Measurement & Units Overview - Oxygen Units - Ametek OXYvisor Installation, Operation & Maintenance Manual

Measurement
& Units
Correction for Dissolved Salts - For high accuracy at medium to higher ranges of dissolved oxygen in
solutions with high salt concentrations, enter the Salinity Concentration in ppt (o/oo).
Non-Aqueous Liquid (No Water) - D.O. Measurement:
The OXYvisor can provide a relative and repeatable concentration measurement for non-aqueous liquids.
The sensor is capable to measure the partial pressure of several non-aqueous solutions such as Ethanol,
Methanol, hydrocarbons and others. Please consult factory.
The average and normal salinity of seawater is 35 g dissolved salt / kg sea water which is
commonly written as 35 parts per thousand or 35 o/oo or 3.5%.
USEFUL INFORMATION
5.11.4 - Measurement & Units Overview - Oxygen Units
Oxygen Units
User can select the preferred measurement units for the oxygen measurement. The available units are
dependent on the Sensor Type and Media selection.
5.11.5 - Measurement & Units Overview - Compensation Units
Compensation Units
User can select the preferred measurement units for the secondary PV's, temperature and pressure.
Temperature Units - Available as either °C or °F
Pressure Units (Absolute) - Available as either mBar, inches H2O, Bar, Torr, PSI
5.11.6 - Measurement & Units Overview - Oxygen Sample Rate
Oxygen Sample Rate
User can select the required Sample Rate base on the application requirements. Slower sample rates
(longer intervals between measurement) will give less drift on longer sensor life. See Appendix 3 for general
estimations of drift vs Sample Rate.
Manual Adjust - Enter the sample rate in seconds. Default is 30 seconds. (Range = 2 to 3600s)
Auto Adjust - Allows for a Normal Sample Rate (set to a slow rate) to extend sensor life and reduce drift,
however, upon detecting a step-change, (magnitude determined by the end-user) will automatically adjust
to a Max Sample Rate (fast sample rate) to better measure the event. Once stability is observed again for the
duration of the Normal Sample Rate, the measurement will return to the Normal Sample Rate.
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Installation, Operation and Maintenance Manual
Sensor Type Media (Phase)
Gas Phase
BOS3
Aqueous/Liquid Phase
Gas Phase
BOS1
Aqueous/Liquid Phase
Gas Phase
BOS2
Aqueous/Liquid Phase
Table 9 - Oxygen Measurement Units by Sensor Type
OXYvisor Optical Oxygen Analyzer
Units Available
ppm O
2
Not Available
ppm O , % Oxygen and hPa
2
ppm Dissolved Oxygen, ppb Dissolved Oxygen
% Oxygen
ppm Dissolved Oxygen, ppb Dissolved Oxygen