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Last updateMon, 15 Sep 2014 5am

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

 

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