CL 7685
Potentiostatic controller for Free Chlorine, Chlorine dioxide, D. Ozone
Add the following to the common Features/Specifications of the 7685 Series shown overleaf
• Applications:
- drinking water
- bottling industry
• Input from:
- potentiostatic sensor
- Pt100 3 wires
• Ranges: 0/2 PPM and 0/20 PPM autoranging
• Dual filter software
• Calibration mode: immediate or postponed
• Calibration parameters display
• Dual set-point and alarm conditions display
• Automatic or manual temperature compensation
• Isolated output:
- 0/20 mA or 4/20 mA selectable
- programmable input on the span
• Automatic, manual or simulated operation
• Dual set-point
• Selectable actions
- ON/OFF
- PFM Pulse frequency modulation
- PWM Pulse width modulation
- hysteresis, delay, and min/max programmable functions
• Alarm:
- continuous/flashing
- min/max and delay programmable
- on set-points timing
• Autoclean relay
- auto + manual/manual action
- holding function for input and outputs
• EEPROM parameters storage
• Automatic overload protection and reset
• Extractable terminal block
• 96x96 (1/4 DIN) housing
Accessories
SZ 283
Potentiostatic electrode
SZ 7231
Flow cell for SZ283
SZ 7233
Flow cell for 3 sensors: SZ283, pH, ORP
SZ 7251
Autoclean flow cell
Specifications
Input Current
2 μA/PPM at 20 °C
* Scales
0/2.000 PPM - 0/20.00 PPM
(Cl2, ClO2, D.O3)
Zero adjustment: ± 0.3 μA
Cell sensitivity: 12.5/250 %
* Polarization: -200 mV (0/-1250 mV)
* Temperature coefficient: 0/4.0 %/°C
* Filter software 90%RT: 0.4/20.0 s for small/large variations
Temperature
Input: Pt100 3 wires
Measuring and compensation range: -2/52 °C
Resolution: 0.1 °C
Zero adjustment: ± 1 °C
Set-point A and B
* Selectable action: ON/OFF - PFM – PWM
PFM/PWM action
Proportional band: 0/10 % of the scale
Pulse frequency: 0/120 pulse/min
Pulse width: 0/99.9 s
Option 091.3711
Dual analog output
The user may select the temperature output
Option 091.4143
9/36 VDC power supply