The DRS, ERS or SRS alarm state indicates that there is high electrical resistance or an open circuit in the suppressor device typically in the regenerant channel or there is an issue with the connectivity of the suppressor to a power supply.
High resistance or an open circuit occurs when:
- The suppressor is not connected to the power supply or has a defective cable. In this state, the only indicator from the system is a high voltage alarm. In this state, no current can be applied to the suppressor.
- The suppressor is operated with higher currents than the recommended currents.
- Refer to the current settings section to determine the correct current and lower the current.
- The suppressor is exposed to contaminants such as iron, other metals or organics.
- Refer to the appropriate cleanup procedure and implement the recommended cleanup. In cases when the contamination is continuous, a routine cleanup step on a weekly basis is recommended as part of preventive maintenance.
NOTE
If the above problem is encountered on a routine basis, particularly with samples containing high levels of metals or solvents, the chemical mode of operation is recommended. The Dionex CRS 500 is recommended for the chemical mode of operation; the Dionex DRS 600 can be operated in the chemical mode, but with reduced suppression capacity.