Temperature Measurement And Calibration; Temperature Measurement; Temperature Calibration - Thermo Scientific Orion Star A111 Reference Manual

Temperature Measurement and Calibration

Temperature Measurement

The meter ATC temperature display is automatically shown for at the top, secondary display on the meter. To read only
temperature and see the temperature on the primary, lower display, follow the instructions below.
1. In the measurement mode, press
value at the top of the meter will match that of the lower, larger display field.)
2. Rinse the ATC probe with distilled water, blot dry and place into the sample. If the meter is is AUTO-READ mode
(meter default), press
readings.
3. Record the temperature of the sample when "READY" stops .
Note: If in AUTO-READ mode and memory storage is enabled, the reading will automatically be stored when
the "AR" icon appears. If in continuous read mode and memory storage is enabled, press
the meter's memory.
4. Remove the ATC probe from the sample, rinse with distilled water, blot dry. To continue taking measurements repeat
steps 2 through 4.
5. When finished measuring all samples, store electrode according to electrode instructions.

Temperature Calibration

The meter ATC temperature display has a relative accuracy of ± 0.1 °C. ATC probes 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 ATC probe is used.
1. In the
2. When the ATC probe is ready, press
blot dry and place into a solution with a known, stable temperature. It is recommended that two NIST-traceable
thermometers be used to measure and verify the temperature of the solution.
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 ATC probe. Press
thermometer.
Note: The calculated offset will be applied to all future temperature readings. To abort, press
saving and return to the measurement mode.
4. When finished, press
Thermo Scientific Orion Star A111 Benchtop and Star A121 Portable pH Meters
to display the temperature value on the primary display. (The temperature
. If the meter is in continuous read mode, the meter will immediately start taking
, press to display the temperature reading.
to save and end calibration.
Rinse the ATC probe and NIST-traceable thermometers with distilled water,
or keys to enter the temperature value read by the
to store the reading into
to end without
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