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Table of Contents
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Summary of Contents for Elcometer SCM400
- Page 1 Elcometer 130 SCM400 Salt Contamination Meter Operating Instructions...
- Page 2 The Elcometer 130 SCM400 Salt Contamination Meter has been tested in acccordance with EU regulations governing Electro-magnetic compliance and it meets the required directives. is a registered trademark of Elcometer Limited. All other trademarks acknowledged. © Copyright Elcometer Limited. 2009.
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Page 3: Table Of Contents
CONTENTS Section Page About your meter ......... . 2 1.1 Standards. -
Page 4: About Your Meter
Elcometer 130 SCM400 Salt Contamination Meter. Welcome to Elcometer. Elcometer are world leaders in the design, manufacture and supply of inspection equipment for coatings and concrete. Our products cover all aspects of coating inspection, from development through application to post application inspection. -
Page 5: Principle Of Operation
2 PRINCIPLE OF OPERATION Soluble salts on the surface are taken into solution by placing a wetted 110 mm diameter Elcometer 130 SCM400 High Purity Sample Paper on the area to be sampled. By leaving the paper in contact for a timed period, salt removal from the surface is maximised. -
Page 6: Specification Of Salt Levels
Consequently, it is not possible to specify in these Operating Instructions which salt standards are best suited to all industries. However, during the development of the Elcometer 130 SCM400, the effect of salt contamination on the life of coatings under a range of realistic and accelerated environmental... -
Page 7: Taking A Reading
Water for Laboratory Use, Grade 3? See “Spares and accessories” on page 18 for replacement water If the sample area is larger than the Elcometer 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. - Page 8 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 once . The display will show: SCM..Ready...
- Page 9 SALT LEVEL 9 µg.cm or:- SALT LEVELS TOO LOW > 20 µg.cm If Salt Level <0.1 µg.cm If Salt Level >20 µg.cm c. The Elcometer 130 SCM400 cannot be switched off when the timer is operating or when measurements are being made.
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Page 10: Taking Samples Using Smaller Sample Papers
Care must be taken to ensure that sample papers do not become contaminated. 1. Put on a pair of clean disposable gloves. 2. Using tweezers, remove an 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. - Page 11 If using half size papers - cover Half Size Sample Paper exactly half the inner and outer electrodes. Outer Electrode Inner Electrode Central Marker If using quarter size papers - Quarter Size Sample Paper cover exactly quarter of the inner and outer electrodes.
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Page 12: Interpreting The Readings
In most practical situations where measurements of surface salt contamination are required, it is unlikely that the precise ionic make-up of the contamination will be known. The Elcometer 130 SCM400 is calibrated against known concentrations of the most common constituent of atmospheric contamination, namely sodium chloride. - Page 13 Figure 4. Readings obtained with Different Salts (All Measurements taken at 25° C) Temperature could affect readings taken. The Elcometer 130 SCM400 has been calibrated with sodium chloride at 25° C. Figur e 5 illustrates the small variation that might be expected in the range 15° C to 35°C. In most cases it is likely that this variation will not be significant.
- Page 14 If surfaces are heavily pitted (i.e. >1000 µm) it is possible that soluble salts will be retained within the pits. If so, following the qualitative Potassium 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.
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Page 15: Care And Maintenance
On the outside cover of these operating instructions. • At www.elcometer.com Please note that the back plate of the Elcometer 130 SCM400 should not be removed by the User - doing so could affect the calibration. 5.1 Checking calibration The Elcometer 130 SCM400 has been factory calibrated and cannot be calibrated by the User. -
Page 16: Checking Purity Of Sample Papers
This could slightly affect the accuracy of the Elcometer 130 SCM400 and should be removed by gentle rubbing with a very fine abrasive paper (1200 grit). -
Page 17: Replacing The Pressure Plate Support Pads
“Removing and cleaning or replacing the electrodes” on page 14. 5.7 Replacing the battery It is essential that alkaline batteries are used in the Elcometer 130 SCM400. The battery compartment is under the name plate on the underside of the instrument. - Page 18 Figure 6. Replacement parts...
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Page 19: Fault Diagnosis
There are no User serviceable parts inside this instrument and the back plate should not be removed. If faults of this nature are suspected, please contact Elcometer or your local Elcometer supplier. Faults that may occur which can be corrected by the User are detailed in the Table below. -
Page 20: Spares And Accessories
Pressure Plate Support Pads: T1304475- (pack of 8) 8 RELATED EQUIPMENT In addition 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: •... -
Page 21: Technical Specification
9 TECHNICAL SPECIFICATION Chemical Measuring range: 0.1 µg.cm to 20 µg.cm 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 (with sodium chloride) Measuring accuracy: ±10% of reading Temperature correction: Calibrated at 25°... - Page 22 English...