Initial operation
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7.8 Set chiller mode
For a refrigerated circulator, the chiller mode is preset ex works to automatic
operation. Three different chiller modes can be selected in the operating menu:
• Auto: The controller calculates the duration of the heating process in the
event of a setpoint change of more than +5 K. Based on the calculated
heating duration, the control decides whether the refrigeration unit is to be
switched off or not, depending on demand.
• On: The refrigeration unit is permanently switched on during operation.
• OFF: The refrigeration unit remains switched off during operation.
The device is switched on.
The cooling machine is connected.
1. Press the [MENU] key.
2. Use the arrow keys to select the menu option <conF> and confirm with
[OK].
3. Use the arrow keys to select the menu option <cooL> and confirm with
[OK].
The menu option can only be accessed if the circulator detects a connected
refrigeration unit.
4. Select the desired chiller mode and confirm with [OK].
The display flashes briefly.
The chiller mode is set.
7.9 Set temperature warning limits
The low temperature <tLo> and high temperature <tHi> are adjustable
temperature limits that serve as warning limits for the device. If one of the
warning limits is exceeded during the course of a temperature control
application, then the device issues a warning with an acoustic signal and
displays an error code.
The device is switched on.
1. Press the [MENU] key.
2. Use the arrow keys to select the menu option <SAFE> and confirm with
[OK].
3. Use the arrow keys to select the menu option <tHi> and confirm with
[OK].
The set value for the high temperature limit starts to flash.
4. Use the arrow keys to set the parameter and confirm with [OK].
The decimal point starts to flash.
5. Use the arrow keys to set the decimal point and confirm with [OK].
The set value is confirmed by flashing briefly. The display switches to
<tHi>.
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