Hanna Instruments HI 9210N User Manual

Instruction Manual

HI 9210N

Portable Waterproof

pH Meter

www.hannainst.com

1

Dear Customer,
Thank you for choosing a Hanna Product.
Please read this instruction manual carefully before using the instrument.
If you require further technical information, do not hesitate to e-mail us at

[e-mail].
This instrument is in compliance with the directives.

WARRANTY

All Hanna Instruments meters 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 a period of six months.
This warranty is limited to repair or replacement free of charge.

Damage due to accident, 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 failure. 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 Customer Service department and then
send it with shipping costs prepaid. When shipping any instrument, make sure it is
properly packaged for complete protection.

TABLE OF CONTENTS

PRELIMINARY EXAMINATION ............................................................... 3

GENERAL DESCRIPTION ....................................................................... 3

FUNCTIONAL DESCRIPTION .................................................................4

SPECIFICATIONS.................................................................................. 5

OPERATIONAL GUIDE .......................................................................... 5

CALIBRATION...................................................................................... 6

pH VALUES AT VARIOUS TEMPERATURES ............................................ 8

ELECTRODE MAINTENANCE ................................................................... 9

BATTERY REPLACEMENT ..................................................................... 10

ACCESSORIES .................................................................................... 11

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
noticeable damage, notify your Dealer immediately.

The instrument is supplied complete with:

• HI 1217D pH electrode with built-in temperature sensor,
DIN connector and 1 m (3.3’) cable

• Batteries, 4 x 1.5V AA

• Instruction manual

Note: Save all packing materials until you are sure that the instrument is

functioning correctly. Any damaged or defective item must be
returned in its original packing materials together with the supplied
accessories.

GENERAL DESCRIPTION

The HI 9210N heavy-duty pH meter is designed to provide laboratory results
and accuracy under the harshest of industrial conditions.

The supplied HI 1217D rugged pH electrode, incorporates a temperature
sensor to provide both pH and temperature measurements with one probe.
The electrode signal is also preamplified and strengthened to give you
better protection against noise and electromagnetic interference, a common
phenomenon in industrial applications.

Calibration is manual to assure that the unit can be calibrated at any pH
buffer value. The trimmers for calibration are placed behind a protective
cover, that also keeps the meter watertight and prevents the calibration
from being tampered with.

A low voltage indicator appears on the screen to alert the user that there is only
a few hours of battery life left. Afterwards, the BEPS (Battery Error Prevention
System) will stop any false readings by shutting the meter off.

All rights are reserved. Reproduction in whole or in part is prohibited without the
written consent of the copyright owner.

Hanna Instruments reserves the right to modify the design, construction and

appearance of its products without advance notice.

23

FUNCTIONAL DESCRIPTION SPECIFICATIONS

1

2

6

pH

HI 9210N
ATC
pH METER

RANGE
pH:
°C:

0.00 - 14.00

0.0 -70.0

ON/OFF

RANGE

1) Battery cover

2) DIN connector for electrode

3) Offset calibration trimmer

4) Slope calibration trimmer

5) Temperature calibration trimmer

6) Mode indicator

7) Liquid Crystal Display

8) ON/OFF key, to turn the meter on or off

9) RANGE key, to visualize the temperature

3

Range 0.00 to 14.00 pH / 0.0 to 70.0°C
Resolution 0.01 pH / 0.1°C

4
5

Accuracy (@20°C/68°F) ±0.02 pH / ±0.5°C
pH Calibration Manual, 2 point, through offset & slope trimmers

Offset: ±1 pH / Slope: 85 to 105%

Temperature Compensation Automatic, 0 to 70°C
Electrode HI 1217D, with built-in temperature sensor and amplifier,

DIN connector and 1 m (3.3’) cable (included)

Battery Type 4 x 1.5V AA
Battery Life Approx. 2000 hours of continuous use

7

Environment 0 to 50°C (32 to 122°F); RH max 100%
Dimensions 196 x 80 x 60 mm (7.7x3.1x2.4’’)
Weight 500 g (1.1 lb.)

OPERATIONAL GUIDE

8
9

• The meter is supplied complete with batteries. Remove the back cover
and install the batteries, while paying attention to their polarity.

• For better accuracy, make sure that the instrument is calibrated (see
“Calibration” section for details).

• Connect the HI 1217D electrode to the DIN connector on the top of the
instrument and press the ON/OFF key.

• To take a pH measurement, remove the electrode protective cap and
simply submerge the tip (4cm/1½") of the electrode into the sample.

• If necessary, press the RANGE key until the display changes to the pH
mode, and allow for the electrode to adjust and stabilize.

• Since the pH electrode also features a built-in temperature sensor, pH
measurements are automatically adjusted for the temperature effect.

• To take temperature measurements, press the RANGE key to enter
temperature mode, dip the supplied electrode (with built-in temperature
sensor) in the sample and allow for the reading to stabilize.

• After use, switch the instrument off, rinse the electrode with clean water
and store it with a few drops of storage (HI 70300) or pH 7 buffer
solution in the protective cap.

45

CALIBRATION

For best accuracy, it is recommended to calibrate the instrument frequently.
In addition a pH calibration should be performed:

a) Whenever the pH electrode or the batteries are replaced
b) At least once a month
c) After testing aggressive chemicals
d) When extreme accuracy is required

PREPARATION

Pour small quantities of pH 7.01 and pH 4.01 (or pH 10.01) solution into
two clean beakers. For an accurate calibration, use two beakers for each
buffer solution, the first one for rinsing the electrode and the second one for
calibration.

For accurate readings, use pH 7.01 & pH 4.01 buffers if you are going to
measure acidic solutions, or pH 7.01 & pH 10.01 for alkaline samples.

PROCEDURE

• Remove the protective cap from the electrode, rinse it with some pH

7.01 solution, then dip it (at least 4 cm/1½") in pH 7.01 buffer. Stir
briefly and wait for the reading to stabilize.

• To access the calibration trimmers, unscrew the protective cap on the top
of the meter, near the electrode connector.

• Adjust the OFFSET trimmer until the LCD shows the buffer pH value at
the current temperature (see “pH values at various temperatures”
table). Press RANGE to read the buffer temperature.

pH

• pH calibration is now complete. Replace the trimmer cover and tighten
it to ensure a proper seal against water and humidity ingress.

Note: The meter also allows the user to calibrate the offset point of the

temperature sensor. For this purpose, immerse the HI 1217D
electrode in a solution together with a high precision reference
thermometer. Then turn the temperature calibration trimmer (#5
at page 4) until the meter displays the temperature of the solution.

pH

• Rinse the electrode and dip it into pH 4.01 (or pH 10.01) buffer. Stir
gently and wait for the display to stabilize.

• Adjust the SLOPE trimmer until the LCD displays the buffer pH value at
the measured temperature.

67

pH VALUES AT VARIOUS TEMPERATURES

ELECTRODE MAINTENANCE

Temperature has an effect on pH. The calibration buffer solutions are
affected by temperature changes to a lesser degree than normal solutions.

For pH calibration, please refer to the following chart.

TEMP pH VALUES

°C °F 4.01 6.86 7.01 9.18 10.01

0

32

4.01

6.98

7.13

9.46

10.32

5

41

4.00

6.95

7.10

9.39

10.24

10

50

4.00

6.92

7.07

9.33

10.18

15

59

4.00

6.90

7.04

9.27

10.12

20

68

4.00

6.88

7.03

9.22

10.06

25

77

4.01

6.86

7.01

9.18

10.01

30

86

4.02

6.85

7.00

9.14

9.96

35

95

4.03

6.84

6.99

9.10

9.92

40

104

4.04

6.84

6.98

9.07

9.88

45

113

4.05

6.83

6.98

9.04

9.85

50

122

4.06

6.83

6.98

9.01

9.82

55

131

4.07

6.84

6.98

8.99

9.79

60

140

4.09

6.84

6.98

8.97

9.77

65

149

4.11

6.85

6.99

8.95

9.76

70

158

4.12

6.85

6.99

8.93

9.75

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 pH 4.06, 6.98 or 9.82.

PREPARATION

Remove the protective cap.
DO NOT BE ALARMED IF ANY 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.

MEASUREMENT

Rinse the electrode tip with distilled water. Immerse the tip (at least 4 cm)
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 solution in the protective cap with a few drops of HI 70300
storage solution. Follow the Preparation Procedure above before taking
measurements.

Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER.

PERIODIC MAINTENANCE

Inspect the electrode and the 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 with water.

CLEANING PROCEDURE

General Soak in HI 7061 general cleaning solution for approx. 30

minutes.

Removal of films, dirt or deposits on the membrane/junction:

- Protein Soak in HI 7073 protein cleaning solution for 15 minutes.

- Inorganic Soak in HI 7074 inorganic cleaning solution for 15 minutes.

- Oil/grease Rinse with HI 7077 oil & fat cleaning solution.

89

IMPORTANT: After performing any of the cleaning procedures, rinse the
electrode thoroughly with distilled water and soak it 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.

• Dry membrane/junction: Soak in HI 70300 storage solution for at
least one hour.

• Drifting: Soak the electrode tip in warm (approx. 50-60°C) HI 7082
solution for one hour and rinse the tip with distilled water.

• 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.

BATTERY REPLACEMENT

If the batteries become weak, the meter will
display a "V" on the LCD to warn the user that
only a few hours of working life are left.

HI 9210N is also supplied with BEPS (Battery Error Prevention System),
that automatically shuts the meter off when the battery level is too low to
ensure reliable readings.

Battery replacement must only take place in a non hazardous area and
using the battery types specified in this instruction manual.

To replace the batteries, remove the rear cover of
the instrument and replace all four 1.5V AA
batteries with new ones, while paying attention
to the correct polarity. Replace the cover and
tighten the screws.

The meter is reset every time the batteries are
removed. In case of any functional problems, the
meter can be reset by removing and reinstalling
the batteries.

V

ACCESSORIES

HI 1217D Amplified, gel filled pH electrode with built-in temperature

sensor, DIN connector and 1 m (3.3’) cable

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 bottle
HI 7006L pH 6.86 buffer solution, 500 mL bottle
HI 7007L pH 7.01 buffer solution, 500 mL bottle
HI 7009L pH 9.18 buffer solution, 500 mL bottle
HI 7010L pH 10.01 buffer solution, 500 mL bottle
HI 8004L pH 4.01 buffer solution, 500 mL FDA bottle
HI 8006L pH 6.86 buffer solution, 500 mL FDA bottle
HI 8007L pH 7.01 buffer solution, 500 mL FDA bottle
HI 8009L pH 9.18 buffer solution, 500 mL FDA bottle
HI 8010L pH 10.01 buffer solution, 500 mL FDA bottle
HI 70300L Storage solution, 500 mL bottle
HI 70000P Electrode rinse solution, 20 mL sachet, 25 pcs
HI 7061L General cleaning solution, 500 mL bottle
HI 7073L Protein cleaning solution, 500 mL bottle
HI 7074L Inorganic cleaning solution, 500 mL bottle
HI 7077L Oil & Fat cleaning solution, 500 mL bottle
HI 80300L Storage solution, 500 mL FDA bottle
HI 8061L General cleaning solution, 500 mL FDA bottle
HI 8073L Protein cleaning solution, 500 mL FDA bottle
HI 8077L Oil & Fat cleaning solution, 500 mL FDA bottle
HI 721317 Rugged carrying case
HI 76405 Electrode holder

10 11

SALES AND TECHNICAL SERVICE CONTACTS

Australia:

Tel. [phone] • Fax [phone]

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Tel. [phone] • Fax [phone]

Egypt:

Tel. & Fax [phone]

Germany:

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Greece:

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Indonesia:

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Japan:

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Korea:

Tel. [phone] • Fax [phone]

Malaysia:

Tel. [phone] • Fax [phone]

Singapore:

Tel. [phone] • Fax [phone]

South Africa:

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Taiwan:

Tel. [phone] • Fax [phone]

Thailand:

Tel. [phone] • Fax [phone]

United Kingdom:

Tel. [phone] • Fax [phone]

USA:

Tel. [phone] • Fax [phone]

For e-mail contacts and complete list of Sales and Tech­nical offices, please see www.hannainst.com

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MAN9210N 05/05