Hanna Instruments HI 9811-0 User Manual

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Instruction Manual

HI 9811-0 • HI 9811-5

Portable

pH/EC/TDS/°C Meters

www.hannainst.com

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 tech@hannainst.com.

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.

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 9811-0

• HI 1285-5, pH/EC/TDS/°C probe, for HI 9811-5

• HI 70007, pH 7.01 sachet, 1 pc

• HI 70031, 1413 µS/cm sachet, 1 pc

• HI 70032, 1382 ppm (mg/L) 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 item must be returned in the original packing together with the supplied accessories.

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

GENERAL DESCRIPTION

HI 9811-0 and HI 9811-5 are the complete, versatile and rain-proof portable combined meters designed with utmost precision and simplicity. 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 9811-0 is a pH/EC/TDS meter designed for simplicity of use in taking pH, µS/cm and mg/L measurements. Suited for hydroponics, greenhouses, farming and ground water applications.

• HI 9811-5 offers all the features of HI 9811-0 with the addition of temperature measurement in the °C scale.

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) mg/L (TDS) selection key

8) °C (Temperature) selection key, for HI 9811-5 only

9) ON/OFF key

SPECIFICATIONS

Range pH 0.0 to 14.0

mg/L 0 to 3000

µS/cm 0 to 6000

°C 0.0 to 70.0 (HI 9811-5 only)

Resolution pH 0.1

mg/L 10

µS/cm 10

°C 0.1 (HI 9811-5 only)

Accuracy pH ±0.1 (@20°C/68°F) mg/L ±2% f.s.

µS/cm ±2% f.s.

°C ±0.5 (HI 9811-5 only)

Conversion Factor 0.5 Typical EMC pH ±0.1 Deviation mg/L ±2% f.s.

µS/cm ±2% f.s.

°C ±0.5 (HI 9811-5 only)

pH Calibration 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 with ß = 2%/°C

Probe (included) HI 1285-0 for HI 9811-0

HI 1285-5 for HI 9811-5

Battery Type 1 x 9V alkaline (IEC 6LR61) Life approx. 150 hours of continuous use Environment 0 to 50°C (32 to 122°F); 100% RH Dimensions 165 x 75 x 45 mm

(6.5 x 3.0 x 1.8")

Weight 180 g (6.3 oz.)

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.

• 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 9811-5 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.

• 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.

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.

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 9811-0, with a ChecktempC (or another accurate thermometer);

for HI 9811-5, 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).

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

4.01

6.98

7.13

9.46

10.32

4.00

6.95

7.10

9.39

10.24

4.00

6.92

7.07

9.33

10.18

4.00

6.90

7.04

9.27

10.12

4.00

6.88

7.03

9.22

10.06

4.01

6.86

7.01

9.18

10.01

4.02

6.85

7.00

9.14

9.96

4.03

6.84

6.99

9.10

9.92

104

4.04

6.84

6.98

9.07

9.88

113

4.05

6.83

6.98

9.04

9.85

122

4.06

6.83

6.98

9.01

9.82

131

4.07

6.84

6.98

8.99

9.79

140

4.09

6.84

6.98

8.97

9.77

149

4.11

6.85

6.99

8.95

9.76

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 4.0 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.

• The pH calibration is now complete.

EC/TDS CALIBRATION

BATTERY REPLACEMENT

Accessories needed:

• Use HI 70031 (1413 µS/cm) EC calibration solution or HI 70032 (1382 ppm, or mg/L) 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 "mg/L") key.

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

EC/TDS CONVERSION FACTOR

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.

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

Both HI 9811-0 and HI 9811-5 models have a fixed conversion factor set to 0.5. This means that 1 µS/cm is equal to 0.5 mg/L of TDS.

PROBE MAINTENANCE

ACCESSORIES

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.

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

Hanna Instruments HI 9811-0 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual