The QC was diluted – AESQC QCs are pre-diluted, ready to use and should be run neat
The QC vial did not contain enough reagent – use a new QC vial
The QC was expired - use a new QC vial
Instrument Failure: – Check for error messages (printed or displayed). Refer to the troubleshooting section of the instrument user manual.
Reagent, Quality Control Materials, Calibrators: – Incorrect reconstitution, i.e. wrong or contaminated diluent or use of the wrong volume of diluent