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4. Operation

4.1 Switch on/off

1. Switch on: Press button 1 for over a second to switch on the instrument; the green indicator (2) will light up.

2. Switch off: Press button 1 for more than 1 second to switch off the instrument; both indicators will turn off.

4.2 Reverse mode

Press the button 1 to switch ON/OFF the reverse mode and invert the stirring direction at regular intervals.

(1) ON: The stirring direction will be reversed every 15 seconds. The function indicator 2 will flash when the

reverse mode is ON.

(2) Off state: The stirring direction will stay the same, function indicator 2 stays lit.

4.3 Speed setting

(1) Press the button 4 (+ and -) to reduce or increase the speed, the stepping rate is 10 rpm.

(2) Long press the button 4 (+ and -) to change the set speed continuously, the speed indicator 3 flashes during

the operation.

(3) When the set speed reaches the max. speed (1500 rpm) or min. speed (15 rpm), the display indicator 3 will

stop flashing.

(4) The display indicator 3 will stop flashing and stay lit once the actual speed reaches the setspeed.

5. Faults

• Instrument cannot be switched ON.

➢ Check whether the power line is unplugged.

• Fault in the ignition test.

➢ Switch OFF the unit and then switch it back ON.

• The stirring speed cannot reach the set point

➢ Excessive medium viscosity may cause an abnormal motor speed reduction.

• The equipment wont turn OFF by pressing the switch.

➢ Check whether the residual heat warning function is still on and the hotplate temperature is still

above 50 ºC (the LED screen is still working and “HOT” appears on the screen).

If these faults are not resolved, please contact the manufacturer/supplier.