Final answer:
Without specific information on the Hydro-Light detector, it's not possible to provide an accurate answer; consulting the instrument's manual or manufacturer is recommended for operational procedures.
Step-by-step explanation:
The question posed seems to be related to a specific instrument called the Hydro-Light detector, which does not appear to be a standard piece of equipment widely recognized in the scientific community. Typically, the use of any analytical instrument, including detectors used in chemistry or environmental science, involves specific steps for calibrating, initializing, and scanning which are detailed in the manufacturer's manual or technical documentation. Without access to the specific manual or technical documentation for the Hydro-Light detector, it would be inaccurate to provide a definitive answer to the question regarding how long the unit takes to fully update and how many scans it will perform. As of my knowledge cutoff date in 2023, the best course of action would be to consult the manual for the Hydro-Light detector or contact the manufacturer directly for the most accurate and up-to-date operation procedures.