Instruction Manual

HI 9812-0 • HI 9812-5

Portable pH/EC/TDS/°C Meters

w w w . h a n n a i n s t . c o m

Dear Customer,

Thank you for choosing a Hanna product.

Please read this instruction manual carefully before using the meter.

This manual will provide you with the necessary information for correct use of the 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].

These instruments are in compliance with the directives.

WARRANTY

All Hanna Instruments meters are warranted for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. Probes are warranted for a period of six months.

This warranty is limited to repair or replacement free of charge.

Damages 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 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 ................................................................... 6 pH CALIBRATION ......................................................................... 8 pH VALUES AT VARIOUS TEMPERATURES ..................................... 9

EC/TDS CALIBRATION ................................................................. 10

EC/TDS CONVERSION FACTOR ..................................................... 10

BATTERY REPLACEMENT .............................................................. 11

PROBE MAINTENANCE ................................................................ 12

ACCESSORIES ............................................................................. 13

CE DECLARATION OF CONFORMITY .............................................. 14

2

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipment.

If noticeable damage is found, notify your Dealer.

Each meter is supplied with:

• Combination probe with 8-pin DIN connector & 1 m (3.3') cable:

• HI 1285-0, pH/EC/TDS probe, for HI 9812-0

• HI 1285-5, pH/EC/TDS/°C probe, for HI 9812-5

• HI 70007, pH 7.01 sachet, 1 pc

• HI 70031, 1413 µS/cm sachet, 1 pc

• HI 70032, 1382 ppm sachet, 1 pc

• HI 700661 cleaning solution sachet, 2 pcs

• Instruction manual

• 1 x 9V alkaline battery.

Note: Save all packing material until you are sure that the instrument functions correctly. Any defective items must be returned in the original packing together with the supplied accessories.

GENERAL DESCRIPTION

HI 9812-0 and HI 9812-5 are the complete, versatile and rain-proof portable combined meters specially dedicated to aquariums, fishfarming and seawater applications.

Both models provide measurements for pH, EC and TDS ranges, which are easily selectable through a membrane keyboard on the front panel.

Conductivity measurements are automatically compensated for temperature changes with a built-in temperature sensor. The temperature coefficient is fixed at 2%/°C.

• HI 9812-0 is a pH/EC/TDS meter designed for simplicity of use in taking pH, µS/cm and ppm measurements. Suited for hydroponics, greenhouses, farming and ground water applications.

• HI 9812-5 offers all the features of HI 9812-0 with the addition of temperature measurement in the °C scale.

3

FUNCTIONAL DESCRIPTION

1) 8-pin DIN connector for probe

2) Liquid Crystal Display

3) pH range selection key

4) µS/cm (EC) range selection key

5) EC/TDS calibration knob

6) pH offset calibration knob

7) ppm (TDS) selection key

8) °C (Temperature) selection key, for HI 9812-5 only

9) ON/OFF key

4

SPECIFICATIONS

Range pH ppm

µS/cm

°C

Resolution pH ppm

µS/cm

°C

Accuracy pH

(@20°C/68°F) ppm

µS/cm

°C

Conversion Factor

Typical EMC

Deviation pH ppm

0.0 to 14.0

0 to 1990

0 to 1990

0 to 60 (HI 9812-5 only)

0.1

10

10

1 (HI 9812-5 only)

±0.1

±2% f.s.

±2% f.s.

±1 (HI 9812-5 only)

0.5

±0.1

±2% f.s.

pH Calibration

µS/cm

°C

±2% f.s.

±1 (HI 9812-5 only)

Manual, 1-point through offset trimmer

EC/TDS Calibration Manual, 1-point through slope trimmer

EC/TDS Temperature Automatic from 0 to 50°C (32 to 122°F)

Compensation

Probe (included)

Battery Type

Life

Environment

Dimensions

with ß = 2%/°C

HI 1285-0 for HI 9812-0

HI 1285-5 for HI 9812-5

1 x 9V alkaline (IEC 6LR61) approx. 150 hours of continuous use

0 to 50°C (32 to 122°F); 100% RH

Weight

165 x 75 x 45 mm

(6.5 x 3.0 x 1.8")

180 g (6.3 oz.)

5

OPERATIONAL GUIDE

INITIAL PREPARATION

Each meter is supplied complete with a 9V battery. Remove the battery compartment cover on the back of the meter and install the battery while paying attention to its polarity.

Connect the probe to the DIN socket on the top of the meter by aligning the pins with the socket and pushing in the plug.

Always remove the electrode protective cap before taking any measurements and make sure the meter has been calibrated before taking any measurements.

Turn the meter on by pressing the ON/OFF key.

TAKING pH MEASUREMENTS

If the probe has been left dry, soak the tip in HI 70300 storage solution for a few minutes to reactivate it.

• To take a pH measurement simply submerge the tip (4cm/1½") of the probe into the sample to be tested.

• Select the pH mode.

• Stir briefly and wait a couple of minutes for the reading to adjust and stabilize. The display shows the pH value.

• If measurements are taken in different samples successively, it is recommended to rinse (clean) the probe thoroughly to eliminate cross-contamination. After cleaning, it is recommended to rinse the probe with some of the next sample to be measured.

TAKING EC/TDS MEASUREMENTS

• Immerse the tip of the probe (4cm/1½") into the sample to be tested. If possible, use plastic beakers or containers to minimize any EMC interference.

• Tap the probe lightly on the bottom of the beaker to remove any air bubbles which may be trapped inside the tip.

6

• Select the appropriate measurement range (EC or TDS).

• Wait a couple of minutes for the temperature sensor to reach thermal equilibrium. The display will then show the measurement automatically temperature compensated for temperature with the appropriate indication among the following:

"µS" symbol indicates the meter is in EC mode; no symbol indicates the meter is in

TDS mode.

TAKING TEMPERATURE MEASUREMENTS

(for HI 9812-5 only)

• Submerge the tip (4cm/1½") of the probe into the sample to be tested.

• Select the °C mode.

• Stir briefly and wait a couple of minutes for the reading to adjust and stabilize. The display shows the temperature value.

Note: If the display shows only a "1" on the far left hand side, the reading is out of range.

Note: It is recommended to clean often the probe with HI 700661

Cleaning Solution.

Note: After measurements have been completed, the instrument should be switched off, and the probe cleaned and covered with the protective cap.

7

pH CALIBRATION

For greatest accuracy, frequent calibration of the instrument is recommended. The instrument should be recalibrated for pH: a) Whenever the electrode is replaced.

b) At least once a month.

c) After testing aggressive chemicals.

d) Where extreme accuracy is required.

PREPARATION

Pour small quantities of pH 7.01 (HI 7007) or pH 4.01 (HI 7004) or pH 10.01 (HI 7010) solution into a clean beaker.

To obtain accurate readings, use pH 7.01 (HI 7007) if you are going to measure neutral or close to neutral samples, pH 4.01 (HI 7004) if you are going to measure acidic samples or pH 10.01 (HI 7010) for alkaline measurements.

If you need to calibrate to NBS standards, use pH 6.86 (HI 7006) instead of pH 7.01 and pH 9.18 (HI 7009) instead of pH 10.01.

PROCEDURE

• Connect the probe and switch the meter on, then press the "pH" key to display pH measurement.

• Remove the protective cap from the probe, rinse and immerse it in the buffer and stir gently. Wait a couple of minutes for the reading to stabilize.

• Take the temperature of the buffer solution, e.g. 10.0°C, as follow: for HI 9812-0, with a ChecktempC (or another accurate thermometer); for HI 9812-5, select the °C mode and read the displayed value.

• Adjust the pH calibration knob until the

LCD shows the pH value at the above temperature (see the pH versus temperature chart).

• The pH calibration is now complete.

8

Note: The probe should be submerged approximately 4 cm (1½") into the solution. The ChecktempC thermometer has to be located close to the probe.

Note: If turning the knob the needed value can not be reached, clean the probe (see the "Probe Maintenance" section).

If also after the probe cleaning the value can not be reached, replace the probe.

pH VALUES AT VARIOUS TEMPERATURES

For temperature compensation during calibration, please refer to the following chart.

TEMP pH VALUES

°C °F 4.01

6.86

7.01

9.18

10.01

104

113

122

131

140

149

158

68

77

86

95

32

41

50

59

60

65

70

40

45

50

55

20

25

30

35

10

15

0

5

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

9.07

9.04

9.01

8.99

8.97

8.95

8.93

9.22

9.18

9.14

9.10

9.46

9.39

9.33

9.27

9.88

9.85

9.82

9.79

9.77

9.76

9.75

10.32

10.24

10.18

10.12

10.06

10.01

9.96

9.92

For instance, if the buffer temperature is 25°C, the display should show pH 4.0 or 7.0 or 10.0.

If the buffer temperature is 10°C, the display should show pH 4.0 or

7.0 or 10.1.

9

EC/TDS CALIBRATION

Accessories needed:

• Use HI 70031 (1413 µS/cm) EC calibration solution or HI

70032 (1382 ppm) TDS calibration solution.

Note: The conversion between EC and TDS is made by a built-in circuit, hence it is requested to calibrate the meter only in EC or TDS range. The other range is thus automatically calibrated.

PROCEDURE

• Pour approximately 4 cm (1½") of a conductivity calibration solution (e.g. HI 70031) into a beaker. If possible, use plastic beaker to minimize any EMC interference.

• Immerse the probe in the solution.

• Wait for a couple of minutes for thermal equilibrium to be reached.

• Tap the probe on the bottom, then shake it lightly while rotating to make sure no air bubbles remain trapped inside the probe.

• Press the "µS/cm" (or "ppm") key.

• Turn the EC/TDS calibration knob until the display shows the EC or TDS reading at 25°C.

EC/TDS CONVERSION FACTOR

The TDS value in aqueous solutions is directly proportional to the conductivity. The ratio between the two parameters depends on the solution.

Both HI 9812-0 and HI 9812-5 models have a fixed conversion factor set to 0.5. This means that 1 µS/cm is equal to 0.5 ppm of

TDS.

10

BATTERY REPLACEMENT

These meters are powered by a 9V battery that is located on the rear of the instrument.

When the battery level is so low that it may cause unreliable measurements, the meter turns off.

It is recommended to replace the battery immediately.

Battery replacement must only take place in a nonhazardous area using a 9V alkaline battery.

Unscrew the three screws on the rear of the meter, remove the battery compartment cover and replace the 9V battery with a new one while paying attention to its polarity.

Make sure the battery contacts are tight and secure before replacing the cover.

11

PROBE MAINTENANCE

PERIODIC MAINTENANCE

Inspect the probe and the cable. The cable used for the connection to the meter must be intact and there must be no points of broken insulation on the cable or cracks on the probe stem or bulb.

Connector 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

For better accuracy in measurements and to ensure a good performance of the probe, a frequent cleaning is recommended.

For this purpose, soak it in Hanna HI 700661 Cleaning Solution for

5 minutes.

Note: For particular dirty (as for example protein, oil or grease) see the "Accessories" section for Hanna specific solutions.

Note: After cleaning the probe, it is recommended to recalibrate the meter. If it is not possible to calibrate, the probe has to be replaced with a new one.

Note: For field applications, it is always recommended to keep a spare probe handy. When anomalies are not resolved with simple maintenance, change the probe and recalibrate the meter.

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ACCESSORIES

PROBES

HI 1285-0 Combination, amplified pH/EC/TDS probe with built-in temperature sensor, 8-pin DIN connector and 1 m

(3.3') cable

HI 1285-5 Combination, amplified pH/EC/TDS/temperature probe with built-in temperature sensor, 8-pin DIN connector and 1 m (3.3') cable

pH BUFFER SOLUTIONS

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

CONDUCTIVITY & TDS CALIBRATION SOLUTIONS

HI 7031L 1413 µS/cm solution, 500 mL bottle

HI 7032L 1382 ppm (mg/L) solution, 500 mL bottle

OTHER SOLUTIONS

HI 700661P Cleaning Solution, 20 mL sachet (25 pcs)

HI 70300L Storage 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

OTHER ACCESSORIES

ChecktempC Electronic thermometer (-50.0 to 150.0°C)

HI 710015 Shockproof rubber boot, blue

HI 710016 Shockproof rubber boot, orange

HI 710022 Blue protective case

Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice.

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CE DECLARATION OF CONFORMITY HANNA PRODUCTS

• CALIBRATION AND MAINTENANCE SOLUTIONS

• CHEMICAL TEST KITS

• CHLORINE METERS

• CONDUCTIVITY/TDS METERS

• DISSOLVED OXYGEN METERS

• HYGROMETERS

• ION SPECIFIC METERS

• MAGNETIC STIRRERS

• Na/NaCl METERS

• pH/ORP/Na ELECTRODES

• PROBES (DO, µS/cm, RH, T, TDS)

• PUMPS

• REAGENTS

• SOFTWARE

• THERMOMETERS

• TITRATORS

• TRANSMITTERS

• TURBIDITY METERS

• Wide Range of Accessories

Most Hanna meters are available in the following formats:

• BENCH-TOP METERS

• POCKET-SIZE METERS

• PORTABLE METERS

• PRINTING/LOGGING METERS

• PROCESS METERS (Panel- and Wall-mounted)

• METERS FOR FOOD INDUSTRY

For additional information, contact your dealer or the nearest Hanna

Customer Service Center.

Recommendations for Users

Before using these products, make sure that they are entirely suitable for the environment in which they are used. Operation of these instruments in residential areas could cause unacceptable interferences to radio and TV equipment.

The glass bulb at the end of the electrode is sensitive to electrostatic discharges. Avoid touching this glass bulb at all times. During operation, ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic discharges.

Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance.

To avoid electrical shock, do not use these instruments when voltages at the measurement surface exceed

24VAC or 60VDC.

To avoid damages or burns, do not perform any measurement in microwave ovens.

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

15

SALES AND TECHNICAL SERVICE CONTACTS

Australia:

Tel. (03) 9769.0666 • Fax (03) 9769.0699

China:

Tel. (10) 88570068 • Fax (10) 88570060

Egypt:

Tel. & Fax (02) 2758.683

Germany:

Tel. (07851) 9129-0 • Fax (07851) 9129-99

Greece:

Tel. (210) 823.5192 • Fax (210) 884.0210

Indonesia:

Tel. (21) 4584.2941 • Fax (21) 4584.2942

Japan:

Tel. (03) 3258.9565 • Fax (03) 3258.9567

Korea:

Tel. (02) 2278.5147 • Fax (02) 2264.1729

Malaysia:

Tel. (603) 5638.9940 • Fax (603) 5638.9829

Singapore:

Tel. 6296.7118 • Fax 6291.6906

South Africa:

Tel. (011) 615.6076 • Fax (011) 615.8582

Taiwan:

Tel. 886.2.2739.3014 • Fax 886.2.2739.2983

Thailand:

Tel. 66.2619.0708 • Fax 66.2619.0061

United Kingdom:

Tel. (01525) 850.855 • Fax (01525) 853.668

USA:

Tel. (401) 765.7500 • Fax (401) 765.7575

For e-mail contacts and complete list of Sales and

Technical offices, please see www.hannainst.com