Measurement Procedure - Thermo Scientific Orion Star A220 Series User Manual

Thermo Scientific

Measurement Procedure

Prepare the sensors according to the instructions in the sensors manuals. Connect all
electrodes, sensors and probes to be used to the appropriate meter inputs. Make sure the
sensors are recently calibrated and working correctly.
Ensure the meter measurement mode is set to the desired measurement parameter.
1. Rinse the sensors with distilled water or appropriate solution, blot gently with a lint-free
tissue to remove excess water and place into the sample.
2. Start the measurement and wait for the reading to stabilize or reach the predefined time.
a. Auto-Read: Press the measure (esc) key to start the measurement.
b. Continuous: Measurements will start immediately when in the measurement mode.
3. Once the measurement is stable or reaches the set time, record all applicable parameters.
a. Auto-Read: Once the measurement is stable, it will be locked and held on the display
and the AR icon will remain solid. If the data log function is enabled, the measurement
will be exported to the data log.
b. Continuous: The flashing Stabilizing icon will update to the solid Ready icon when the
measurement is stable. If the data log function is enabled, press the log/print key to
export the measurement to the data log.
4. Remove the sensors from the sample, rinse with distilled water or appropriate solution, blot
gently with a lint-free tissue to remove excess water and place into the next sample.
5. Repeat steps 2 through 4 for all samples. When all samples have been measured, store
the sensors according to the instructions in the sensor manuals.
Chapter 5 Using the Conductivity Channel
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Orion Star A220 Series Portable Meter User Manual 47
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