IKA C-MAG HS 7 control Instructions Manual page 13

Intermittent mode / Rotation direction:
Intermittent mode:
In intermitted mode, the stirring function is interrupted cyclically� The run time (0 / 10 sec – 10
min, 10 sec steps) and pause time (3 sec – 5 min, 1 sec steps) should both be set� When the
intermittent mode is activated, a decimal point appears on the display (
Rotation direction:
You can select the continuous rotation by setting the time to 00:00:00 via pushing the rotating /
pressing knob (D)� Afterwards the rotation direction can be selected by turning the rotating /
pressing knob (D)�
Alternatively to continuous stirring, you can set the direction of rotation reversal� Then the
rotation direction changes after each pause�
In this way the magnetic rod is captured and any liquid still rotating is gradually slowed down�
Then the drive accelerates to the target speed�
Beep:
The menu item "Beep" allows the user to turn on / off the sound that occurs when the timer
reaches 00:00:00 or an error message appears�
Error 5:
Providing safety protection, Error 5 is taken to recognize that the sensor has not been placed in
the medium when the heating is switched on�
! Notice!
You can set a value from 1 to 30 min for this time limit depending on the application� If time limit
is set to 0 min, the "Er05" detection is disabled�
Caution!
This function will only be active if:
› sensor temperature is < 50 °C
› difference between target temperature and sensor temperature > 5 K�
Timer expired:
You can specify the procedure of heating and stirring function if the timer achieves 00:00:00�
Next to the visually / audible information you can decide independently if the heating and stir-
ring should be stopped automatically if the timer is expired or should continue�
Caution!
Switching off the stirring function can lead to a delayed boiling�
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Safe / Visc:
Once the "VISC / SAFE" has been set to "VISC", the viscosity trend value will be shown on the
display� The torque trend measurement is used to deduce the change in viscosity of the reaction
medium� The devices are not designed to measure absolute viscosity� They only measure and
)� display the relative change in the viscosity of the medium from a starting point specified by the
user�
Once the speed of the motor and magnetic rod in the medium have stabilized to the target
speed, the viscosity measurement is started at 100 %� The change in the viscosity is then shown
in %�
The value can always be reset to 100 % by pushing the "Menu" button for 2 seconds�
Torque trend measurement only works for a constant set speed for the duration of the meas-
urement� As a result, intermittent mode cannot be used in conjunction with torque trend meas-
urement�
The current control variable is saved as the reference 100 % ΔP and shown on the digital dis-
play� The change in the viscosity is then shown in %�
When on the "VISC" screen, the screen will switch to "SAFE" if the adjustment of the safety
temperature is activated, during which you may set the safety temperature and the screen will
switch back to "VISC" once the setting is done, otherwise it will switch back to "VISC"�
Factory reset:
The menu item "Factory reset" allows the user to reset all the system settings to the original
standard values set at dispatch from the factory (see "Menu structure")�
Probe calibration:
In order to use tolerances to limit temperature deviations, the user can calibrate the tempera-
ture sensor in conjunction with the device�
2-point calibration:
Calibration using two temperatures�
For calibration, select a suitable stirring speed for the application�
Use a calibrated temperature reference meter for control�
!
Notice!
!
Notice!
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