Thermo Scientific 5028i Instruction Manual page 153

Calibration
Calibration Procedure
This procedure will take approximately 30 minutes until completed.
Thereafter, a high voltage (HV), beta reference threshold and alpha
threshold will be assigned a new valve. Detector Calibration B
please refer to Detector Calibration as above description, another
approximately 30 minutes is needed until completed.
Thermo Fisher Scientific Model 5028i Instruction Manual 4-11