURE
PROCEDUREPROCEDURE
PROCEDURE
Calibration can be performed at up to five points. For accurate
measurements a three point calibration is recommended. Calibration
can be performed using the seven memorized buffers:
•pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45.
FIVE-POINT CALIBRATIONFIVE-POINT CALIBRATION
FIVE-POINT CALIBRATIONFIVE-POINT CALIBRATION
FIVE-POINT CALIBRATION
For most applications it is recommended that pH 7.01 or 6.86 buffers be
used as the first calibration point and pH 4.01 (for acidic samples) or pH
9.18/10.01 (for alkaline samples) as the second calibration point.
Note: The pH 12.45 buffer is not for general measurement; use only if
the sample is very alkaline to avoid sodium error.
• Submerse the pH electrode and the temperature probe approximately
3 cm (1¼”) into a buffer solution and stir gently. The temperature
probe should be close to the pH electrode.
• Press the CAL key. “CAL” and “pH” tags will be on, and the
“CLEAR CAL if new electrode” tag will blink.
• Press the CLR key if you are using a new electrode or want to clear
the calibration history. The instrument will display the “donE” message
for a few seconds.
• Press the CAL key, or wait a few seconds to continue.
It is very important to clear the calibration history when a new electrode
is used because all error and warning messages that appear during
calibration depend on the calibration history.
Note: • The “CLEAR CAL if new electrode” will only appear if the
instrument has been previously calibrated.
• The “CAL”, “pH” and “BUFFER” tags will appear and the
“7.01” buffer will be displayed on the secondary LCD.
• If necessary, press the ARROW keys to select a different buffer
value.
• The “ ” tag will blink until the reading has stabilized.
CLEAR CAL if new electrode
pH
CAL
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