Hanna Instruments EC 214 Manuale utente

EC214

EC215 • EC215R

Multi-Range

Conductivity Meters

for Laboratories

Instruction Manual

www.hannainst.com

PRELIMINARY EXAMINATION

EC 214 and EC 215 are bench top multi-range conductivity meters for

the laboratory.

Four measurement ranges ensure the highest resolution and precision for

your measuring requirements.

Single point calibration is performed manually simply by adjusting a

knob on the front of the meter.

Temperature compensation of the readings is automatic for the EC 215

models, thanks to the temperature sensor incorporated in probe, with

userselectable temperature coefficient.

With EC 214 the temperature compensation is manual and the tempe-

rature value can be also set with a knob.

The rugged probe with platinum 4-ring sensor responds faster than

conventional stainless steel models and can be also used for measuring

highly acidic or alkaline samples, or at high temperature.

In addition, the EC 215R model offers analog output of 0 to 5V that

represents the full conductivity scale across all 4 ranges.

GENERAL DESCRIPTION

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 correct operation.

If you need additional technical information, do not hesitate to e-mail

us at [email protected].

These instruments are in compliance with the directives.

TABLE OF CONTENTS

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:

•4-ring conductivity probe with 1 m (3.3’) cable

• HI 76300 for EC 214

• HI 76303 for EC 215 and EC 215R

•12 Vdc adapter

•Instruction manual

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

functions correctly. All defective items must be returned in the

original packing with the supplied accessories.

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

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

FUNCTIONAL DESCRIPTION EC 214 ............................................. 4

SPECIFICATIONS EC 214 ............................................................. 5

FUNCTIONAL DESCRIPTION EC 215 ............................................. 6

SPECIFICATIONS EC 215 ............................................................. 7

OPERATIONAL GUIDE .................................................................. 8

CALIBRATION ............................................................................ 10

CONDUCTIVITY VS. TEMPERATURE CHART................................... 13

DETERMINATION OF THE TEMPERATURE

COEFFICIENT OF A SOLUTION (EC 215) ..................................... 14

PROBE MAINTENANCE ............................................................... 15

ACCESSORIES ............................................................................ 16

WARRANTY ............................................................................... 18

CE DECLARATION OF CONFORMITY............................................. 19

SPECIFICATIONS EC 214

1) Liquid Crystal Display (LCD)

2) Conductivity calibration knob

3) 199.9 μS key for range selection

4) 19.99 mS key for range selection

5) 199.9 mS key for range selection

6) 1999 μS key for range selection

7) COND/°C key, to select conductivity reading or temperature

setting for manual compensation

8) Temperature setting knob for manual compensation

9) ON/OFF switch

10) Power adapter socket

11) Probe connector

FUNCTIONAL DESCRIPTION EC 214

Range 0.0 to 199.9 μS/cm / 0 to 1999 μS/cm

0.00 to 19.99 mS/cm / 0.0 to 199.9 mS/cm

Resolution 0.1 μS/cm / 1 μS/cm

0.01 mS/cm / 0.1 mS/cm

Accuracy (@20°C/68°F)

±1% FS (excluding probe error)

Typical EMC Deviation ±1% F.S.

Calibration Manual, single point, through front knob

Temperature Compensation

Manual, 0 to 50°C (32 to 122°F) with β=2%/°C

Probe HI 76300,platinum 4-ring sensor,

with 1 m (3.3') cable (included)

Power Supply 12 Vdc (power adapter included)

Environment 0 to 50°C (32 to 122°F);

RH max 95% non-condensing

Dimensions 240 x 182 x 74 mm (9.4 x 7.1 x 2.9")

Weight 1.0 kg (2.2 lb.)

FUNCTIONAL DESCRIPTION EC 215 SPECIFICATIONS EC 215

1) Liquid Crystal Display (LCD)

2) Conductivity calibration knob

3) 199.9 μS key for range selection

4) 19.99 mS key for range selection

5) 199.9 mS key for range selection

6) 1999 μS key for range selection

7) Temperature coefficient setting knob

8) ON/OFF switch

9) Power adapter socket

10) Probe connector

11) Analog output (EC 215R only)

Range 0.0 to 199.9 μS/cm / 0 to 1999 μS/cm

0.00 to 19.99 mS/cm / 0.0 to 199.9 mS/cm

Resolution 0.1 μS/cm / 1 μS/cm

0.01 mS/cm / 0.1 mS/cm

Accuracy (@20°C/68°F)

±1% F.S. (excluding probe error)

Typical EMC Deviation ±1% F.S.

Calibration Manual, single point, through front knob

Temperature Compensation

Automatic, 0 to 50°C (32 to 122°F)

with βadjustable from 0 to 2.5%/°C

Probe (included) HI 76303, platinum 4-ring sensor,

built-in temperature sensor and 1 m (3.3') cable

Analog Output (EC 215R only)

0 to 5 Vcc not isolated output;

accuracy ±0.1% of reading;

resolution ±2.5 mV

Power Supply 12 Vdc (power adapter included)

Environment 0 to 50°C (32 to 122°F);

RH max 95% non-condensing

Dimensions 240 x 182 x 74 mm (9.4 x 7.1 x 2.9")

Weight 1.0 kg (2.2 lb.)

Power connection

Plug the 12 Vdc adapter into the power supply socket.

Note: Make sure the main line is protected by a fuse.

Probe connection

Connect the conductivity probe to the proper socket on the rear panel.

Note: Make sure that the instrument has been calibrated before

taking any measurement (see “Calibration” section).

Note: If possible, use plastic beakers to minimize EMC interferences.

TAKING CONDUCTIVITY MEASUREMENTS WITH EC214

•Switch the instrument on by pressing ON/OFF.

•Immerse the probe in the solution while com-

pletely submerging the holes of the sleeve. Tap

the probe lightly on the bottom of the beaker

to remove any air bubbles trapped inside the

sleeve. Measure the solution temperature with

a Checktemp or another accurate thermom-

eter.

•Press the “COND/°C” key to select temperature

setting.

•Adjust the “TEMPERATURE” knob to display the temperature of

the solution on the LCD.

•Press the “COND/°C” key to select conductivity

reading.

•Select the appropriate conductivity range.

OPERATIONAL GUIDE Note: If the display shows "1", there is an over-range condition.

Select the next higher range.

•Allow a few minutes for the reading to stabilize. The LCD will

display the temperature compensated conductivity reading.

TAKING CONDUCTIVITY MEASUREMENTS WITH EC215

•Switch the instrument on by pressing ON/OFF.

•Immerse the probe in the solution while com-

pletely submerging the holes of the sleeve. Tap

the probe lightly on the bottom of the beaker to

remove any air bubbles trapped inside the

sleeve.

•Adjust the "TEMPERATURE COEFFICIENT" knob to the temperature

coefficient value of the solution (see “Determination of the Tem-

perature Coefficient of a Solution” section for details).

•Select the appropriate conductivity range.

Note: If the display shows "1", there is an over-range condition.

Select the next higher range.

•Allow a few minutes for the reading to stabilize. The LCD will

display the temperature compensated conductivity reading.

• Press “COND/°C” to select conductivity read-

ing and select the appropriate range:

"199.9 μS" for HI 7033

"1999μS" for HI 7031

"19.99 mS" for HI 7030

"199.9 mS" for HI 7034

Note: If the display shows "1", there is an over-range condition.

Select the next higher range.

•Allow a few minutes for the reading to stabilize, then adjust the

“CALIBRATION” knob to read the calibration solution conductivity

value at 25°C (77°F), e.g. 12.88 mS/cm.

• All subsequent measurements will be referenced to 25°C (77°F).

• To reference the measurements to 20°C (68°F), adjust the

“CALIBRATION” knob to read the calibration solution conductivity

value at 20°C (68°F), e.g. 11.67 mS/cm. See the “Conductivity

vs. Temperature Chart” on page 13.

• Calibration is now complete and the instrument is ready for use.

PROCEDURE FOR EC215

• Pour a small quantity of the appropriate

calibration solution, e.g. HI 7030 (12.88

mS/cm @ 25°C), into a plastic beaker.

• Immerse the probe in the solution while

completely submerging the holes of the

sleeve. Tap the probe lightly on the bottom

of the beaker to remove any air bubbles

trapped inside the sleeve.

• Adjust the "TEMPERATURE COEFFICIENT" knob to 2%/°C.

The instrument should be calibrated at least once a month, or when

the probe is changed.

INITIAL PREPARATION

For better accuracy of measurements it is recommended to use the

calibration solution with a conductivity value as close as possible to

the sample to be measured. See the “Accessories” section for a

complete list of available HANNA calibration solution.

Rinse the probe thoroughly in distilled water.

If possible, use plastic beakers to minimize any EMC interferences.

PROCEDURE FOR EC214

• Pour a small quantity of the appropriate

calibration solution, e.g. HI 7030 (12.88

mS/cm @ 25°C), into a plastic beaker.

• Immerse the probe in the solution while

completely submerging the holes of the

sleeve. Tap the probe lightly on the bot-

tom of the beaker to remove any air

bubbles trapped inside the sleeve. Mea-

sure the solution temperature with a

Checktemp or another accurate thermom-

eter.

• Press the “COND/°C” key to select tem-

perature setting.

• Adjust the “TEMPERATURE” knob to display the temperature of

the solution on the LCD.

HI 7030

CALIBRATION

HI 7030

• Select the appropriate range:

"199.9 μS" for HI 7033

"1999μS" for HI 7031

"19.99 mS" for HI 7030

"199.9 mS" for HI 7034

Note: If the display shows "1", there is an over-range condition.

Select the next higher range.

• Allow a few minutes for the reading to stabilize, then adjust the

“CALIBRATION” knob to read the calibration solution conductivity

value at 25°C (77°F), e.g. 12.88 mS/cm.

• All subsequent measurements will be referenced to 25°C (77°F).

• To reference the measurements to 20°C (68°F), adjust the

“CALIBRATION” knob to read the calibration solution conductivity

value at 20°C (68°F), e.g. 11.67 mS/cm. See the “Conductivity

vs. Temperature Chart” on page 13.

• Calibration is now complete and the instrument is ready for use.

CONDUCTIVITY VERSUS

TEMPERATURE CHART

The conductivity of an aqueous solution is the measure of its ability to

carry an electrical current by means of ionic motion.

The conductivity invariably increases with increasing temperature.

It is affected by the type and number of ions in the solution and by

the viscosity of the solution itself. Both parameters are temperature

dependent. The dependency of conductivity on temperature is ex-

pressed as a relative change per degree Celsius at a particular

temperature, commonly as %/°C.

Since a small difference in temperature causes a large change in

conductivity, the readings are usually normalized at 25°C.

°C °F HI 7030 HI 7031 HI 7033 HI 7034 HI 7035 HI 7039

(μS/cm) (μS/cm) (μS/cm) (μS/cm) (μS/cm) (μS/cm)

0 32 7150 776 64 48300 65400 2760

5 41 8220 896 65 53500 74100 3180

10 50 9330 1020 67 59600 83200 3615

15 59 10480 1147 68 65400 92500 4063

16 60.8 10720 1173 70 67200 94400 4155

17 62.6 10950 1199 71 68500 96300 4245

18 64.4 11190 1225 73 69800 98200 4337

19 66.2 11430 1251 74 71300 100200 4429

20 68 11670 1278 76 72400 102100 4523

21 69.8 11910 1305 78 74000 104000 4617

22 71.6 12150 1332 79 75200 105900 4711

23 73.4 12390 1359 81 76500 107900 4805

24 75.2 12640 1386 82 78300 109800 4902

25 77 12880 1413 84 80000 111800 5000

26 78.8 13130 1440 86 81300 113800 5096

27 80.6 13370 1467 87 83000 115700 5190

28 82.4 13620 1494 89 84900 117700 5286

29 84.2 13870 1521 90 86300 119700 5383

30 86 14120 1548 92 88200 121800 5479

31 87.8 14370 1575 94 90000 123900 5575

EC 214 manually compensates for temperature differences with a

fixed coefficient of 2%/°C.

EC 215 automatically compensates for temperature differences, and

features an user-selectable coefficient that can be manually adjusted

through a front knob, from 0 (no compensation) to 2.5%/°C.

PROBE MAINTENANCE

After every series of measurements,

rinse the probe with tap water.

If a more thorough cleaning is re-

quired, remove the sleeve and clean

the probe with a cloth or a non-

abrasive detergent.

After cleaning the probe, always

re-calibrate the instrument.

The 4-ring platinum probe body is

made of glass. For this reason great

care while handling the probe must

be taken.

• Immerse the probe into a solution sample and adjust the

“TEMPERATURE COEFFICIENT” knob to 0% (no compensation).

• Condition sample and probe at 25°C, and note the conductivity

reading C25.

• Condition sample and probe to a temperature t°C (approximately

5°C to 10°C different from 25°C), and note the conductivity

reading Ct.

• The temperature coefficient (β)of the solution is then calculated

using the following formula:

β= 100 x (Ct- C25) / [(t - 25) x C25]

The above procedure is suitable for determining the temperature

coefficient in the laboratory where the temperature of the solution can

be determined and controlled.

If this is not possible, e.g. during on-site measurements, the following

procedure should be used:

• Immerse the probe into the test solution and turn the “TEMPERA-

TURE COEFFICIENT” knob to 0% (no compensation).

• Allow the conductivity reading to stabilize (the reading should not

change by more than ±0.2 mS within 1 minute) and record the

value, C.

• Repeat the procedure with a different solution temperature,

changed by more than 10°C. Wait for the reading to stabilize.

• Adjust the “TEMPERATURE COEFFICIENT” knob until the display

reads the previously recorded “C” value.

• The value indicated by the knob is the temperature coefficient of

the solution.

DETERMINATION OF THE TEMPERATURE

COEFFICIENT OF A SOLUTION (EC 215)

OTHER ACCESSORIES

HI 98501 ChecktempC electronic thermometer (range -

50.0 to 150.0°C)

HI 710005 115 Vac / 12 Vdc voltage adapter, US plug

HI 710006 230 Vac / 12 Vdc voltage adapter, European

plug

HI 740036 100 mL plastic beaker (6 pcs)

HI 740034 Cap for 100 mL beakers (6 pcs)

HI 76404 Probe holder

CONDUCTIVITY PROBES

HI 76300 Platinum 4-ring conductivity probe with 1 m

(3.3') cable (for EC214)

HI 76303 Platinum 4-ring conductivity probe with built-

in temperature sensor and 1 m (3.3') cable

(for EC215)

CONDUCTIVITY CALIBRATION SOLUTIONS

HI 7030M 12880 μS/cm, 230 mL bottle

HI 7030L 12880 μS/cm, 500 mL bottle

HI 8030L 12880 μS/cm, 500 mL FDA bottle

HI 7031M 1413 μS/cm, 230 mL bottle

HI 7031L 1413 μS/cm, 500 mL bottle

HI 8031L 1413 μS/cm, 500 mL FDA bottle

HI 7033M 84 μS/cm, 230 mL bottle

HI 7033L 84 μS/cm, 500 mL bottle

HI 8033L 84 μS/cm, 500 mL FDA bottle

HI 7034M 80000 μS/cm, 230 mL bottle

HI 7034L 80000 μS/cm, 500 mL bottle

HI 8034L 80000 μS/cm, 500 mL FDA bottle

HI 7035M 111800 μS/cm, 230 mL bottle

HI 7035L 111800 μS/cm, 500 mL bottle

HI 8035L 111800 μS/cm, 500 mL FDA bottle

HI 7039M 5000 μS/cm, 230 mL bottle

HI 7039L 5000 μS/cm, 500 mL bottle

HI 8039L 5000 μS/cm, 500 mL FDA bottle

PROBE MAINTENANCE SOLUTIONS

HI 7061M General cleaning solution, 230 mL bottle

HI 8061M General cleaning solution, 230 mL FDA bottle

HI 7061L General cleaning solution, 500 mL bottle

HI 8061L General cleaning solution, 500 mL FDA bottle

ACCESSORIES

CE DECLARATION OF CONFORMITY

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 area could cause unacceptable interferences to radio and TV

equipments, requiring the operator to take all necessary steps to correct interferences.

The metal band at the end of the sensor is sensitive to electrostatic discharges. Avoid touching this metal

band at all times. During calibration of instruments, ESD wrist straps should be worn to avoid possible

damage to the sensor by electrostatic discharge. Use plastic beakers to minimize any EMC interferences.

Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC

performance.

To avoid electrical shock, do not use these instruments when voltages at the measurement surface exceed 24

Vac or 60 Vdc.

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

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 the probes are guaranteed for six months.

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

Damages 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.

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.

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