Thermo Scientific Orion Star A112, Справочное руководство

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12 Thermo Scientific Orion Star A112 Benchtop and Star A122 Portable Conductivity Meters
Temperature Measurement and Calibration
The Orion Star A112 benchtop conductivity and Star A122 portable conductivity meter show temperature on the
top, secondary display. To read only temperature and see the temperature on the primary, lower display, follow the
instructions below.
Temperature Measurement
1. In the measurement mode, press to display the temperature value on the primary display. (The temperature
value at the top, secondary display will match that of the lower, primary display field.)
2. Rinse with probe with distilled water, blot dry and place into the sample. If the meter is in AUTO-READ mode (meter
default), press . If the meter is in continuous read mode, the meter will immediately start taking readings.
Note: If in AUTO-READ mode and memory storage is enabled, the reading will automatically be stored when
the “AR” appears. If in continuous read mode and memory storage is enabled, press to store into
the meter’s memory.
3. Remove the probe from the sample, rinse with distilled water and blot dry. To continue taking measurements, place
the probe into the next sample and repeat steps 2 and 3.
4. When finished measuring all samples, store probe according to probe instructions.
Temperature Calibration
The meter temperature display has a relative accuracy of ± 0.1 °C. Temperature probes may have varying temperature
accuracies, usually ± 0.5 °C to ± 2 °C. Use this function only if it is necessary to calibrate the temperature readings. Since
the temperature offset calculated during the calibration is applied to all future temperature measurements, recalibrate if
a different probe is used.
1. In the measurement mode, press to display the temperature reading.
2. Rinse the probe and NIST-traceable thermometers with distilled water, blot dry and place into a solution with a
known, stable temperature.
Note:
It is recommended that two NIST-traceable thermometers be used to measure and verify the temperature of the
solution.
Press .
3. Wait for the readings to stabilize (about 5 to 10 minutes) and “READY” to stop flashing. The meter will display
the original temperature read by the probe. Press or keys to enter the temperature value read by the
thermometer.
Note:
The calculated offset will be applied to all future temperature readings. To abort, press to end without
saving and return to the measurement mode.
4. When finished, press to save and end calibration.