VII-7
Orion Star Series Meter
Thermo Electron Corporation
Conductivity
Conductivity Calibration for 1-5 Points
1. Select a conductivity probe with an appropriate cell constant for the expected
samples to be measured. A flow cell is recommended for greater low level
measurement accuracy.
2. Prepare the conductivity probe for use according to the probe instructions.
3. Verify the correct reference temperature to be used for the measurement has
been selected in the conductivity setup menu.
4. All conductivity calibrations are performed in mS/cm or μS/cm. The other
measurement modes of conductivity are calculated using the cell constant
determined from the calibration and any other necessary parameters selected in
the setup menu.
5. Place the probe into the least concentrated standard for the first calibration
point. When the mS/cm or μS/cm icon stops flashing in the measurement mode
with the arrow pointed at the conductivity line press the Calibrate key.
6. The screen will display the cell constant on the Top line and the conductivity
on the middle line. To perform a manual calibration use the UP & DOWN arrow
keys to change the value of the flashing digit on the cell constant. Press the
DECIMAL/DIGIT key to change the digit to be scrolled. Edit the cell constant
until the conductivity measurement matches the conductivity of the standard at
the actual measurement temperature.
a. Note: If you do not start the scrolling within 5 seconds the screen will
automatically proceed to the AUTOCal/DirectCal screen.
b. In the AutoCal/DirectCal screen when the electrode is stable the mS/cm or μS/
cm icon will stop flashing and the temperature corrected value for the standard
is displayed. Press CALIBRATE to accept the AutoCal value and proceed to
the next calibration point or if performing a DirectCal calibration use the UP &
DOWN arrow and DECIMAL/DIGIT keys to change the conductivity value to the
actual conductivity of the standard at the measurement temperature then press
CALIBRATE key.
Содержание 3-Star Conductivity
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