Hanna Instruments pH 209 User manual

Instruction Manual
www.hannainst.com
pH 209 • pH 209R
Bench Top pH Meters

3
2
pH 209 bench-top pH meter is designed for simplicity of use.
It features a large easy-to-read liquid crystal display (LCD) and user
friendly keyboard.
The pH calibration is made simple through the easy-to-operate front
panel knobs for offset and slope adjustment.
A front knob is provided for easy manual temperature compensation of
the pH reading.
pH 209 can also measure ion concentration (ISE) and ORP (Oxidation
Reduction Potential) in the mV range.
The range selection (pH, mV or °C for temperature compensation) is
made simple through the front membrane keyboard.
The large LCD is provided with arrows that quickly and clearly indicate
the selected range.
It is also available the model pH209R with recorder output feature.
GENERAL DESCRIPTION
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.
Each meter is supplied complete with:
• HI 1332B plastic-body combination double-junction refillable
pH electrode with BNC connector and 1m (3.3') cable
•12 Vdc adapter
•Instruction manual.
Note: Save all packing material until you are sure that the instru-
ment functions correctly. All defective items must be returned in
the original packing with the supplied accessories.
Dear Customer,
Thank you for choosing a Hanna Instruments Product.
Please read this instruction manual carefully before using the instru-
ment.
This manual will provide you with all the necessary information for the
correct use of the instrument, as well as a precise idea of its versatility
in a wide range of applications.
If you need additional technical information, do not hesitate to e-mail
us at [email protected].
These instruments are in compliance with the directives.
PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OPERATIONAL GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PH CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PH VALUES AT VARIOUS TEMPERATURES . . . . . . . . . . . . . . . . . . . .10
ELECTRODE CONDITIONING & MAINTENANCE . . . . . . . . . . . . . . . . . 11
TEMPERATURE-RESISTANCE CORRELATION
FOR HANNA pH SENSITIVE GLASS . . . . . . . . . . . . . . . . . . . . . . . . 14
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
ELECTRODE APPLICATION REFERENCE GUIDE . . . . . . . . . . . . . . . . . 21
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CE DECLARATION OF CONFORMITY . . . . . . . . . . . . . . . . . . . . . . . . 23
TABLE OF CONTENTS

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4
FUNCTIONAL DESCRIPTION
Range 0.00 to 14.00 pH
±1999 mV
Resolution 0.01 pH / 1 mV
Accuracy (@20°C) ±0.01 pH / ±1 mV
Typical EMC Deviation ±0.03 pH / ±2 mV
pH Calibration Manual, 2 point, through knobs
Temperature Compensation
Manual from 0 to 100°C (32 to 212°F)
pH Electrode (included)
HI 1332B plastic body, double junction,
refillable, with BNC and 1m (3.3') cable
Analog output 0 to 5V
(pH209R only) 0 to 14 pH / -1999 to +1999 mV
Temperature: always 0
Input Impedance 1012 ohm
Power Supply 12 Vdc adapter (included)
Environment 0 to 50°C (32 to 122°F);
RH max 95% non-condensing
Dimensions 240 x 182 x 74 mm (9.4x7.2x2.9")
Weight approx. 1.0 kg (2.2 lb.)
SPECIFICATIONS
1) Liquid Crystal Display (LCD)
2) pH slope adjustment knob
3) pH offset adjustment knob
4) pH range selection key
5) mV range selection key
6) °C range selection key
7) Temperature setting knob
8) ON/OFF switch
9) Power adapter socket
10) BNC electrode connector
11) Electrode reference socket
12) Analog output (PH209R only)

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6
4 cm
(1½")
• Press the pH key to display the pH measurement.
• The display shows the pH value of the test solution compensated
for temperature.
If measurements are taken in different samples successively, it is
recommended that the electrode be rinsed thoroughly for better condi-
tioning and to eliminate cross-contamination of the sample.
For the rinsing process, it is recommended to use a liberal amount of
the next solution to be measured.
TAKING ORP MEASUREMENTS
pH 209 has the capability to take ORP measurements, using an ORP
electrode. Hanna Instruments offers a variety of ORP electrodes for this
purpose (see accessories). Contact your Dealer for more information.
• Connect the ORP electrode to the meter and
submerge the tip (4 cm / 1½") into the sample
to be tested.
Note: ORP measurements are taken without temperature compensa-
tion.
• Press the mV key to enter the mV mode. Allow a few
minutes for the reading to stabilize.
• The display will indicate the mV value (positive or negative).
AFTER MEASUREMENTS
• Press the ON/OFF switch again to switch the instrument off.
Power connection
Plug the supplied 12 Vdc adapter into the power supply socket (#9
on page 4).
Note: Make sure the mains line is protected by a fuse.
Electrode connection
For combination pH or ORP electrodes (with internal reference)
connect the electrode's BNC to the socket provided (#10 on page 4).
For an electrode with a separate reference, connect the measuring
electrode's BNC to the BNC socket (#10 on page 4) and the reference
electrode's jack to the socket provided (#11 on page 4).
Note: to prevent damage to the electrode, remove the pH electrode
from the solution before turning the meter off.
If the meter is OFF, detach the electrode from the meter before
immersing the electrode in the storage solution.
TAKING pH MEASUREMENTS
Make sure that the instrument has been calibrated for pH before
taking pH measurements.
• Switch the instrument on by pressing the ON/OFF
switch.
• Immerse the electrode tip (4 cm/1½") into the
sample and shake briefly.
• Take the temperature of the solution with a
ChecktempC or a glass thermometer (e.g.25°C).
• Press the °C key to display temperature setting on the LCD and
adjust the temperature knob to display the temperature of the
sample.
4 cm
(1½")
OPERATIONAL GUIDE

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8
HI 7004 HI 7007
HI 7004
IMPORTANT
The instrument's pH range should be re-calibrated:
• When the meter is new.
• Whenever the pH electrode is replaced.
• At least once a month.
• After use in aggressive chemicals.
• After cleaning procedure and changing the reference electrolyte.
• For greatest accuracy.
INITIAL PREPARATION
Pour small quantities (up to 4cm / 1½" level)
of pH 7.01 (HI 7007) and pH4.01 (HI 7004)
or pH 10.01 (HI 7010) solution into clean
beakers. If possible use plastic beakers to
minimize any EMC interferences.
If you are measuring in the acid range, use pH 4.01 as second
buffer; if you are measuring in the alkaline range, use pH 10.01 as
second buffer.
For accurate calibration, use two bea-
kers for each buffer solution; the first
for rinsing the electrode, the second
for calibration. In this way, contami-
nation of the buffer is minimized.
Note: The electrode should be submerged approximately 4 cm (1½")
into the solution.
Note: If you need to calibrate to NBS standards, use pH 6.86 (HI
7006) and pH 9.18 (HI 7009) instead of pH 7.01 and 10.01
respectively.
Use a ChecktempC or a glass thermometer as reference.
PROCEDURE
• Switch the instrument on by pressing the
ON/OFF button.
• Rinse and immerse the pH electrode into
pH 7.01 buffer and shake briefly. Wait for
the reading to stabilize.
pH CALIBRATION • Note the temperature of the buffer solution using
a ChecktempC or a glass thermometer
(e.g.20°C).
• Press the °C key to select temperature setting.
• Adjust the Temperature knob until the LCD shows the noted
temperature.
• Press the pH key to select pH measurement.
• Wait a couple of minutes and adjust the OFFSET knob until
display shows the pH value at the noted temperature (see the pH
versus temperature chart).
• Rinse and immerse the pH electrode in pH 4.01/pH 10.01 buffer
and shake briefly.
• Wait a couple of minutes and adjust the SLOPE knob until
display shows the pH value at the noted temperature (see the pH
versus temperature chart).
• The pH calibration is now complete.
4 cm
(1½")
HI 7007
RINSE
HI 7007
CALIBRATION

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10
Reference
Filling Hole
Reference
Filling Hole
Sensitive
Wire
Reference
Wire
Reference
Junction
Glass
Bulb
Glass
Bulb
Reference
Junction
Reference
Junction Reference Junction
Platinum or
Gold tip Platinum or Gold tip
Reference
Wire
Reference
Wire
Sensitive
Wire
Glass Body
pH Electrode
Plastic Body
pH Electrode
Plastic Body
ORP Electrode Glass Body ORP Electrode
Reference
Wire
ELECTRODE CONDITIONING
AND MAINTENANCE
PREPARATION
Remove the protective cap.
DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal
with electrodes and 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
storage solution for at least one hour.
pH VALUES AT VARIOUS TEMPERATURES
Temperature has an effect on pH. The calibration buffer solutions are
affected by temperature changes to a lesser degree than normal
solutions.
For manual temperature calibration please refer to the following chart.
For instance, if the buffer temperature is 25°C, the display should
show pH 4.01, 7.01 or 10.01 at pH 4, 7 or 10 buffers, respectively.
At 20°C, the display should show pH 4.00, 7.03 or 10.06. The meter
reading at 50°C will then be 4.06, 6.98 or 9.82.
Note: to prevent damage to the electrode, remove the pH electrode
from the solution before turning the meter off.
If the meter is OFF, detach the electrode from the meter before
immersing the electrode in the storage solution.
TEMP pH VALUES
°C °F 4.01 6.86 7.01 9.18 10.01
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
32
41
50
59
68
77
86
95
104
113
122
131
140
149
158
4.01
4.00
4.00
4.00
4.00
4.01
4.02
4.03
4.04
4.05
4.06
4.07
4.09
4.11
4.12
6.98
6.95
6.92
6.90
6.88
6.86
6.85
6.84
6.84
6.83
6.83
6.84
6.84
6.85
6.85
7.13
7.10
7.07
7.04
7.03
7.01
7.00
6.99
6.98
6.98
6.98
6.98
6.98
6.99
6.99
9.46
9.39
9.33
9.27
9.22
9.18
9.14
9.10
9.07
9.04
9.01
8.99
8.97
8.95
8.93
10.32
10.24
10.18
10.12
10.06
10.01
9.96
9.92
9.88
9.85
9.82
9.79
9.77
9.76
9.75

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Follow the Storage Procedure above.
CLEANING PROCEDURE
General Soak in HI 7061 general cleaning solution for approxi-
mately 30 minutes.
Removal of films, dirt or deposits on the membrane/junction:
- Protein Soak in HI 7073 protein cleaning solution for 15 min.
- Inorganic Soak in HI 7074 inorganic cleaning solution for 15
minutes.
- Oil/grease Rinse with HI 7077 Oil & Fat cleaning solution.
IMPORTANT: After performing any of the cleaning procedures rinse
the electrode thoroughly with distilled water, refill the reference cham-
ber with fresh electrolyte (not necessary for gel-filled electrodes) and
soak the electrode in HI 70300 storage solution for at least 1 hour
before taking measurements.
TROUBLESHOOTING
Evaluate your electrode performance based on the following.
•Noise (Readings fluctuate up and down) could be due to:
– Clogged/Dirty Junction: Refer to the Cleaning Procedure
above.
– Loss of shielding due to low electrolyte level (in refillable
electrodes only): refill with fresh HI 7071 for single junction or
HI 7082 for double junction electrodes.
•Dry Membrane/Junction: soak in HI 70300 storage solution for
at least 1 hour.
•Drifting: soak the electrode tip in warm (approx. 50-60°C)
Hanna HI 7082 solution for one hour and rinse the tip with
distilled water. Refill with fresh HI 7071 for single junction
electrodes and HI 7082 for double junction electrodes (refillable
electrodes only).
•Low Slope: refer to the cleaning procedure above.
•No Slope: check the electrode for cracks in glass stem or bulb
and replace the electrode.
•Slow Response/Excessive Drift: soak the tip in HI 7061
solution for 30 minutes, rinse thoroughly in distilled water and
then follow the Cleaning Procedure above.
For refillable electrodes:
If the filling solution (electrolyte) is more than 2½ cm (1") below the
fill hole, add HI 7082 3.5M KCl electrolyte solution for double junction
or HI 7071 3.5M KCl+AgCl electrolyte solution for single junction
electrodes.
For a faster response, unscrew the fill hole screw during measure-
ments.
For AmpHel® electrodes:
If the electrode does not respond to pH changes, the battery is run
down and the electrode should be replaced.
MEASUREMENT
Rinse the electrode tip with distilled water. Immerse the tip (bottom 4
cm /1½") in 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.
STORAGE
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 protective cap with a few drops of HI 70300 storage
solution or, in its absence, electrolyte solution (HI 7071 for single
junction, or HI 7082 for double junction electrodes). Follow the
Preparation Procedure above before taking measurements.
NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER.
PERIODIC MAINTENANCE
Inspect electrode and cable. The cable used for connection to the
meter must be intact and there must be no points of broken
insulation on the cable or cracks 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.
For refillable electrodes:
Refill the reference chamber with fresh electrolyte (HI 7071 for single
junction or HI 7082 for double junction electrodes). Allow the electrode
to stand upright for 1 hour.

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ACCESSORIES
pH CALIBRATION SOLUTIONS
HI 70004P pH 4.01 buffer solution, 20 mL sachet, 25 pcs
HI 70007P pH 7.01 buffer solution, 20 mL sachet, 25 pcs
HI 70010P pH 10.01 buffer solution, 20 mL sachet, 25 pcs
HI 7004L pH 4.01 buffer solution, 500 mL
HI 7006L pH 6.86 buffer solution, 500 mL
HI 7007L pH 7.01 buffer solution, 500 mL
HI 7009L pH 9.18 buffer solution, 500 mL
HI 7010L pH 10.01 buffer solution, 500 mL
HI 8004L pH 4.01 buffer solution in FDA bottle, 500 mL
HI 8006L pH 6.86 buffer solution in FDA bottle, 500 mL
HI 8007L pH 7.01 buffer solution in FDA bottle, 500 mL
HI 8009L pH 9.18 buffer solution in FDA bottle, 500 mL
HI 8010L pH 10.01 buffer solution in FDA bottle, 500 mL
ELECTRODE STORAGE SOLUTION
HI 70300L Storage solution, 500 mL
HI 80300L Storage solution in FDA bottle, 500 mL
ELECTRODE CLEANING SOLUTIONS
HI 70000P Electrode rinsing solution, 20 mL sachet, 25 pcs
HI 7061L General cleaning solution, 500 mL
HI 7073L Protein cleaning solution, 500 mL
HI 7074L Inorganic cleaning solution, 500 mL
HI 7077L Oil & Fat cleaning solution, 500 mL
HI 8061L General cleaning solution in FDA bottle, 500 mL
HI 8073L Protein cleaning solution in FDA bottle, 500 mL
HI 8077L Oil & Fat Cleaning solution in FDA bottle, 500 mL
ELECTROLYTE SOLUTIONS
HI 7071 3.5M KCl + AgCl electrolyte solution, 4 x 30 mL, for
single junction electrodes
HI 7072 1M KNO3electrolyte solution, 4 x 30 mL
HI 7082 3.5M KCl electrolyte solution, 4 x 30 mL, for double
junction electrodes
HI 8071 3.5M KCl + AgCl electrolyte solution in FDA bottle, 4 x
30 mL, for single junction electrodes
HI 8072 1M KNO3electrolyte solution in FDA bottle, 4 x 30 mL
HI 8082 3.5M KCl electrolyte solution in FDA bottle, 4 x 30 mL,
for double junction electrodes
Alkaline Error
1.0 Mol L-1 Na+
0.1 Mol L-1 Na+
Sodium Ion Correction for the 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
TEMPERATURE-RESISTANCE CORRELATION
FOR HANNA pH SENSITIVE GLASS
The resistance of glass electrodes partially depends on the temperature.
The lower the temperature, the higher the resistance. It takes longer 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 10°C.
Since the resistance of the pH electrode is in the range of 200 Mohm,
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.
Typical Electrode Life
Ambient Temperature 1- 3 years
90 °C Less than 4 months
120°C Less than 1 month
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 the
alkaline error and causes the pH to be underestimated. Hanna's glass
formulations have the indicated characteristics.
-2
0
-2
0
-10
0
+1
0
+2
0
+
30
+4
0
+
50
+
60
+7
0
+
80
+
90
°
C
-10
-10
Ω
-10
-10
-10
-10
Ω
2x109
1x109
2x108
1x108
2x107
1x107
-20 -10 0 +10 +20+30+40 +50 +60 +70 +80 +90 °C

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HI 1330B
Glass body, semimicro, single junction, refillable, combination pH
electrode. Use: laboratory, vials.
HI 1331B
Glass body, semimicro, single junction, refillable, combination pH
electrode. Use: flasks.
HI 1230B
Plastic body, double junction, gel-filled, combination pH electrode.
Use: general, field.
HI 2031B
Glass body, semimicro, conic, refillable, combination pH electrode. Use:
semisolid products.
HI 1332B
Plastic body, double junction, refillable, combination pH electrode.
Use: general purpose.
ORP PRETREATMENT SOLUTIONS
HI 7091L Reducing pretreatment solution, 500 mL
HI 7092L Oxidizing pretreatment solution, 500 mL
pH ELECTRODES
All electrodes part numbers ending in B are supplied with a BNC
connector and 1 m (3.3') cable.
HI 1043B
Glass body, double junction, refillable, combination pH electrode.
Use: strong acid/alkali.
HI 1053B
Glass body, triple ceramic, conic shape, refillable, combination pH
electrode. Use: emulsions.
HI 1083B
Glass body, micro, Viscolene, non-refillable, combination pH electrode.
Use: biotechnology, micro titration.
HI 1131B
Glass body, single junction, refillable, combination pH electrode.
Use: general purpose.
120 mm
4.7"
12 mm
0.5"
9.5mm DIA
0.37"
"S" VERSION
HI 1043
120 mm
4.7"
12 mm
0.5"
"S" VERSION
HI 1053
120 mm
4
4
.
.
7
7
"
12 mm
0.5" 5 mm
0.2" 3 mm
0.12" 3.0 mm DIA
0.12"
HI 1083
120 mm
4.7"
5mm
0.2"
5mm DIA
0.2"
"S" VERSION
HI 1330
120 mm
4.7"
12 mm
0.5"
"
S
"
VERSION
HI 1230
75 mm
2.
95
"
6 mm
0.25"
"
S
"
VERSION
HI 2031
120 mm
4.7"
12 mm
0.5"
"S" VERSION
HI 1332
120 mm
4.7"
12 mm
0.5"
9.5mm DIA
0.37"
"S" VERSION
HI 1131
210 mm
8.25"
8 mm
0.3" 7.5mm DIA
0.29"
"S" VERSION
HI 1331

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18
FC 100B
PVDF body, double junction, refillable, combination pH electrode.
Use: general purpose for food industry.
FC 200B
PVDF body, open junction, conic, Viscolene, non-refillable, combination
pH electrode. Use: meat & cheese.
FC 210B
Glass body, double junction, conic, Viscolene, non-refillable, combina-
tion pH electrode. Use: milk, yogurt.
FC 220B
Glass body, triple-ceramic, single junction, refillable, combination pH
electrode. Use: food processing.
FC 911B
PVDF body, double junction, refillable with built-in amplifier, combi-
nation pH electrode. Use: very high humidity.
120 mm
4.7"
12 mm
0.5"
FC 100
75 mm
2.95"
6 mm
0.25"
FC 200
120 mm
4.7"
12 mm
0.5"
FC 210
120 mm
4.7"
12 mm
0.5"
9.5mm DIA
0.37"
FC 220
HI 1413B
Glass body, single junction, flat tip, Viscolene, non-refillable, combina-
tion pH electrode. Use: surface measurement.
ORP ELECTRODES
HI 3131B
Glass body, refillable, combination platinum ORP electrode.
Use: titration.
HI 3230B
Plastic body, gel-filled, combination platinum ORP electrode.
Use: general purpose.
HI 4430B
Plastic body, gel-filled, combination gold ORP electrode.
Use: general purpose.
110 mm
4.3"
12 mm
0.5"
FC 911
110 mm
4.3"
12 mm
0.5"
HI 1413
150 mm
5.9"
12 mm
0.5"
"S" VERSION
HI 3131
120 mm
4.7"
12 mm
0.5"
HI 3230
"S" VERSION
120 mm
4.7"
12 mm
0.5"
HI 4430
"S" VERSION