== P3.25	Detector gain == 
•	**Phase**		:	3  
•	**Status**		: 	Draft	 
•	**Category**		: 	Daytime calibration (C3)
•	**Recurrence**	: 	once every month starting from commissioning.
•	**Duration**		: 	20 minutes
**Description**
•	Monitor detector gain factor, RON, and non-linearity over time.
**Prerequisites**
•	Instrument and dome closed
**Procedure**
•	This calibration is performed by reading the detector without any light illumination i.e. using an opaque position during 600s. 
•	Continuous extended source in the calibration; various ND; various integration times. CI in B_H.
**Success criteria**
•	5% expected accuracy. 
**Notes**
•	Same as activity 9.2 in AD4
**LBTO support**
•	Support from LBTI/LBTO?
**Associated SHARK-NIR personnel**
•	JF, LM, MdP
**Date performed and by whom**