Elcometer 138 User Manual page 10

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5 TAKING A READING
The Elcometer 138 Bresle Salt Meter has been designed primarily for use in accordance with ISO 8502-6
/ ISO8502-9. It measures the conductivity of the sample but displays the surface density of salts. The
measured conductivity is converted to surface density of salts using the ISO Salt Mix or IMO PSPC
equivalent NaCI conversion factors below, dependent on the measurement mode selected, based on an
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area of 12.5cm and a sample volume of 3ml.
For detailed information on taking measurements in accordance with ISO 8502-6 /ISO8502-9, please
refer to the user guides for the Elcometer 138 Bresle Salt Kits.
Reading
µS/cm
5.1 TAKING A READING
1 Press the ON/OFF button to switch the meter on.
2 Open the protection cover.
3 Put 3ml of the sample into the measurement cell avoiding the inclusion of
bubbles.
4 Bubbles in the solution may cause the measurement to be inaccurate.
4 Close the protection cover.
Ambient air may cause the measurement values to fluctuate. To reduce
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environmental interference, close the protection cover.
5 Read the value displayed when
Note: If a measurement result is out of the specified measurement range, the displayed measured value flashes.
en-9
Surface Density of Salts: Factors
ISO Salt Mix
2
mg/m
µg/cm
x1.2 x0.12
J
appears.
IMO PSPC equivalent NaCI
2
mg/m
x1.1
J
illuminates when measured value is stabilised.
2
µg/cm
x0.11
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