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9 TECHNICAL SPECIFICATION

Chemical

Measuring range:

0.1 µg.cm

-2

to 20 µg.cm

-2

soluble salt (as

sodium chloride) when using recommended
High Purity Sample Papers and water with a
conductivity of <0.25 microsiemens

Resolution:

0.1 µg.cm

-2

(with sodium chloride)

Measuring accuracy:

±10% of reading

Temperature correction:

Calibrated at 25°C
Below 25°C: -1.7% /°C
Above 25°C: +1.7% /°C

Electrical

Electrodes:

Copper

Display:

20 digit LCD

Sampling timer:

2 minutes

Battery:

9 V Alkaline PP3 (6LR61)

Timeout:

20 seconds

Working limits

Temperature range:

5°C to 40°C

Maximum relative humidity:

80%

Physical

Dimensions:

200 mm x 190 mm x 60 mm

Weight:

1.5 kg

Case:

Damage resistant polyurethane

Sealing:

Splash proof

Sampling capability

Substrate:

Metallic or non-metallic

Area required:

110 mm diameter

Position:

Any horizontal, vertical, curved or inclined
surface where sample paper can be placed

Содержание SCM400

Страница 1: ...English Elcometer 130 SCM400 Salt Contamination Meter Operating Instructions ...

Страница 2: ...mited All other trademarks acknowledged Copyright Elcometer Limited 2009 All rights reserved No part of this Document may be reproduced transmitted transcribed stored in a retrieval system or otherwise or translated 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 Doc No TMA 0125 Issue...

Страница 3: ...ler sample papers 8 4 4 Interpreting the readings 10 5 Care and maintenance 13 5 1 Checking calibration 13 5 2 Checking water quality 13 5 3 Checking purity of sample papers 14 5 4 Removing and cleaning or replacing the electrodes 14 5 5 Removing discolouration from electrode surfaces 14 5 6 Replacing the pressure plate support pads 15 5 7 Replacing the battery 15 5 8 Storage 15 6 Fault diagnosis ...

Страница 4: ...website at www elcometer com 1 ABOUT YOUR METER The Elcometer 130 SCM400 Salt Contamination Meter measures salt contamination levels on metallic and non metallic surfaces and is particularly useful on areas such as bends and welds 1 1 Standards The instrument can be used in accordance with the following International Standard SSPC Guide 15 1 2 What the box contains Elcometer 130 SCM400 Salt Contam...

Страница 5: ...ause of their consistent absorbency characteristics and therefore the concentration of the solution formed is related to the quantity of soluble salts removed The sample paper containing the salt solution is placed over the electrodes on the Elcometer 130 SCM400 and its resistivity is determined This is achieved by measuring the minimum resistance of the solution over a fixed solution path length ...

Страница 6: ...salt level needs to be specified In the case of painting this level is a matter for discussion between the Client the Applicator and the Paint Manufacturer and it will depend on the working conditions the paint system used the required service life and what can be economically achieved Consequently it is not possible to specify in these Operating Instructions which salt standards are best suited t...

Страница 7: ...er 130 SCM400 High Purity Sample Paper follow procedure 4 2 If the sample area is smaller than the Elcometer 130 SCM400 High Purity Sample Paper follow procedure 4 3 4 2 Taking samples using standard sample papers 1 Put on a pair of clean disposable gloves 2 Fill a 2 ml syringe with precisely 1 6 ml of high purity water 3 Using tweezers remove an Elcometer 130 SCM400 High Purity Sample Papera from...

Страница 8: ...If hand pressure is required to exclude air the gloved hand should not be used Instead turn one of the plastic bags provided inside out place it over the gloved hand and press the surface discarding the plastic bag when finished 7 Switch the Elcometer 130 SCM400 on by pressing the red pushbutton onceb The display will show 8 When the sample paper is in position press the red pushbutton again to st...

Страница 9: ...uded from beneath the paper Figure 3 Placing Elcometer 130 SCM400 High Purity Sample Paper onto the Electrode for Measurement 12 Close the lid ensuring that the magnetic catch is fully engaged 13 Within 5 seconds press the green pushbutton and a reading will be displayed or c The Elcometer 130 SCM400 cannot be switched off when the timer is operating or when measurements are being made SAMPLE READ...

Страница 10: ...n Elcometer 130 SCM400 High Purity Sample Paper from the pack 3 Fold paper as follows For half size paper fold standard paper in half and cut into two along fold line For quarter size paper fold standard paper into quarters and cut into quadrants along fold lines For 22 mm wide strip fold standard paper into half and cut 11 mm either side of fold line 4 Fill a 2 ml syringe with an appropriate amou...

Страница 11: ...ithin 5 seconds press the green pushbutton once to obtain a reading 10 Multiply the reading by an appropriate factor to account for the reduced area sampled For half size paper multiply the reading by 2 For quarter size paper multiply the reading by 4 For 22 mm wide strips multiply the reading by 2 8 11 Follow Steps 5 to 10 inclusive in Section 4 2 Outer Electrode Central Marker Inner Electrode Ha...

Страница 12: ...ide test measurements have been made on the instrument with salt mixtures which are known to be present on atmospherically contaminated surfaces The results are compared with sodium chloride Figure 4 in terms of Actual Salt Level vs Salt Level Indicated on the Elcometer 130 SCM400 This shows that the difference between readings for these salts and for sodium chloride are acceptably small particula...

Страница 13: ...his variation will not be significant However the temperature can be corrected by using the graphs given in Figure 5 and as detailed in Technical specification on page 19 The proportion of the soluble salt present on the surface being tested which is removed by the sample paper will also affect readings This factor is common to all surface sampling methods Tests have shown that removal rates are a...

Страница 14: ...ssium Ferricyanide test BS 5493 Appendix G would aid interpretation on carbon steel and low alloy steel surfaces This test will only work on ferritic steel surfaces Figure 5 Readings obtained at Various Temperatures with Sodium Chloride 0 2 4 10 8 6 16 14 12 18 20 2 10 8 6 4 14 12 18 16 20 SALT LEVEL READING µg cm 2 ACTUAL SALT LEVEL µg cm 2 35 C 15 C 25 C ...

Страница 15: ...ke samples as detailed in Taking samples using standard sample papers on page 5 but using precisely 1 5 ml of a solution of 31 6 mg 0 1 analar sodium chloride dissolved in 100 ml of high purity water The reading should be in the range 5 µg cm 2 10 at 25 C For temperatures below 25 C apply a correction factor of 1 7 C For temperatures above 25 C apply a correction factor of 1 7 C Note When finished...

Страница 16: ...gure 6 2 To clean the electrode Wipe the electrode gasket pressure plate and the electrode well with clean tissues ensuring all are properly dry 3 When refitting or replacing the electrode ensure that the four retaining screws are below the surface of the electrode 5 5 Removing discolouration from electrode surfaces During use the electrode will become slightly discoloured due to surface oxidation...

Страница 17: ... carefully position the pressure plate in the centre of the lid recess 7 Apply firm pressure to the plate to achieve adhesion 8 Thoroughly clean the electrode and pressure plate surfaces see Removing and cleaning or replacing the electrodes on page 14 5 7 Replacing the battery It is essential that alkaline batteriesd are used in the Elcometer 130 SCM400 The battery compartment is under the name pl...

Страница 18: ...16 English Figure 6 Replacement parts ...

Страница 19: ...evel readings are indicated when no sampling paper is on the electrode Water may be underneath the electrode Remove and dry electrode See Section 5 4 Pressure plate becomes detached Support pads have lost their adhesion Replace support pads See Section 5 6 Salt level readings are higher than expected Contaminated pressure plate or electrode Clean the surface of the electrode and pressure plate See...

Страница 20: ...tion to the Elcometer 130 SCM400 Salt Contamination Meter Elcometer produces a wide range of other equipment for testing and measuring the characteristics of coatings Users of the Elcometer 130 may also benefit from the following Elcometer products Elcometer 134A Chloride Ion Test Kit for Abrasives Elcometer 134S Salt Detection Kit for Blast Cleaned Surfaces Elcometer 134W Chloride Ion Test Kit fo...

Страница 21: ...at 25 C Below 25 C 1 7 C Above 25 C 1 7 C Electrical Electrodes Copper Display 20 digit LCD Sampling timer 2 minutes Battery 9 V Alkaline PP3 6LR61 Timeout 20 seconds Working limits Temperature range 5 C to 40 C Maximum relative humidity 80 Physical Dimensions 200 mm x 190 mm x 60 mm Weight 1 5 kg Case Damage resistant polyurethane Sealing Splash proof Sampling capability Substrate Metallic or non...

Страница 22: ...20 English ...

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