Patent ID: 11879851
Assignee: BECKMAN COULTER, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. The luminometer of claim 1, wherein:
the light detector is a photomultiplier tube configured to sense photons emitted from an assay reaction over a period of time;
the conversion circuit includes an analog circuit configured to provide an assay analog voltage based on the photons emitted from the assay over the period of time, the analog circuit comprising:
a current sensing resistor coupled to convert current from the photomultiplier tube to a voltage;
an amplifier configured to amplify the voltage; and
a dedicated electrical connection between a terminal of the current sensing resistor and a terminal of the amplifier;

the conversion circuit further includes a counter circuit configured to provide an assay photon count based on the photons emitted from the assay over the period of time; and
the luminometer controller is configured to:
in response to the assay analog voltage being greater than a predetermined value, calculate a relative light unit value of the photons emitted from the assay over the period of time based on the assay analog voltage and an optimized linear function.