HACH LANGE 9185sc, 9187sc, 9184sc User Manual

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DOC023.52.00051

9184sc Chlorine

9185sc Ozone and

9187sc Chlorine Dioxide Analyzer

USER MANUAL

02/2013 Edition 2A

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Table of Contents

Section 1 Specifications ......................................................................................................................................... 3

Section 2 General Information ...............................................................................................................................5

2.1 Safety Information ...............................................................................................................................................5

2.1.1 Use of Hazard Information ......................................................................................................................... 5

2.1.2 Precautionary Labels ................................................................................................................................. 5

2.2 General Sensor Information ................................................................................................................................ 6

2.3 Theory of Operation............................................................................................................................................. 6

Section 3 Installation............................................................................................................................................... 9

3.1 Mounting the Analyzer.........................................................................................................................................9

3.1.1 Environmental Considerations ................................................................................................................... 9

3.1.2 General Installation Considerations .........................................................................................................10

3.2 Choosing the Sample Line Location..................................................................................................................10

3.3 Connecting the Sample Stream.........................................................................................................................10

3.4 Connecting the Waste Stream........................................................................................................................... 11

3.5 Assembling and Placing the Probe.................................................................................................................... 11

3.5.1 Probe Assembly....................................................................................................................................... 11

3.5.1.1 Placing the Probe Into the Flow Thru Assembly............................................................................. 13

3.5.1.2 Using the Optional pH (9184sc TFC only)......................................................................................15

3.6 Connecting the Sensor with the sc Controller ...................................................................................................15

3.6.1 Attaching a sc Sensor with a Quick-connect Fitting .................................................................................15

3.7 Instrument and Controller Startup...................................................................................................................... 16

Section 4 Operation...............................................................................................................................................19

4.1 Using the sc Controller ......................................................................................................................................19

4.2 Sensor Data Logging.........................................................................................................................................19

4.3 Sensor Setup..................................................................................................................................................... 19

4.3.1 Changing the Sensor Name and Parameter Selection ............................................................................19

4.4 Sensor Diagnostics Menu.................................................................................................................................. 20

4.5 Sensor Setup Menu........................................................................................................................................... 20

4.6 Calibration ......................................................................................................................................................... 21

4.6.1 Temperature Sensor Calibration .............................................................................................................. 21

4.6.1.1 Adjusting the Temperature ............................................................................................................. 22

4.6.2 pH (9184sc T.F.C. or 9184sc Chlorine + Acid only) ................................................................................. 22

4.6.2.1 Process pH 1 Point Sample............................................................................................................22

4.6.2.2 Process pH 2 Point Sample............................................................................................................23

4.6.3 Concentration Calibration ........................................................................................................................23

4.6.3.1 Process Calibration ........................................................................................................................ 24

4.6.4 Zero Calibration .......................................................................................................................................24

4.6.4.1 Chemical Zero Calibration ..............................................................................................................25

4.6.5 Calibration Configuration .........................................................................................................................25

4.7 Set Calibration Defaults .................................................................................................................................... 25

Section 5 Maintenance ..........................................................................................................................................27

5.1 Maintenance Schedule ......................................................................................................................................27

5.2 Scheduled Maintenance....................................................................................................................................27

5.2.1 Replacing the Membrane......................................................................................................................... 27

5.2.2 Replacing the Tubing ............................................................................................................................... 28

5.2.3 Replacing the Electrolyte .........................................................................................................................28

5.2.4 Replacing the pH Electrode (9184sc only)...............................................................................................28

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Table of Contents

Section 6 Troubleshooting ................................................................................................................................... 29

6.1 Error Messages................................................................................................................................................. 29

6.2 Warning Messages ........................................................................................................................................... 29

Section 7 Replacement Parts and Accessories ................................................................................................. 31

7.1 Replacement Parts, Sensor Only...................................................................................................................... 31

7.2 Replacement Parts............................................................................................................................................ 31

7.3 Optional Accessories ........................................................................................................................................ 31

7.4 Extension Cables .............................................................................................................................................. 32

Section 8 Contact.................................................................................................................................................. 33

Section 9 Warranty, liability and complaints ...................................................................................................... 35

Appendix A 9184sc Theory of Operation............................................................................................................ 37

A.1 Theory of Operation ................................................................................................................................... 37

A.1.1 Principle of Operation ....................................................................................................................... 37

Appendix B 9185sc Theory of Operation............................................................................................................ 39

B.1 Theory of Operation ................................................................................................................................... 39

B.1.1 Principle of Operation ....................................................................................................................... 39

Appendix C 9187sc Theory of Operation............................................................................................................ 41

C.1 Theory of Operation ................................................................................................................................... 41

C.1.1 Principle of Operation ....................................................................................................................... 41

Appendix D Modbus Register Information ......................................................................................................... 43

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Section 1 Specifications

Specifications are subject to change without notice

General

Mounting Flat, vertical surface such as a wall, panel, stand, etc. Analyzer Dimensions 10.63 x 9.84 in. (270 x 250 mm) Analyzer Weight 6.5 kg (14.3 lb) Materials Electrode: gold cathode/silver anode; probe body: PVC; measuring cell: acrylic

Sample Requirements

Sample Flow Rate to Analyzer Flow rate should allow for 14 L/hr minimum Minimum Inlet Pressure to

Instrument Minimum Flow Rate 14 L/hr auto-regulated by flow thru cell Pressure Range 0.1–2 bar (1.4–28 psi) influent; flow cell pressure will be the atmospheric pressure Sample Temperature Range +2–45 °C (35.6–113 °F) Temperature Compensation Automatic over the sample Temperature Range Sample pH 4 to 8 (acidification unit available for >8 pH) Sample Inlet Tubing: at

instrument Drain Fitting ½ in. ID (supplied) Application Sample Clean water

0.1–2 bar (1.4–28 psi)

¼ in. OD

Electrical

Power Consumption 12 V, 1.5 Watts provided by sc controller

Performance

9184sc 9185sc 9187sc

Measurement Range 0–20 ppm (0–20 mg/L) HOCl 0–2 ppm (0–2 mg/L) O Detection Limit 5 ppb (0.005 mg/L) HOCl 5 ppb (0.005 mg/L) O

Accuracy

Standard Deviation 0.7 % 1.0 % 1.5 %

Interference

Repeatability ±10 ppb (0.01 mg/L) or ±5 %, whichever is greater at a pH < 7.5 Response Time 90 % < T=90 seconds Measurement Interval Continuous Measurement Technology Amperometric/Membrane (electrode, membrane, electrolyte)

Calibration

Calibration Interval 2 months for typical application

Maintenance

Maintenance Interval, Measurement Cell

Maintenance Interval, pH 1 to 1.5 years for typical operation

2 % or ±10 ppb HOCl, whichever is greater

No interference from chloramines.

Ozone and chlorine dioxide interfere with measurement.

Electrical zero or chemical zero with dechlorinated or deozoned water; calibration of the slope by comparison with a laboratory instrument; pH calibration (9184sc only) with Single or Two Point using standards or comparison with lab method with the process sample.

6 months for the membrane and electrolyte for typical operation (3 to 12 month range)

3 % or ±10 ppb O3, whichever is greater

No interference from chlorine, chloramines, hydrogen peroxide, bromine, or chlorine dioxide.

0–2 ppm (0–2 mg/L) ClO 10 ppb (0.01 mg/L) ClO 5 % or ±10 ppb ClO2,

whichever is greater

None

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Specifications

Environmental (sc Analyzer)

Enclosure IP66/NEMA 4X Storage Temperature Range –20 to 60 °C (–4 to 140 °F) Operating Temperature Range 0 to 45 °C (32 to 113 °F) Relative Humidity 10 to 90% non-condensing Operating Humidity 0 to 90% non-condensing

Compliance

The sc analyzer and sensor combination are: CE marked and declared by HACH LANGE to the applicable EU Safety and EMC Directives.

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Section 2 General Information

2.1 Safety Information

Please read this entire manual before unpacking, setting up, or operating this equipment. Pay attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment.

To ensure that the protection provided by this equipment is not impaired, do not use or install this equipment in any manner other than that specified in this

2.1.1 Use of Hazard Information

manual.

DANGER Indicates a potentially or imminently hazardous situation which, if not av oided, could result in death or serious injury.

CAUTION Indicates a potentially hazardous situation that may result in minor or moderate injury.

Important Note: Information that requires special emphasis.

Note: Information that supplements points in the main text.

2.1.2 Precautionary Labels

Read all labels and tags attached to the instrument. Personal injury or damage to the instrument could occur if not

This symbol, if noted on the instrument, references the instruction manual for operation and/or

safety information.

Electrical equipment marked with this symbol may not be disposed of in European public disposal systems after 12 August of 2005. In conformity with European local and national regulations, European electrical equipment users must now return old or end-of life equipment to the Producer for disposal at no charge to the user.

Note: For all electrical products (marked or unmarked) which are sup plied or produced by Hach-Lange, please contact the local Hach-Lange sales office for instructions for proper disposal.

observed

This symbol, when noted on a product enclosure or barrier, indicates that a risk of electrical shock and/or electrocution exists.

This symbol, when noted on the product, identifies the location of a fuse or current limiting device.

This symbol, when noted on the product, indicates that the marked item can be hot and should not be touched without care.

This symbol, when noted on the product, indicates the presence of devices sensitive to Electro-Static Discharge and indicates that care must be taken to prevent damage to them.

This symbol, when noted on the product, identifies a risk of chemical harm and indicates that only individuals qualified and trained to work with chemicals should handle chemicals or perform maintenance on chemical delivery systems associated with the equipment.

This symbol, if noted on the product, indicates the need for protective eye wear.

This symbol, when noted on the product, identifies the location of the connection for Protective Earth (ground).

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General Information

2.2 General Sensor Information

The system consists of a controller with an integrated display, and a sensor (Figure 2). The choice can be made to use this instrument with the specifications and processes of the 9184sc, 9185sc, or 9187sc sensor. This is determined by selecting the parameter during the initial sensor setup and the type of sensor being used. See

on page 19.

2.3 Theory of Operation

Refer to the following Appendices.

• Appendix A 9184sc Theory of Operation on page 37

• Appendix B 9185sc Theory of Operation on page 39

• Appendix C 9187sc Theory of Operation on page 41

Figure 1 Sensor Cell Operation*

4.3 Sensor Setup

1. Membrane 7. Electrolyte

2. Membrane Holder 8. Probe Body

3. Anode 9. Cathode

4. Electrolyte Filling Plug

5. Electrolyte Filling Hole 11. Sample

6. Assembled Electrode

A small hole exists in the plug to allow the instrument to maintain a consistent pressure regardless of changes in atmospheric

pressure.

*See Replacement Parts and Accessories on page 31.

10. Membrane/Interface Sample

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Figure 2 General Instrument Schematic**

General Information

1. pH Probe (9184sc only) 5. Gateway (behind Mounting Plate)

2. pH Cell Cap (9184sc only) 6. Connector

3. Connector 7. Cell Cap

4. Cable to Controller 8. Probe Body

**See Replacement Parts and Accessories on page 31.

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General Information

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Section 3 Installation

DANGER Only qualified personnel should conduct the tasks described in this section of the manual.

3.1 Mounting the Analyzer

The analyzer is designed to be mounted on a flat, vertical surface such as a wall, panel, stand, etc. The instrument must be level.

Locate the sensor as close to the sampling point as possible. The shorter the distance traveled by the sample, the faster the instrument can respond and indicate changes in sample concentration. The 152 mm (6-inch) clearance at the bottom of the instrument is not necessary if using the accessories. Refer to connection instructions.

Figure 3 Analyzer Dimensions

section 3.3 on page 10 for sample stream

Note: The optional pH probe is used for the 9184sc TFC only.

3.1.1 Environmental Considerations

The instrument enclosure is IP66/NEMA 4X with an ambient temperature between 0 and 45 °C (32 to 113 °F), see

Specifications on page 3 for more information.

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Installation

Poor

Sediment (Typical)

Air (Typical)

Poor

Good Best

3.1.2 General Installation Considerations

• Place the analyzer in an accessible location.

• Keep the sample tubing as short as possible to minimize lag time.

• Do not place the probe next to a heat source.

• Ensure that there is no air intrusion into the sample supply line.

• Sample pressure must be sufficient to ensure a continuous supply to the probe. A

minimum pressure of approximately 0.1–2 bar (1.4–28 psi) is sufficient to provide the correct flow rate. A stable flow rate of 200–250 mL/min is critical. Erratic flow rates will create erratic measurements.

3.2 Choosing the Sample Line Location

Note: Erratic readings will occur if a sample is drawn from a location that is too close to points of chemical additions to the process stream, if mixing is inadequate, or if the chemical reaction is incomplete.

Selecting a good, representative sampling point is important for optimum instrument performance ( the entire system.

Figure 4). The sample analyzed must be representative of the condition of

Install sample line taps into the side of larger process pipes to minimize the chance of ingesting sediment from the pipe line bottom or air bubbles from the top. A tap projecting into the horizontal center of the pipe is ideal.

Figure 4 Sample Line Location in the Process Stream

3.3 Connecting the Sample Stream

Sample inlet and drain connections are made on the Analyzer Flow Cell. Refer to

Specifications on page 3 for flow rates.

The sample inlet requires 6.3 mm (¼ in.) OD tubing. The connections are made with a quick connect fitting. Use the 6.3 mm (¼ in.) supplied tubing adapter in the electrode kit. Cut all tubing so the ends are squarely cut and not angled.

1. Push the tubing into the influent of the flow analyzer (Figure 5).

2. Push the supplied drain tubing onto the nipple beside the influent.

3. Ensure there are no bends in the tubing to prevent back pressure.

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3.4 Connecting the Waste Stream

Connect the waste stream using the supplied ½-inch ID tubing. Be sure the drain is free flowing (free of obstructions) so that the waste stream does not cause unnecessary back-pressure or overflow.

Note: Waste from this instrument must go to the drain.

3.5 Assembling and Placing the Probe

Refer to Figure 5 for a detailed description of the probe components.

Figure 5 Probe Components*

Installation

1. Electrode Retaining Ring

2. Measurement Electrode

3. Probe Body

4. Filling Screw

Note: A small hole exists in the plug to allow the instrument to maintain a consistent pressure regardless of changes in atmopsheric pressure.

5. Flange

6. Probe Body Washer

7. Pre-Mounted Membrane (set of four); Ensure the properly marked membrane is chosen (e.g. CL will appear on the side

for a Chlorine membrane).

3.5.1 Probe Assembly

CAUTION To familiarize yourself with handling precautions, dangers and emergency procedures, always review the Material Safety Data Sheets prior to handling containers, reservoirs, and delivery systems that contain chemical reagents and standards. Protective eye wear is always recommended when contact with chemicals is possible.

1. Screw the membrane cap onto the probe body (Figure 6 and Figure 7). Be careful not

2. Remove the filling screw from the probe body.

to touch or damage the membrane surface.

3. Visually inspect the electrolyte to ensure that there are no particles or other impurities present.

4. Using the supplied syringe, fill the probe body with ~7 mL of electrolyte.

5. Slowly insert the electrode into the probe body. Do not use force when inserting into

the probe body.

*See Replacement Parts and Accessories on page 31.

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Installation

6. Tap the side of the probe to make sure that no air bubbles are trapped in the probe

body when inserting the electrode.

7. Screw on the retaining ring. Some electrolyte may spill out the top of the body.

8. Insert the filling screw.

9. Wash hands and rinse sensor to remove excess electrolyte.

10. Place the probe into the Flow Thru Assembly.

Figure 6 Probe Assembly

1. Membrane Cap to Probe Body 4. Seat Electrode into Probe Body.

2. Syringe Filled with 5 mL Electrolyte 5. Secure Electrode with Retaining Ring.

3. Inject Electrolyte into Electrode Body. 6. Insert Filling Screw

A small hole is in the plug so the instrument can maintain consistent pressure regardless of atmospheric pressure changes.

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Figure 7 Tightening the Membrane

Installation

1. Displays the correct way to tighten the membrane. It is

snug but not overtightened.

2. Displays the incorrect way to tighten the membrane. It is too loose and the internal electrolyte could leak.

3.5.1.1 Placing the Probe Into the Flow Thru Assembly

1. Remove the probe retaining nut (Figure 8).

2. Insert the newly assembled probe into the right chamber of the flow cell.

3. Gently screw the retaining nut back on, ensuring it is snug but do not overtighten.

4. Attach the keyed electrode.

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Installation

Figure 8 Placing the Probe Into the Flow Thru Assembly**

1. Electrode Cable Connector 3. Probe Assembly

2. Probe Retaining Nut 4. Flow Thru Assembly

**See Replacement Parts and Accessories on page 31.

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3.5.1.2 Using the Optional pH (9184sc TFC only)

The optional pH (Figure 2 on page 7) is used when analysis is needed for measuring all of the free available chlorine (both HOCI and OCI–). See 4.3 Sensor Setup on page 19 for selecting this option using the controller during initial sensor parameter selection.

1. Remove the red cap from the left side of the flow cell.

2. Remove the O-ring from the white blank.

3. Gently remove the cover from the pH probe.

4. Put the O-ring from Step 2 onto the pH probe, sliding it gently over the glass end and

up the probe until it is flush against the red connection.

5. Insert the newly assembled probe into the left chamber of the flow cell.

6. Attach the keyed electrode cable.

3.6 Connecting the Sensor with the sc Controller

3.6.1 Attaching a sc Sensor with a Quick-connect Fitting

Installation

The sensor cable is supplied with a keyed quick-connect fitting for easy attachment to the controller ( sensor must be removed. Optional extension cables may be purchased to extend the sensor cable length. If the total cable length exceeds 100 m (300 ft), a termination box must be installed.

Note: Use of a load termination box other than Cat. No. 5867000 may result in a hazard.

Figure 9 Attaching the Sensor using the Quick-connect Fitting

Figure 9). Retain the connector cap to seal the connector opening in case the

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Installation

Figure 10 Quick-connect Fitting pin assignment

Number Designation Wire Color

1+12 VDC Brown 2 Circuit Common Black 3 Data (+) Blue 4 Data (–) White 5 Shield Shield (grey wire in existing quick-disconnect fitting) 6Groove

3.7 Instrument and Controller Startup

1. Ensure the flow regulator is threaded (clockwise) all the way and is snug but not

overtightened.

2. Turn on the sample stream.

3. Slowly open the flow regulator (Figure 11) counterclockwise until consistent flow is

achieved at a rate in which the flow cell can be flushed out for about two minutes. Check for leaks at this time. If leaks occur, fix by ensuring all connections are snug but not overtightened.

4. Adjust the flow regulator on the flow cell until the water begins to drain out the left drain port. This results in a constant 14 L/hour (200–250 mL/min) flow rate.

5. Supply power to the controller and it will automatically power on.

6. Allow the instrument to stabilize before proceeding. This usually takes between 2–48

hours.

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Figure 11 Setting the Flow Rate

Installation

1. Sample inlet tubing 4. Sample

2. Flow meter adjustment knob 5. Drain tubing

3. Sample level overflow (indicates the correct water level)

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Installation

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Section 4 Operation

4.1 Using the sc Controller

Before using the sensor in combination with an sc controller make yourself familiar with the operating mode of the controller. Refer to the controller user manual and learn how to use and navigate the menu functions.

4.2 Sensor Data Logging

The sc controller provides one data log and one event log for each sensor. The data log stores the measurement data at selected intervals. The event log stores a variety of events that occur on the devices such as configuration changes, alarms, warning conditions, etc. The data log and the event log can be read out in a CSV format. For downloading the logs please refer to the controller user manual.

4.3 Sensor Setup

Select the parameter during the initial sensor setup for the parameter that corresponds to the instrument that has been purchased. Parameter choices, depending on the instrument, are:

• Chlorine HOCL, does not include pH measurement

• Chlorine + Acid which is HOCL plus the acid verification accessory, does not

include pH measurement

• Total Free Chlorine (TFC), includes pH measurement

• Ozone, does not include pH measurement

• Chlorine Dioxide, does not include pH measurement

When a sensor is initially installed, the sensor name will display. To change the sensor name refer to the following instructions:

4.3.1 Changing the Sensor Name and Parameter Selection

When a sensor is initially installed, the sensor name will be displayed. To change the sensor name refer to the following instructions:

1. From the Main Menu, select SENSOR SETUP and confirm.

2. Highlight the appropriate sensor if more than one sensor is attached and confirm.

3. Select CONFIGURE and confirm.

4. Select EDIT NAME and edit the name. Confirm or cancel to return to the Sensor

Setup menu.

5. Select PARAMETER and confirm.

6. Choose the parameter the instrument purchased corresponds to and confirm.

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Operation

4.4 Sensor Diagnostics Menu

SELECT SENSOR

ERROR LIST—See section 6.1 on page 29.

WARNING LIST— See section 6.2 on page 29.

4.5 Sensor Setup Menu

SELECT SENSOR (if more than one sensor is attached)

CALIBRATE

ZERO CAL

See section 4.6.4 on page 24.

PROCEESS CONC

Use to adjust concentration which requires accurate pH; and TFC in ppb. See section 4.6.3 on page 23.

PROCESS TEMP

Use to adjust the TEMPERATURE for a °C value. See section 4.6.1.1 on page 22.

PROCESS PH (9184sc T.F.C. or 9184sc Chlorine + Acid only)

Use to adjust for a 1 or 2 Point Process pH Sample. See section 4.6.2.1 on page 22 and section 4.6.2.2 on page 23.

CAL CONFIG

Select OUTPUT MODE, CAL ZERO, or CAL DELAY. For the OUTPUT MODE, select ACTIVE, HOLD, TRANSFER, or CHOICE. For CAL ZERO, select ELECTRICAL or CHEMICAL. For CHEMICAL use a sample that does not contain any oxidants. Ensure that the sample source has a sufficient flow rate and that the sample is adequately mixed. CAL DELAY can adjust for Days. See

DEFAULT SETUP

Resets the sensor configuration to default settings. See section 4.7 on page 25.

CONFIGURE

EDIT NAME

Enter up to a 10-digit name in any combination of symbols and alpha or numeric characters.

SELECT PARAM.

Select CHLORINE HOCL, CHLORINE + ACID, T.F.C., OZONE, or CHLORINE DIOX.

CONC UNITS

Select for ppb–ppm and ug/l–mg/l

T-SENSOR

The sensor has a factory-set internal temperature. Select AUTOMATIC or MANUAL setting. The preferred setting is AUTOMATIC.

section 4.6.5 on page 25.

TEMP UNITS

Select °C or °F.

SAMPLE PH (9184sc Chlorine + Acid only)

Allows user to set the pH of the sample.

SELECT PH MEAS (9184sc T.F.C or 9184sc Chlorine + Acid only)

AUTOMATIC or MANUAL setting and pH compensation. Use the AUTOMATIC setting when using supplied pH.

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4.5 Sensor Setup Menu (continued)

DISP PH FORMAT (9184sc T.F.C or 9184sc Chlorine + Acid only)

Choose either XX.XX pH or XX.X pH.

pH MAXIMUM (9184sc T.F.C only)

Allows user to set the maximum pH allowed value. An higher value will display a PH TOO HIGH error message.

LOG SETUP

Allows user to select data logging interval for the sensor and temperature.

FILTER

Adjust for + s. This averages the signal over the specified time interval.

MAINS FREQ

Choose 50 or 60 Hz.

CONFIGURE (continued)

DEFAULT SETUP

Resets the sensor configuration to default settings.

DIAG/TEST

Operation

PROBE INFO

Displays the driver and software versions and the serial number.

CAL DATA

Displays OFFSET: °C, SLOPE: in A/mg and OFFSET: uA, SLOPE: %

SIGNALS

Displays INT, TEMP RAW, MV RAW and PH RAW.

COUNTERS

Displays sensor total time and humidity suppressor.

4.6 Calibration

4.6.1 Temperature Sensor Calibration

The probe contains a temperature sensor which is factory pre-set. If there are setting questions, the data can be validated using a high precision thermometer using and performing the steps in section 4.6.1.1 on page 22.

Table 1

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Operation

Temperature Conversion

Conversion from Celsius to Fahrenheit: °F = 1.8 x °C + 32 Conversion from Celsius to Kelvin: K = °C + 273.15

Table 1 Temperature Conversions

°C °F K °C °F K °C °F K

0 32 273.15 16 60.8 289.15 32 89.6 305.15 1 33.8 274.15 17 62.6 290.15 33 91.4 306.15 2 35.6 275.15 18 64.4 291.15 34 93.2 307.15 3 37.4 276.15 19 66.2 292.15 35 95 308.15 4 39.2 277.15 20 68 293.15 36 96.8 309.15 5 41 278.15 21 69.8 294.15 37 98.6 310.15 6 42.8 279.15 22 71.6 295.15 38 100.4 311.15 7 44.6 280.15 23 73.4 296.15 39 102.2 312.15 8 46.4 281.15 24 75.2 297.15 40 104 313.15 9 48.2 282.15 25 77 298.15 41 105.8 314.15 10 50 283.15 26 78.8 299.15 42 107.6 315.15 11 51.8 284.15 27 80.6 300.15 43 109.4 316.15 12 53.6 285.15 28 82.4 301.15 44 111.2 317.15 13 55.4 286.15 29 84.2 302.15 45 113 318.15 14 57.2 287.15 30 86 303.15 15 59 288.15 31 87.8 304.15

4.6.1.1 Adjusting the Temperature

1. From the Main Menu, select SENSOR SETUP and confirm.

2. Highlight the appropriate sensor if more than one sensor is attached and confirm.

3. Select CALIBRATE and confirm.

4. Select PROCESS TEMP and confirm.

5. Press ENTER when Stable, TEMP: XX.X is displayed. confirm to continue.

6. Adjust the Reading XX.X °C with the keypad and confirm.

7. CAL COMPLETE, OFFSET: X.X °C, confirm to continue.

8. MOVE PROBE TO PROCESS is displayed. Confirm.

4.6.2 pH (9184sc T.F.C. or 9184sc Chlorine + Acid only)

The manufacturer recommends calibrating the pH probe with a pH 4 and pH 7 buffer solution, regardless of sample pH.

4.6.2.1 Process pH 1 Point Sample

1. From the Main Menu, select SENSOR SETUP and confirm.

2. Highlight the appropriate sensor if more than one is attached and confirm.

3. Select CALIBRATE and confirm.

4. Select PROCESS PH and confirm.

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5. Select 1 POINT SAMPLE and select the available Output Mode (Active, Hold, or

Transfer) from the list box and confirm.

6. MOVE CLEAN PROBE TO SAMPLE is displayed. Confirm to continue.

7. VALUE: X.XX pH, TEMP: XX.X °C is displayed. Confirm to continue.

8. Adjust the SAMPLE VALUE: X.XX pH with the keypad and confirm.

9. COMPLETE, OFFSET: X.XX pH, SLOPE: XX.X% display. Confirm to continue.

10. Return Probe to Process displays. Confirm.

4.6.2.2 Process pH 2 Point Sample

1. From the Main Menu, select SENSOR SETUP and confirm.

2. Highlight the appropriate sensor if more than one is attached and confirm.

3. Select CALIBRATE and confirm.

4. Select PROCESS PH and confirm.

5. Select 2 POINT SAMPLE and aelect the available Output Mode (Active, Hold, or

Transfer) from the list box and confirm.

Operation

6. MOVE CLEAN PROBE TO SAMPLE1 and confirm.

7. VALUE: X.XX pH, TEMP: XX.X °C is displayed. Confirm to continue.

8. Adjust the SAMPLE VALUE: X.XX pH to the known pH with the keypad and confirm.

9. MOVE CLEAN PROBE TO SAMPLE2, Press ENTER to Continue is displayed.

Confirm.

10. VALUE: XX.XX pH, TEMP: XXX °C is displayed. Confirm to continue.

11. Adjust the second SAMPLE VALUE: X.XX pH to the known pH with the keypad and

confirm.

12. VALUE: XX.XX pH, TEMP: XXX °C IS displayed. Confirm to continue.

13. COMPLETE, SLOPE: XXX.X%, OFFSET: X.XX pH is displayed. Confirm to continue.

14. Return Probe to Process displays. Confirm.

4.6.3 Concentration Calibration

9184sc

To test for Total Free Chlorine, use the Total Free Chlorine Calibration Method, with the manufacturer DPD test kits (Cat. No. 2105545). These test kits go with the DR/4000 and DR/2500 spectrophotometers and the DR/800 colorimeter.

Use the Pocket Colorimeter II™ for measuring free chlorine concentrations with the DPD method that is available from the manufacturer (Cat. No. 5870023) for all other 9184sc uses.

9185sc

To test for Ozone, use the Indigo Method, Ozone HR AccuVac test (Cat. No. 25180-25) that goes with the DR/4000, DR/2500, DR/890, and the Pocket Colorimeter II.

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Operation

9187sc

To test for Chlorine Dioxide use the DPD Glycine Method, Chlorine Dioxide Reagent Set (Cat. No. 27709-00) that goes with the DR/4000, DR/2500, and DR/890, and Pocket Colorimeter II.

Note: Please reference the manufacturer catalog for other methods.

When performing the following steps, calculate the pH first then write down that number for reference.

4.6.3.1 Process Calibration

When performing these steps, calculate the pH first then write down that number for reference.

1. From the Main Menu, select SENSOR SETUP and confirm.

2. Highlight the appropriate sensor if more than one sensor is attached and confirm.

3. Select CALIBRATE and confirm.

4. Select PROCESS CONC and confirm.

5. Move Clean Probe to Sample, Press ENTER to continue is displayed. Confirm.

6. Confirm when Stable, VALUE: X.X nA, TEMP: XX.X °C.

7. (9184sc only) Adjust the pH VALUE: +X.XXpH (this is an actual value) with the keypad

8. Adjust the TFC or CONCENTRATION VALUE (depending on instrument purchased):

Note: Refer to section 4.6.3 on page 23. If adjusting the TFC value, use the Total Free Chlorine Method.

9. COMPLETE, SLOPE: nA/MG, OFFSET: uA is displayed and confirm to continue.

10. RETURN PROBE TO PROCESS is displayed and confirm.

4.6.4 Zero Calibration

The Zero Calibration can be performed in two different ways: chemically or electrically. To perform a Zero Calibration, refer to

For most users, the manufacturer recommends using the Electrical Zero Calibration. This uses a purely electrical means of setting the zero calibration point which is completely automated. Changing the setting first in CAL CONFIG is the only way to obtain a chemical zero calibration. The electrical is standard and the chemical is optional. See section 4.6.5

on page 25.

and confirm.

XXX.X ppb (this is an actual value) with the keypad and confirm.

section 4.6.5 on page 25.

In low range applications (<50ppb), it is recommended to use the Chemical Zero Method. The Chemical Zero Method requires a sample that is completely free of any oxidants. An oxidant free reference sample may be produced by leaving water in an open container for 24 hours. For best results use actual process water. Bubble the water, if possible, to speed up the oxidant evaporation.

The Upper Level Calibration point is obtained by reference to a laboratory method (process calibration).

Page 27

4.6.4.1 Chemical Zero Calibration

1. From the Main Menu, select SENSOR SETUP and confirm.

2. Highlight the appropriate sensor if more than one is attached and confirm.

3. Select CALIBRATE and confirm.

4. Select ZERO and select the available Output Mode (Active, Hold, or Transfer) from

the list box and confirm.

5. MOVE CLEAN PROBE TO SAMPLE and confirm.

6. VALUE: XX.X µg/l, TEMP: XX.X °C is displayed and confirm to continue.

7. Complete OFFSET: 0.0 uA is displayed and confirm to continue.

8. RETURN PROBE TO PROCESS is displayed and confirm.

4.6.5 Calibration Configuration

1. From the Main Menu, select SENSOR SETUP and confirm.

2. Highlight the appropriate sensor if more than one sensor is attached and confirm.

Operation

3. Select CALIBRATE and confirm.

4. Select CAL CONFIG and confirm.

5. OUTPUT MODE displays. Use the keypad to choose one of the following: ACTIVE,

HOLD, TRANSFER, or CHOICE and confirm. (Returns to the CAL CONFIG menu.)

6. Select CAL CONFIG and confirm.

7. Select CAL ZERO and confirm.

8. Choose either ELECTRICAL or CHEMICAL and confirm. (Returns to the CAL

CONFIG menu.)

9. Select CAL CONFIG and confirm.

10. Select CAL Delay and confirm.

11. Adjust the Day XX using the keypad and confirm. (Returns to the CAL CONFIG

menu.)

4.7 Set Calibration Defaults

1. From the Main Menu, select SENSOR SETUP and confirm.

2. Highlight the appropriate sensor if more than one sensor is attached and confirm.

3. Select CALIBRATE and confirm.

4. Select DEFAULT SETUP and confirm.

5. ARE YOU SURE? displays. Confirm to continue.

6. Complete displays. Confirm to continue. (Returns to the CALIBRATE menu.)

Page 28

Operation

Page 29

Section 5 Maintenance

DANGER Only qualified personnel should conduct the tasks described in this section of the manual.

5.1 Maintenance Schedule

The following schedule shows the minimum maintenance requirements for typical operation.

Maintenance Task 2 Months 3 Months 6 Months Annually

Membrane X

Electrolyte X

pH (9184sc only) X

Cleaning

Tubing X

Calibration X

Maintenance frequency is application dependent. Additional or less maintenance will be appropriate in some applications. The

sensor must be cleaned before liquid standard verification or calibration.

5.2 Scheduled Maintenance

5.2.1 Replacing the Membrane

Note: When removing the probe from the sample, we recommend keeping the probe vertical with the membrane facing down. Avoid touching the active part of the membrane.

Replace the membrane every 6 months under typical operating conditions, or more frequently as experience dictates (

1. Shut off the sample supply. Remove the probe cable.

2. Unscrew the probe retaining ring. Remove the sensor.

Note: Removing the sensor may activate alarms. Ensure that removing the sensor will not affect plant operation by switching to maintenance mode.

3. Unscrew the electrode retaining ring and filling screw.

Note: Never pull sharply on the electrode when the filling screw is in place.

4. Remove the electrode. Pour out the electrolyte.

Figure 12).

5. Unscrew the membrane.

Note: Do not re-install a used membrane. After changing the membrane, allow the probe to stabilize for at least three hours; recalibrate the sensor.

For re-assembly, see section 3.5.1 on page 11.

Page 30

Maintenance

Figure 12 Disassembling the Sensor

1. Probe Chamber 6. Measurement Electrode

2. Probe Assembly 7. Probe Body

3. Probe Retaining Nut 8. Filling Screw

4. Electrode Cable Connector 9. Probe Body Washer

5. Electrode Retaining Ring 10. Pre-mounted Membrane

5.2.2 Replacing the Tubing

Replace the tubing annually, if necessary.

5.2.3 Replacing the Electrolyte

Replace the electrolyte when changing the membrane. Refer to section 3.5.1 on page 11 to replace the electrolyte.

5.2.4 Replacing the pH Electrode (9184sc only)

Replace the electrode 12 to 18 months depending on the application.

Page 31

Section 6 Troubleshooting

6.1 Error Messages

Note: When an error occurs, the measurement values are replaced by dashes, (- - -).

Message Type Error Message Solution

Check the current value, along with the calibration parameters. Check electrode.

Ensure that there are no short-circuits on the measurement chain. Check the polarizing voltage.

No communication. Verify the connection and the cable. Test the 12V power supply.

No communication. Verify the sensor is properly connected to the transmitter. Verify that the cable is not damaged. Test the 12V power supply. Open the sensor and change the board.

Temperature measurement is below –2°C. Verify that the actual temperature is not below –2°C. Verify the internal resistance of the NTC/K, which must be around 10 K. Connect the sensor simulator and verify the RAW value.

Verify the actual temperature is not higher than 45 °C. Connect the sensor simulator and verify the RAW value.

PH electrode is clogged, broken or too old. Calibrate the pH electrode. Clean the electrode. Replace the electrode.

The temperature difference between calibration and the theoretical sensor response is greater than the allowed limit. Limits: ±20 °C. Check temperature calibration (see

The measured value is out of the programmed scale range for analog outputs 1 and 2.

Measurement-related

Error Messages

Calibration-related

Error Messages

CONC TOO HIGH

CONC TOO LOW

TEMPERATURE ERROR Check for short-circuit or open circuit.

INT. TOO LOW Negative current. Check the electrode (electrolyte and membrane).

INT. TOO HIGH

***** on the main display

(At Connection time:) SENSOR

MISSING

FFFFFFFFFFFFF displays

COMMUNICATION ERROR Open the sensor and verify that there is no humidity.

TEMP TOO LOW

TEMP TOO HIGH

RAW MEASURMENT Change the preamplifier.

PH TOO LOW (9184sc only)

PH TOO HIGH (9184sc only)

ΔT OUT OF LIMITS

OUT OF 4/20 mA

4.6.1 Temperature Sensor Calibration),

6.2 Warning Messages

Warning Display Problem Resolution

CAL FAIL SLOPE

LOW

CAL FAIL SLOPE

HIGH

CAL TOO OLD

Slope is outside the limits.

The last calibration was more than x days ago. (Setting from the sensor setup)

Adjust so that it is within the limits by checking zero cal, ensuring the proper flow rate, and validating that it’s clean. Be sure to put in the actual value and not the offset value when adjusting.

Calibrate the sensor. Set the calibration interval in the sensor setup.

Page 32

Troubleshooting

Page 33

Section 7 Replacement Parts and Accessories

7.1 Replacement Parts, Sensor Only

Description Catalog Number

9184sc HOCl Chlorine Sensor LXV430.99.00001 9184sc TFC Chlorine Sensor With pH LXV432.99.00001 9185sc Ozone Sensor LXV433.99.00001 9187sc Chlorine Dioxide Sensor LXV434.99.00001

7.2 Replacement Parts

Description Catalog Number

pH Electrode 368416,00000 9184sc set of 4 pre-mounted membranes 09184=A=3500 9185sc set of 4 pre-mounted membranes 09185=A=3500 9187sc set of 4 pre-mounted membranes 09187=A=3500 Electrolyte for the 9184sc 09184=A=3600 Electrolyte for the 9185sc 09185=A=3600 Electrolyte for the 9187sc 09187=A=3600 Replacement electrode for the 9184 sc 09184=A=1001 Replacement electrode for the 9185 sc 09185=A=1000 Replacement electrode for the 9187 sc 09184=A=1001 Replacement probe body 09184=C=4100 Filling screw 09184=C=1030 Syringe 560150,21957 Pre-assembled flow cell LZY053 Mounting panel LZY059 ¼ in tubing adapter 09184=A=4020 Replacement gateway circuit board LZX823 Replacement cable to transmitter LZY105 Replacement electrode cable 09184=A=4300 Replacement pH probe cable 09184=A=4400 Manual DOC023.52.00051

7.3 Optional Accessories

Description Catalog Number

9180sc Acidification Unit LZY051 9180sc Intermittent Flow Unit LZY052 Versa Stand 5743200 125V Power Cord w/ Strain Relief 5448800 230V Power Cord w/ Strain Relief 5448900 Chlorine Free, Pocket Colorimeter II, with SwifTest DPD Reagent Dispenser 5870023 Chlorine, Free, DPD Test 'N-Tube, 10 mL sample, 50/test 2105545 Ozone HR AccuVac 2518025 Chlorine Dioxide Reagent Set 2770900

Page 34

Replacement Parts and Accessories

7.4 Extension Cables

Description Catalog Number

Cable, sensor extension, 0,35 m LZX847 Cable, sensor extension, 5 m LZX848 Cable, sensor extension, 10 m LZX849 Cable, sensor extension, 15 m LZX850 Cable, sensor extension, 20 m LZX851 Cable, sensor extension, 30 m LZX852

Page 35

Section 8 Contact

HACH Company World Headquarters

P.O. Box 389 Loveland, Colorado 80539-0389 U.S.A. Tel (800) 227-HACH (800) -227-4224 (U.S.A. only) Fax (970) 669-2932 orders@hach.com www.hach.com

HACH LANGE GMBH

Willstätterstraße 11 D-40549 Düsseldorf Tel. +49 (0)2 11 52 88-320 Fax +49 (0)2 11 52 88-210 info@hach-lange.de www.hach-lange.de

HACH LANGE GMBH

Rorschacherstrasse 30a CH-9424 Rheineck Tel. +41 (0)848 55 66 99 Fax +41 (0)71 886 91 66 info@hach-lange.ch www.hach-lange.ch

Repair Service in the United States:

HACH Company Ames Service 100 Dayton Avenue Ames, Iowa 50010 Tel (800) 227-4224 (U.S.A. only) Fax (515) 232-3835

HACH LANGE LTD

Pacific Way Salford GB-Manchester, M50 1DL Tel. +44 (0)161 872 14 87 Fax +44 (0)161 848 73 24 info@hach-lange.co.uk www.hach-lange.co.uk

HACH LANGE FRANCE S.A.S.

8, mail Barthélémy Thimonnier Lognes F-77437 Marne-La-Vallée cedex 2 Tél. +33 (0) 820 20 14 14 Fax +33 (0)1 69 67 34 99 info@hach-lange.fr www.hach-lange.fr

Repair Service in Canada:

Hach Sales & Service Canada Ltd. 1313 Border Street, Unit 34 Winnipeg, Manitoba R3H 0X4 Tel (800) 665-7635 (Canada only) Tel (204) 632-5598 Fax (204) 694-5134 canada@hach.com

HACH LANGE LTD

Unit 1, Chestnut Road Western Industrial Estate IRL-Dublin 12 Tel. +353(0)1 460 2522 Fax +353(0)1 450 9337 info@hach-lange.ie www.hach-lange.ie

HACH LANGE NV/SA

Motstraat 54 B-2800 Mechelen Tel. +32 (0)15 42 35 00 Fax +32 (0)15 41 61 20 info@hach-lange.be www.hach-lange.be

Repair Service in Latin America, the Caribbean, the Far East, Indian Subcontinent, Africa, Europe, or the Middle East:

Hach Company World Headquarters, P.O. Box 389 Loveland, Colorado, 80539-0389 U.S.A. Tel +001 (970) 669-3050 Fax +001 (970) 669-2932 intl@hach.com

HACH LANGE GMBH

Hütteldorfer Str. 299/Top 6 A-1140 Wien Tel. +43 (0)1 912 16 92 Fax +43 (0)1 912 16 92-99 info@hach-lange.at www.hach-lange.at

DR. LANGE NEDERLAND B.V.

Laan van Westroijen 2a NL-4003 AZ Tiel Tel. +31(0)344 63 11 30 Fax +31(0)344 63 11 50 info@hach-lange.nl www.hach-lange.nl

HACH LANGE APS

Åkandevej 21 DK-2700 Brønshøj Tel. +45 36 77 29 11 Fax +45 36 77 49 11 info@hach-lange.dk www.hach-lange.dk

HACH LANGE LDA

Av. do Forte nº8 Fracção M P-2790-072 Carnaxide Tel. +351 214 253 420 Fax +351 214 253 429 info@hach-lange.pt www.hach-lange.pt

HACH LANGE KFT.

Vöröskereszt utca. 8-10. H-1222 Budapest XXII. ker.

Tel. +36 1 225 7783 Fax +36 1 225 7784 info@hach-lange.hu www.hach-lange.hu

HACH LANGE AB

Vinthundsvägen 159A SE-128 62 Sköndal Tel. +46 (0)8 7 98 05 00 Fax +46 (0)8 7 98 05 30 info@hach-lange.se www.hach-lange.se

HACH LANGE SP. ZO.O.

ul. Krakowska 119 PL-50-428 Wrocław Tel. +48 801 022 442 Zamówienia: +48 717 177 707 Doradztwo: +48 717 177 777 Fax +48 717 177 778 info@hach-lange.pl www.hach-lange.pl

HACH LANGE S.R.L.

Str. Căminului nr. 3, et. 1, ap. 1, Sector 2 RO-021741 Bucureşti Tel. +40 (0) 21 205 30 03 Fax +40 (0) 21 205 30 17 info@hach-lange.ro www.hach-lange.ro

HACH LANGE S.R.L.

Via Rossini, 1/A I-20020 Lainate (MI) Tel. +39 02 93 575 400 Fax +39 02 93 575 401 info@hach-lange.it www.hach-lange.it

HACH LANGE S.R.O.

Zastrčená 1278/8 CZ-141 00 Praha 4 - Chodov Tel. +420 272 12 45 45 Fax +420 272 12 45 46 info@hach-lange.cz www.hach-lange.cz

HACH LANGE

8, Kr. Sarafov str. BG-1164 Sofia Tel. +359 (0)2 963 44 54 Fax +359 (0)2 866 15 26 info@hach-lange.bg www.hach-lange.bg

HACH LANGE S.L.U.

Edificio Seminario C/Larrauri, 1C- 2ª Pl. E-48160 Derio/Vizcaya Tel. +34 94 657 33 88 Fax +34 94 657 33 97 info@hach-lange.es www.hach-lange.es

HACH LANGE S.R.O.

Roľnícka 21 SK-831 07 Bratislava – Vaj nory Tel. +421 (0)2 4820 9091 Fax +421 (0)2 4820 9093 info@hach-lange.sk www.hach-lange.sk

HACH LANGE SU ANALİZ SİSTEMLERİ LTD.ŞTİ.

Ilkbahar mah. Galip Erdem Cad. 616 Sok. No:9 TR-Oran-Çankaya/ANKARA Tel. +90312 490 83 00 Fax +90312 491 99 03 bilgi@hach-lange.com.tr www.hach-lange.com.tr

Page 36

Contact

HACH LANGE D.O.O.

Fajfarjeva 15 SI-1230 Domžale Tel. +386 (0)59 051 000 Fax +386 (0)59 051 010 info@hach-lange.si www.hach-lange.si

HACH LANGE OOO

Finlyandsky prospekt, 4A Business Zentrum “Petrovsky fort”, R.803 RU-194044, Sankt-Petersburg Tel. +7 (812) 458 56 00 Fax. +7 (812) 458 56 00 info.russia@hach-lange.com www.hach-lange.com

ΗΑCH LANGE E.Π.Ε.

Αυλίδος 27 GR-115 27 Αθήνα Τηλ. +30 210 7777038 Fax +30 210 7777976 info@hach-lange.gr www.hach-lange.gr

HACH LANGE D.O.O.

Ivana Severa bb HR-42 000 Varaždin Tel. +385 (0) 42 305 086 Fax +385 (0) 42 305 087 info@hach-lange.hr www.hach-lange.hr

HACH LANGE MAROC SARLAU

Villa 14 – Rue 2 Casa Plaisance Quartier Racine Extension MA-Casablanca 20000 Tél. +212 (0)522 97 95 75 Fax +212 (0)522 36 89 34 info-maroc@hach-lange.com www.hach-lange.ma

Page 37

Section 9 Warranty, liability and complaints

HACH LANGE GmbH warrants that the product supplied is free of material and manufacturing defects and undertakes the obligation to repair or replace any defective parts at zero cost.

The warranty period for instruments is 24 months. If a service contract is taken out within 6 months of purchase, the warranty period is extended to 60 months.

With the exclusion of the further claims, the supplier is liable for defects including the lack of assured properties as follows: all those parts that can be demonstrated to have become unusable or that can only be used with significant limitations due to a situation present prior to the transfer of risk, in particular due to incorrect design, poor materials or inadequate finish will be improved or replaced, at the supplier's discretion. The identification of such defects must be notified to the supplier in writing without delay, however at the latest 7 days after the identification of the fault. If the customer fails to notify the supplier, the product is considered approved despite the defect. Further liability for any direct or indirect damages is not accepted.

If instrument-specific maintenance and servicing work defined by the supplier is to be performed within the warranty period by the customer (maintenance) or by the supplier (servicing) and these requirements are not met, claims for damages due to the failure to comply with the requirements are rendered void.

Any further claims, in particular claims for consequential damages cannot be made.

Consumables and damage caused by improper handling, poor installation or incorrect use are excluded from this clause.

HACH LANGE GmbH process instruments are of proven reliability in many applications and are therefore often used in automatic control loops to provide the most economical possible operation of the related process.

To avoid or limit consequential damage, it is therefore recommended to design the control loop such that a malfunction in an instrument results in an automatic change over to the backup control system; this is the safest operating state for the environment and the process.

Page 38

Warranty, liability and complaints

Page 39

Appendix A 9184sc Theory of Operation

A.1 Theory of Operation

The 9184sc Chlorine Analyzer is an on-line, single-channel industrial analyzer that measures free chlorine in drinking water treatment plants, distribution networks, and other applications that require monitoring free chlorine at the ppb and ppm levels.

This instrument uses an amperometric method to measure HOCl concentration. A

membrane allows the selective diffusion of HOCl molecules to the amperometric sensor

(

Figure 1 on page 6). The measurement is compensated for pH and temperature.

A.1.1 Principle of Operation

Specific terms exist to mention the different species of chlorine:

• Active Chlorine HOCl (hypochlorous acid)

It is the most powerful disinfectant, up to 100 times more efficient than hypochlorite

• Total Free Chlorine (TFC): HOCl + ClO

It is composed of dissolved chlorine (at low pH values), hypochlorous acid gas and hypochlorite ion. These species coexist, their relative proportion is depending on pH and temperature (see curve below for a dissociation at 25°C).

–

• Total Combinated Chlorine (TCC):

It results from the addition of total free chlorine and chloramines (mono-, di- and trichloramine). The 9184 sc does not measure this parameter.

Fraction of Cl2, HOCl and ClO– react as a function of pH (Figure 13).

Figure 13 Dissociation Curve

The dissociation reactions are as follow: Cl2 + H2O ♦ H+ + Cl– + HOCl pK1 = 4.6 at 25°C

HOCl ♦ H+ + ClO–

pK2 = 7.5 at 25°C

Page 40

9184sc Theory of Operation

HOCl H+2e–Cl

–

→ H2O++ +

2Cl–2Ag

+ 2AgCl 2e–+→

It is also important to notice that the dissociation constants are temperature-dependent (the equipment takes into account this element).

The amperometric sensor consists of:

• a gold working electrode (cathode) where the main reaction occurs

• a silver counter-reference electrode (anode)

• KCl electrolyte

• a microporous membrane selective to HOCl

The HOCl molecules in the sample diffuse through the membrane to a thin region between the membrane and the cathode that contains the electrolyte.

A constant potential is applied to the working electrode where HOCl is reduced according to the reaction:

At the silver electrode (anode) the silver is oxidized to Ag+:

The reduction in HOCl at the cathode generates a current that is directly proportional to its partial pressure in the sample.

The electrochemical reaction and diffusion through the membrane are dependent upon temperature. Consequently, the measurement cell contains a temperature sensor that allows for automatic temperature compensation.

In the acidification version an additional analyzer version offers the possibility to measure samples with a high pH value. The sample pH is kept constant between 5.5 and 6.5 by continuously adding acid solution. At such pH levels, all ClO

–

ions turn into HOCl, thus

enabling the sensor to measure TFC.

Page 41

Appendix B 9185sc Theory of Operation

B.1 Theory of Operation

The 9185sc Ozone Analyzer is an on-line, single-channel industrial analyzer that measures ozone in drinking water treatment plants, distribution networks, and other applications that require monitoring ozone at the ppb and ppm levels.

This instrument uses an amperometric method to measure O3 concentration. A membrane allows the selective diffusion of

page 6). The measurement is compensated for pH and temperature.

B.1.1 Principle of Operation

Ozone is a gas that is highly soluble in water (13 times more than oxygen). It is unstable when dissolved in water.

Effects on solubility:

• Some parameters e.g. temperature and pH can influence the stability of the

measurement. The solubility of ozone in water decreases rapidly with temperature.

Effects of pH: Ozone reacting with OH– hydroxide ions: the greater the number of these ions (high pH), the greater the degree of breakdown. Conversely, at a low pH, breakdown will be slower (

Figure 14).

molecules to the amperometric sensor (Figure 1 on

Figure 14 Time of Breakdown of Dissolved Ozone

Finally, it is worth noting that, as the OH– ion is a by-product of ozone breakdown in water, the reaction between OH ozone. This is more pronounced if air is mixed with the water sample.

The exposure to free air of ozone water results in significant degassing: as the ozone content of ambient air is very low compared to that of the sample, exchange therefore occurs, with rapid loss of ozone in the sample.

This problem is even more pronounced if air/water mixing occurs. All of these phenomena, therefore, require that certain precautions be taken concerning the sampling line (

section 3.2 on page 10 and section 3.3 on page 10).

–

and O3 can be sustained until complete disappearance of the

Page 42

9185sc Theory of Operation

Page 43

Appendix C 9187sc Theory of Operation

C.1 Theory of Operation

The 9187sc Chlorine Dioxide Analyzer is an on-line, single-channel industrial analyzer that measures chlorine dioxide in drinking water treatment plants, distribution networks, and other applications that require monitoring chlorine dioxide at the ppb and ppm levels.

This instrument uses an amperometric method to measure chlorine dioxide concentration. A

membrane allows the selective diffusion of ClO2 molecules to the amperometric sensor

(

Figure 1 on page 6). The measurement is compensated for temperature.

C.1.1 Principle of Operation

Measurement is carried out using an amperometric method after diffusion of the chlorine dioxide molecules through a membrane. The molecules of chlorine dioxide contained in the sample diffuse through the membrane and are then found in an electrolyte zone of very slight thickness between the membrane and the cathode. A constant work potential is applied to the work electrode (cathode) where CIO2 is reduced according to the reaction:

ClO2 + 5e– + 4H+ ♦ Cl– + 2H2O

At the silver electrode (anode) the silver is oxidized to:

Ag+ : Cl– + Ag ♦ AgCl + e

The reduction in chlorine dioxide at the cathode generates a current which is directly proportional to the partial pressure of it in the sample. The electrochemical reaction and diffusion through the membrane are dependent upon temperature, consequently the measurement cell is fitted with a temperature sensor which enables the automatic compensation of measurement variations according to temperature.

–

Page 44

9187sc Theory of Operation

Page 45

Appendix D Modbus Register Information

Table 2 Sensor Modbus Registers

Tag Name Register # Data Type Length R/W Description

Main Measurement Parameter in mg/L

pH Measurement Param. 40003 Float 2 R pH Measurement Tag Temperature measurement 40005 Float 2 R Temperature measurement Current Measurement Parameter in

µA Main Measurement Parameter in

ppm

Main Measurement Parameter in ppb 40011 Float 2 R

Main Measurement Parameter in µg/L

Current Measurement Parameter in nA

Raw pH measurement 40017 Float 2 R Raw pH measurement mV Raw measurement 40019 Float 2 R Raw ORP measurement Raw Temperature measurement 40021 Float 2 R Raw Temperature measurement AutoRange Concentration in ppX 40023 Integer 1 R Auto Ranging Tag in ppX AutoRange Concentration in Xg/L 40024 Integer 1 R Auto Ranging Tag in xg/L

AutoRange Current 40025 Integer 1 R

Concentration Tag-based 40026 Integer 1 R

Temperature Tag-based 40027 Integer 1 R/W

Sensor Name[0] 40028 Integer 1 R/W Sensor Name[0] Sensor Name[1] 40029 Integer 1 R/W Sensor Name[1] Sensor Name[2] 40030 Integer 1 R/W Sensor Name[2] Sensor Name[3] 40031 Integer 1 R/W Sensor Name[3] Sensor Name[4] 40032 Integer 1 R/W Sensor Name[4] Sensor Name[5] 40033 Integer 1 R/W Sensor Name[5] Function code 40034 Integer 1 Function code Next Step 40035 Integer 1 Next Step Password 40036 Pass 1 R/W Password Serial Number[0] 40037 Integer 1 R/W Serial Number[0] Serial Number[1] 40038 Integer 1 R/W Serial Number[1] Serial Number[2] 40039 Integer 1 R/W Serial Number[2] Application toogle 40040 Integer 1 R/W 9184..9187 applications

Active Concentration unit 40041 Integer 1 R/W

Concentration unit toogle 40042 Bit 1 R/W Concentration unit toogle (ppm-mg/L) Temperature unit toogle 40043 Bit 1 R/W Temperature unit toogle (°C-°F) Concentration offset unit 40044 Integer 1 R Concentration offset unit (na-µA)

Compensation pH toogle 40045 Integer 1 R/W

pH display format toogle 40046 Bit 1 R/W pH display format XX.X or XX.XX

40001 Float 2 R

40007 Float 2 R Current measurement in µA

40009 Float 2 R

40013 Float 2 R

40015 Float 2 R Current measurement in nA

Concentration Measurement Tag in mg/L

Concentration Measurement Tag in ppm

Concentration Measurement Tag in ppb

Concentration Measurement Tag in µg/L

Auto Ranging redirection of nA-µA units

Redirection tag for concentration ppm-mg/L units

Redirection tag for temperature unit (°C-°F)

Active concentration unit (ppm or mg/L)

Compensation pH toogle (manual-auto)

Page 46

Modbus Register Information

Table 2 Sensor Modbus Registers (continued)

Tag Name Register # Data Type Length R/W Description

--- 40047 Integer 1 R/W Internal use

--- 40048 Integer 1 R/W Internal use Averaging 40049 Integer 1 R/W Averaging Automatic/Manual temperature

toogle Manual Temperature unit 40051 Integer 1 R/W Manual Temperature unit Manual Temperature 40052 Float 2 R/W Manual Temperature Manual pH 40054 Float 2 R/W Manual pH 50/60 Hz toogle 40056 Bit 1 R/W 50/60 Hz toogle Output Mode 40057 Integer 1 R Internal use

--- 40058 Integer 1 R Internal use

--- 40059 Integer 1 R Internal use

--- 40060 Integer 1 R Internal use

--- 40061 Integer 1 R Internal use

--- 40062 Integer 1 R Internal use

--- 40063 Integer 1 R Internal use

--- 40064 Integer 1 R Internal use

--- 40065 Float 2 R Internal use

--- 40067 Float 2 R Internal use

--- 40069 Float 2 R Internal use Temperature Offset 40071 Float 2 R/W Temperature Offset Temperature Offset unit 40073 Integer 1 R Internal use pH Buffer 1 Measurement 40074 Float 2 R Internal use pH Buffer 2 Measurement 40076 Float 2 R Internal use Cal Conc Measurement 40078 Float 2 R Internal use Cal TFC Measurement 40080 Float 2 R Internal use Output Mode 40082 Integer 1 R Internal use Software version 40083 Float 2 R Software version Serial Number String[0] 40085 Integer 1 R/W Internal use Serial Number String[2] 40086 Integer 1 R/W Internal use Serial Number String[4] 40087 Integer 1 R/W Internal use Serial Number String[6] 40088 Integer 1 R/W Internal use Serial Number String[8] 40089 Integer 1 R/W Internal use Serial Number String[10 40090 Integer 1 R/W Internal use pH Offset 40091 Float 2 R pH Calibration Offset pH Slope 40093 Float 2 R pH Calibration slope Concentration Offset 40095 Float 2 R Concentration Offset Concentration Slope 40097 Float 2 R Concentration Slope Calibration Return Status 40099 Integer 1 R Calibration Return Status Time between two calibrations 40100 Integer 1 R/W Time between two calibrations

Concentration zero toogle 40101 Integer 1 R/W

Time from start up 40102 Integer 1 R Time the system is running Time to exchange Humidity bag 40103 Integer 1 R Time the humidity bag has been used

40050 Bit 1 R/W Automatic/Manual temperature toogle

Concentration zero toogle (electrical-chemical)

Page 47

Modbus Register Information

Table 2 Sensor Modbus Registers (continued)

Tag Name Register # Data Type Length R/W Description

DriverVersion_float 40104 Float 2 R Driver version

--- 40106 Float 2 R Internal use Measurement Logging Interval 40108 Integer 1 R/W Sensor Data logging interval Temperature Logging Interval 40109 Integer 1 R/W Temperature logging interval

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Modbus Register Information

Page 49

Index

Attaching the Sensor .................................................... 15

Dissociation Curve........................................................ 37

Error Messages ............................................................ 29

Instrument Specifications ............................................... 3

Mounting

Installation Considerations..................................... 10

Optional pH................................................................... 15

Probe Components ...................................................... 11

Replacement Parts and Accessories ........................... 31

Safety ............................................................................. 5

Sample Line ................................................................. 10

sc100 Warning Messages ............................................ 29

Sensor

Data Logging ......................................................... 19

Sensor Cable

Wiring..................................................................... 16

Theory 9184sc.............................................................. 37

Theory 9185sc.............................................................. 39

Theory 9187sc.............................................................. 41

Page 50

Index