Hanna Instruments HI 2210 User manual

1
Instruction Manual
Microprocessor-based
pH/mV/°C
Bench Meters
HI 2210 HI 2211
www.hannainst.com

2
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] or view our worldwide contact list at
www.hannainst.com.
All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner.

3
HI 2210 and HI 2211 are guaranteed for two years against defects
in workmanship and materials when used for their intended purpose
and maintained according to instructions. Electrodes and probes are
guaranteed for 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 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 packed for
complete protection.
WARRANTY .................................................................................. 3
PRELIMINARY EXAMINATION ........................................................ 4
GENERAL DESCRIPTION ................................................................ 4
FUNCTIONAL DESCRIPTION .......................................................... 5
SPECIFICATIONS........................................................................... 6
OPERATIONAL GUIDE ................................................................... 7
pH CALIBRATION ....................................................................... 10
TEMPERATURE CALIBRATION (for technical personnel only)........... 13
pH BUFFER TEMPERATURE DEPENDENCE...................................... 15
ELECTRODE CONDITIONING AND MAINTENANCE ........................... 16
TROUBLESHOOTING GUIDE ........................................................ 19
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ................. 20
ACCESSORIES ............................................................................. 21
TABLE OF CONTENTS
WARRANTY

4
The Hanna HI 2210 and HI 2211 are microprocessor based pH and
temperature bench meters.
HI 2211 can also be used for ion concentration (ISE) and Oxidation
Reduction Potential (ORP) in the mV range.
pH measurements are compensated for temperature effect manually or
automatically with the HI 7662temperature probe.
The instrument is equipped with a large easy-to-read LCD which shows
the pH (or mV) and temperature simultaneously, together with graphic
symbols.
A stability indicator makes the calibration procedure error free.
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 with:
•HI 1131B Glass-body Combination pH Electrode
•HI 7662 Temperature Probe
•HI 76404N Electrode Holder
•pH 4.01 & 7.01 Buffer Solutions, 20 mL each
•HI 7082 Electrolyte Solution
•HI 700661 Cleaning Solution
•12 VDC Power Adapter
•Instruction Manual
Note:Save all packing material until you are sure that the
instrument functions correctly. All defective itemsmust be
returned in the original packing with the supplied accessories.
PRELIMINARY EXAMINATION
GENERAL DESCRIPTION

5
Front Panel
1) Liquid Crystal Display (LCD).
2) CAL key, to enter and exit calibration mode.
3) CFM key, to confirm different values.
4) °C and °C keys, to manually increase/decrease tem-
perature or select pH buffer.
5) RANGE key, to select measurement range (HI 2211 only).
6) MEM key, to store a value into memory.
7) MR key, memory recall.
8) Secondary LCD.
9) Primary LCD.
10) ON/OFF switch.
11) Power adapter socket.
12) BNC electrode connector.
13) Temperature probe socket.
14) Electrode reference socket.
Rear Panel
FUNCTIONAL DESCRIPTION

6
SPECIFICATIONS
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POWERCONNECTION
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 main line.
ELECTRODEANDPROBECONNECTIONS
For pH or ORP combination electrode connect to the BNC connector on
the back of the instrument.
For electrodes with a separate reference connect the electrode’s BNC to the
BNC connector and the reference electrode plug to the reference socket.
For temperature measurements and automatic temperature compensation
connect the temperature probe to the appropriate socket.
INSTRUMENT START-UP
•Turn the instrument on by pressing the ON/OFF switch located
on the rear panel.
•All LCD segments are displayed while the instrument performs a
self test.
pH MEASUREMENTS
Make sure the electrode and the instrument have been
calibrated together before taking pH measurements.
•Submerse the electrode and the temperature
probe approximately 3cm (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.
•If the pH reading is out of range, the closest full scale value will
be displayed blinking on the LCD.
OPERATIONAL GUIDE
3 cm
(1¼")

8
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 in order to
prevent cross-contamination.
The pH reading is affected by temperature. In order to measure the
pH accurately, thetemperature 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 as possible to the electrode and wait for a few seconds.
If the temperature of the sample is known, manual temperature
compensation can be used by disconnecting the temperature probe.
The display will show the last recorded
temperature reading with the “°C” tag blinking.
The temperature can now be adjusted with
the ARROW keys (from -20.0 °C to 120.0 °C).
ORPMEASUREMENTS(HI2211 only)
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.
•Press RANGE to enter mV range.
•Submerse the tip of the ORP electrode 3 cm
(1¼") into the sample to be tested and allow a
few seconds for the reading to stabilize.
•The instrument displays the mV reading on the primary LCD and
the temperature on the secondary LCD.
•If the reading is out of range, the closest full scale value will be
displayed blinking on the LCD.
3 cm
(1¼")

9
TEMPERATUREMEASUREMENTS
Connect the HI 7662 temperature probe to the TEMP
socket and turn the instrument on.
Submerse the temperature probe into the sample and
allow the reading on the secondary LCD to stabilize.
MEMORYFUNCTION
Press and hold down MEM key to store the last reading in the
meter’s memory. The “MEM” tag will be displayed.
Press MR (memory recall) key to display the memorized reading.
The “MEM” tag will be displayed.

10
Calibrate the instrument often, especially if high accuracy is required.
The instrument should be recalibrated:
•Whenever the pH electrode is replaced.
•At least once a week.
•After testing aggressive chemicals.
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.
If you are measuring in the acidic range, use pH 7.01 or pH 6.86 as
first buffer and pH 4.01 as second buffer. If you are measuring in the
alkaline range, use pH 7.01 or pH 6.86 as first buffer and pH 10.01
or pH 9.18 as second buffer.
PROCEDURE
A two-point calibration is recommended however a one-point calibration
will be permitted. Calibration can be performed using the five
memorized buffers:
•pH 4.01, 6.86, 7.01, 9.18 and 10.01.
TWO-POINT CALIBRATION
•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 CAL. The “CAL” and “ ” messages will appear and
“7.01” buffer will be displayed on the secondary LCD.
•If necessary, press the ARROW keys to select a different buffer value.
•The “ ” symbol will blink on the LCD until the reading is stable.
3 cm
(1¼")
pH CALIBRATION

11
•When the reading is stable and close to the selected buffer,
“READY” message will appear and “CFM” message will blink.
•Press CFM to confirm calibration.
•The calibrated value is then displayed on the
primary LCD and the secondary LCD will display
the second expected buffer value.
•After the first calibration point is confirmed,
submerse the pH electrode and the temperature
probe approximately 3 cm (1¼”) into the
second buffer solution and stir gently. The
temperature probe should be close to the pH
electrode.
•If necessary, press the ARROW keys to select a different buffer value.
Note:The instrumentswill automatically skip the buffer used for the
first point. It also skips 6.86 if 7.01 buffer was used and vice
versa. Likewise, it will skip 9.18 if 10.01 buffer was used and
vice versa.
•The “ ” symbol will blink on the LCD until the reading is stable.
•When the reading is stable, “READY” message
will appear and “CFM” message will blink.
•Press CFM to confirm calibration. The instrument
will return to measurement mode.
Notes:•To clear previous calibration data enter calibration mode,
press and hold down CFM, then press CAL. The display
will show “CLR” and then return to measurement mode.
•If the value measured by the meter is not close to the
selected buffer, “WRONG ” and “WRONG ” messages
will blink alternately. In this case check if the correct buffer
has been used, or regenerate the electrode by following the
cleaning procedure (see page 18). If necessary, change the
buffer or the electrode.
3 cm
(1¼")

12
•The “WRONG” message and temperature value are
displayed blinking if the temperature reading is out of
the defined temperature range of the buffer. Calibration
cannot be confirmed in this situation.
•Press RANGE to display the
temperature reading on the LCD
during calibration (HI 2211 only).
ONE-POINT CALIBRATION
•Proceed as described in “Two-point calibration” section.
•Press CAL after the first calibration point
was confirmed.
The instrument will return to measurement
mode and will memorize the one-point
calibration data (new offset).
The instrument will use the slope from the previous calibration. The
default slope will be used if there is no previous calibration.

13
All the instruments are factory calibrated for temperature.
Hanna’s temperature probes are interchangeable and no temperature
calibration is needed when they are replaced.
If the temperature measurements are inaccurate, temperature
recalibration should be performed.
For an accurate recalibration, contact your dealer or the nearest
Hanna Customer Service Center, or follow the instructions below.
•Prepare a vessel containing ice and water and another one
containing hot water (around 50 ºC). Place insulation material
around the vessels to minimize temperature changes.
•Use a calibrated thermometer with a resolution of 0.1 ºC as a
reference thermometer.
•With the instrument off, press and hold down the CAL &MEM
keys, then power on the instrument. The “CAL” message will
appear and the secondary LCD will show “0.0 ºC”.
•Submerse the temperature probe in the vessel with ice and water
as near as possible to the reference thermometer. Allow a few
seconds for the probe to stabilize.
•Use the ARROW keys to set the reading on the secondary LCD to
that of ice and water, measured by the reference thermometer.
•When the reading is stable and close to the selected calibration point,
“READY” message will appear and “CFM” message will blink.
•To confirm press CFM. The secondary LCD will show “50.0 ºC”.
TEMPERATURE CALIBRATION
(for technical personnel only)

14
•Submerse the temperature probe in the second vessel as near as
possible to the reference thermometer. Allow a few seconds for the
probe to stabilize.
•Use the ARROW keys to set the reading on the secondary LCD to
that of the hot water.
•When the reading is stable and close to the selected calibration
point, “READY” tag will appear and “CFM” tag will blink.
•Press CFM to confirm. The instrument returns
to measurement mode.
Note:If the reading is not close to the selected calibration point,
“WRONG” tag will blink. Change the temperature probe and
restart calibration.

15
The temperature has an effect on pH. The calibration buffer solutions
are affected by temperature changes to a lesser degree than normal
solutions. During calibration the instrument will automatically calibrate
to the pH value corresponding to the measured or set temperature.
During calibration the instrument will display the pH buffer value at
25 ºC.
PMET SREFFUBHp
Cº Fº 10.4 68.6 10.7 81.9 10.01
0 23 10.4 89.6 31.7 64.9 23.01
5 14 00.4 59.6 01.7 93.9 42.01
01 05 00.4 29.6 70.7 33.9 81.01
51 95 00.4 09.6 50.7 72.9 21.01
02 86 00.4 88.6 30.7 22.9 60.01
52 77 10.4 68.6 10.7 81.9 10.01
03 68 20.4 58.6 00.7 41.9 69.9
53 59 30.4 48.6 99.6 11.9 29.9
04 401 40.4 48.6 89.6 70.9 88.9
54 311 50.4 38.6 89.6 40.9 58.9
05 221 60.4 38.6 89.6 10.9 28.9
55 131 80.4 48.6 89.6 99.8 97.9
06 041 90.4 48.6 89.6 79.8 77.9
56 941 11.4 48.6 99.6 59.8 67.9
07 851 21.4 58.6 99.6 39.8 57.9
57 761 41.4 68.6 00.7 19.8 47.9
08 671 61.4 78.6 10.7 98.8 47.9
58 581 71.4 78.6 20.7 78.8 47.9
09 491 91.4 88.6 30.7 58.8 57.9
59 302 02.4 98.6 40.7 38.8 67.9
pH BUFFER TEMPERATURE
DEPENDENCE

16
PREPARATIONPROCEDURE
Remove the protective cap of the pH electrode.
DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal
with electrodes. They will disappear when rinsed with water.
During transport, tiny bubbles of air may form inside the glass bulb
affecting proper functioning of the electrode. These bubbles can be
removed by “shaking down” the electrode as you would do with a
glass thermometer.
If the bulb and/or junction is dry, soak the electrode in HI 70300 or
HI 80300 Storage Solution for at least one hour.
ELECTRODE CONDITIONING AND
MAINTENANCE

17
For refillable electrodes:
If the filling solution (electrolyte) is more than 2½ cm (1") below the
fill hole, add HI 7082 or HI 8082 3.5M KCl Electrolyte Solution for
double junction or HI 7071 or HI 8071 3.5M KCl+AgCl Electrolyte
Solution for single junction electrodes.
Unscrew the fill hole screw during measurements.
For AmpHel®electrodes:
If the electrode does not respond to pH changes, the battery is dead
and the electrode should be replaced.
MEASUREMENT
Rinse the electrode tip with distilled water. Submerse the tip (3 cm /1¼”)
into the sample and stir gently for a few seconds.
For a faster response and to avoid cross-contamination of the samples,
rinse the electrode tip with a few drops of the solution to be tested,
before taking measurements.
STORAGEPROCEDURE
To minimize clogging and assure a quick response time, the glass
bulb and the junction should be kept moist and not allowed to dry out.
Replace the solution in the protective cap with a few drops of
HI 70300 or HI 80300 Storage Solution or, in its absence, Fill
Solution (HI 7071 or HI 8071 for single junction and HI 7082 or
HI 8082 for double junction electrodes). Follow the Preparation
Procedure on page 16 before taking measurements.
Note:NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED
WATER.
PERIODICMAINTENANCE
Inspect the electrode and the cable. The cable must be intact and
well connected. No cracks should be seen on the electrode stem or
bulb. Connectors must be perfectly clean and dry. If any scratches or
cracks are present, replace the electrode. Rinse off any salt deposits
with water.
For refillable electrodes:
Refill the reference chamber with fresh electrolyte (HI 7071 or HI 8071
for single junction or HI 7082 or HI 8082 for double junction
electrodes). Allow the electrode to stand upright for 1 hour.
Follow the Storage Procedure above.

18
CLEANINGPROCEDURE
• General Soak in Hanna HI 7061 or HI 8061 General
Cleaning Solution for approximately ½ hour.
• Protein Soak in Hanna HI 7073 or HI 8073 Protein
Cleaning Solution for 15 minutes.
• Inorganic Soak in Hanna HI 7074 Inorganic Cleaning
Solution for 15 minutes.
• Oil/grease Rinse with Hanna HI 7077 or HI 8077 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 HI 70300 or HI 80300 Storage Solution for
at least 1 hour before taking measurements.

19
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TROUBLESHOOTING GUIDE

20
Typical Electrode Life
Ambient Temperature 1- 3 years
90 °C Less than 4 months
120 °C Less than 1 month
Alkaline Error
High concentrations of sodium ions interfere with readings in alkaline
solutions. The pH at which the interference starts to be significant
depends upon the composition of the glass. This interference is called
alkaline error and causes the pH to be underestimated. Hanna’s glass
formulations have the indicated characteristics.
1.0 Mol L-1 Na+
0.1 Mol L-1 Na+
Sodium Ion Correction for Glass at 20-25 °C
Concentration pH Error
13.00
13.50
14.00
12.50
13.00
13.50
14.00
0.10
0.14
0.20
0.10
0.18
0.29
0.40
The resistance of glass electrodes partially depends on the temperature.
The lower the temperature, the higher the resistance. It takes more time
for the reading to stabilize if the resistance is higher. In addition, the
response time will suffer to a greater degree at temperatures below 25 °C.
Since the resistance of the pH electrode is in the range of 50-200 Mohms,
the current across the membrane is in the pico Ampere range. Large
currents can disturb the calibration of the electrode for many hours.
For these reasons high humidity environments, short circuits and
static discharges are detrimental to a stable pH reading.
The pH electrode’s life also depends on the temperature. If constantly
used at high temperatures, the electrode life is drastically reduced.
TEMPERATURE CORRELATION
FOR pH SENSITIVE GLASS