3 MEASURING SOLUBLE SALTS
1. Press and hold the ON/OFF button to switch the gauge on.
2. Select Menu/Setup/Measurement Mode/Surface Cleanliness.
3. Press Menu/Setup/Units to set the measurement units.
4Only the measurement units applicable to surface cleanliness will be
available for selection, see page 7. If set to an alternative measurement unit
prior to selecting the measurement mode “Surface Cleanliness”, the gauge
2
will automatically default to μg/cm .
3. Set the filter paper size as required, see page 7.
4. Put on a pair of clean disposable gloves.
#
5. Fill a syringe with the precise amount of high purity water required,
dependent on the filter paper size: Full: 1.6ml; Half: 0.8ml; Quarter: 0.4ml.
4Non-pure water, with a maximum conductivity of 237.5µS/cm (equivalent to
2
2µg/cm or 119 ppm) can be offset using the Calibration Offset feature (T),
see page 7.
6. Using tweezers, remove a filter paper from the pack.
4For half size paper: fold the standard paper in half and cut into two along the
fold line.
4For quarter size paper: fold the standard paper into quarters and cut into
quadrants along the fold lines.
7. Eject the pure water from the syringe evenly onto the filter paper, taking
care to retain all the water on the paper.
8. Place wetted paper on to the area under test,
pressing firmly into any contours or
irregularities to remove any entrapped air
and start the 2 minute timer.
4The Elcometer 130 has an optional timer,
see page 15.
4When testing on hot substrates, a clean
plastic bag can be placed over the paper to
reduce evaporation.
4Additional samples can be prepared whilst
waiting for the 2 minute test time to elapse.
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1: 1.6ml
½: 0.8ml
¼: 0.4ml
R
en
www.elcometer.com 8
2 mins
Sample 1
Sample 2...
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