In-Situ Aqua TROLL 400 Operators Manual - Manual (Page 28)

800-446-1500 28 www.in-situ.com
Conductivity Calibration
The conductivity sensor is calibrated with NIST-traceable standards at the factory,
which provides a high degree of linearity across the entire operating range of 5 to
100,000 µS/cm. This sensor is capable of meeting its published specifications without
requiring additional calibration by the user. Most commercially available standards can
introduce a larger potential measurement error than the sensor’s initial factory
calibration.
User calibration is recommended only if you must conform to a standard operating
procedure or if the conductivity cell has undergone physical change (e.g., deposits on
conductivity cell walls that cannot be removed or physical damage to the conductivity
cell walls).
1. Fill the calibration cup to the fill line with approximately 130 mL of the desired
calibration solution.
2. Place the instrument in the solution taking care to not force the solution out the top
of the calibration cup.
3. In Win-Situ 5 Software, select the Conductivity sensor.
4. Click the Calibrate button in the left corner of the screen.
5. Select either 20° C or 25° C as the reference temperature, as indicated by the
reference calibration solution.