Heidolph Hei-TORQUE Core, Operating Instructions Manual

Page: 47 / 88

47
Overload protection
The device is equipped with an overload protection function: The performance indicator
on the display (see section “Overview of the Hei-TORQUE Core overhead stirrer” on
page 39) visualizes the effective loading in the form of a progress bar.
In case of an overload (e.g. if speed is too high in highly viscous substances), the
outermost right-hand segment of the performance indicator flashes. In this case,
reduce the rotation speed until the performance indicator returns to normal mode.
In the event of persistent overload and in case of a blockage, the rotational movement
is stopped. In this state, two restart attempts are started automatically. If the load does
not reduce sufficiently, the rotational movement is switched off.
In this case, check the stirrer tool and the device for blockages and adjust the rotation
speed to the substance to be processed if necessary. The rotational movement can then
be started again normally.
Timer function
The timer function can be used to preselect a required stirring duration. If the timer
function is activated, the timer symbol appears on the left at the top of the display, see
also section “Overview of the Hei-TORQUE Core overhead stirrer” on page 39.
Activate and set the timer as follows:
➜ Make sure that the rotational movement has stopped. Otherwise, the timer cannot
be activated and set.
➜ Press the [
Timer
] button on the front of the device:
– The [
Timer
] button lights up.
– The [
Timer
] Settings menu opens.
➜ Use the speed controller to select the [
Timer set
] menu option.
➜ Press the speed controller to confirm the selection.
➜ Select the [
hh
], [
mm
] and [
ss
] options one after the other, and set a required
stirring duration in hours, minutes and seconds (from one second up to 99 hours,
59 minutes and 59 seconds).
–
Confirm each individual value by pressing the speed controller.
– Turn the speed controller to mark (select) and adjust the next value.
– After confirming the value for seconds, the [
ON
] option is selected
automatically: Press the speed controller to confirm and activate the timer.
➜ The timer is started on starting the rotational movement.
For physical reasons, the maximum speed can only be reached
after a certain delay. This factor must be taken into consideration,
in particular if, in timer mode, high speeds are to be reached in a
very short time.
The effective delay until the required rotation speed is reached
depends on the prevailing ambient conditions, on the stirrer tool
used, and the substance processed.
Operation