Operating instructions

Charged Aerosol Detectors
Corona Veo and Corona Veo RS
Page 70 Operating Instructions
5.7 Internal Safety Features
5.7.1 Leak Detection
When a leak occurs that originates from the capillary connections to the nebulizer or
stream-switching valve (Corona Veo RS only) and the leak sensor reports a leak, a warning
code appears on the detector display.
When the leak sensor reports a leak, eliminate the cause for the leakage and dry the leak
sensor (→ page 112).
Tip: If you operate the detector from a chromatography data system, a warning code
will also be documented in the audit trail of the software.
5.7.2 Internal Liquid Detection
A liquid sensor is installed inside the detector to detect excess liquid build-up in the event of a
flood within the detector.
When excess liquid is present inside the detector;
• A critical error code appears on the detector display.
• The detector will exit the Run mode. If you operate the detector from chromatography
software, the running batch is aborted.
• If the Pump Off relay has been connected, the pump will stop mobile phase flow.
• Corona Veo RS: The stream-switching valve will actuate and divert the liquid flow away
from the detector.
• The drain pump will turn on automatically.
Tip: If you operate the detector from a chromatography data system, an error
message will also be documented in the audit trail of the software.
When the sensor reports excess liquid in the interior of the detector, stop the mobile phase
flow, if not already done, and leave the gas flow turned on. If there is only a small amount of
liquid present inside the detector, the liquid may evaporate. If the error code continues to
appear on the display, note the error code and contact the Thermo Fisher Scientific Service for
Dionex HPLC products.