Elcometer 138 Bedienungsanleitung

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Elcometer 138

User Guide

Conductivity Meter

CONTENTS

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Section

Page

Overview

en-2

Box Contents

en-2

The Controls & Display

en-3

Using the Elcometer 138 Conductivity Meter

en-5

Taking a Reading

en-9

Care & Maintenance

en-11

Technical Specification

en-12

Spares & Accessories

en-13

Legal Notices & Regulatory Information

en-13

http://www.elcometer.com/images/stories/MSDS/Elcometer_138_1413uScm_Calibration_Solution.pdf

For the avoidance of doubt, please refer to the original English language version.

Weight: 50g (1.76 oz) - including sensor and batteries

Dimensions: 164 x 29 x 20mm (6.5 x 1.1 x 0.79")

A Material Safety Data Sheet for the Elcometer 138 Standard 1413μS/cm Calibration Solution is available to download via our website:

into any language, in any form or by any means (electronic, mechanical, magnetic, optical, manual or otherwise) without the prior written permission of Elcometer Limited.

1 OVERVIEW

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en-2

The Elcometer 138 Conductivity Meter can be used in accordance with the

following two test methods:

Ÿ ISO 8502-6 / ISO8502-9

Ÿ US NAVY PPI 63101-000 (Rev 27)

It can also be used in accordance with ISO 8502-11; AS 3894.6-A and SSPC Guide 15.

For IMO PSPC , the surface salts should be measured and recorded. The Elcometer 138 Conductivity

Meter can be used for this.

Incorporating a flat sensor, the Elcometer 138 Conductivity Meter enables

accurate measurement of the conductivity of a solution from a single drop of the

sample.

a International Maritime Organisation, Performance Standard for Protective Coatings.

2 BOX CONTENTS

Elcometer 138 Conductivity Meter & Sensor

Conditioning Solution; 14ml (0.47 fl oz)

Calibration Solution 1413µS/cm; 14ml (0.47 fl oz)

CR2032 Lithium Batteries; x2 (supplied fitted to the Elcometer 138)

User Guide

Note: The Elcometer 138 Conductivity Meter measures aqueous solutions. The meter is NOT designed to measure solids,

organic solvents, surfactant, oil, adhesive, alcohol, strong acids (pH: 0 to 2) or strong alkalis (pH: 12 to 14). The life of the

sensor will be extremely short if these substances are measured.

The Elcometer 138 Conductivity Meter is operated using 3 buttons and displays readings and other

information on the LCD screen.

MEAS

CAL BATT

°C

µS/cm

0000

910 11 12 13

3 THE CONTROLS & DISPLAY

ELCOMETER 138 CONDUCTIVITY METER OVERVIEW

Measurement Cell

Place a liquid sample in this cell to measure it with the electrode located on the bottom of

the cell.

Protection Cover

Protects the measurement cell and ﬂat sensor in storage.

Lithium Batteries

CR2032 x 2

MEAS Button

Sets the measurement mode (EC). View the ambient temperature measured with the

internal temperature sensor (to be used as a guide only). Switches from calibration mode

to measurement mode.

ON/OFF Button

Turns the meter On / Oﬀ.

Strap Eyelet

A strap can be attached here.

CAL Button

Starts calibration procedure.

Waterproof Gasket

Makes the meter waterproof.

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3 THE CONTROLS & DISPLAY (continued)

DISPLAY INDICATORS

Stability Icon

Illuminates when measured value is stabilised.

MEAS Icon

Illuminates when in measurement mode.

CAL Icon

Flashes during calibration and illuminates steadily when calibration is ﬁnished.

Temperature Alarm Icon

Flashes when the ambient temperature does not meet the speciﬁed operating

temperature of 5°C to 40°C (41°F to 105°F).

Battery Alarm Icon

Illuminates when the batteries are low and need to be replaced.

Measurement Units

The default setting is µS/cm

Measured Value

Displays the measured conductivity of the sample

4 USING THE ELCOMETER 138 CONDUCTIVITY METER

Ÿ Never apply undue force when opening the meter (to change the batteries or sensor).

Ÿ Do not drop the meter.

Ÿ The sensor is a consumable part. If it becomes damaged or its performance deteriorates, it will

need to be replaced - see Section 8 ‘Spares & Accessories’ on page en-13.

Ÿ Do not measure samples hotter than 40°C (105°F)

Ÿ Do not exert undue force on the sensor.

Ÿ Do not allow utensils (tweezers, pipette, etc) to touch sensor cell.

Ÿ To ensure the meter is waterproof check that the waterproof gasket is clean, not damaged,

seated properly in the groove and is not twisted or warped.

4.2 FITTING AND REPLACING THE BATTERIES

The Elcometer 138 ConductivityMeter uses dry cell batteries only and is supplied with two CR2032

lithium batteries fitted with an isolation strip. Remove the isolation strip before first use.

2 To reassemble the meter, slide the sensor onto the body

of the meter and push the body and sensor together

gently until sensor retaining clip engages.

Ÿ Do not allow contact with solvents.

To fit or replace the batteries:

Ÿ Do not subject the meter to high temperature or humidity.

1 Place batteries in the battery clips ensuring correct

polarity.

Ÿ Although the product is waterproof, avoid immersing it completely. If the meter is accidentally

dropped in water, take it out and remove the moisture.

4.1 CAUTION

Battery

Clip

Battery

en-5 www.elcometer.com

4 USING THE ELCOMETER 138 CONDUCTIVITY METER (continued)

Ensure the meter is turned OFF before attaching / detaching the sensor. If the meter is turned ON with

the sensor detached, the battery alarm may illuminate. In this case, turn the meter OFF and attach the

sensor, and then turn the meter ON again.

2 Slide the sensor across the meter so the clip (A) fits into the hole

on the sensor tongue (a), as shown.

When the battery voltage becomes low, the low battery warning indicator will flash. Replace both

batteries immediately.

4.3 ATTACHING & DETACHING THE SENSOR

1 Ensure that the waterproof gasket is clean and undamaged.

2 The sensor can now be completely removed from the meter.

Detaching the sensor:

When removing the sensor, do not let any water penetrate the inside of the

meter. If some moisture remains on the waterproof gasket, very carefully wipe

the moisture off.

1 Lift the sensor tongue tip and slide the sensor slightly away from the meter.

Note: Lithium batteries must be disposed of carefully to avoid environmental contamination. Please consult your local

Environmental Authority for information on disposal in your region. Do not dispose of any batteries in fire.

Attaching the sensor:

Note: Ensure that the waterproof gasket is lying flat and not twisted.

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en-6

Waterproof

Gasket

4 USING THE ELCOMETER 138 CONDUCTIVITY METER (continued)

Correct procedure for closing meter after removal of the sensor:

Ensure that the sensor tongue is outside the meter case. If the tongue is inserted between the case and

the connector of the meter, it may damage the connector.

1 Put some drops of the conditioning solution into the measurement cell.

3 Clean the measurement cell with running water.

When using the sensor for the first time or again after several weeks of disuse, perform the electrode

surface treatment procedure as follows:

2 Leave for approximately 10 minutes.

4 Wash the measurement cell with standard solution.

5 Perform the calibration procedure, see Section 4.5 on page en-8.

Description Part Number

4.4 ELECTRODE SURFACE TREATMENT PROCEDURE

Replacement Sensor T13830628

The sensor is a consumable part. If it becomes damaged or its performance deteriorates, it will need to

be replaced.

Sensor Tongue Meter

Connector Sensor Meter Sensor Meter

üû

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en-8

4 If continues to flash and the ‘Err’ (error message) is displayed, the calibration has

failed. Check that the standard solution conductivity is correct and perform the calibration

procedure again after thoroughly cleaning the sensor. If the calibration failed whilst using

the correct standard solution, the sensor may be damaged and should be replaced, see

Section 4.3 on page en-7.

5 Clean the sensor with tap water and remove moisture.

When using the sensor for the first time or again after several weeks of disuse, perform the electrode

surface treatment procedure, see Section 4.4 on page en-7:

1 Press the ON/OFF button to switch the meter on.

4 Close the protection cover and press the CAL button for over 2 seconds.

and J ﬂash and the calibration value is displayed. After the calibration

is completed, and J stop ﬂashing and illuminate steadily.

4 Bubbles in the solution may cause the measurement to be inaccurate.

4.5 CALIBRATING THE ELCOMETER 138

3 an appropriate amount Open the protection cover and place of the standard

1413µS/cm solution supplied, see Section 8 ‘Spares & Accessories on page

en-13, into the measurement cell avoiding the inclusion of bubbles. Washing

the sensor with standard solution beforehand may provide more accurate

calibration.

2 Press the CAL button until appears on the display.

6 Press the MEAS button for 0.5 seconds to enter the

measurement mode and prepare for measurement.

CAL

Button

Protection

Cover

CAL

4 USING THE ELCOMETER 138 CONDUCTIVITY METER (continued)

CAL

Cell

Electrode

Appropriate Too Little

en-9 www.elcometer.com

5 TAKING A READING

• Drop: for a small amount of sample - this is the preferred method for these tests.

1 Press the ON/OFF button to switch the meter on.

The following sampling methods are available:

2 Open the protection cover.

• Scooping: for sampling part of a sample.

4 Bubbles in the solution may cause the measurement to be inaccurate.

1 Put a few drops of the sample into the measurement call avoiding the

inclusion of bubbles.

5.1 BEFORE YOU START

2 Close the protection cover.

5.2 SAMPLING METHODS

• Immersion: for a large amount sample.

4 Ambient air may cause the measurement values to fluctuate. To reduce

environmental interference, close the protection cover.

3 Read the value displayed when appears. illuminates when measured value is stabilised.J J

Note: If a measurement result is out of the speciﬁed measurement range, the displayed measured value ﬂashes.

When using the Drop sampling method:

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