The Dionex SC-CERS 500 uses water as the regenerant and has the ability to provide continuous suppression. The Dionex SC-CERS 500 suppressor uses the same current in External Water Mode as Recycled Eluent Mode. See Recommended current settings to determine the correct amount of current that should be applied to a Dionex SC-CERS 500.
Always operate the Dionex SC-CERS 500 at the lowest current setting that will suppress the eluent. Increasing the current setting will not improve the performance and could damage the suppressor. The operation of the Dionex SC-CERS 500 requires a constant flow of the water over the membrane, in a direction that is concurrent to the flow of the eluent.
The AutoSuppression External Water Mode requires an external source of deionized water for the regenerant chambers. When the Dionex SC-CERS 500 is operating in this mode, the amount of water flowing through the regenerant chambers is independent of the eluent flow rate.
The AutoSuppression External Water Mode is the mode used when up to 40% organic solvents are present in the eluent. It eliminates the potential for buildup of contaminating ions resulting from the oxidation of solvents.
The Dionex SC-CERS 500 must be operated in the AutoSuppression External Mode with eluents containing up to 40% solvent. When using solvents in the eluent it is strongly recommended to use an ED50A, CD25A, IC25A, or Dionex RFC-10 to optimize the current setting, which will extend suppressor lifetime.