Italy B&C Online Residual Chlorine Monitor CL7685

CL7685 is a microcomputer based online measuring and controlling instrument for residual chlorine and chlorine dioxide. It adopts advanced non membrane constant voltage sensors, which do not require the replacement of membranes and chemicals. It has high sensitivity, rapid signal response, accurate measurement, stable performance, and simple maintenance. It has good performance under residual chlorine conditions below 0.1ppm at the end of urban tap water pipelines.

CL7685 residual chlorine controller? Standard configuration:

1. One CL7685 monitoring device

2. SZ283 sensor (with 3-meter silver cable) one

3. SZ7231 (SZ7233) constant current component set

The constant current component includes: A、 One single hole seat constant current device SZ7231 or one three hole seat constant current device SZ7233 (according to user ordering requirements)

B. 4 x 6mm inlet hose, 2 meters long

C. 1/4 "threaded inlet pipe joint

D. Two mounting bolts (with a diameter of 5mm) for the constant current device

CL7685 residual chlorine controller? Instrument functions

Instrument type: intelligent instrument

Using electrodes: SZ283 constant voltage electrode, three wire Pt100 temperature electrode

Measurement range: 0-2 0-20ppm two levels switchable

Calibration mode: Online calibration, switchable between immediate and delayed modes

Display setting parameters

Automatic or manual temperature compensation

Output signal: One isolated 0/4-20mA output, editable and positive/negative ratio

Operation modes: automatic control, single measurement, and simulation are available for selection

Control function: High and low two-point on/off, pulse proportional (PFM) control mode optional, with hysteresis and delay functions

Alarm function: timed alarm at high and low points, with delay function

Automatic overload protection and reset function

Pull out terminal block

Power Supply: 220V 110V/50 60Hz

Instrument installation: panel mounted

External dimensions: 96X96X155mm

Technical parameters

Input current: At 20 ℃, 2 μ A corresponds to 1ppm

Zero point current: ± 2 μ A

Polarization voltage:- 200mV

Sensitivity: 12.5/250%

resolving power: 0.01ppm

Temperature coefficient: 0/4.0%/ ℃

Response time: 0.6-99.9 seconds

Measurement range: 0~2.000ppm or 0~20.00ppm (residual chlorine, ozone, chlorine dioxide)

Temperature input: Three wire Pt100 temperature sensor

Compensation scope:- 2~52 ℃

resolving power: 0.1 ℃

Zero point adjustment: ± 1 ℃

PFM function ratio range: 0-10% of the range

Pulse frequency: 0-120 times/second

Pulse cycle: 0-99.9 seconds

Optional function: Optional second isolation 0/4-20mA output RS232, RS485 serial port and other functions

Maintenance of

The reliability of the system depends on the reliability of the sensors. In addition to adjusting the conditions, the cleanliness of the sensor surface during maintenance can affect the accuracy of measurements. Therefore, it is equally important to regularly check whether the sensor surface is clean. If the sensor surface is dirty, it is recommended to perform the following cleaning operations:

Remove the sensor from the constant current device

Immerse the platinum ring of the sensor in a 5% HCl solution for 30 seconds

Remove the sensor and rinse it clean with tap water

Install the sensor back into the constant current device

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