Film Coating Three Electrode Total Chlorine Sensor For Seawater And Ballast Water

Item Number

  CP4.0

Total chlorine (= free chlorine + bound chlorine)

Reduced dependence on pH

  Swimming pool water, drinking water, sea water, brine (15% NaCl)     

  Surfactants (tensides) are partially tolerated.

inorganic chlorine compounds:

NaOCl (=sodium hypochlorite), Ca(OCl)2 , chlorine gas, electrolytically generated chlorine

Electronic

Analog version: - voltage output

- not galvanically isolated electronics

- analog internal data processing

- output signal: analog (analog-out/analog)

Digital version: - electronic is completely galvanically isolated

- digital internal data processing

- output signal: analog (analog-out/digital)

or

digital (digital-out/digital)

mA-version: - current output analog

- not galvanically isolated electronics

- output signal: analog (analog-out/analog)

Information about themeasuring range

The actual slope of a sensor can vary production-related between 65% and 150% of the nominal slope

Note: With a slope > 100% the measuring range is reduced accordingly.

(Ex.: 150% slope → 67% of the specified measuring range)

Accuracy

after calibration at repeatability

  conditions (25°C, pH 7.2 in       drinking water) of the upper full   scale

Slope drift

At repeatability conditions (25 °C, pH 7,2 in drinking water)

Working temperature

Measuring water temperature: 0 … +45 °C

(no ice crystals in the measuring water)

Automatically, by an integrated temperature sensor

Sudden temperature changes must be avoided

Max. allowed working

pressure

Operation without retaining ring:

- 0.5 bar

- no pressure impulses and/or vibrations

Operation with retaining ring in TARAflow FLC:

- 3 bar,

- no pressure impulses and/or vibrations (see option 2)

Flow rate

(Incoming flow velocity)

approx. 15-30 l/h (33 – 66 cm/s) in FLC, small flow rate dependence is given

pH 4 – pH 12, reduced dependence on pH-value

(see diagram last page of the data sheet “Slope of  CP4 versus pH”)

At the device, by analytical determination, DPD-4-Method

(DPD- 1 + DPD-3)

Cross sensitivities/

interferences

ClO2 : factor 1

O3: factor 1.3

Corrosion inhibitors can lead to measuring errors.

Stabilisers for water hardness can lead to measuring errors.

Connection

mV version:                          5-pole M12, plug-on flange

Modbus version:                   5-pole M12, plug-on flange

4-20 mA version:                   2-pole terminal

or

5-pole M12, plug-on flange

> 30 m are permissible

Maximum cable length depends on application

5-pole M12 plug-on flange: IP68

2-pole terminal with mA-hood: IP65

Size

diameter:                               approx. 25 mm

Length: mV version                  approx. 190 mm (analog signal processing)

                                            approx.. 205 mm (digital signal processing)           

             Modbus version              approx. 205 mm

             4-20 mA version             approx. 220 mm (2-pole-terminal)

                                             approx. 190 mm (5-pole-M12)

storage

Sensor: dry and without electrolyte no limit at

+5 … +40 °C

Electrolyte: in original bottle protected from sunlight at +5 … +35 °C min.

1 year or until the specified EXP-Date

Membrane cap: in original packing no limit at +5 … +40 °C

(used membrane caps can not be stored)

maintenance

Regularly control of the measuring signal, min. once a week

The following specifications depend on the water quality:

Change of the membrane cap: once a year

Change of the electrolyte: once a year

EMC tested

RoHS compliant

Option 1:

Membrane cap M48.4S

especially for applications in sea water or brine

Option 2:

Retaining ring

- When operating with pressures >0.5 bar in TARAflow FLC

- Dimensions retaining ring 29 x 23.4 x 2.5 mm, slitted, PETP

- Different positions for groove selectable

(on request)

All CP4.0

M48.4E

Art. No. 11051-E

ECP1.4/GEL, 100 ml Art. No. 11006.1

S1

Art. No. 11908

14 x 1.8 NBR Art. No. 11806

For sea water or brine

applications:

M48.4S

Art. No. 11051-S

Measuring

range

in ppm

Resolution

in ppm

Output

Output resistance

Modbus RTU

There are no terminating resistors in the sensor.

9-30 VDC

approx. 20-56 mA

5-pole M12 plug-on flange

Function of wires:

PIN1: reserved

PIN2: +U

PIN3: power GND

PIN4: RS485B

PIN5: RS485A

Measuring

range

in ppm

Resolution

in ppm

Output

Output resistance

Nominal slope

(at pH 7.2)

in mA/ppm

Power

supply

4…20 mA

uncalibrated

12…30 VDC

RL 50Ω…RL 900Ω

2-pole terminal (2 x 1 mm²)

Recommended: Round cable

4 mm

2 x 0.34 mm²

Measuring

range

in ppm

Resolution

in ppm

Output

Output resistance

Nominal

slope

(at pH 7.2)

in mA/ppm

Power

supply

4…20 mA

uncalibrated

12…30 VDC

RL 50Ω…RL 900Ω

5-pole M12 plug- on flange

Function of wires: PIN1: n. c.

PIN2: +U

PIN3: -U

PIN4: n c.

PIN5: n. c.