De Nora Capital Controls CHLORALERT 17CA3000 Series User manual

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Instruction Manual
Series 17CA3000
ChloralertTM Plus Multi-Gas Detector
CAPITAL CONTROLS®

325.6610.17 - 2 -
USE ONLY IN ACCORDANCE WITH INSTRUCTION MANUAL
WARNING: HAZARDOUS VOLTAGES.
PROTECTIVE GROUND (EARTH) TERMINAL
WARNING: FAILURE TO INSTALL, SET UP OR OPERATE
THE EQUIPMENT IN THE MANNER SPECIFIED BY DE NORA WATER TECHNOLOGIES
MAY IMPAIR THE PROPER OPERATION OF THIS EQUIPMENT
These instructions describe the installation, operation and maintenance of the subject equipment. Failure to
strictly follow these instructions can lead to an equipment rupture that may cause signicant property damage,
severe personal injury and even death. If you do not understand these instructions, please call De Nora Water
Technologies for clarication before commencing any work at [phone] and ask for a Field Service Manager.
De Nora Water Technologies, Inc. reserves the rights to make engineering renements that may not be described
herein. It is the responsibility of the installer to contact De Nora Water Technologies, Inc. for information that cannot be
answered specically by these instructions.
Any customer request to alter or reduce the design safeguards incorporated into De Nora Water Technologies
equipment is conditioned on the customer absolving De Nora Water Technologies from any consequences of such
a decision.
De Nora Water Technologies has developed the recommended installation, operating and maintenance procedures
with careful attention to safety. In addition to instruction/operating manuals, all instructions given on labels or attached
tags should be followed. Regardless of these efforts, it is not possible to eliminate all hazards from the equipment or
foresee every possible hazard that may occur. It is the responsibility of the installer to ensure that the recommended
installation instructions are followed. It is the responsibility of the user to ensure that the recommended operating and
maintenance instructions are followed. De Nora Water Technologies, Inc. cannot be responsible deviations from the
recommended instructions that may result in a hazardous or unsafe condition.
De Nora Water Technologies, Inc. cannot be responsible for the overall system design of which our equipment may be
an integral part of or any unauthorized modications to the equipment made by any party other that De Nora Water
Technologies, Inc.
De Nora Water Technologies, Inc. takes all reasonable precautions in packaging the equipment to prevent shipping
damage. Carefully inspect each item and report damages immediately to the shipping agent involved for equipment
shipped “F.O.B. Colmar” or to De Nora Water Technologies for equipment shipped “F.O.B Jobsite”. Do not install dam-
aged equipment.
De Nora Water Technologies, Colmar Operations
Colmar, Pennsylvania, USA
is ISO 9001: 2008 Certied
READ THE ENTIRE MANUAL BEFORE OPERATING

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TABLE OF CONTENTS
SAFETY SUMMARY .....................................................................................................................................................7
READ FIRST .............................................................................................................................................................8
1.0 INTRODUCTION...............................................................................................................................................9
1.1 General ....................................................................................................................................................... 9
1.2 Model Number Breakdown....................................................................................................................... 10
1.3 Specifications............................................................................................................................................ 11
2.0 INSTALLATION ..............................................................................................................................................13
2.1 Inspection ................................................................................................................................................. 13
2.2 Location and Mounting ............................................................................................................................. 13
2.3 Receiver Electrical Connections ............................................................................................................... 13
2.4 Sensor/Transmitter Electrical Connections ............................................................................................... 17
3.0 FUNCTIONAL DESCRIPTION .......................................................................................................................19
3.1 General ..................................................................................................................................................... 19
3.2 Features .................................................................................................................................................... 19
3.2.1 Sensors/Transmitter ..................................................................................................................... 19
3.2.1.1 Gases........................................................................................................................... 19
3.2.1.2 Gas Concentration Range ........................................................................................... 19
3.2.1.3 Outputs ........................................................................................................................ 20
3.2.1.4 Power Consumption..................................................................................................... 20
3.2.1.5 Sensor Cross-Sensitivity .............................................................................................. 20
3.2.2 Receiver .................................................................................................................................. 20
3.2.2.1 Input Voltage................................................................................................................ 20
3.2.2.2 Power Requirements.................................................................................................... 20
3.2.2.3 Receiver Outputs ......................................................................................................... 21
3.2.2.3.1 Analog Outputs (AO).......................................................................................... 21
3.2.2.3.2 Digital Outputs (DO) .......................................................................................... 21
3.2.2.4 Keypad Push-button .................................................................................................... 21
3.2.2.5 Operating Modes......................................................................................................... 22
3.2.2.6 Password ..................................................................................................................... 22
3.2.2.7 Display Modes ............................................................................................................. 23
3.2.2.8 Watchdog Timer Circuit ............................................................................................... 24
3.2.2.9 Self-Test ....................................................................................................................... 24
3.2.2.9.1 Standard Tests ................................................................................................... 24
3.2.2.9.2 Extended Tests................................................................................................... 24
3.2.2.9.3 Self-test Failure Messages ................................................................................. 25
3.2.2.10 Sensor Check .............................................................................................................. 26
3.2.2.11 Calibration Mode ......................................................................................................... 27
3.2.2.12 Security and Safety...................................................................................................... 28
3.2.2.12.1 Password............................................................................................................ 28
3.2.2.12.2 Watchdog Timer................................................................................................. 28
3.2.2.12.3 Power Failure...................................................................................................... 28
3.2.2.13 Battery Operation......................................................................................................... 28
3.2.2.14 Operational Alarms...................................................................................................... 28
3.2.2.14.1 Level................................................................................................................... 29
3.2.2.14.2 Mode .................................................................................................................. 30
3.2.2.14.3 Latch .................................................................................................................. 30
3.2.2.14.4 Delay .................................................................................................................. 31
3.2.2.15 Event Displays .......................................................................................................... 32
3.2.2.15.1 Alarm Displays ................................................................................................... 32
3.2.2.15.2 Status Event Displays......................................................................................... 32
3.2.2.15.3 Event Queues..................................................................................................... 33
4.0 START-UP & OPERATION .............................................................................................................................36
4.1 Firmware Level.......................................................................................................................................... 36
4.2 Calibration Data ........................................................................................................................................ 36
4.3 Quick-Start ................................................................................................................................................ 37

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4.3.1 Data Entry .................................................................................................................................... 38
4.3.2 Configuration................................................................................................................................ 38
4.3.3 Setup............................................................................................................................................ 39
4.3.3.1 Menu Navigation & Defaults .................................................................................................. 39
4.3.3.2 Select Sensor Channel .......................................................................................................... 41
4.3.3.3 Select Sensor Type................................................................................................................ 41
4.3.3.4 Enter Sensor Calibration Parameters .................................................................................... 41
4.3.3.5 Configure Alarm .................................................................................................................... 42
4.3.3.6 Configure Digital Output........................................................................................................ 43
4.3.3.7 Return to RUN MODE............................................................................................................ 43
4.4 Menu Sequence........................................................................................................................................ 43
4.4.1 Setup............................................................................................................................................ 45
4.4.1.1 Direct Access ........................................................................................................................ 45
4.4.1.2 Password Protected .............................................................................................................. 45
4.4.2 Configure ..................................................................................................................................... 45
4.4.2.1 Instrument.............................................................................................................................. 45
4.4.2.1.1 Name ........................................................................................................................ 46
4.4.2.1.2 Engineering Units ..................................................................................................... 46
4.4.2.1.3 Display Mode............................................................................................................ 47
4.4.2.1.4 Set Time.................................................................................................................... 47
4.4.2.1.5 Set Date .................................................................................................................... 47
4.4.2.1.6 Change Password .................................................................................................... 48
4.4.2.1.6.1 Override the Password ....................................................................................... 48
4.4.2.1.7 Default Database...................................................................................................... 48
4.4.2.1.8 Set LCD Contrast ...................................................................................................... 48
4.4.2.1.9 Sensor Check ........................................................................................................... 49
4.4.2.1.10 Run Self-Test............................................................................................................. 50
4.4.2.1.11 Enter Configuration Code......................................................................................... 51
4.4.2.1.12 Custom Average Hours ............................................................................................ 51
4.4.2.1.13 Battery Status ........................................................................................................... 51
4.4.2.1.14 Software Version....................................................................................................... 52
4.4.2.2 Channels ............................................................................................................................... 52
4.4.2.2.1 Tag Name ................................................................................................................. 52
4.4.2.2.2 Sensor Type.............................................................................................................. 53
4.4.2.2.3 Alarm (1,2, or 3)........................................................................................................ 53
4.4.2.2.3.1 Level................................................................................................................... 53
4.4.2.2.3.2 Mode .................................................................................................................. 53
4.4.2.2.3.3 Latch .................................................................................................................. 54
4.4.2.2.3.4 Delay .................................................................................................................. 54
4.4.2.2.4 Analog Output .......................................................................................................... 54
4.4.2.2.4.1 Output ................................................................................................................ 54
4.4.2.2.4.2 Span................................................................................................................... 55
4.4.2.2.4.3 Zero.................................................................................................................... 55
4.4.2.2.4.4 Mode .................................................................................................................. 56
4.4.2.2.4.5 Calibration (Analog Output Parameters)............................................................ 56
4.4.2.2.5 Calibration (Sensor Parameters) .............................................................................. 57
4.4.2.2.5.1 Concentration..................................................................................................... 57
4.4.2.2.5.2 Span................................................................................................................... 57
4.4.2.2.5.3 Zero.................................................................................................................... 57
4.4.2.2.5.4 Sensor Data........................................................................................................ 58
4.4.2.3 Digital Outputs....................................................................................................................... 58
4.4.2.3.1 Source ...................................................................................................................... 58
4.4.2.3.2 Invert......................................................................................................................... 59
4.4.2.3.3 State.......................................................................................................................... 59
4.4.2.4 Comm Port ........................................................................................................................... 59
4.4.2.4.1 Baud Rate................................................................................................................. 60
4.4.2.4.2 Instrument Address .................................................................................................. 60
4.4.2.4.3 Parity......................................................................................................................... 60

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4.4.2.4.4 Datalink Enable.......................................................................................................... 61
4.4.2.4.5 Datalink Protocol........................................................................................................ 61
4.4.3 Run Calibration ....................................................................................................................... 61
4.4.4 Stop Calibration...................................................................................................................... 62
5.0 CALIBRATION ........................................................................................................................... 63
5.1 Sensor Calibration ............................................................................................................................ 63
5.1.1 Setup ............................................................................................................................63
5.1.2 Source ............................................................................................................................63
5.1.3 Calibration ............................................................................................................................63
5.1.3.1 General Calibration Overview .......................................................................................... 63
5.1.3.2 ZERO Calibration Procedure............................................................................................65
5.1.3.3 SPAN Calibration Procedure ............................................................................................66
5.2 Analog Output Calibration .........................................................................................................................66
5.2.1 Minimum Output Current Calibration...................................................................................... 67
5.2.2 Maximum Output Current Calibration..................................................................................... 67
6.0 COMMUNICATIONS ........................................................................................................................... 68
6.1 General 68
6.2 Interconnections 68
6.2.1 RS232 Plug Connections........................................................................................................69
6.2.2 RS422/485 Plug Connections.................................................................................................69
6.3 Configuring the System Module for Datalink .............................................................................................70
6.4 Protocol 70
6.4.1 Message Types ...................................................................................................................... 71
6.4.1.1 Host to Instrument............................................................................................................ 71
6.4.1.2 Instrument to Host............................................................................................................ 72
6.4.2 Transaction Examples.............................................................................................................72
6.5 Mnemonic-to-Datapoint Cross Reference .................................................................................................72
6.5.1 Database Starting Addresses ................................................................................................ 73
6.5.2 Instrument Memory Address Scheme.................................................................................... 73
6.6 Executing Instrument Self Tests Using Datalink ........................................................................................ 74
6.7 Database Prompt-to-Datapoint Cross Reference ......................................................................................75
7.0 MAINTENANCE ........................................................................................................................... 81
7.1 General ............................................................................................................................81
7.2 Routine Maintenance ............................................................................................................................81
7.3 Sensor/Transmitter Replacement ...............................................................................................................81
7.4 Troubleshooting82
7.4.1 General Troubleshooting ........................................................................................................82
7.4.2 Sensor Troubleshooting.......................................................................................................... 83
LIST OF FIGURES
Figure 1-1 Basic System Configuration......................................................................................................................... 9
Figure 1-2 Receiver Data Tag...................................................................................................................................... 10
Figure 2-1 Receiver Outline Dimensions ..................................................................................................................... 14
Figure 2-2 Sensor/Transmitter Outline Dimensions ..................................................................................................... 15
Figure 2-3 Interconnection Diagram ........................................................................................................................... 16
Figure 2-4 Sensor Wiring............................................................................................................................................. 18
Figure 3-1 Chloralert Plus Keypad .............................................................................................................................. 22
Figure 3-2 Basic Alarm Operation............................................................................................................................... 29
Figure 3-3 Self-Resetting Alarm Operation ................................................................................................................. 31
Figure 3-4 Latching Alarm Operation.......................................................................................................................... 31
Figure 4-1 Receiver Data Tag...................................................................................................................................... 36
Figure 4-2 Sensor Calibration Tag............................................................................................................................... 36
Figure 4-3 Startup Phases .......................................................................................................................................... 37
Figure 4-4 Receiver Data-Entry Keypad...................................................................................................................... 38
Figure 5-1 Label & Magnet Orientation....................................................................................................................... 64
Figure 6-1 RS-232 or RS-485 Datalink Module ........................................................................................................... 68
Figure 6-2 RS-232 Plug Connector ............................................................................................................................. 69
Figure 6-3 RS-485 Plug Connector ............................................................................................................................. 69
Figure 6-4 Floating Point Examples............................................................................................................................. 73

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LIST OF TABLES
Table 2-1 Sensor Wiring and Configuration......................................................................................................... 17
Table 3-1 Gas Cross-Sensitivity Data.................................................................................................................. 20
Table 4-1 Factory Default Database Parameters ................................................................................................ 40
Table 6-1 System Prompts (Datalink) .................................................................................................................. 70
Table 6-2 Datalink Protocol ................................................................................................................................. 71
Table 6-3 Datapoint Types................................................................................................................................... 73
Table 6-4 Database Starting Addresses ............................................................................................................. 74
Table 6-5 Datapoint Addresses........................................................................................................................... 72
Table 6-6 Prompt-to-Datapoint Cross Reference ........................................................................................... 75-80

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SAFETY SUMMARY
GENERAL RETURN OF EQUIPMENT
WARNINGS All equipment being returned to De Nora Water Technologies for repair must be free
of any hazardous materials. Contact De Nora Water Technologies for authorization prior
to returning equipment.
INSTRUCTION MANUALS
Do not install, maintain or operate this equipment without reading, understanding
and following the proper De Nora Water Technologies instructions and manuals,
other wise injury or damage may result.
ELECTRICAL SHOCK HAZARD
Equipment powered by AC line voltage presents a potential electric shock hazard
to the user. Make certain that the system power is disconnected from the operating
branch circuit before attempting electrical interconnections of service.
SPECIFIC WARNINGS ELECTRICAL SHOCK HAZARD
Equipment powered by AC line voltage presents a potential electric shock hazard.
Servicing of the Chloralert Plus should only be attempted by a qualified electronics
technician.
WARNING: ELECTRIC SHOCK HAZARD
Equipment powered by AC line voltage presents a potential electric shock hazard to
the user. Make certain that the system power input and Digital Output replay
connections are disconnected from the operating branch circuit before attempting
to connect Sensors to the Receiver. (pg.17 )
All alarm operation is temporarily totally disabled during this test. (pg.51)
There is no automatic link between this menu entry and the units selected in the
Engineering Units menu (refer to section 4.4.2.1.2) or the range selected in the
Sensor Type menu. The operator must be careful to select a level value entry that
is within the instrument’s operating range, otherwise the alarms will not operate.
(pg.53)

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SPECIFIC After making Sensor/Transmitter electrical connections, care must be taken to replace the
CAUTIONS Sensor/Transmitter wiring box cover properly. The wiring box is not perfectly square (refer to
Figure 2-2) and the cover must be aligned properly to the box in order for the gasket to seal
the box properly. (pg.17)
In SETUP, ALARM, and DATA modes, gas monitoring continues to take place even though
concentration values are not shown on the display. However, when in SETUP, selection of
CALIBRATE, SELF-TEST, or SENSOR-CHECK functions will temporarily suspend normal gas
monitoring. (pg.24)
When power is restored after a power failure, displayed averages will be reset and valid data
will not be available until 15 minutes or 8 hours have been accumulated for the STEL and TWA
modes respectively. (pg.30)
Averaging data will be accumulated from the time the RUN CALIBRATION key is pressed until
the calibration process is actually begun by activating the Sensor’s magnetic switch. Once
Calibration has been activated, data accumulation is suspended until Calibration is completed.
Data accumulation is suspended during SENSOR CHECK, CALIBRATION (begins when the
sensors magnetic switch is activated) and SELF-TEST. (pg.30)
If the measured gas concentration exceeds the maximum range, the data will be accumulated
at the maximum range rate. The average data after the over-range event will be in error for
the next averaging period. The over-range event is displayed and may also be retrieved from
the data archive. If the instrument is set up such that alarm level 3 is at the maximum range,
remote notification of this type of occurrence is possible. (pg.30)
The value of the gas concentration entered must be within the range selected from the SENSOR
TYPE menu (refer to section 4.4.2.2.2), otherwise an erroneous operation will result. (pg.55)
If cleaning of the sensor housing is performed, do not clean the Sensor/Transmitting housing
with cleaners containing strong mineral acids or organic solvents such as ketones, chlorinated
hydrocarbons, or aromatics. Using such cleaners may damage the housing materials. Cleaning
of the sensor housing materials should only be performed using soap and water. (pg.81)
Sensor removal must be done by pulling the sensor from the circuit board without rotating or
twisting the sensor. Rotation will cause serious damage to the sensor pins. (pg.82)
READ FIRST
WARNING
INSTRUCTION MANUALS
Do not install, maintain, or operate this equipment without reading, understanding and
following the proper De Nora Water Technologies instructions and manuals, otherwise
injury or damage may result.
RETURN OF EQUIPMENT
All equipment being returned to De Nora Water Technologies for repair must be
free of any hazardous materials. Contact De Nora Water Technologies for authorization
prior to returning equipment.
This instruction bulletin contains general operating information about the Chloralert™ Plus Multi-Gas Detector as well
as instructions for installation and troubleshooting.
Read these instructions before starting installation.
Save these instructions for future reference.

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1.0 INTRODUCTION
1.1 General
The Chloralert™ Plus multifunction gas-leak detector is designed to be used for the detection and monitoring of
Chlorine (Cl2) and Sulfur Dioxide (SO2) in ambient air. It also activates audio and visual alarms in the event that the
concentration of these gases exceeds programmable preset levels. The basic system consists of the Receiver
and one to four Sensor/Transmitters and has provision for additional optional features (refer to Figure 1-1). In use,
the sensor assemblies are mounted near the potential sources of leaks or emissions. The receiver assembly may
be located up to 1000 ft from the sensor. It converts the signal from the sensor/transmitter to the digital display of
gas concentration, activates alarm(s) or other safety devices, transmits 4-20 mA signals for recording or control
purposes, and permits serial communication via RS485 or RS232 protocols.
The receiver is available as a wall mounted, NEMA 4X enclosure 10.9W x 8.6H x 5.3 inches deep containing a main
circuit board, keyboard, and display. The electronics consist of a power supply and signal-processing circuitry
for up to four sensor inputs, battery charging circuit for an optional external battery back-up, a malfunction relay
and two alarm relays. Support for three separate optional electronics packages is included on the main board:
Communications (RS232 or RS485), 4 channels of 4-20 mA analog outputs, and six additional digital output relays
(SPST). All relays are rated at 1.5/240VAC.
The receiver is supplied with three conduit connectors for sensor, replay, and ac power connections. An additional
four conduit connectors for optional accessories are supplied in a separate bag.
The sensor includes dedicated transmitter electronics because of individual sensor setup requirements and is
currently available in four types (Cl2& SO2). A waterproof package (NEMA 4X) consists of a factory-calibrated
assembly containing sensor and solid state electronics. The sensors are powered from the receiver which will
power 4 sensors for a minimum of 24 hours during a power outage when supplied with the optional back-up bat-
tery. Appropriate cable lengths may be ordered separately.
A sensor-check (auto-generator) feature is available for each sensor type. It consists of a small gas generator
which is assembled on the end of the sensor and is wired in the junction box assembly. This allows testing of the
sensor’s integrity and verifies that the sensor is functioning properly.
Figure 1-1 Basic System Configuration

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1.2 Model Number Breakdown
The following table shows the individual fields of the instrument’s model number and the selections
available for each. Refer to the receiver’s data tag (shown below) for the specific model number
configuration of the instrument.
17CA3
Enclosure
Standard Wall Mounting 1
Standard With key Locked door 2
Analog Outputs
None 0
4 ANO 1
Digital Outputs
3 DO 0
9 DO 1
Design Level A
Communications
None 0
RS485 1
RS232 2
Sensor Channel - Calibrated with Detector*
Not Required 0 0 0 0
Chlorine Sensor - (0-5 PPM) 1 1 1 1
Chlorine Sensor - (0-10 PPM) 2 2 2 2
Chlorine Sensor - (0-50 PPM) 3 3 3 3
Chlorine Sensor with Sensor Check - (0-5 PPM) 4 4 4 4
Chlorine Sensor with Sensor Check - (0-10 PPM) 5 5 5 5
Chlorine Sensor with Sensor Check - (0-50 PPM) 6 6 6 6
Sulfur Dioxide Sensor - (0-10 PPM) 7 7 7 7
Sulfur Dioxide Sensor - (0-20 PPM) 8 8 8 8
Sulfur Dioxide Sensor - (0-100 PPM) 9 9 9 9
* Specify type and quantity of sensor(s) required (4 maximum)

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1.3 Specifications
SYSTEM:
Gases Chlorine
Sulfur Dioxide
Channels/Gases 4 max., channels and gas interchangeable
for each receiver
Gas Conc. Ranges Chlorine: 0-5, 0-10, 0-50 ppm
Sulfur Dioxide: 0-10, 0-20, 0-100 ppm
Ambient Temperature Receiver: -5 to +55°C (23 to 131°F)
Sensor: -30 to +55°C (-22 to 131°F)
Ambient Pressure: 0.8 to 1.2 atmospheres
AC POWER:
Voltage Range 93.5 to 276 Vac
Frequency Range 47-63 Hz
Power Consumption Receiver- 10 watts nominal, 12 watts max.
Electrochemical Sensor/Transmitter- 0.5 watts max.
Voltage Dropout Duration < 20 ms
Permitted
RECEIVER:
Signal Digital Communication
RS 232/485 (optional),
4-20 mA each channel (optional)
Relays 3 SPDT Standard, Additional 6 SPST optional
Relay contacts rated at 3.15 Amps/240 Vac
Optional relays are field replaceable
Annunciators Flashing display indication for concentration alarms and other
significant events. Display backlight turned off during battery
operation or if battery is faulty.
Alarm Levels Selectable, 3 programmable concentration alarm levels
for each channel.
Alarm Modes Selectable, TWA, Instantaneous, STEL, and Customer Defined
Alarm Operation Selectable, normal (self-resetting), latched and delayed.
Display Back-lit LCD, 2 lines x 20 characters
Keyboard Polyester, 20 tactile key position
Diagnostics System, power and sensor failure
Security Password-protected

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Max. Distance Receiver to
Sensor/Transmitter: 1000 ft.
Wires (Xmttr/Receiver) 2
Sample Draw None
Sensor Check Optional
Housing
Sensor/Transmitter:
Dimensions: 3.2 in.(W) x 11.0 in.(H)* x 2.2 in.(D)
*12.6 in.(H) with gas-generator
Weight: 1 lb.
Materials: Electronic Housing Tube-PVC
Junction Box-polycarbonate
Receiver:
Dimensions: 10.9 in.(W) x 8.6 in.(H) x 5.3 in.(D)
Weight: 5 lb.
Materials: Enclosure-polystyrene
Clear Front-polycarbonate
Battery:
Dimensions: 10.5 in.(W) x 9.0 in.(H) x 6.5 in.(D)
Weight: 15 lb.
Mounting: Wall
ENCLOSURES: NEMA 4X(IP65)
OPTIONS:
4 ANO Option Contains circuitry for transmitting four 0-20 mA or 4-20 mA analog
current outputs proportional to gas concentration levels. The analog
outputs are not isolated since they all share the same “circuit
common” return point (Refer to Figure 2-4).
6 DO Option Contains six additional SPST relay circuits, thus allowing for two
relays for each gas channel.
Communications Plug-in models for RS232 or RS485
ACCESSORIES:
External Battery Includes battery (w/storage case) allowing a minimum of 24 hours
of operation
Sensor Cable Available in any length (in feet) up to 1000 ft. max.
Sensor-Check Generators Attach to end of sensor. Discharge gas into the sensor to verify
sensor and receiver operation. Controlled by the Receiver.
SENSOR:
Sensor Type Electrochemical (EC)
Minimum Detectable Chlorine: 0.1 ppm
Concentration Sulfur Dioxide: 0.1 ppm
Calibration Mode automatic, remote single person, non-intrusive

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2.0 INSTALLATION
2.1 Inspection
The equipment should be inspected for damage that may have occurred during shipment. All damage should
be reported to the shipping agent. If the equipment is damaged to the extent that faulty operation may result,
contact De Nora Water Technologies before installation. Always reference the complete instrument serial
number and model number in all correspondence concerning the equipment supplied.
2.2 Location and Mounting
The Model 17CA3000 Chloralert™ Plus Receiver may be wall-mounted close to the gas sensor(s) or may be
located up to 1000 feet from the sensor(s). Refer to Figure 2-3 for the recommended interconnection diagram.
Mounting-ears are supplied with the Receiver and the Sensor/Transmitter and may be used for convenient
wall-mounting (Refer to Figures 2-1 and 2-2 respectively). The mounting ears may be oriented in several
directions to facilitate convenient mounting. It is recommended that both receiver and sensor/transmitter
be oriented vertically as shown in Figure 1-1. Mounting screws or any other mounting hardware desired or
required is supplied by the customer.
The receiver case is supplied, configured with three ½-NPT conduit fittings for customer wiring (Refer to
Figure 2-1). The receiver enclosure contains four additional knockouts for attachment of additional conduit
fittings. These provide a means of wiring optional features like digital communications, analog outputs, battery
backup and alarms.
Select a location which gives limited access to unauthorized personnel and where ambient temperature remains
within the temperature range specified in section 1.3. The installation area should be well
ventilated and provided with a source of heat, if necessary, to ensure that the ambient temperature does not
fall below the specified minimum temperature.
The selected location must be of sufficient size to provide necessary equipment clearances and to allow easy
access for routine inspection and maintenance of the Chloralert Plus Receiver and its gas sensor/transmitters.
Refer to Figures 2-1 and 2-2 for outline dimensions of the Chloralert™ Plus Receiver and Sensor/Transmitter
Assembly respectively.
Locate the sensor module 12" to 36" (305 to 915 mm) from the floor with the sensor pointed downward.
2.3 Receiver Electrical Connections
Electrical wiring including AC power, sensor and alarm relay interconnections should be performed in
accordance with the interconnection diagram shown in Figure 2-3. Refer to section 2.4 for detailed sensor/
transmitter assembly wiring.
WARNING
ELECTRICAL SHOCK HAZARD. Equipment powered by AC line voltage
presents a potential electric shock hazard to the user. Servicing of the
Chloralert Plus should only be attempted by a qualified electronics technician.

325.6610.17 - 14 -
Figure 2-1 Receiver Outline Dimensions

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Figure 2-2 Sensor/Transmitter Outline Dimensions

325.6610.17 - 16 -
Figure 2-3 Interconnection Diagram

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Although the above table shows recommended wiring, a sensor may be wired to any CHANNEL as long as
the configured CHANNEL corresponds to the terminals to which the sensor is wired. For example, a single
sensor may be wired to the S3+ AND S3- terminals as long as the CHANNEL 3 is configured for that sensor
in the configuration menu. Wiring a sensor to S2+ and S2- terminals and configuring CHANNEL 1 will cause
a sensor alarm to be generated.
CAUTION
After making sensor/transmitter electrical connections, care must be
taken to replace the sensor/transmitter wiring box cover properly. The wiring
box is not perfectly square (refer to Figure 2-2) and the cover must be aligned
properly to the box for the gasket to seal the box properly.
2.4 Sensor/Transmitter Electrical Connections
WARNING
ELECTRICAL SHOCK HAZARD. Equipment powered by AC line
voltage presents a potential electrical shock hazard to the user.
Make certain that the system input and digital output relay connections
are disconnected from the operating branch circuit branch circuit before
attempting to connect sensors to the receiver.
Precautions must be taken to insure that the sensor/transmitter assembly is correctly wired to the receiver. The
sensor/transmitter assembly interfaces with the receiver circuitry via the sensor interface, terminal block TB3.
This terminal block consists of 12-positions organized into 3 terminals for each of the four possible sensors.
Each sensor is wired to a S+, S- and SHD (shield) terminal.
Sensor wiring for the Chlorine Electrochemical Sensor is shown in Figure 2-4. The example shown in the figure
shows a single sensor wired to terminals S1+ and S1- on TB3. These terminals correspond to CHANNEL 1 in the
SETUP-CONFIGURATION-CHANNELS menu selection discussed in chapter 4.0, START-UP AND OPERATION.
For a single-sensor system, it is recommended that the sensor be connected to the S1+ and S1- terminals and
that it be configured as CHANNEL 1 in the firmware. The sensor wires are polarized and the RED wire must
be connected to the “+” terminal while the BLACK wire connects to the “-“ terminal. As mentioned previously,
the figure shows wiring for a single-sensor system. If additional sensors are being used, the suggested wiring
configuration is shown in Table 2-1 below.
Table 2-1 Sensor Wiring and Configuration
Number of Sensors Sensor Terminals Channel
1 1 S1+, S1 1
2 1
2
S1+, S1-
S2+, S2-
1
2
31
2
3
S1+, S1-
S2+, S2-
S3+, S3-
1
2
3
4 1
2
3
4
S1+, S1-
S2+, S2-
S3+, S3-
S4+, S4-
1
2
3
4
WARNING
Calibrated Sensors are calibrated to a specific channel on the
gas detector and are required to be wired as such

325.6610.17 - 18 -
Figure 2-4 Sensor Wiring

- 19 - 325.6610.17
3.0 FUNCTIONAL DESCRIPTION
3.1 General
The 17CA3000 Chloralert Plus normally consists of two distinct elements, the sensor/transmitter and the receiver.
The sensor/transmitter is located near potential sources of gas leaks or emissions while the receiver is located
remotely in a control room, although in some instances, they may both be located at the same site.
Both elements of the device have inputs and outputs. The sensor/transmitter is powered by the receiver to
operate the electronics as well as the sensor, it transmits a multiplexed frequency-modulated (FM) signal to
the receiver. This conditioned sensor signal is a function of the gas concentration being monitored by the
sensor. The receiver accepts the sensor/transmitter input, converts it to a display of the gas concentration,
activates alarms and other safety devices, and transmits an analog output current signal (if so configured) for
recording or control purposes. Additionally, setup and configuration data are available via an optional remote
serial data communications port. The receiver may also receive information such as that needed for a set up
and calibration from an external computer via this datalink (Refer to section 6.0).
The receiver is also used to set up the database for the various alarm functions and the required calibration
information. Several alarm modes are available; Instantaneous, STEL, TWA, or Custom. It also provides
information during the calibration procedure about the status of the calibration as it proceeds.
The main board in the receiver contains the power supply for all sensor/transmitters, the microprocessor, three
(standard) programmable alarm relays and associated electronics. Four optional features are available:
• Four 0-20 mA or 4-20 mA ANALOG OUTPUTS for transmission of the gas
concentration levels.
• Six additional DIGITAL OUTPUT relays
• RS232 or RS485 Communications Port
• Battery Backup
The purpose of this chapter is to give an overview of some of the features of the 17CA3000. For actual
operational and data-entry procedure, refer to section 4.0.
3.2 Features
3.2.1 Sensor/Transmitter
3.2.1.1 Gases
Presently, the system is designed to monitor two gases:
• Chlorine
• Sulfur Dioxide
3.2.1.2 Gas Concentration Range
The Chloralert™ Plus uses frequency to transmit the sensor/transmitter information to the
receiver. The accuracy for any given concentration is then determined by the concentration
used for calibration.

325.6610.17 - 20 -
3.2.1.3 Outputs
The output of the sensor/transmitter is wired directly to a terminal block in the receiver so care
should be taken that the sensor is correctly connected to the receiver (refer to section 2.4). If
the sensor/transmitter is connected incorrectly, no damage will occur but the LED indicator on
the sensor/transmitter will not light and the LCD display on the receiver will indicate “BAD ID”.
The output of the sensor/transmitter consists of two multiplexed frequencies which provide
information for ambient temperature and sensed gas concentration. Refer to section 7.4.2 for
additional information.
3.2.1.4 Power Consumption
Nominal power requirement for the sensor/transmitter is approximately 0.5 watts per
individual sensor.
3.2.1.5 Sensor Cross-Sensitivity
The sensor may also be responsive to gases in sampled air other than the target gas. The
degree of the sensitivity may cause an error in the concentration reading of the target gas.
Table 3-1 below shows the typical concentration errors to be expected when a chlorine sensor
is exposed to the indicated concentrations of “interference” gases.
Table 3-1 Gas Cross-Sensitivity Data
Sensor response to an instantaneous change of 50% relative humidity would be a chlorine
equivalent of approximately +/-0.5 ppm lasting for 2 minutes with no permanent effect. Longer-
term changes in relative humidity (>5 minutes) have no effect.
3.2.2 Receiver
3.2.2.1 Input Voltage
The receiver is designed to operate on any voltage between 93.5 and 276 Vac without the
need for the customer to make adjustments should he decide to change voltage sources.
The sensor/transmitter is powered by the receiver.
3.2.2.2 Power Requirements
Overall system power requirements range from 10 to 14 watts and varies depending on which
system features are activated. Optional backup power is available to provide power during
AC power losses. Battery life is at least 24 hours with all sensors and options active. Battery
charge is automatically maintained by the receiver and no operator intervention is required.
Gas Concentration
(ppm)
CF Equivalent
(ppm)
Carbon Monoxide 300 0
Hydrogen Sulphide 15 approx. -0.5
Sulphur Dioxide 5 0
Nitric Dioxide 35 0
Nitrogen Dioxide 5 approx. 5
Hydrogen 100 0
Hydrogen Cyanide 10 0
Hydrogen Chloride 5 0
Ethylene 100 0