Measuring with EC Probes 130
Sal ppt
Measurements expressed in ppt are based on the Natural Seawater Scale that extends from 0.00 to 80.00 g/L
and covers 10 to 31 °C temperature range. It determines the salinity based upon a conductivity ratio of sample
to standard seawater at 15 °C and an approximate salinity value of 35 in seawater.
Sal %
In this scale 100 % salinity is equivalent to roughly 10 % solids.
• With item selected, press Modify for the drop‑down options list.
• Use the
ud keys to scroll between options
• Press Select to save.
Temperature Compensation (Temp.Comp.)
Option: Linear, Natural, Standard, None
Note: When Meas.Mode is set to Sal %, Sal psu, or Sal ppt, Linear is the only available option.
An integral temperature sensor measures the process temperature and adjusts the measured conductivity to
a reference temperature by applying specialized compensation standards:
• Linear: appropriate when it is assumed that the temperature coefficient of variation has the same value
for all measurement temperatures
•
Standard: appropriate for high‑purity water measurements and documented in ASTM Standard D5391‑14.
This setting should be used for resistivity measurements.
•
Natural: appropriate for natural ground, well, or surface water (or water with similar composition) in
accordance with ISO7888 standard.
The result is reliable electrolytic conductivity (EC), TDS (Total Dissolved Solids), resistivity, or Seawater Salinity
in percent, psu, or ppt units.
• With item selected, press Modify for the drop‑down options list.
• Press the
ud keys to scroll between options.
• Press Select to save.
Temperature Source (Temp. Source)
Option: Probe, Manual
• With item selected, press Modify for the drop‑down options list.
• Use the
ud keys to scroll between options.
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