Measurement & Units Overview; Measurement & Units Overview - Oxygen Sensor Type; Measurement & Units Overview - Media - Ametek OXYvisor Installation, Operation & Maintenance Manual

Installation, Operation & Maintenance Manual
OXYvisor Optical Oxygen Analyzer
5.11.1 - Measurement & Units Overview
The Measurement & Units sub-menu is used during primary setup of the analyzer. It allows selection of the BOS
sensor type (BOS1, BOS2, BOS3 or custom), process media (gas or liquid), oxygen units, compensating units
(temp and pressure), sample rate, and signal intensity needed for accurate measurement within a specific
application.
5.11.2 - Measurement & Units Overview - Oxygen Sensor Type
Select Oxygen Sensor Type: BOS1, BOS2 or BOS3 sensor ranges. The sensor tag will show the sensor type
within the model number.
Sensor Type
BOS2
BOS1
BOS3
!
User Defined Constants are for special applications and should only be used with factory
recommendation.
Changing Sensor types may change other settings to their defaults if they conflict with
current settings. For example, changing to a BOS3 low range gas sensor from a BOS1 set
to measure dissolved oxygen in aqueous phase will change the units, the media type and
4-20 output to default BOS3 values.
USEFUL INFORMATION
5.11.3 - Measurement & Units Overview - Media
The Media selection defines the phase in which the oxygen measurement is made. Gas Phase (ppmv),
Aqueous liquid (dissolved oxygen) and Non-Aqueous liquid (dissolved oxygen) selections are available.
Gas Phase Oxygen Measurement:
Select this when measuring % to trace (ppm) level oxygen in gas samples or gas processes.
Humidity Present (>50%) - Default is NO. Only select YES, if special calculation for dry basis measurement
is required. The analyzer will calculate the dry O
on 100% H 0 saturation and the measured temperature. For most cases, it is useful to know the actual O
2
concentration under the wet process conditions.
Std Pressure Compensation - This selection calculates the oxygen concentration (% mole or % volume)
from the measured oxygen partial pressure utilizing the ideal gas law. This is the proper selection for most all
OXYvisor applications, with the exception of in-situ, in-line installations, in high pressure applications that are
more than 300+ psig, 20 Bar. See Appendix A.1-1
AGI Compressibility - For measurement in high pressure systems (>300 psig, 20 Bar) a more advanced
calculation to account for molecular interactions, non-ideal behavior is available. The calculation uses AGI
compressibility data, based on stream composition provided by end user. The AGI compressibility data can
only be inputed via a PC from the OXYvisor's OxygenAnalyzer Software. See Appendix A.1-2.
Aqueous Liquid (Contains Water) - D.O. Measurement:
Select this for measuring ppm (mg/L) or ppb (µg/L) dissolved oxygen in aqueous solutions. This selection will
convert the partial pressure of oxygen measurement to concentration based on the Bunsen Correlation and the
option for a dissolved salt correction. See Appendix A.2.
Description GAS PHASE % O2
High Range 0 to 25%
Mid Range 0 to 5%
Low or Trace Range 0 to 0.0300 % (300 ppm O
basis by accounting for the expected water vapor based
2
Liquid Phase
0 to 45 mg/L (ppm)
0 to 2 ppm
) Not used in Liquids
2
Measurement
& Units
2
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