Hach TU5 Series User Instructions page 12

Startup
Set the power to on
Personal injury hazard. Never remove covers from the instrument. This is a laser-based instrument and
the user risks injury if exposed to the laser.
Personal injury hazard. Do not look into the vial compartment when the instrument is connected to
power.
After the automatic cleaning module is installed, set the controller power to on.
12 English
C A U T I O N
C A U T I O N