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Caution! Always make sure the "Heating" function is switched off
before starting the timer. Then switch on the timer followed by
the "Heating" function.
• Displaying the timer
Press the "Mode" membrane key to display the remaining time.
The "Temperature", "Speed" and "Timer" values will be displayed.
If you switch on the "Stirring" function when the timer is activated,
the timer will not restart.
To switch on the "Stirring" function, press the "Mot" membrane
key.
• Changing the timer
Activate the timer by pressing the "Timer" membrane key.
Set the desired time (0:00 - 9:59 h) by turning the left knob minu-
te by minute.
Confirm by switching the "Heating" function off and back on
again.
• Stopping the timer
To stop the timer during countdown, switch the "Heating" func-
tions off. You can then switch the heating and/or stirring func-
tion(s) back on and the DIGITAL-T will function in continuous
mode.
Once the countdown has finished, an audible signal will be given,
the "Heating" function will be switched off, the "Stirring" func-
tion is still active. The display will remain lit up for as long as the
power supply is on.
• Timer in modes B and C
If the appliance was switched off before the countdown had finis-
hed, the timer will run for the remaining time the next time the appli-
ance is switched on.
If the appliance was switched off after the timer had finished, the
set values will be retained, however the "Heating" and "Stirring"
functions will be switched off.
Caution! To switch off the timer in C mode, switch off the
"Heating" function. Switch the "Heating" function back on without
activating the timer function or set the timer to 0:00.
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• Timer in mode X1
In mode X1 the DIGITAL-T functions the same way as in mode A
with the following differences:
The allocation of the two PT 1000 temperature sensors (heat car-
rier and reaction medium) is fixed.
No error 5 when the PT 1000 temperature sensor is removed
from the reaction vessel (the temperature of the sensor continu-
es to be displayed). The heat carrier sensor continues to be moni-
tored.
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Tips
• Ensure that the medium is well mixed (high speeds and large
stirring bars ensure good mixing). A medium which is well mixed
will ensure uniform temperature distribution and better tempe-
rature control.
• The temperature sensors (PT 100, PT 1000) should be immersed
to the maximum possible depth. The minimum immersion depth
is 20 mm; do not go below this immersion depth.
• When using metal vessels, do not place the temperature sen-
sors on the bottom of the vessel. Placing sensors on the vessel
bottom can cause excessively high temperatures to be measu-
red especially in media which have poor conductivity. The tip of
the measuring sensor must be at least 5 mm from the vessel
bottom; a distance of 10 mm is ideal.
• With highly viscous reaction media, the distance between the
heating plate and the stirring bars must be kept as small as pos-
sible (to reduce the risk of stirring bar breakaway).
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