Chapter 3
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Meter Setup Menus
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 A323 RDO/DO meters, Orion Star A326 pH/RDO/DO meters and Orion Star A329
pH/ISE/conductivity/RDO/DO meters. Default meter settings are bold.
Parameter
Settings
Details
Measure Mode
•
DO – Polarographic
•
RDO
•
Auto
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
Measure Unit
•
mg/L
•
% sat
Set the units displayed with the dissolved oxygen
measurement value
Resolution
(% saturation)
1 Decimal Place
2 Decimal Places
1
0.1
Set the resolution of the dissolved oxygen
measurement value as percent saturation
Resolution
(mg/L)
1 Decimal Place
2 Decimal Places
0.1
0.01
Set the resolution of the dissolved oxygen
measurement value as mg/L
Read Type
•
Auto
•
Continuous
•
Timed 00:00:03
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
Baro Press
•
Auto
•
Manual 760.0mmHg
Set the automatic barometric pressure compensation
source as the internal barometer (Auto) or a manually
entered barometric pressure value (Manual)
Salinity Correct
•
Auto (Practical Salt)*
•
Manual 0.0
Enter the salinity value of samples for automatic
salinity correction of dissolved oxygen measurements
Stability
•
Smart Stability
•
Fast
•
Medium
•
Slow
Set when a measurement is recognized as stable,
Smart Stability compensates for measurement
conditions and optimizes the meter response time
Averaging
•
Off
•
Automatic Smart
Set averaging for faster measurement stability,
Automatic Smart compensates for measurement
conditions and optimizes the meter response time
Limit Alarm
•
Limit Alarm
Off On
•
Alarm Settings
High High/Low Low
•
High Limit
•
Low Limit
Set the limit alarm off or on, when the limit alarm is
on – select the alarm settings as high, high/low or low
and then enter the measurement limit values
The limit alarm is triggered when a measurement
goes above the entered high limit or below the
entered low limit
Cal Due Alarm
•
Cal Due Alarm
On Off
•
Cal Due Limit
12 Hrs
Set the calibration due alarm off or on, when the cal
due alarm is on – enter the calibration time interval in
hours (1 to 9998 hours)
The cal due alarm is triggered after the entered time
has elapsed without a calibration being performed
RDO Cap Life
(RDO only)
RDO Cap Life
Serial Number
0.0
0
View the remaining RDO optical DO sensor cap life in
days and the serial number
* Orion Star A329 meters offer the option to use the measured conductivity value of a sample
for automatic salinity correction of dissolved oxygen measurements.
44
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Orion Star A320 Series Portable Meter User Manual
Thermo Scientific
Summary of Contents for Orion Star A320 Series
Page 5: ......
