Lauda PTT Operating Instructions Manual page 14

9. Setting the speed of the magnetic stirrer occurs by briefly pressing the control knob: As long as
the LED "" (4) is lit, the speed can be adjusted by turning the knob (steps 1...9). Stirrer activity
is indicated by the flashing of the control knob.
The magnetic stirrer is switched off by pressing the control knob again (step 0).
Three LEDs indicate the three operating statuses "Malfunction", "Heating" and "Cooling":
With "Malfunction" please note the error code indicated in the display, switch off the device at the
power supply unit and refer to the error messages. ( 6.1).
14 Installation and operation

Three seconds after entering a
new speed, the current sample
temperature is automatically dis-
played again.
Malfunction Heating Cooling
YAME0020 / 30.06.11
PTT