Thermo Scientific Orion Star A220 Series User Manual page 27

Thermo Scientific
Mode and Settings Menu for DO/RDO Channel
Use the Mode and Settings menu to customize settings for the dissolved oxygen channel of
Orion Star A223 RDO/DO meters. Default meter settings are bold.
Parameter Settings
· DO – Polarographic
Measure Mode · RDO
· Auto
· mg/L
Measure Unit
· % sat
Resolution
1 Decimal Place
2 Decimal Places
(% saturation)
Resolution
1 Decimal Place
2 Decimal Places
(mg/L)
· Auto
Read Type
· Continuous
· Auto
Baro Press
· Manual
Salinity Correct
· Manual
Cal Due Alarm
· Cal Due Alarm
RDO Cap Life
RDO Cap Life
Serial Number
(RDO only)
Barometric Pressure Compensation Setting
Orion Star A223 RDO/DO meters have an internal barometer that can be used for automatic
pressure compensated dissolved oxygen readings. Manual entry of the barometric pressure
can be used for automatic pressure compensated dissolved oxygen readings, which is useful
when dissolved oxygen is measured with a submerged sensor or in a pressurized vessel. The
pressure value must be entered as mm Hg.
1 mm Hg = 0.03937 inch Hg = 1.3332 hPa (mBar) = 0.01934 PSI
Details
Set the type of dissolved oxygen sensor connected to
the meter as DO polarographic or RDO optical or
select Auto and the meter will automatically detect
which type of dissolved oxygen sensor is connected
and update the displayed measurement mode
Set the units displayed with the dissolved oxygen
measurement value
1 Set the resolution of the dissolved oxygen
0.1 measurement value as percent saturation
0.1 Set the resolution of the dissolved oxygen
0.01 measurement value as mg/L
Set the read type to determine how the meter takes a
measurement and when the measurement is sent to
the data log and/or external device
Set the automatic barometric pressure compensation
source as the internal barometer (Auto) or a manually
760.0mmHg
entered barometric pressure value (Manual)
Enter the salinity value of samples for automatic
0.0
salinity correction of dissolved oxygen measurements
Set the calibration due alarm off or on, when the
alarm is on, the fixed calibration time interval is 12
On
hours and the alarm is triggered after 12 hours has
elapsed without a calibration being performed
0.0 View the remaining RDO optical DO sensor cap life in
0
days and the serial number
Orion Star A220 Series Portable Meter User Manual
Chapter 3 Meter Setup Menus
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