Chapter 2
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Meter Basics
Meter Models and Measurement Capabilities
The table below shows the available models of Orion Star A220 series portable meters and
their available measurement modes. All measurements include temperature.
Meter Model
Channel 1 Measurement Modes
Temperature Modes
Star A221 pH Meter
pH
mV
RmV
ORP
Automatic
Manual
Star A222 Conductivity Meter
Conductivity
TDS
Salinity
Resistivity
Automatic
Manual
Star A223 RDO/DO Meter
Dissolved Oxygen as % Saturation
or mg/L
Automatic
Meter Maintenance
•
For routine meter maintenance, dust and wipe with a damp cloth. If necessary, warm water
or mild water-based detergent can be used.
•
Meter maintenance can be performed on a daily, weekly or monthly basis, as required by
the operating environment.
•
Remove any spilled substances immediately from the meter or module using the proper
cleaning procedure for that spill type.
Thermo Scientific
Orion Star A220 Series Portable Meter User Manual
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17
Summary of Contents for Orion Star A220 Series
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