Haefely's 2830/2831 is the result of extensive research and years of experience testing
dielectric properties of liquid and solid insulating materials. It incorporates a fast and highly
advanced procedure to measure capacitance, tangent delta (dissipation/power factor),
resistivity, and relative permittivity of liquid or solid insulating materials.
A simple one-time-connection system together with resistivity measurement according to
pre-selected standards drastically reduces measuring time.  The system consists of 2830,
the measuring bridge and control unit, and 2831, the extension unit. This system is a
complete replacement of the Tettex 2821 and 2822. The 2830 contains the controller and
the measurement part of the system. The 2831 extension unit contains a standard capacitor,
2.5 kV AC & DC power supplies and a temperature control unit.



  • Measure capacitance, tan delta (dissipation factor), resistivity and relative
    permittivity of liquid and solid insulating materials
  • Large 12’’ touch display
  • Customized programmable sequences and manual mode
  • Integrated AC power supply 5 – 2 500 V and 40 – 65 Hz
  • Integrated DC power supply 5 – 2 500 V
  • Two independent integrated temperature control units
  • Integrated ambient temperature and humidity sensor
  • Possibility to connect two oil test cell heaters 2903 or one solid test cell 2914
  • Existing Tettex test cells 2901 (from 1990 and later) and 2914 (from 1985 and
    later) can be used
  • Data transfer over USB memory stick