Retsch SR 300 - Manual (Page 17)

2/8/2012

Retsch GmbH
17
0002
General
Cleaning
SR 300
Fig. 14
The grinding chamber in the SR 300 can be cleaned with a brush and,
if necessary, an industrial vacuum cleaner and compressed air.
The motor brake can be released to facilitate cleaning the SR 300
grinding chamber; use lever F (Fig. 14) to do so. The rotor-beater can
now be turned easily, thus simplifying 0cleaning.
The SR 300 is engineered to IP 54 safety standards.
!
Never clean the SR 300 with running water.
Hazard of fatal electrical shock.
Sieves, grinding inserts and rotors
Once they have been removed from the SR 300, these items can be
cleaned under running water or in an ultrasonic bath.
Dry all wet parts thoroughly after cleaning.
Rust can form on wet components.
Maintenance
The SR 300 is largely maintenance-free.
Required inspections
The limit switches and the motor brakes are to be checked twice a year
for proper operation.
Limit switch on the left, at the door hinge

The limit switch must shut down the motor at a maximum opening
gap of 3 mm.
Limit switch on the right, at the quick-acting catch

The motor brakes must engage when the hand wheel is turned by a
maximum of 45°.
Motor brakes
 Start the SR 300.
 Stop the SR 300.
 Use a stopwatch to time the braking period.
 If the braking period should exceed 1.5 seconds, then contact the
authorized service technicians.