C 7685.001
E.Conductivity - Resistivity controller
Add the following to the common Features/Specifications
of the 7685 Series shown overleaf
• Applications:
- high purity water
- micro electronics industry
- electroplating
- pharmaceutical industry
• Scales in μS, mS and Mohm
• Autoranging
• Temperature readout
• Dual filter software
• Calibration parameters display
• Dual set-point and alarm conditions display
• Automatic or manual temperature compensation
• Table of high purity water stored into the microcomputer
• Isolated output:
- 0/20 mA or 4/20 mA selectable
- programmable input on the span
• Automatic or manual operation
• Dual Set-point with hysteresis, delay, and min/max
programmable functions
• Alarm:
- continuous/flashing
- min/max and delay programmable
- on Set-points timing
• EEPROM parameters storage
• Automatic overload protection and reset
• Extractable terminal block
• 96x96 (1/4 DIN) housing
Specifications
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
Manual Temp. comp: 0/100 °C
Options
091.3711 dual analog programmable and isolated output.
The operator may select an output for temperature.
091.701 RS232 isolated output.
The output sends the data (E.C., °C) to the serial port of
the computer.
091.404 24 Vac power supply
091.4143 9/36 VDC power supply
An option dual line display for E.C. and temperature readout is
available on request.