Setting The Operating Modes; Setting The Safety Temperature - IKA HB digital Betriebsanleitung

Setting the operating modes

Operating mode A
• Switch on the device at the mains switch (B).
• The heating function is switched off.
• Safe Temp (safety temperature) will appear for 5 seconds. (Fig. 5)
• The target value is set to 20 °C.
• The controller tempering medium is set to water.
• The heating function must be restarted following a power failure.
• The following settings are possible/adjustable:
- the target value,
- the safety circuit,
- the controller tempering medium.
• Mode A always appears on the top of the screen.
Factory setting: Mode A
Operating mode B
• Switch on the device at the mains switch (B).
• The heating function is switched off.
• Safe Temp (safety temperature) will appear for 5 seconds.
• The target value is set to 20 °C or the most recent temperature
setting.
• The controller tempering medium is set to water or the most
recent medium setting.
• The heating function must be restarted following a power failu-
re.
• The following settings are possible/adjustable:
- the target value setting,
- the controller tempering medium.

Setting the safety temperature

Safety circuit
The adjustable safety circuit prevents the temperature of the heat-
ing bath from getting too high as a result of:
- a controller error,
- the rotating/pressing knob having been accidentally turned.
Once the safety temperature has been reached, the device switch-
es off permanently.
Furthermore, dry running of the heating bath is detected. The de-
vice switches off permanently.
The dry running function detects both accidental heating of the
heating bath without liquid and dry running caused by water
evaporation starting at a set temperature of 60 °C. The error mes-
sage E 26 appears and the heating bath is switched off perma-
nently. To remedy this error, see "Error codes".
When the safety circuit is set, an upper temperature limit between
50 and 190 °C is defined.
• Silicone oils as tempering media
When increased safety is not necessary the temperature of the
safety circuit stays at 190 °C.
Temperature of the tempering medium rises to a maximum of
190 °C in the case of an error. Then the safety circuit switches
the heating bath permanently off.
• Demineralised water as the tempering medium
When increased safety is not necessary, the adjustment knob of
safety circuit stays all the way to the right. As long as there is any
demineralised water in the heating bath, the temperature of the
tempering medium rises to a maximum of 100 °C, in the case of
an error. If the water is evaporated completely, the temperature
of the tempering medium rises to a maximum of 190 °C. Then
the safety circuit switches off the heating bath permanently.
• The safety circuit is set to the most recently set value and cannot
be adjusted.
• Mode B always appears on the top of the screen.
Operating mode C
• Switch on the device at the mains switch (B).
• The heating function is switched on or off depending on the last
selected setting.
• Safe Temp (safety temperature) will appear for 5 seconds.
• The last target value set in mode B applies.
• The setting controller tempering medium set before the device
was last switched off in mode B applies.
• The following settings cannot be adjusted:
- the target value,
- the safety circuit,
- the controller tempering medium.
• Mode C always appears on the top of the screen.
Switching the operating modes
• Switch the device off at the mains switch (B).
• Press and hold rotating/pressing knob (C) and switch the device
on at the mains switch (B). Release the rotating/pressing knob
(C) after 2 seconds. The new operating mode appears and fla-
shes 3 times on the top of the screen.
• Sequence A, B, C, A etc.
• Temperature-sensitive or easily flammable media in the ro-
tary evaporator
When the pre-set bath temperature may not be exceeded under
any circumstances set the safety temperature as described be-
low.
Adjusting the safety temperature
- Set the desired safety temperature by turning the rotating/pres-
sing knob (C) within the 5 seconds of the "SAFE TEMP." appear-
ing on the display after the device is switched on. (Fig. 5)
Checking the safety circuit
- The safety circuit has to be checked by the user once a year.
- Fill the heating bath with 1 liter of water as tempering medium.
- Set the safety temperature to 100 °C.
- Set the set temperature to 80 °C.
- Start the heating function by pressing the rotating/pressing
knob (C).
- When the set temperature is reached, turn the heating bath off
and on again at the mains switch (B).
- Set the safety temperature to 70 °C.
- The medium temperature is thus 10 K above the safety tem-
perature, the safety circuit trips, the display shows E 24. (Fig. 7)
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