ADWA AD330 Manual de usuario

USER MANUAL

AD 330

EC/TDS/Temperature

Portable Meter

www.adwainstruments.com

2 3

DearCustomer,

Thank you for choosing an Adwa product.

Please read carefully this manual before starting operations.

This instrument is in compliance with the EMC Directive 89/

336/EEC and Low Voltage Directive 73/23/EEC for electrical

equipments.

For additional technical information, please e-mail us at

[email protected].

WARRANTY

Adwa warrants this product to be free of defects in material

and workmanship as stated in the operating manual. If repair

or adjustment is necessary and has not been the result of

abuse, misuse or improper handling within the warranty pe-

riod, please contact your dealer or nearest Adwa Office for the

RGA (Return Goods Authorization) number to put on the

outside of your package. Warranted service will be made with-

out charge. The meter is warranted for a period of 2 years,

while probes are warranted for 6 months. The warranty pe-

riod commences from the original date of sale. Warranty is

only valid when the product is used under normal conditions

and in accordance with the instruction manual. The warranty

is void if the instrument is repaired or serviced by unautho-

rized personnel, not used in accordance to the instructions,

or if non-Adwa accessories such as buffer solutions, probes,

etc. are used in conjunction with the meter. Adwa will not be

held responsible for any accident whether directly or indi-

rectly, caused by the use of this instrument.

PROBES AND SOLUTIONS

A76309 Conductivity probe with built-in tem-

perature sensor and 1 m cable

A70030P 12.88 mS/cm solution, 20 ml sachet, 25

pcs

A7030M 12.88mS/cm solution, 230 ml bottle

A70031P 1413 µS/cm solution, 20 ml sachet, 25

pcs

A7031M 1413µS/cm solution,230 mlbottle

A70033P 84 µS/cm solution, 20 ml sachet, 25 pcs

A7033M 84µS/cm solution, 230 ml bottle

A7035M 111.8mS/cm solution,230 ml bottle

A7034M 40 ppt (g/l) / 80.0 mS/cm solution, 230

mlbottle

A70442P 1500 ppm solution, 20 ml sachet, 25 pcs

A70442M 1500 ppm solution, 230 ml bottle

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AD330 is a heavy-duty portable microprocessor-based

instrument for measuring conductivity, TDS and tem-

perature.

The autoranging feature of the EC and TDS readings

automatically sets the instrument to the scale with the

highest resolution.

Measurements are compensated for temperature ef-

fect automatically (ATC) or manually (MTC).

The temperature compensation feature can also be

disabled to measure the actual conductivity.

The temperature coefficient is user selectable.

The instrument also features a measurement stability

indicator, GLP capability, and a user selectable ID

code to uniquely identify the instrument.

INTRODUCTION

Thismodel is supplied complete with:

•A76309conductivity probe with built-in temperature

sensor and 1 m cable

•1.5 V AA alkaline batteries (4 pcs)

•User manual

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TECHNICAL DATA

Range 0.00 to 19.99 µS/cm; 0.00 to 9.99 ppm

20.0 to 199.9 µS/cm; 10.0 to 99.9 ppm

200 to 1999 µS/cm; 100 to 999 ppm

2.00 to 19.99 mS/cm; 1.00 to 9.99 ppt

20.0 to 199.9 mS/cm; 10.0 to 99.9 ppt

-9.9 to 120.0°C

Resolution 0.01, 0.1, 1 µS/cm; ppm

0.01, 0.1 mS/cm; ppt

0.1°C

Accuracy ±1% f.s. (EC/TDS)

(@20°C/68°F) ±0.5°C

EC Calibration Offset at 0.00 µS/cm;

Slope at 1 point with 6 memorized values

(84.0, 1413 µS/cm; 5.00, 12.88, 80.0, 111.8 mS/cm)

or with custom value

TemperatureAutomatic or manual,

Compensation -9.9 to 120°C

TemperatureUser selectable

Coefficient from 0.00 to 10.00%/°C

TDS Factor User selectable from 0.40 to 1.00

(default value: 0.50)

Reference Temperature

Selectable from 15.0 to 30.0°C

Probe (included) A76309 EC probe

with built-in temperature sensor

Battery Type & Life

4x1.5 VAA (Alkaline batteries)

approx. 200 hours of continuous use

Auto-Off User selectable

5 minutes or disabled

Environment 0 to 50°C;

RH max 95% non-condensing

Dimensions 188 x 96 x 70 mm

Weight 460 g

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FRONT AND TOP PANELS 1. Probe holder

2. Connector for EC probe

3. ON/OFF key, to turn the instrument ON and OFF

4. HOLD/GLP key, to freeze the first stable reading

on the LCD and to display Good Laboratory Prac-

ticeinformation

5. CAL/SETUPkey,to enter/exit calibration andsetup

modes

6. CFM key, to confirm values

7. SHIFT key, to activate the key alternate function

Press and hold first the SHIFT key and then the

second desired key

8. Down arrow key, to manually decrease the value of

temperature or other parameters

9. Up arrow key, to manually increase the value of

temperature or other parameters

10. RANGE/“lock” key, to select measurement unit

or switch the focused data, and to freeze current

range on the LCD

11. Secondarydisplay

12. Primarydisplay

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• The meter is supplied complete with four 1.5 V AA

alkaline batteries. Remove the cover, unwrap the bat-

teries and install them while paying attention to their

polarity (also see “ Battery Replacement” section).

•To prepare the instrument for use, connect the EC probe

to the DIN connector. Tighten the threaded ring and

make sure the probe sleeve is properly inserted.

INSTRUMENT START-UP

•Turn the instrument on by pressing the

ON/OFF button.

•At start-up the display will show all used segments for

a few seconds (or while the button is held), followed

by the reference temperature value with “rEF” indi-

cation, then enters the measurement mode.

OPERATIONAL GUIDE

•To save battery life, the auto-off feature automatically

turns the meter off after 5 minutes with no button

pressed. This feature can be disabled by entering the

setupmode and selectingthe “AoFF” item(see “Setup”

section for details).

TAKING MEASUREMENTS

•Immerse the probe into the solution

to be tested. The sleeve holes must

be completely submerged.

•Tap the probe repeatedly to remove

any air bubbles that may be trapped

inside the sleeve.

•If needed, press RANGE until the de-

sired EC or TDS range is displayed.

•Allow for the reading to stabilize. The primary LCD

willshow the EC or TDS reading in the selected range,

while the temperature is displayed on the secondary

LCD.

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Notes:

•Ifthe meter displays only dashes “----”, the read-

ing is out of range.

•Ifthestabilityindicator(hourglass symbol) blinks,

the reading is not stable.

•Make sure the meter is calibrated before taking

measurements.

•If measurements are taken successively in dif-

ferent samples, for accurate reading it is recom-

mendedto rinse theprobe thoroughly withdeion-

ized water before immersing it into the sample.

•TDS reading is obtained by multiplying the EC

reading by the TDS factor, which has a default

value of 0.50. It is possible to change the TDS

factor within the 0.40 to 1.00 range by entering

setup mode and selecting the “tdS” item (see

“Setup” section for details).

The EC and TDS scales are autoranging. The meter

automatically sets the scale with the highest possible

resolution.

By pressing SHIFT and “lock”

keys, the autoranging feature is

disabled and the current range is

frozen on the LCD.

The µS, mS, ppm or ppt tag (de-

pending on the selected measure-

mentmode and range)starts blink-

ing.

To restore the autoranging option press the SHIFT and

“lock” keys again.

Note: Autoranging is automatically restored if range is

changed, if setup or calibration mode is entered,

or if meter is turned off and back on again.

AUTORANGING

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TEMPERATURE COMPENSATION

Three options are available for temperature compensa-

tion:

1. Automatic (ATC): the EC probe features a built-in

temperature sensor, which provides the temperature

reading to automatically compensate the EC/TDS

measurement (from -9.9 to 120.0°C), also using the

selected reference temperature.

2. Manual (MTC): the temperature value can be manu-

ally set using the arrow keys. The compensation is

referenced to the selected reference temperature.

While in MTC mode, the °C tag blinks on the second-

ary LCD.

3. No compensation (NOTC): the temperature is not

taken into account. The reading displayed on the pri-

mary LCD is the actual EC or TDS value.

Notes:

•The default compensation mode isATC.

•Temperature compensation setting can be ac-

cessed by entering the setup mode and selecting

the “tcE” item (see “Setup” section for details).

•If the temperature compensation is active, mea-

surements are compensated using the tempera-

ture coefficient (default value 1.90 %/°C).

To change the temperature coefficient, enter the

setup mode and select the “tc” item (see “Setup”

section for details).

•If the temperature reading is out of the -9.9 to

120.0°C interval and theATC option is selected,

thetemperature full scalevalue will bedisplayed,

together with the °C tag blinking.

•The reference temperature can be set from 15

to 30°C. When the reference temperature is

changed, the temperature coefficient must be

manually adjusted by the user.

For example, if αis the coefficient with refer-

ence temperature of 25°C, if changing the tem-

perature to 20°C, the new coefficient can be cal-

culatedwith the following formula:

β=α/(1-α/20)

If α=1.90%/°C, then β=2.10%/°C.

•Always set reference temperature to 25°C

when measuring TDS.

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STANDARD CALIBRATION

EC calibration is a one-point procedure. Selectable cali-

brationpointsare:0.00, 84.0and 1413 µS/cm, 5.00,12.88,

80.0 and 111.8 mS/cm.

•Rinse the probe with calibration so-

lution or deionized water, then im-

merse it into the solution. The sleeve

holesmustbecompletely submerged.

•Tap the probe repeatedly to remove

any air bubbles that may be trapped

inside the sleeve.

•To enter EC calibration, select the

EC range and press CAL key.

Note: TDSreadings areautomatically derived from the

EC readings and no specific calibration for TDS

is needed. Pressing CAL when TDS range is

selected has no effect.

•For zero calibration, simply leave the dry probe in the

air. The “CAL” and “BUFFER” tags light up.

EC CALIBRATION •The primary LCD displays the not calibrated EC read-

ing, while the secondary LCD shows one of the avail-

able standard values. The hourglass symbol blinks.

•If necessary, use the arrow keys to select the desired

standard value.

•When the reading is stable, the CFM tag starts blink-

ing. Press CFM to confirm calibration.

•The instrument displays the “Stor”and “Good”mes-

sages and returns to measurement mode.

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Notes:

•If the temperature is out of range, the “WRONG

BUFFER TEMP” message blinks on the LCD. If the

reading is too far from the expected value, “WRONG

BUFFER” blinks.

•For best results choose a standard value for calibra-

tion close to the sample to be measured.

•During standard calibration the meter uses 1.90%/°C

compensation coefficient. If the setup item “tc” has

been set to different value, when exiting calibration

mode, the displayed valued on the upper LCD might

be different from the nominal standard value.

CUSTOM CALIBRATION

It is also possible to perform EC calibration with custom

calibrationsolution.

•Immerse the probe in the custom calibration solution

and select the EC range. Press CAL to enter the EC

calibration and then the RANGE key to enter custom

EC calibration mode.

•The “CAL”, “BUFFER” and “Cal Point Custom” tags

light up. The primary LCD displays the not calibrated

temperature compensated EC reading, while the sec-

ondary LCD shows the temperature compensated EC

reading, factory calibrated with (cell value) k=1. The

hourglasssymbol blinks.

•Using the arrow keys, adjust the EC reading on the

primary LCD to the desired value.

•The maximum adjustment is ± 40% around the sec-

ondary LCD reading.

•When the reading is stable, the CFM tag starts blink-

ing on the LCD. Press CFM to confirm calibration.

•The instrument displays the “Stor”and “Good”mes-

sages and returns to measurement mode.

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