Concoa 5803008 User manual

ADI5811-B
Certified ISO 9001
CONCOA CO2Monitor
5803008
For continuous detection and measurement of ambient carbon
dioxide concentration levels
INSTALLATION AND OPERATION INSTRUCTIONS
Before Installing or Operating, Read and Comply with TheseInstructions
Controls Corporation of America
1501HarpersRoad•VirginiaBeach,VA23454
To Order Call 1-800-225-0473 or 757-422-8330 • Fax [phone]
www.concoa.com
February 2022
Rev B

Please Read Before Installation
The following will damage the CO2Monitor.
1. The CO2monitor requires 24 VDC regulated power.
Please Do Not connect the monitor to any voltage that exceeds 24 Volts DC, or
Any AC Voltage.
2. Do not power the carbon dioxide sensor unplugged from the main PC board.
Do Not Connect the CO2sensor to the PC board while the monitor is powered.
This Will Damage the sensor.
3. The CO2cell range is matched to the electronics. Never exchange the
electronics with a CO2sensor from a different monitor.
4. When calibrating or challenging the CO2monitor,
a. Do not expose the monitor to flow rates that exceed ½ liter per minute,
(500 cc per minute) flow.
b. Expose the monitor to span gas blends that consist of Oxygen,
Nitrogen or Carbon Dioxide only. Do Not expose the monitor to
any combustible gas, i.e. Methane, Hydrogen,etc.
5. Do not expose the CO2monitor to silicone compounds. They can cause a loss
of sensitivity.
6. Do not expose the monitor to high flow air or install it directly in front of fans.
7. When using the CO2monitor, do not expose the sensor directly to a water
stream. In areas requiring wash downs, cover and protect the monitor and power
supply. Contact CONCOA for details on a waterproof enclosure.
8. Please refer to section 6.3 of this manual regarding the CO2sensor. YOU
MUST choose a calibration method before use.

Table of Contents
1: Introduction.....................................................................................................................2
1.1 Key Features........................................................................2
1.2 Component Identification....................................................3
2: Specifications..................................................................................................................7
2.1 Performance Specifications.................................................7
2.2 Gas Detection System .........................................................7
2.3 Signal Outputs.....................................................................7
2.4 Electrical Requirements ......................................................7
2.5 Physical Characteristics.......................................................7
2.6 System Default Factory Settings.........................................8
3: Installation.......................................................................................................................9
3.1 Site Requirements ...............................................................9
3.2 Mounting.............................................................................9
3.3 Wiring................................................................................10
3.4 Initial Startup.....................................................................11
4: Normal Operation..........................................................................................................12
4.1 Signal Outputs...................................................................12
4.2 Instrument Faults...............................................................12
4.3 Routine Maintenance Schedule.........................................12
4.4 Loss of Power Indicator ....................................................13
4.5 Alarm Reset.......................................................................13
5: CO2 Monitor Programming..........................................................................................14
5.1 Joystick Operation.............................................................14
5.2 Program Flowchart............................................................15
5.3 Entering the Password.......................................................19
5.4 Changing the User Password ............................................20
5.5 Entering the Menus ...........................................................23
5.5.1 Set 4-20 mA Loop....................................................23
5.5.2 Set Formats...............................................................24
5.5.3 Set Alarm Threshold Polarity...................................26
5.5.4 Set Latching..............................................................27
5.5.5 Resetting a Latching Alarm...................................... 29
5.5.6 Set Alarm Delay.......................................................29
5.5.7 Set Zero Suppression................................................30
5.5.8 Set Alarm Thresholds...............................................30
5.5.9 Set Alarm Hysteresis................................................31
5.5.10 Auto Calibrate........................................................ 33
5.5.11 Main Operation Mode............................................34
6: Maintenance & Cell Verification..................................................................................35
6.1 Sensor Calibration, CO2....................................................35
6.1.2 Adjusting the CO2Sensor Manually...................................36
7: Appendix.......................................................................................................................37
How to Connect a Horn and Strobe to the CO2 Monitor.........39
Remote Display Alarm Indicator 5803009 .............................40

2
1: Introduction
The CONCOA CO2Monitor is a compact gas monitoring system that is ideal for the continuous
monitoring of inert gas storage areas, confined spaces, and other locations where carbon dioxide levels
may pose a hazard to personnel. The patented NDIR CO2cell provides stable readings even in areas where
temperature and humidity levels are changing. The CONCOA CO2Monitor is suitable for either indoor or
outdoor use. Factory calibrated against a NIST traceable reference standard and Ce approved.
The heart of the monitoring system is an NDIR self-calibrating carbon dioxide sensor. The CO2cell
responds to high carbon dioxide conditions within seconds and provides accurate measurements over a
wide temperature and humidity range. The NDIR CO2sensor cell will operate continuously for many
years and requires an absolute minimum of maintenance. There are no zero or span calibration pots to
adjust and its built-in auto calibration can save time and money in annual maintenance.
Ideal for continuously monitoring carbon dioxide levels in confined spaces or areas where inert gases are
used, the CONCOA CO2Monitor does not drift or lose sensitivity when the weather or temperature
changes. The electronics are housed in a Nema 3 housing.
Each system consists of a long life NDIR sensor cell and three-wire transmitter. The CO2Monitor may be
used as a stand-alone gas detector, linked to optional CONCOA single and multipoint controllers, or
connected to your own centralized control and surveillance system. This manual covers the installation,
operation, and maintenance of the CO2Monitor.
1.1 Key Features
The CONCOA CO2Monitor incorporates several user-friendly features designed to simplify installation,
operation, and maintenance.
1.1.1 NDIR CO2IR Sensor
The system’s CO2sensor cell is a patented Non Dispersive Infrared, (NDIR) cell designed to detect
continuous levels of CO2. It is fast responding and has a built-in auto calibration feature that adjusts the
sensor to ambient every 180 hours.
1.1.2 Smart Electronics
The CO2Monitor incorporates a special electronic circuit that continuously monitors sensor operation.
With the addition of the alarm relay option, any cell degradation or complete failure will immediately be
detected. This smart circuitry alerts the user to sensor faults and other electrical problems that may
interrupt surveillance through the standard mA output signal or through the optional fault relay option.

3
1.2 Component Identification
1.2.1 Front View Exterior
1. Digital Display —3-digit backlit LCD digital display for showing the oxygen levels in percent.
2. Joystick —Used for selecting and adjusting the built-in menus.
3. Cable Port —This is the opening in the transmitter housing for connecting the 4-20 mA output
and 24 VDC power cable.
4. CO2Sensor—A NDIR sensor housed inside the cell protector.
5. Transmitter Cover —A removable cover that protects the interior of the transmitter.
6. Transmitter Cover Fasteners —There are 4 captive screws secure the transmitter cover in
place.
7. Electronics Fasteners —These captive screws secure the electronics to the enclosure
8. Mounting Feet —There are 4 feet used to mount the oxygen monitor to a wall or other flat
surface.
9. Alarm Indicators —3 multicolored LED indicators for showing:
Alarm level 1, CO2 Orange LED
Alarm level 2, CO2Red LED
Fault Alarm Yellow LED
5
4
9 AL 2
AL 1
Fault
8
1
2
7
6
8
3

4
1.2.2 Side View Exterior with Audio Alarm
10. Audio Horn —This built-in horn is a 90dB high pitched audio sound will activate when CO2
levels go above the selected alarm threshold. The audio alarm is non-latching and will
automatically turn off when the alarm condition clears.
NOTE:The audio alarm is an immediate alarm. Alarm levels must recover to safe levels before the
horn turns off. There is no audible alarm delay function available.
10

5
1.2.3 Side View of the CO2Sensor
1.2.4 Transmitter Interior
1. Power Analog Terminal Block —This terminal block is where the 24VDC power and 4-20 mA
analog output connection is made.
2. PTC Resettable Fuse —The PCB is protected with a PTC Fuse that is resettable and never needs
to be replaced. If it trips, you will need to turn power off to the monitor. When power resumes the
fuse will reset.
NOTE: The CO2sensor is
an NDIR type that is
continuously monitoring
ambient levels. You will
see a blinking orange LED
flash approximately
every 2 seconds. This is
normal.
The CO2sensor and sensor
cable are hard wired
directly to the main board.
1. Power
Analog output
Terminal Block
Common
Common
mA output
+ 24 VDC
+ 24 VDC
2. PTC
Resettable
Fuse

6
1.2.5 Alarm Relay Board
1.2.6 Enclosure Mounting Feet
Relay AL2 Relay AL1 Fault Relay Remote
NC C NO NC C NO NC C NO Reset
Horn Connector
Mounting Feet
can be oriented
in any direction
Feet can also be
removed for
mounting the
CO2 Monitor
flush with a wall
or other surface

7
2: Specifications
NOTE: For our continual product improvement, all specifications are subject to change without notice.
2.1 Performance Specifications Carbon Dioxide Sensor
Sensor Type: Long Life NDIR Sensor 0-50,000 ppm
Response Time: Within 1 second of any change in CO2.
Accuracy: Accuracy: ±300 ppm, ±3% of measured value
Fault Indicators: Loss of VDC power (analog signal drops to 0 mA).
Sensor cell failure: Fault relay activated (Must have Alarm relay option for cell
failure to operate).
Operating Temp: 32° to 122°F (0° to +50°C); consult CONCOA for lower or higher operating
temperatures.
Humidity: 0 to 95% RH.
Environment: Altitude 2000 m, PSU only UL spec. Pollution Degree 3, Intended for Indoor Use.
CE EN 61000-3-2:2006 EMC, EN 61000-3-3:2008 EMC, EN61010-1-3-2013 LVD
2.2 Gas Detection System
Transmitter: Microprocessor electronics with built-in 3-digit backlit LCD display
Joystick operated menus
2.3 Signal Outputs
Local Display: Digital display calibrated for Carbon Dioxide. The range is stated on the model
label and can also be accessed via the joystick on the front panel. In the
measurement mode pushing the joystick down will scroll the gas and range on the
display. Push the joystick down again to stop the scrolling and display the gas
again.
Standard Analog Output: DC 4-20 mA
Relay Output: Dual level user selectable alarm relays and one fault relay
Rated, 2amps @ 24VAC or 24VDC
2.4 Electrical Requirements
Power: 24 VDC external power. A regulated 24VDC power supply is required.
Consumption: Approximately 50mA
2.5 Physical Characteristics
Dimensions: 6.5 (W) x 3.15 (H) x 3.00 (D) inches; 165 x 80 x 76 mm (Max with feet)
Weight: 1.1 pounds (0.5 kg)
Enclosure Type: General purpose; not intended for explosive atmospheres.

8
2.6 CONCOA CO2System Default Factory Settings
The CONCOA CO2Monitor is shipped with factory defaults for the alarm relay settings. The following
are the factory defaults:
Menu Function
Factory Default
Menu Defined
Set 4-20mA loop
The mA output is set at the
factory using a calibrated
Fluke meter.
Use this function to adjust the
monitor’s 4mA, (Zero) and
20mA, (Span) to your PLC or
distributive control system.
Set Formats
LED and alarm relay
State **
Alarm 1 = Normal
Alarm 2 = Normal
Fault = Normal
Do you want the relays to
energize, (normal) or de-
energize, (fail safe) when the
alarm activates?
Set Alarm Threshold
Polarity
Alarm 1 = Normal
Alarm 2 = Normal
Audio = Not Available
Do you want to alarm at a level
higher, (normal) or lower,
(inverted) than the alarm
threshold?
Set Latching
Alarm 1 = Non-latching
Alarm 2 = Non-latching
Audio = Non-latching
Do you want the alarm to
automatically reset? (non-
latching) or do you want to
manually reset the alarm?
(latching)
Alarm Delay
Alarm = 5 seconds
Displayed as 05
How long do you want to wait
until the alarms activate?
Zero Suppression
0.0%
This function is Not Enabled
on the CO2monitor.
Set Alarm
Thresholds
Alarm 1 = 5,000 ppm
Alarm 2 = 10,000 ppm
At what level do you want to
alarm?
Set Alarm Hysteresis
Alarm 1 = 00 ppm
Alarm 2 = 00 ppm
For use when using the CO2
monitor for control of valves and
process.
Sensor Adjustment
Set CO2 Sensor span
CO2set to autocal on
CO2set to autocal off
Calibrate CO2to 400 ppm
For use when manually gas
calibrating the CO2monitor.
See Section 6.2
Manage Passwords
Factory default is 557
For use when changing the
password from factory default to
a new password of your choice.
NOTE:The built in relay settings may be changed by the user in the field. Refer to Section 5.5.2.
** NOTE: The LED indicators on the front panel are connected directly to the alarm relays.