Bante Instruments DDS-12DW Manuale utente

DDS-12DW Benchtop Conductivity Meter

USER MANUAL

Bante Instruments Inc.

1IOverview

Introduction

Thank you for selecting the DDS-12DW benchtop conductivity meter.

This user manual provides a step-by-step guide to help you operate

the meter, please carefully read the following instructions before use.

Any use outside of these instructions may invalidate your warranty

and cause permanent damage to the meter.

Environmental Conditions

Before unpacking, ensure that current environmental conditions meet

the following requirements.

•Relative humidity is less than 80%

•Ambient temperature between 0° C (32° F) and 50° C (122° F)

•No potential electromagnetic interference

•No corrosive gas exists

Packing List

The following list describes all components of the meter. If any items

are missing or damaged, contact the supplier immediately.

DDS-12DW meter

Electrode arm

9V DC power adapter

CON-1 conductivity electrode

TP-10K temperature probe

Conductivity standard solutions 84 µ S/cm, 1413 µ S/cm, 12.88 mS/cm

Meter Overview

1 Sensor connections

2 Base plate of electrode arm

3 Display

4 Membrane keypad

Connectors

1 Socket for conductivity electrode (6-pin mini DIN)

2 Socket for temperature probe (3.5 mm jack)

3 Socket for power adapter

Display

Icon

Description

Indicates that the meter is in the measurement mode

Indicates that the meter is in the calibration mode

Indicates that the meter is in the setup mode

Indicates that the measurement is locked

Indicates that the automatic temperature compensation

is enabled

Keypad

Overview I2

Key

Function

•Switch the meter on or off

•Lock or unlock the measurement

•Exit the calibration, settings and return to the

measurement mode

Start calibration

Press and hold the key to enter the setup menu

Set the temperature

Increase value or scroll up through a list of

options

Decrease value or scroll down through a list of

options

Confirm the calibration or displayed option

Installing the Electrode Holder

Take out the electrode arm from the accessory box. The base plate of

electrode arm has a circular hole, the electrode arm has a connecting

rod. Insert the connecting rod into the circular hole and swivel the

electrode arm 90 degrees. The electrode holder is now ready to swing

into desired position.

Adjusting the Electrode Arm

After installation, if the electrode arm automatically rises or falls, you

are able to adjust the screw until arm locate at any position.

1. Remove the plastic cover from the right side of the electrode

arm.

2. Use the screwdriver to tighten the screw moderately.

3. Insert the plastic cover to previous position.

Connection

Connecting the Conductivity Electrode

1.1 Take out the electrode from packaging. Follow the steps below

to place electrode into the left or right side of the electrode arm.

1.2 Insert 6-pin connector into the connector socket labeled COND.

Ensure the connector is fully seated.

1.3 After the connection is completed, DO NOT pull on the cable.

Always make sure that the connector is clean and dry.

3IOverview

Connecting the Temperature Probe

2.1 Place the temperature probe into the circular hole located at the

center of the electrode arm.

2.2 Insert the jack plug to the connector socket labeled ATC. Ensure

the connector is fully seated.

Connecting the Power Adapter

3.1 Insert the connector of power adapter to the power socket.

3.2 Plug the 9V DC power adapter into the wall outlet.

Prior to Use

Soak the conductivity electrode for about 10 minutes in tap water to

remove dirt and oil stains on the sensor surface.

10 minutes

Switching the Meter On and Off

•Press the Meas key for about 3 seconds and release to switch

on the meter.

•Press and hold the Meas key to switch off the meter.

Meter Setup

The 12DW meter contains an integrated setup menu for customizing

the displayed option to meet measurement requirements. The

following table describes the functions of each menu item.

Menu Item

Option and Description

Cell Constant

Set the cell constant to match connected conductivity

electrode.

K = 0.1

K = 1 (default)

K = 10

Custom

Calibration Points

Set the number of calibration points.

1 point (default)

2 points

3 points

Temperature Coefficient

Set the temperature coefficient for linear temperature

compensation.

0.0 to 9.9%/° C (default 2.1)

Setup I4

Measurement Unit

Set the default temperature unit.

Degrees Celsius (default)

Degrees Fahrenheit

Auto-Hold

If enabled, the meter will automatically sense and

lock the measurement endpoint.

Enable

Disable (default)

Auto-Power Off

If enabled, the meter will automatically switch off

if no key is pressed within 3 hours.

Enable

Disable (default)

Factory Reset

Reset the meter to factory default settings. Note,

the meter must be recalibrated.

Enable

Disable (default)

Setting the Default Option

1. In the measurement mode, press and hold the key to enter the

setup menu.

2. Press the / key to select an option, press the Enter key to

confirm and switch to the next menu item.

3. Repeat the steps above until the meter returns to the

measurement mode.

To exit the setup menu without saving changes, press the Meas key.

Temperature Compensation

The temperature compensation has a large effect on the conductivity

measurement. If enabled, the meter will use the measured conductivity

and temperature readings to calculate the results and automatically

compensate to the selected reference temperature. If the temperature

coefficient is set to 0, the temperature compensation will be disabled

and the meter only shows the actual conductivity at the measured

temperature.

Automatic Temperature Compensation

Connect the temperature probe to meter, the ATC icon appears on the

display, the meter is now switched to the automatic temperature

compensation mode.

Refer to the Connecting the Temperature Probe section on page

Manual Temperature Compensation

If the meter does not detect a temperature probe, the degrees Celsius

icon (°C) will show on the display indicating the meter is switched to

the manual temperature compensation mode. To set the temperature

value follow the steps below.

1. Press the °Ckey to enter the temperature setting.

2. Press the / key to modify the temperature value.

3. Press the Enter key to save.

Press and hold the / key will make the value change faster.

Selecting a Conductivity Electrode

The 12DW meter is capable of using three types of the conductivity

electrodes. Before the calibration and measurement, ensure that you

have selected a suitable electrode according to the anticipated sample

conductivity. The following table lists the selectable electrode and its

effective measurement ranges.

Electrode

Measurement Range

Cell Constant

CON-0.1

0.5 to 100 µ S/cm

K = 0.1

CON-1

10 µ S/cm to 20 mS/cm

K = 1

CON-10

100 µ S/cm to 200 mS/cm

K = 10

Option

Menu item

5ICalibration

Conductivity Calibration

Automatic Calibration

The 12DW meter allows 1 to 3 points conductivity calibration. Before

calibration, ensure that selected cell constant (K=0.1, 1, 10) matches

connected electrode. If you have selected the manual calibration

(), the meter will wait to enter a cell constant.

For better accuracy, we recommend to perform 3 points calibration or

select a standard solution closest to the sample conductivity you are

measuring. The meter will automatically detect the standard solution

and prompt the user to perform the calibration. The following table

shows the default standard solution for each measurement range.

Measurement Range

Default Standard Solution

0 to 20 µ S/cm

10 µ S/cm

20 to 200 µ S/cm

84 µ S/cm

200 to 2000 µ S/cm

1413 µ S/cm

2 to 20 mS/cm

12.88 mS/cm

20 to 200 mS/cm

111.8 mS/cm

If you have changed the conductivity electrode, the meter must be

recalibrated. Every electrode has a different cell constant.

Single Point Calibration

Ensure that you have selected 1 point calibration in the setup menu.

1.1 Press the Cal key, the display shows ----/CAL1, the meter waits

for recognizing the standard solution.

1.2 Rinse the conductivity electrode with distilled water, then rinse

with a small amount of standard solution.

1.3 Place the electrode (and temperature probe) into the standard

solution, stir gently to remove air bubbles trapped in the slot of

the sensor.

The meter will automatically show the calibration standard (e.g.,

1413 µ S/cm).

1.4 Press the Enter key, the default calibration value begins flashing.

1.5 If necessary, press the / key to modify the calibration

value, press the Enter key to confirm and move to the next digit.

When the setting is completed, make sure that the displayed

value matches the calibration standard.

1.6 Press the Enter key, the Calibration icon begins flashing. When

the reading has stabilized, the meter will show and return

to the measurement mode.

Multipoint Calibration

Ensure that you have selected 2 or 3 points calibration in the setup

menu.

2.1 When the first calibration point is completed, the display will

show ----/CAL2. The meter prompts you to continue with second

point calibration.

2.2 Repeat steps 1.2 through 1.4 above until the meter shows .

Calibration is completed.

Manual Calibration

The 12DW meter provides an easy manual calibration mode. If the

conductivity standard solution is not ready, you are able to use this

method to calibrate the meter.

3.1 Press and hold the key to enter the setup menu.

3.2 Press the / key until the display shows / .

3.3 Press the Enter key, the default value begins flashing.

3.4 Press the / key to set the cell constant, press the Enter

key to confirm until the setting values stop flashing.

3.5 Press the Meas key to return to the measurement mode.

To exit the calibration without saving changes, press the Meas key.

Measurement I6

Temperature Calibration

The meter is supplied with a temperature probe for measurement and

temperature compensation. If the measured temperature reading

differs from that of an accurate thermometer, the probe needs to be

calibrated.

1. Connect the temperature probe to the meter and place into a

solution with a known accurate temperature.

2. Press the °Ckey to enter the temperature setting.

3. Press the / key to modify the temperature value.

4. Press the Enter key to save.

Measurement

1. Rinse the conductivity electrode with distilled water. Place the

electrode (and temperature probe) into the sample solution and

stir gently. Ensure that no air bubbles on the sensor surface.

2. If the Auto-Hold option in the setup menu is enabled, the meter

will automatically sense a stable reading and lock measurement,

the icon appears on the display. Press the Meas key to resume

measuring.

If the option is disabled, the meter will continuously measure

and update the readings.

3. Wait for the measurement to stabilize and record the reading.

4. When all of the samples have been measured, rinse the electrode

with distilled water.

If the meter shows ---- indicating the measurement exceeds the range,

replace a conductivity electrode that is appropriate for the conductivity

range of the sample solution you are measuring.

Electrode Maintenance

•Rinse the conductivity electrode thoroughly with distilled water

after use.

•Do not touch the platinum black coating on the sensor surface

and always keep it clean.

•If there is a build-up of solids inside the sensor, remove carefully,

then recalibrate the electrode.

•If you do not use the electrode for long periods, wipe clean with

a lint-free tissue and store the electrode in a dry and cool area.

•If your electrode is model CON-10, store the electrode with tap

water. This sensor needs to be kept wet always.

Platinum black coating

7IAppendix

Appendix

Preparation of Conductivity Standard Solutions

1. Place the analytical grade potassium chloride (KCl) in a beaker

and dry in an oven for about 3 hours at 105° C (221° F), then cool

to room temperature.

2. Add the reagent to a 1 liter volumetric flask according to the

instructions in table below.

Conductivity Standard

Reagent

Weight

84 µ S/cm

KCl

42.35 mg

1413 µ S/cm

KCl

745.5 mg

12.88 mS/cm

KCl

7.45 g

111.8 mS/cm

KCl

74.5 g

3. Fill the distilled water to the mark, mix the solution until the

reagent is completely dissolved.

Calculating the Cell Constant

1. Refer to the Manual Calibration section to set the cell constant

to 1.00.

2. Place the electrode into a standard solution and record the

reading.

3. Calculate the cell constant using the following formula.

K = × G

Where:

K = Cell constant

Cstd = Value of conductivity standard solution

Cmeas = Measured value

G = Raw cell constant (0.1, 1 or 10)

Calculating the Temperature Coefficient

1. Do not connect the temperature probe to the meter.

2. Press and hold the °Ckey to enter the temperature setting.

3. Press the / key to set the temperature to 25° C and press

the Enter key to confirm.

4. Place the conductivity electrode into the sample solution, record

the temperature value TAand conductivity value CTA.

5. Condition the sample solution and electrode to a temperature TB

that is about 5 to 10° C different from TA. Record the conductivity

value CTB.

6. Calculate the temperature coefficient using the formula below.

TC=

Where:

TC= Temperature coefficient

CTA = Conductivity at temperature A

CTB = Conductivity at temperature B

TA= Temperature A

TB= Temperature B

Optional Accessories

Conductivity Electrodes

Order Code

Description

CON-0.1

For measuring the pure water

CON-1

For general purpose applications

CON-10

For measuring the high conductivity liquids

Temperature Probe

Order Code

Description

TP-10K

3.5 mm jack plug, 1 m (3.3 ft) cable

Solutions

Order Code

Description

ECCS-84

Conductivity standard solution 84 µ S/cm, 480 ml

ECCS-1413

Conductivity standard solution 1413 µ S/cm, 480 ml

ECCS-1288

Conductivity standard solution 12.88 mS/cm, 480 ml

ECCS-1118

Conductivity standard solution 111.8 mS/cm, 480 ml

Power Supply

Order Code

Description

DCPA-9V

9V DC power adapter, european standard plug

Cstd

Cmeas

CTB –CTA

CTA (TB–25) –CTB (TA–25)

Appendix I8

Meter Specifications

Model

Bante 510

Conductivity

Range

0.01 µ S/cm to 200.0 mS/cm

Resolution

0.001, 0.01, 0.1, 1

Accuracy

± 1% F.S.

Calibration Points

1 to 3 points

Calibration Solutions

10 µ S/cm, 84 µ S/cm, 1413 µ S/cm,

12.88 mS/cm, 111.8 mS/cm

Temperature Compensation

0 to 100° C (32 to 212° F), manual or

automatic

Temperature Coefficient

0.0 to 9.9%/° C

Reference Temperature

25° C

Cell Constant

K = 0.1, 1, 10 or custom

Temperature

Range

0 to 105° C (32 to 221° F)

Resolution

0.1° C (0.1° F)

Accuracy

± 1° C (± 1.8° F)

Calibration Point

1 point

Other Specifications

Operating Temperature

0 to 50° C (32 to 122° F)

Storage Temperature

0 to 60° C (32 to 140° F)

Relative Humidity

< 80% (non-condensing)

Display

LCD, 135 × 75 mm (5.3 × 2.9 in.)

Power Requirements

9V/400mA DC power adapter

Auto-Off

3 hours after last key pressed

Dimensions

210 (L) × 205 (W) × 75 (H) mm,

(8.2 × 8.0 × 2.9 in.)

Weight

1.5 kg (3.3 lb)

Troubleshooting

Fault

Cause and Corrective Action

Electrode dried out.

Soak the conductivity electrode in tap water for

about 10 minutes.

Measurement exceeded the maximum range.

Check the electrode and sample.

Drifting erratic

readings

Check whether electrode is contaminated, clogged

or broken.

Setting value does not match calibration solution.

Reset the calibration value or check the calibration

solution.

Electrode is broken.

Replace the conductivity electrode.

The information in this document is subject to change without notice.

Disposal

This product is required to comply with the European Union’s Waste

Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC and

may not be disposed of in domestic waste. Please dispose of product

in accordance with local regulations at the collecting point specified

for electrical and electronic equipment.

Warranty

The warranty period for meter is one year from the date of shipment.

Above warranty does not cover the electrode and standard solutions.

Out of warranty products will be repaired on a charged basis.

The warranty on your meter shall not apply to defects resulting from:

•Improper or inadequate maintenance by customer

•Unauthorized modification or misuse

•Operation outside of the environment specifications of the

products.

For more information, please contact the supplier.

Office: 4715 Castlewood St., Sugar land, TX 77479, USA

Tel: (+1) 346-762-7358

E-mail: [email protected]

Factory: F3, Building 2, No.2185, Laifang Rd., Shanghai 201615, China

Tel: (+86) 21-6404-1598

E-mail: banteinstrument@hotmail.com

www.bante-china.com

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