as I was asked already several times how to do these measurements, I put here some information on how to do it

goal of such measurements: record events with closed lid to study what events occur in that case
the bias might be switched on of off for these events
bias on: probably muon events (they look different depending on the zd, also the rate changes)
bias of: only electronics noise triggering

== how to do such a measurement

=== sky position

in case you want to do it not in park position: 

in drivectrl: MOVE_TO <zd> <az>
(you just need to position the telescope, tracking is not needed)