The RESISTOMAT® model 2311 has been designed and optimized for high-speed applications in automation systems. Up to 100 measurements per second can be achieved. It works on the basis of the welltried four-wire measurement method in which test-lead resistances and contact resistances are eliminated. The instrument leads are monitored for damage by a built-in open circuit detector.
A 2-way and 4-way comparator with switching outputs is available for classifications and selections. Of course, temperature compensation is available for any test object material. Specific temperature coefficients can be entered. Temperature recording takes place using a PT100 sensor or a temperature transmitter (pyrometer) with an analog output.
A special circuit for protecting the measurement input when measuring inductive test objects has been developed to prevent damage to the meter from voltage peaks produced when the test object is disconnected.
A special area of application is the measuring of contact resistances (dry circuit measurement), since the load voltage is limited to 20 mV in order to avoid so-called “fritting” (DIN IEC 512).
All device settings can be individually stored in up to 32 measuring programs. Of course, all device settings can also be made via the Ethernet, USB (default) or fieldbus interfaces (optional). Up to 900
measurements per measuring program can be stored using the integrated data logger.