Lauda RP 4050 C, Руководство по эксплуатации

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The pump connections on the unit are fitted with M16 x 1 thread.
The Varioflex pump operates short-term up to viscosity of 150 mm²/s. In the closed-loop control mode 50 mm²/s
should not be exceeded. The temperature control is the best with 30 mm²/s and lower viscosity.
For operation as a circulating thermostat with an external load, the highest possible power level is practicable to
maintain the temperature difference low, among other things also with higher temperatures in conjunction with oils
as heat transfer liquid.
Pump characteristics (

11).
4.4 Materials
All parts being exposed to the heat transfer liquid are made of high quality material appropriate to the operating
temperature. Non-rusting stainless steel and high quality temperature-resistant, primarily solvent-resistant plastics are
used.
4.5 Temperature display, control and safety circuit
The Master control element is equipped with a 5-character green LED display, which is used for the display of the
measurements and settings, as well as the operating status. The entry of setpoints and other settings occurs under menu
guidance via four keys.
The more comfortable and removable Command remote control includes a backlit graphical display. The entry of the
setpoint and other settings occurs under menu guidance via situation-dependent cursor keys and soft keys.
A Pt100 temperature probe acquires the current temperature in the bath. A high-resolution A/D converter processes
the measurement. Further measurement conditioning occurs using a special control algorithm for controlling the heater
actuator, which has a low reactive effect on the mains, and the SmartCool refrigeration equipment together with
further transducers.
An external Pt100 temperature probe can be connected via a socket (10S) for the acquisition of an external
temperature. This value can be displayed and, if required, used as the controlled variable with external control (Master)
switched on. In this way, the system controls the external measurement and not the internal bath temperature (

7.5.4).
The safety system conforms to DIN EN 61010-2-010. The SelfCheck Assistant monitors about 50 unit parameters.
A dual-channel system is used in which two microcontrollers monitor one another. Along with the bath temperature
measurement and control probes, there are also two safety temperature probes (Pt100) for the safety circuit for the
overtemperature cut-off and for monitoring the bath temperature probe.
The overtemperature cut-off point is displayed on pressing the key
on the Master.
Changing the overtemperature cut-off point: (

7.2 Switching on) on page 39.
The bath level is acquired by the SelfCheck Assistant in 8 stages. If the minimum level is undercut, the pump, heater
and the SmartCool System refrigerating machine are switched off. The reaction of the thermostat in case of overfill can
be set to simply display a warning, to display a warning and switch off the heater or to switch off the unit completely with
pump, heater and SmartCool System refrigerating machine.