Rosemount Manual: 498CL pH-independent Free Chlorine Sensor Abridged | Rosemount Manuals & Guides

Model 498 CL-01

pH-independent Free Chlorine Sensor

Instruction Sheet

PN 51A-498CL01/rev.C
June 2013

SPECIFICATIONS - SENSOR

Pressure: Sensor must be installed in a flow cell

that drains to open atmosphere.

Temperature: 0-122ºF (0-50ºC)
Process connection: Sensor is intended for use in

flow cell, PN 24091-01 only.

Wetted materials: PVC, polyethersulfone, poly-

ester, Viton1, silicone, copper

Cathode: gold mesh

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Viton is a registered trademark of DuPont Performance

Elastomers.

SPECIFICATIONS - FLOW CELL

Inlet pressure: 65 psig (549 kPa abs) maximum

Temperature: 122ºF (50ºC) maximum

Process connection: Compression fitting for

1/4 inch OD tubing

Wetted materials: polycarbonate, polyester,

silicone, 316 stainless steel

CAUTION

SENSOR/PROCESS APPLICATION

COMPATIBILITY

The wetted sensor materials may not be com­patible with process com position and operating
conditions. Application compat ibility is entirely
the responsibility of the user.

For additional information, please refer to the Instruction Manuals CD shipped with this
product, or visit our website at www.emersonprocess.com/raihome/liquid/.

INSTALLATION

The sensor leaves the factory with a shipping
membrane in place. DO NOT REMOVE THE
SHIPPING MEMBRANE UNTIL READY TO PUT
THE SENSOR IN SERVICE.

FIGURE 1. Installation.

The plastic adapter shipped with the flow cell is

not used.

outlet

inlet

1. Remove the red protective cap from the sensor.

2. Holding the membrane end pointing up (cable end point­ing down), unscrew the retainer cap and remove the ship­ping membrane. See Figure 6. It is not necessary to
remove the O-ring. Save the shipping membrane. It
should be reinstalled when the sensor is not in use.

3. Still holding the membrane end pointing up, install the
chlorine membrane. The chlorine membrane is in the
plastic bag attached to the sensor. Screw the retainer
back in place.

4. Place the sensor in the flow cell and start the flow. Do

not store or operate the sensor for more than about
45 minutes in a non-flowing sample. Sensor must

drain to open atmosphere. No back pressure. Do not
leave the sensor in air.

Keep sample flow constant and between 1 and 2 gph
(60-120 mL/min).

MAINTENANCE

MODEL 498 CL-01 WIRING

WIRING

FIGURE 3. Wiring Sensor to Model 1055 Analyzer

(wall/pipe mount version)

FIGURE 2. Wiring Sensor to Model 1055 Analyzer

(panel mount version)

FIGURE 4. Wiring Sensor to Model 54eA Analyzer

FIGURE 5. Pin Out Diagram for Model 498CL-01-VP

Sensor (top view of connector end of sensor)

The sensor requires routine maintenance, which includes cleaning the membrane as well as periodically replac­ing the membrane and fill slurry. The fill slurry and membrane should be replaced at approximately three-month
intervals. The frequency of cleaning can be determined only by experience.

CLEANING THE MEMBRANE

Keep the membrane clean and free from dirt and algae. Clean the membrane with water sprayed from a wash bot­tle. Do not use tissues to clean the membrane. Touching the membrane may bend the mesh cathode and

permanently damage the sensor.

REPLACING THE ELECTROLYTE SLURRY AND MEMBRANE

1. Unscrew the membrane retainer and remove the membrane assembly and O-ring. See Figure 6.

2. Remove the fill plug.

CAUTION:

Fill solution and solid may cause irritation.
Avoid contact with skin and eyes. May be harm­ful if swallowed. Read and follow manual.

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