B&C CL 7901 Instruction Manual

Free/combined chlorine, dissolved ozone

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CL 7901

Free

Chlorine

Option

REP N°

Cod. 280067611 – Rev B

B&C Electronics Srl - Via per Villanova 3 - 20866 Carnate (MB) - Italy - P.IVA 00729030965

Tel +39 039 63 1721 - Fax +39 039 607 6099 – info@bc-electronics.it - www.bc-electronics.it

INSTRUCTION MANUAL

CL 7902

Combined

Chlorine

U N I E N I S O 9 0 0 1

C E R T . N . 9 1 1 5 B C E L

OZ 7901

Dissolved

Ozone

BC3531-A - Rev.01

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Summary of Contents for B&C CL 7901

Page 1 U N I E N I S O 9 0 0 1 C E R T . N . 9 1 1 5 B C E L INSTRUCTION MANUAL CL 7901 CL 7902 OZ 7901 Free Combined Dissolved Chlorine Chlorine...
Page 3: Table Of Contents
CL 7901 – CL 7902 – OZ 7901 B&C Electronics Index DESCRIPTION ..........................2 Accessories and spares ......................2 TECHNICAL SPECIFICATIONS ....................3 Sensor ..........................3 Flowcell assembly ....................... 3 OPERATING INSTRUCTION ....................3 Packing list and spares ......................3 Installation ...........................
Page 4: Description
The concentration and temperature values are displayed on a backlit liquid crystal display on the front of the instrument CL 7585.010 or CL 7685.001. The model CL 7901 is suitable for free chlorine measuring in drinking water plants, cooling towers, reverse osmosis, de-chlorination. It requires – 200 mV polarization voltage.
Page 5: Technical Specifications
-5° to +55° C. Connection: Watertight 6 pin plug Materials: Noryl and titanium (nut) Polarization: - 200 mV for CL 7901 and OZ 7901 - 400 mV for CL 7902 2.2 FLOWCELL ASSEMBLY Type: Constant head overflow system Materials: Clear Cast Acrylic...
Page 6: Installation
CL 7901 – CL 7902 – OZ 7901 B&C Electronics OZ 7901 contents: - 0012.000042 dissolved ozone sensor - 0012.030029 cable l=7mt. - 0012.000043 flow cell - 0012.090008 120 cc electrolyte bottle - 0012.050002 kit 10 membranes - 0012.050004 kit screws and OR (installed in the cell)
Page 7: Connection To The Cl 7685.010 Controller
CL 7901 – CL 7902 – OZ 7901 B&C Electronics 6. Slowly screw the chamber onto the sensor body. A small amount of electrolyte will run out of the hole from which the fill screw was removed. Place a paper towel around the sensor to absorb the electrolyte overflow.
Page 8: Operation
CL 7901 – CL 7902 – OZ 7901 B&C Electronics 4 OPERATION The monitor should be calibrated while operating on a chlorinated/ozonated sample stream. Place the system into operation as follows: 1. Place the previously zeroed sensor into the sensor chamber of the flowcell assembly.
Page 9: Maintenance
CL 7901 – CL 7902 – OZ 7901 B&C Electronics A sample should be collected from the inlet line feeding the flow cell and quickly analyzed for chlorine or d.ozone contents. When calibrating, it is best to have a reasonably high concentration of chlorine/d.ozone in the system.
Page 10: Flowcell Maintenance
CL 7901 – CL 7902 – OZ 7901 B&C Electronics Even if no build up is apparent on the membrane, it should be changed on a regular schedule. The recommended membrane change interval is every 3 months. For high purity water applications, this can probably be extended if desired, but a more frequent changing interval is a small price to pay for avoiding membrane failure at the wrong time.
Page 11 CL 7901 – CL 7902 – OZ 7901 B&C Electronics Typical installation FLOW CELL Flowcell and sensor Fixing plate Sample inlet Sample discharge Grab sample Zeroing water Manual tap Fig. 1 Instruction Manual - Rev. B – 10/18...
Page 12 CL 7901 – CL 7902 – OZ 7901 B&C Electronics Sensor Connector Body Full screw Sensing element Electrolyte chamber Membrane Front nut Fig. 2 Instruction Manual - Rev. B – 10/18...
Page 13: Warranty
CL 7901 – CL 7902 – OZ 7901 B&C Electronics WARRANTY CERTIFICATE 1) Your product is covered by B&C Electronics Warranty for 5 years from the date of shipment. In order for this Warranty to be valid, the Manufacturer must determine that the instrument failed due to defective materials or workmanship.
Page 14: Technical Support
CL 7901 – CL 7902 – OZ 7901 B&C Electronics TECHNICAL SUPPORT Data sheet In case of damage, we suggest You to contact our Technical Support by email or phone. If it is necessary for the instrument to be repaired, we recommend to photocopy and fill out this data sheet to be sent along with the inst rument, so to help us identifying the problem and therefore accelerate the repairing process.

This manual is also suitable for:

Cl 7902 Oz 7901