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CONDUCTIVITY CALIBRATION
For optimum measurements:
• Insert probe in the center of the beaker away from container bottom or walls.
• Fix the probe so it does not move during measurements and add sufficient solution to cover top vent holes
on probe.
• Gently stir solution and wait for probe to reach thermal equilibrium and verify no bubbles are entrapped
within probe electrodes.
It is recommended to calibrate the instrument frequently, especially if high accuracy is required.
The conductivity range should be recalibrated:
• Whenever the conductivity probe is replaced.
• At least once a week.
• Before USP measurements.
• After testing aggressive chemicals.
• When calibration reminder is activated (“
Conductivity Cal Expired
”).
• If the readings are far from the calibration point.
Note:
TDS, Resistivity and Natural Sea Water and Practical Sea Water Salinity readings are automatically
derived from the conductivity readings so conductivity calibration is required.
OFFSET CALIBRATION
The meter allows the user to calibrate the probe for an offset.
• Press
and then press
.
• Select the automatic standard recognition (see
Conductivity Setup
→
Calibration).
• Leave the dry probe in the air (infinite resistance).
• Enter in calibration mode by pressing
.
• Clear any previous calibrations by pressing
.
• Wait to stabilize. The 0.000 µS/cm calibration point will appear on the screen.
• Press
to finish the probe offset calibration.
• Press
to exit calibration mode or continue calibration in the other standard solutions.
Note:
The offset calibration can be performed only if it is performed first (no other calibration points
present). Clear the old calibration if it is present.
CELL CONSTANT CALIBRATION (in solution)
Single-Point Calibration
• Select the single point calibration (see
Conductivity Setup
→
Calibration).