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C 7685.001 E.Conductivity resistivity analyzer

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The controller use 2-electrodes conductivity cells with K = 0.01 - 0.10 - 1.00 - 10.0 and it's designed for ultrapure water applications, down to 0.04 µS - 25 MΩ and over. 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

Specifications

  • 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
  • Ultrapure water temperature coefficient table stored in the microcomputer
  • Operating mode: automatic and manual
  • Continuous or flashing alarm relay
  • Power supply: 110/220 V, 5 VA
  • Dimensions: 96x96x155 mm.  DIN 43700

Technical Specifications
in addition to those common in the series 7685
Operating mode
Automatic/Manual
E.C. Cells
* K = 0.01/0.10/1.0/10 cm-1
* Input scales: 200.0 nS/20.00 mS (see table) readout in Mohm
* Autoranging: ON/OFF
Zero adjustment: +/- 10 %
Sens. adjustment: 60/160 %
* Temp. reference: 10/25 °C
* ATC coefficient: 0/3.50 %/°C
* Software filter 90%RT: 0.4/20.0 s for small/large variations
Display resolution: 1/1000 at 20 °C
Temperature
Input: RTD Pt100 2/3 wires connection
Measuring and compensation range: 0/+100 °C
Resolution: +/- 0.1 °C
Zero adjustment: +/- 2 °C
ManualTemp. comp: 0/100 °C
Options
091.3713 – dual analog programmable and isolated output.
The operator may select an output for Temperature.
091.4143 9 – /36VDC power supply

Applications C 7685.001

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