Hoefer PR250 - Manual (Page 13)

8. Operation Instruction
Setting speed and time
a) When the instrument powers on, the display
screen will show 88:88. The instrument will go
through a diagnostic step then beep.
b) When ready, the time display window will show
09:30 as the set Time, this indicates a running
time of 9 hours and 30 minutes. The speed
display window shows
200, indicating the shaking
speed is set to 200 rpm.
To change the settings, press the knob and release,
the digit of the speed display will begin blinking. To
increase the speed, turn the knob clockwise, and to
decrease the speed turn the knob counterclockwise.
Press the knob and release again the minutes
display will blink. To increase the time turn the knob
clockwise, and to decrease the time turn the knob
counterclockwise.
Press the knob and release a third time, the hours
will blink. Increase the time by turning the knob
clockwise, and decrease the time by turning the knob
counterclockwise.
When complete wait 4 seconds for the display to stop
blinking, and the set value will remain. To start the
unit, press the knob for approximately 1 second.
The PR250 can be set to run continuously — turn the
time setting knob counter clockwise until “
00:00”
appears in the display; the PR250 is now set to
continuous.
Note: While turning speed control knob
counterclockwise “
OFF” may appear in display, this
indicates the speed is set to zero.
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p7
Press and release
Press and release
Press and release