Emerson Ozone Sensor 499A Oz Instruction Sheet

Emerson Ozone Sensor 499A OZ Liq_Manual_51A-499aOZ

: Emerson Emerson-Ozone-Sensor-499A-Oz-Instruction-Sheet-165166 emerson-ozone-sensor-499a-oz-instruction-sheet-165166 emerson pdf

Open the PDF directly: View PDF .
Page Count: 8

Model 499A OZ

Ozone Sensor

Instruction Sheet

PN 51A-499AOZ/rev.H

September 2010

SPECIFICATIONS - SENSOR

Pressure: 0 to 65 psig (101 to 549 kPa abs)

Temperature: 32 to 122°F (0 to 50°C)

Process Connection: 1 inch MNPT

Wetted Parts: Polysulfone, Viton1, Teflon2TFE, silicone

Cathode: gold

Type PN Wetted Materials Process Connection Maximum Temperature Maximum Pressure

1-1/2 in. tee 23567-00 CPVC, Buna N 1-1/2 in. socket 122°F (50°C) 65 psig (549 kPa abs)

915240-03 3/4 in. NFPT

2 in. tee 915240-04 PVC, Buna N 1 in. NFPT 120°F (49°C) 60 psig (515 kPa abs)

915240-05 1-1/2 in. NFPT

Low Flow* 24091-00 Polyester/polycarbonate, Compression fitting for 158°F (70°C) 90 psig (722 kPa abs)

316SS, silicone 1/4 in. OD tubing

1Viton is a registered trademark of E.I. duPont de Nemours & Co.

2Teflon is a registered trademark of E.I. duPont de Nemours & Co.

SPECIFICATIONS - FLOW CELLS

For additional information, please visit our website

at www.emersonprocess.com/raihome/liquid/.

* Pressure and temperature specifications for the low flow cell exceed the temperature and pressure specifications for the sensor.

CAUTION

Do not exceed pressure and temperature specifications.

Pressure: 65 psig max (549 kPa abs max)

Temperature: 32 to 122°F (0 to 50°C)

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.

2

MODEL 499A OZ INSTALLATION

INSTALLATION

FIGURE 1. Sensor Orientation FIGURE 2. Flow-Through 2 in. Tee

FIGURE 3. Flow-Through 1-1/2 in. Tee

Flow through 1 to 5 gpm (3.8 to 19 L/min)

Open channel 1 ft/sec (0.3 m/sec)

Low flow cell 2 to 5 gph (7.6 to 19 L/hr)

The Model 499AOZ sensor is NOT recommended for

submersion into tanks, basins, or ponds.

FIGURE 4. Low Flow Cell (PN 24091-00)

Install the sensor in a flowing sample. Keep the sample

flow as constant as possible at a value within the limits

below.

MODEL 499A OZ WIRING

WIRING

3

FIGURE 5. Wiring Sensor with Standard Cable to

Model 54eA Analyzer

FIGURE 6. Wiring Sensor with OptimumEMI/RFI or

Variopol Cable to Model 54eA Analyzer

FIGURE 7. Wiring Sensor with Standard Cable to

Model 1056 and Model 56 Analyzer

FIGURE 8. Wiring Sensor with Optimum EMI/RFI or

Variopol Cable to Model 1056 and Model 56 Analyzer

FIGURE 9. Wiring Sensor with Standard Cable to

5081-A Transmitter.

FIGURE 10. Wiring Sensor with Optimum EMI/RFI or

Variopol Cable to 5081-A Transmitter.

MODEL 499A OZ WIRING

FIGURE 12. Wiring Sensor with Optimum EMI/RFI or

Variopol Cable to Xmt-A Transmitter.

FIGURE 11. Wiring Sensor with Standard Cable to

Xmt-A Transmitter.

4

FIGURE 13. Wiring Sensor with Standard Cable to

Model 1066 Transmitter.

FIGURE 14. Wiring Sensor with Optimum EMI/RFI

or Variopol Cable to Model 1066 Transmitter.

CALIBRATION

Zero point: Even in the absence of ozone, the 499AOZ

sensor generates a small signal called the zero current.

Failing to correct for the zero current can introduce a

bias, particularly if the ozone concentration is small

(<0.4 ppm). Zero the sensor when it is first placed in

service and every time the fill solution is changed. To

zero the sensor, place it in a cup of deionized or bottled

water. Once the sensor current has reached a stable low

value, which takes at least two hours, follow the analyz-

er prompts for zeroing the sensor. The zero current

should be between -10 and 10 nA. For more information

refer to the analyzer manual.

Full Scale: Because stable dilute ozone standards are

not available, the sensor must be calibrated against the

results of a laboratory test run on a grab sample of the

process liquid. Place the sensor in the flow cell and

adjust the sample flow to the correct range. Also, adjust

the concentration so that it is near the upper end of the

operating range. Once readings are stable, follow the

analyzer prompts to complete the calibration. Be sure

taking the sample does not alter flow to the sensor,

and test the sample immediately after collection. After

calibration, go to the diagnostics menu and check the

sensitivity. It should be between 250 and 450 nA/ppm.

For more information, refer to the analyzer manual.

MODEL 499A OZ WIRING

5

When making connections through a junction box

(PN 23550-00), wire point-to-point.

NOTE:

Use a wire nut and pigtail (included) when

connecting several wires to the same terminal.

FIGURE 15. Pin Out Diagram for Model 499AOZ-VP

Sensor (top view of connector end of sensor)

MAINTENANCE

CLEANING THE MEMBRANE.

Keep the membrane clean and free from dirt. Clean the

membrane with water sprayed from a wash bottle. Use

a soft tissue to gently wipe the membrane.

REPLACING THE ELECTROLYTE SOLUTION AND

MEMBRANE.

1. Unscrew the membrane retainer and remove the

membrane assembly and O-ring. See Figure 16.

2. Hold the sensor over a container with the cathode

pointing down.

3. Remove the fill plug and allow the electrolyte solu-

tion to drain out.

4. Inspect the cathode. If it is tarnished, clean it by

gently rubbing in the direction of the existing

scratches (do not use a circular motion) with 400-

600 grit silicon carbide finishing paper. Rinse the

cathode thoroughly with water.

5. Wrap the plug with one or two turns of pipe tape

and set aside. Remove old tape first.

6. Prepare a new membrane. Hold the membrane

assembly with the cup formed by the membrane

and membrane holder pointing up. Fill the cup with

electrolyte solution. Leave the membrane assem-

bly filled with electrolyte solution and set it aside.

7. Hold the sensor at about a 45-degree angle with the

cathode end pointing up. Add electrolyte solution

through the fill hole until the liquid overflows. Tap the

sensor near the threads to release trapped air bub-

bles. Add more electrolyte solution if necessary.

8. Place the fill plug in the electrolyte port and begin

screwing it in. After several threads have engaged,

rotate the sensor so that the cathode is pointing up

and continue tightening the fill plug. Do not over-

tighten.

9. Place a new O-ring in the groove around the cathode

post. Cover the holes at the base of the cathode

stem with several drops of electrolyte solution.

10. Insert a small blunt probe, like a toothpick with the

end cut off, through the pressure equalizing port.

See Figure 16.

NOTE

Do not use a sharp probe. It will puncture

the bladder and destroy the sensor.

Gently press the probe against the bladder several

times to force liquid through the holes at the base

of the cathode stem. Keep pressing the bladder

until no air bubbles can be seen leaving the holes.

Be sure the holes remain covered with electrolyte

solution.

11. Place a drop of electrolyte solution on the cathode,

then place the membrane assembly over the cath-

ode. Screw the membrane retainer in place.

12. The sensor may require several hours operating at

the polarizing voltage to equilibrate after the elec-

trolyte solution has been replenished.

6

MODEL 499A OZ MAINTENANCE

Periodic maintenance and cleaning is required for best performance of the sensor. Generally, the membrane and

fill solution should be replaced every four to six months. Sensors installed in harsh or dirty environments require

more frequent maintenance. The optimum maintenance frequency is best determined by experience.

WARNING

Before removing the sensor from the process

stream for maintenance, be sure the process

pressure is reduced to 0 psig and the process

temperature is at a safe level.

Fill solution may cause irritation. May be harmful if

swallowed. Read and follow manual.

CAUTION

33523-02 Electrolyte Fill Plug

9550094 O-Ring, Viton 2-014

33521-02 Membrane Retainer

23501-11 Ozone Membrane Assembly: includes one membrane assembly and one O-ring

23502-11 Ozone Membrane Kit: includes 3 membrane assemblies and 3 O-rings

9210299 #3 Ozone Sensor Fill Solution, 4 oz (120 mL)

SPARE PARTS

FIGURE 16. Sensor Parts

MODEL 499A OZ MAINTENANCE

7

MODEL 499A OZ ORDERING INFORMATION

Credit Cards for U.S. Purchases Only.

The right people,

the right answers,

right now. ON-LINE ORDERING NOW AVAILABLE ON OUR WEB SITE

http://www.raihome.com

Specifications subject to change without notice.

8

Emerson Process Management

2400 Barranca Parkway

Irvine, CA 92606 USA

Tel: (949) 757-8500

Fax: (949) 474-7250

http://www.raihome.com

© Rosemount Analytical Inc. 2010