Hanna Instruments Edge User Manual

Operational Guide
62
Salinity Measurements (Not Available In Basic Mode)
Press the RANGE key twice to switch from conductivity to the congured
Salinity scale.
Verify the desired scale is congured in SETUP. The meter supports three
salinity scales: Practical Scale 1978, Percent Scale %, and Natural Sea Water
1966, [g/L]. (Information on the 3 scales follows)
Note: These are for determining salinity as they relate to general
oceanographic use. Practical salinity and the Natural Seawater require a
conductivity calibration. % NaCl requires a calibration in HI 70371 standard.
PSU - Practical Salinity Scale
The practical salinity (S) of seawater relates the ratio of electrical conductivity
of a normal seawater sample at 15 ºC and 1 atmosphere to a potassium chloride
solution (KCl) with a mass of 32.4356 g/Kg water at the same temperature
and pressure.
Under these conditions the ratio is equal to 1, and S=35. The practical salinity
scale may be applied to values through 42 PSU at temperature between -2 to
35 ºC.
According to the denition, salinity of a sample in PSU (practical salinity units)
is calculated using the following formula:
Salinity
Measurements

Hanna Instruments Edge Specifications

General

Brand	Hanna Instruments
Model	Edge
Category	Multimeter
Language	English