CL 7685.001
PID controller for D.Ozone, Residual Chlorine
Add the following to the common Features/Specifications of the 7685 Series shown overleaf
• Applications:
- Ozone generators
- drinking water
- water treatment
- bottling industry
- OEM
• Input from
- Potentiostatic sensor
- Polarographic selective membraned sensors:
- Total Chlorine gas sensing method
• Input from Pt100 3 wires
• Ranges: 0/2 PPM - 0/20 PPM - 0/200 PPM autoranging
• Dual filter software
• Calibration mode: immediate or postponed
• Calibration parameters display
• Dual set-point and alarm conditions display
• Temperature display
• Automatic or manual temperature compensation
• Isolated output:
- 0/20 mA or 4/20 mA selectable
- programmable input on the span
• PID output:
- 0/20 mA or 4/20 mA isolated output
- dual relay for stepping motor
• Automatic or manual operation
• Alarm on set-point deviation
• Continuous/flashing alarm
• EEPROM parameters storage
• Automatic overload protection and reset
• Extractable terminal block
• 96x96 (1/4 DIN) housing
Compatible accessories
SZ 283
Potentiostatic measuring sensor
SZ 7231
Flow cell for Chlorine and D. Ozone
SZ 7233
Flow cell for Chlorine / D. Ozone, pH, ORP sensors
SZ 7251
Autoclean flow cell
CL 7901
Flow cell and sensor for Free Chlorine
OZ 7901
Flow cell and sensor for D. Ozone
Specifications
* Measuring : D.Ozone/Residual Chlorine
* Measuring cell : Potentiostatic/Polarographic
Polarographic cell
Current : 160 nA/PPM at 20 °C
* Scales : 0/2.000 PPM - 0/20.00 PPM -0/200.0 PPM
Zero adjustment : ± 200 nA
Cell sensitivity : 12.5/250 %
Potentiostatic cell
* Scales : 0/2.000 PPM - 0/20.00 PPM
Zero adjustment : ± 2 μA
Cell sensitivity: 12.5/250 %
* Polarization : -200 mV (0/-1250 mV)
* Filter software 90%RT: 0.1/20.0 s for small/large variations
Temperature
Input: Pt100 3 wires
Measuring and compensation range: -2/52 °C
Manual temperature: -2/52 °C
Resolution: 0.1 °C
Zero adjustment: ± 1 °C
* Temperature coefficient: 0/4.0 %/°C
Regulation:
* 4/20 mA or 0/20 mA/Stepping motor
* Motor time: 10/120.0 s
* Dead time: 0/20.0 s
Manual starting position: 0/100.0 %
Set-point: any value in the measuring range
* Dead band: 0.2/20.0 % (stepping motor)
Proportional band: 0.1/400.0 %
* Derivative: 0/1200 s
* Integral: 0/3600 s
Option 091.4143
9/36 VDC power supply