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| | RT32 | RT50 | RT61 |
| Seven-line clear-text LCD display. Choice of languages |  |  |  |
| Simultaneous readout of temperature set-point and actual values |  |  |  |
| Choice of temperature display (decimal place) |  |  |  |
| Temperature limit values (+/–) adjustable |  |  |  |
| Fluid temperature control |  |  |  |
| Control of the consumer temperature with cascade control for highest temperature constancy with 2 control circuits (consumer and fluid) |  |  |  |
| Set-point switch-over (value 1/value 2) |  |  |  |
| External sensor connection for Pt100, J (Fe-CuNi), K (NiCr-Ni) or T (Cu-CuNi) |  |  |  |
| Leak-stop operation |  |  |  |
| Drainage of the fluid from the consumer by suction |  |  |  |
| Drainage of the fluid from the consumer by compressed air |  |  |  |
| Time switch |  |  |  |
| Flow rate measurement from 2 to 200 l/min for water and oil up to 350 °C |  |  |  |
| Inlet sensor (Pt100) |  |  |  |
| External control: set-point switchover, heating/cooling command |  |  |  |
| External control: set-point input, switching the unit on/off |  |  |  |
| Data interfaces |  |  |  |
| Scalable recorder outputs |  |  |  |
| All disturbances in the unit are indicated on the display |  |  |  |
| Set-point “blockable” as protection against incorrect adjustment |  |  |  |
| Limitation of max. programmable set-point |  |  |  |
| Monitoring of upper and lower limit values |  |  |  |
| Unauthorized access to the programming levels prevented by a code |  |  |  |
| Automatic pump rotation correction |  |  |  |
| Sensor-failure monitoring |  |  |  |
| Automatic switch-over to the internal sensor (fluid) in the event of external sensor failure |  |  |  |
| Units with automatic water refilling: In order to limit the consequences of leakage (i.e. hose burst) the filling time per refill and the number of refills per hour is limited for the purposes of protecting the production installation against damage caused by water |  |  |  |
| Common accoustic alarm (150 option) |  |  |  |
| Indication of the service interval |  |  |  |
| Operating hours meter |  |  |  |
| Programmed data remains stored during replacement of electronic components |  |  |  |