Calibrating the ICS-900 Conductivity Cell

Ensuring System Wellness (IC Devices)
Calibrating the ICS-900 Conductivity Cell

When to Calibrate:	After installing a new cell Every 6 months

Items Needed:	1.0 mM KCl solution: Prepare by dissolving 0.07456 g of reagent-grade KCl in one liter of 18 megohm deionized (DI) water Backpressure tubing to provide at least 7 MPa (1000 psi). Use 0.076 mm (0.003 in) ID yellow PEEK tubing (P/N 049715)

Use an Allen wrench to remove the two screws securing the conductivity cell housing to the ICS-900 component mounting panel.
Pull the cell housing straight out from the component mounting panel to unplug the cell from its electronics. Let the cell hang by the tubing.
Open the ICS-900 System Wellness Control Panel (see Opening a Wellness Control Panel).
Under Conductivity Cell, click the Calibrate Offset button. A panel with instructions and command buttons will open.
Follow the instructions on the panel to complete the conductivity cell offset calibration procedure. The new offset is determined and stored as the current value.
To reinstall the cell, on the mounting panel, align the 9-pin connectors on the cell housing with the component mounting panel and plug the cell back into the electronics. Replace the mounting screws (removed in Step 1) and tighten.
Under Conductivity Cell, click the Calibrate Slope button. A panel with instructions and command buttons will open.
Follow the instructions on the panel to complete the conductivity cell slope calibration procedure. The new slope is determined and stored as the current value.
After calibration, the conductivity reading should be 147.00 ± 2 mS/cm. If this is not the case, call Dionex for assistance.
Flush the KCl solution from the system by pumping DI water through the cell. When the conductivity drops to near zero, stop the pump flow.
Reconnect the pump to the injection valve and reconnect the line from the suppressor to the cell inlet.