C 7685 E.Conductivity analyzer

The controller can be configured to use 2-electrodes conductivity cells, amplified 4-electrodes and amplified inductive cells. It provides manual and automatic temperature compensation, if an RTD Pt100 is connected. When the RTD is connected, the instruments provides the temperature reading.
FeaturesTechnical DataApplications


  • Conductivity range: see table on the data sheet
  • Temperature range: -10/+110 °C, accuracy 0.1 °C
  • Analog output: 0-20 or 4-20 mA isolated. Programmable within the selected scale
  • 2 set-point with min/max function, hysteresys and delay time programmable
  • Min/max and set points timing alarm relay
  • Dual software filter for more steady measures
  • 3 software access levels, keyboard lock and access code number
  • Automatic recognition of the standard solutions
  • Operating mode: automatic and manual
  • Temperature readout
  • Operating mode: automatic and manual
  • Continuous or flashing alarm relay
  • Power supply: 110/220 V, 5 VA
  • Dimensions: 96x96x155 mm.  DIN 43700


091.3711   Dual analog output
091.404     Power supply 24 Vac
091.4143   Power supply 9/36 Vdc
091.701     RS232 isolated output

Technical Specifications
in addition to those common in the series 7685
Scales (See tables Scales vs. K)
* Autoranging: on/off
* Indirect scale: on/off
Zero adjustment: ±10 %
Sens. adjustment: 60/160 %
* Software filter 90%RT: 0.4/20.0 s for small/large variations
Measuring and compensation range: -10.0/+110.0 °C
Resolution: +/- 0.1 °C
Zero adjustment: +/- 1 °C
Manual Temp. comp: -10.0/+110.0 °C
091.3713 dual analog programmable and isolated output.
The operator may select an output forTemperature.
091.4143 9/36VDC power supply