The Noris RP5/RPT5 Limit Value Switches are designed to monitor the temperature in a two-wire circuit. The resistance increases as the temperature rises, because of a platinum resistor that has a positive temperature coefficient. There is acces to a trimming potentiometer to permit a line compensation to be applied for PT100 RTD limit-value switches.
The PT1000 RTD’s do not require such compensation because line resistance can be neglected. Three measuring ranges are prepared for better adaptation to the required measuring task. The settings of the switching point are made at the short top side of the switch trough a drum scale. The scale is graduated in degrees Celcius to suit specific measuring ranges. Any value on the drum scale can be selected as the switching point.
Features
Straightforward application
Suitable for severe operating conditions
Compact construction
Switching point freely adjustable by drum scale
Anti-tamper seal for drum scale
Volt-free output as make-and-break contact
Open-circuit or closed-circuit variants available
Short circuit monitoring of input signal
Broken-wire monitoring of input signal
Operating characteristics displayed by integrated LEDs
Flame-inhibiting and self-extinguishing body
Suitable sensors are available (Noris sensors TP.1, TP.2, TP.3).
