Appendix 1 Advanced Meter Features; Dissolved Oxygen Barometric Pressure Compensation; Dissolved Oxygen Salinity Correction - Thermo Scientific Orion Star A213 Reference Manual

Appendix 1 Advanced Meter Features

Dissolved Oxygen Barometric Pressure Compensation

compensated dissolved oxygen readings. The meter can also use manual barometric pressure compensation if
dissolved oxygen is measured with a submerged probe or in a pressurized vessel. The pressure must be entered
1 mm Hg = 0.03937 inch Hg = 1.3332 hPa (mBar) = 0.01934 PSI.

Dissolved Oxygen Salinity Correction

the conductivity value read by the conductivity cell to calculate the salinity correction factor and applies the factor to
Conductivity
at 20 °C
(mS/cm)
8
11
12
13
18
Thermo Scientific Orion Star A213 Benchtop and Star A223 and Star A323 Portable RDO/DO Meter Reference Guide
Salinity Conductivity
Correction at 20 °C
Value (ppt) (mS/cm)
3
21
22
23
8
8 28
31
11 32
12 33
13
Salinity Conductivity
Correction at 20 °C
Value (ppt) (mS/cm)
13
38
18
18
21
22
22
23
Salinity
Correction
Value (ppt)
28
32
33
38
45