Page 1
®
SENSAPHONE
REMOTE MONITORING SOLUTIONS
SENSAPHONE CARBON DIOXIDE (CO2) SENSOR • FGD-0068
Quick Installation Instructions
e Sensaphone Carbon Dioxide (CO2) sensor will allow you to monitor levels of Carbon Dioxide from 0-2000ppm with any
Sensaphone that will accept a 4-20 Input signal. e FGD-0068 will require a 24VDC power supply to operate (Part No: FGD-0052).
Note on wiring: Use 22AWG shielded wiring for all connections (Sensaphone Part No. FGD-0010) and do not locate the device wires in
the same conduit with wiring used to supply inductive loads such as motors. Disconnect the power supply before making any connections to prevent electrical shock or equipment damage. Make all connections in accordance with national and local codes.
Described below is the correct way to wire your Carbon Dioxide (CO2) Sensor to your Sensaphone.
1. Remove the cover.
2. Verify the switch in the upper le corner on the sensor is in the “OUTPUT mA” position.
3. Route the wires through the hole in the center of the circuit board.
4. Connect the 24VDC Power Supply Positive (+) to the terminal marked PWR.
5. Connect the 24VDC Power Supply Negative (-) to the Sensaphone Zone Negative (-)
6. Connect the Sensaphone Zone Negative (-) to the terminal marked COM.
7. Connect a wire from the CO2 terminal to the Sensaphone Zone (+) positive terminal.
8. Replace the cover.
9. Program the Sensaphone zone (input) for a 4-20mA sensor type with a table range of 0-2,000.
Sensaphone • 901 Tryens Road • Aston, Pa 19014 • Ph: 877-373-2700 F: 610-558-0222 • Lit-0153 06/13
CO2 calibration ports
Sensaphone
Terminal Block
+ –
24VDC
Power
+ –
Page 2
Sensaphone FGD-0068 Carbon Dioxide (CO2) Sensor
Installation Instructions and Specifications
Introduction
e CO2 transmitter uses Infrared Technology to monitor CO2
levels within a range of 0 – 2000 ppm and outputs a linear 4-20
mA signal. Features include a back-lit LCD and user menu for
easy installation
Before Installation
Read these instructions carefully before installing and commissioning the CO2 transmitter. Failure to follow these instructions
may result in product damage. Do not use in an explosive or
hazardous environment, with combustible or ammable gases,
as a safety or emergency stop device or in any other application
where failure of the product could result in personal injury. Take
electrostatic discharge precautions during installation and do not
exceed the device ratings.
Mounting
e room type sensor installs directly on a standard electrical
box and should be mounted ve feet from the oor of the area
to be controlled. Do not mount the sensor near doors, opening
windows, supply air diusers or other known air disturbances.
Avoid areas where the detector is exposed to vibrations or rapid
temperature changes.
e cover is hooked to the base at the top edge and must be
removed from the bottom edge rst. Use a small screwdriver to
carefully pry each bottom corner if necessary. If a security screw
is installed on the bottom edge, then it may have to be loosened or
removed also. Tip the cover away from the base and sit it aside.
e pcb must be removed from
the base to access the mounting
holes. Follow usual anti-static
procedures when handling the
pcb and be careful not to touch
the sensors. e pcb is removed
by pressing the enclosure base to unsnap the latch near the
bottom edge, then the pcb can be lied out of the base. Sit the pcb
aside until the base is mounted on the wall.
Aer the base is screwed to an electrical box or the wall using
the appropriate holes, pull the wires through the wiring hole in
the center of the pcb and then reinstall it in the enclosure base.
Ensure the pcb is snapped into the base securely and correctly.
e mounting hole locations are shown in the following drawing.
Start Up
Verify the transmitter is properly wired and connections are tight.
Ensure the output switch is set for mA. Apply power and note that
the CO2 sensor chamber light ashes on and o. e LCD will
indicate the soware version number, the output signal type, the
CO2 measurement range and then the sensor will begin reading
the CO2 level, output the correct analog signal and display the
value on the LCD. e sensor operates on a 4 second interval and
will update the output and display every 4 seconds.
Output
e CO2 output is scaled such that 4-20mA equals 0 to Out_High
as set in the Setup Menu. e factory default is 0-2000 ppm.
Out_High can be changed from 1000 to 7500 ppm and the output
signal is scaled accordingly.
Calibration
Calibration with gas requires a eld calibration kit consisting of
an LCD, a bottle of 1000 ppm CO2 gas, a tank pressure regulator
with ow restrictor and the necessary tubing to connect to the
device.
Note that because of the Automatic Calibration Mode and other
technology incorporated into this sensor, only a single point 1000
ppm calibration is required to meet specied accuracy.
Turn the regulator on/o knob fully o and attach it to the 1000
ppm CO2 gas bottle and rmly tighten it by hand. Remove the
cover of the unit to be calibrated to expose the gas sensor chamber. e tubing from the gas bottle can be connected to either port
on the chamber aer the plastic cap is removed. Gently remove
one cap and connect the tubing, note that strong shock or vibration can aect calibration.
Ensure the device has been operating normally for at least ve
minutes before applying gas. Slowly turn the valve knob on the
regulator to let the gas begin owing.
e regulator will restrict the ow rate to the specied 100 ml/
min. Aer a brief period the gas will ow into the chamber and
the CO2 reading on the LCD will begin to approach 1000 ppm.
Wait 1 to 2 minutes until the CO2 reading stabilizes.
Enter the Setup menu and use the <MENU> key to advance to
Calibrat 1000 PPM. Press and hold the <SAVE> key for 2 seconds
and the display will change to Waiting Calibrat then to Waiting 5
minute to indicate that the process of reprogramming the internal
calibration setting is taking place.
is calibration process takes about 5 minutes and the LCD will
count down the minutes. Do not disturb the unit or the gas ow
during this period. When calibration is complete the unit will
display Calibrat Done. Press the <SAVE> key to return to normal
operation and then the gas can be shut o.
Disconnect the tubing and replace the cap on the sensor chamber
as calibration is complete.
Setup Menu
e menu has several items as shown below. To enter the menu,
press and release the <MENU> key while in normal operation.
Page 3
is will enter the SETUP menu step 1, pressing the <MENU>
key a second time advances to step 2. Each press of the <MENU>
key advances the menu item. No values are saved or changed
by using the <MENU> key. e <ROLL> key is used to make
changes to program variables by scrolling through the available
options. When a value is changed, use the <SAVE> key to save it
to memory and advance to the next menu item.
<MENU> Press and release the <MENU> key to enter the SETUP
menu.
1. Out High e default CO2 range is 0-2000 ppm. e
span can be changed from 1000 to 7500 ppm in
increments of 2000 ppm 500. Use the <ROLL>
key to change the value and <SAVE> to save.
e factory default is 2000 ppm.
<MENU>
2. Altitude e default is 0 feet. Change by using the
<ROLL> key from 0 to 5000 feet in 500
increments. Change 0 Ft for CO2 local altitude
correction and press <SAVE> to save a change.
<MENU>
3. Auto Cal Automatic Cal Mode default is ON to correct
CO2 sensor dri to better than ± 10 ppm per
year. Change ON with the <ROLL> key and
save using <SAVE>. ON is recommended for
applications where the CO2 level will be close
to normal (400 ppm) at least once per day. If a
building is occupied 24 hours and the CO2 level
is fairly constant then this should be set to OFF.
<MENU>
4. Output Use the <ROLL> key to toggle the output OFF
(normal operation), MIN (minimum output) or
MAX Test OFF (maximum output) for testing
purposes. Press either <SAVE> or <MENU> to
set it back to OFF and advance to the next item.
<MENU>
5. Calibrat is item is used for 1000 ppm gas calibration
and is explained in the Calibration section.
1000 PPM
<MENU>
6. BackLite Use the <ROLL> key to enable or disable the
LCD backlight. When enabled the backlight is
always on, Enable when disabled it never lights.
Press the <SAVE> key to save the setting. e
factory default is Enable.
<MENU>
normal operation or <MENU> to repeat the
menu.
General Specications
Power Supply . . . . . . . . . . . . 20 – 28 Vac/dc (non-isolated half-
wave rectied)
Consumption . . . . . . . . . . . . 100 mA max @ 24 Vdc, 185 mA max
@ 24 Vac (with all options)
Output Signals . . . . . . . . . . . 4-20 mA active (sourcing), 0-5 Vdc
or 0-10 Vdc (eld selectable)
Output Drive Capability . . . 550 ohms maximum for current out-
put, 10 Kohm min for voltage output
Output Resolution . . . . . . . . 10 bit PWM
Protection Circuitry . . . . . . . Reverse voltage protected, overvolt-
age protected
Operating Conditions . . . . . 0-50 °C (32-122 °F), 0-95 %RH
non-condensing
Wiring Connections . . . . . . Screw terminal block (14 to 22 AWG)
Sensor Coverage Area . . . . . 100 m2 (1000 2) typical
Enclosure . . . . . . . . . . . . . . . Wall mount enclosure, 3.3”w x 4.7”h
x 1.15”d (84 x 119 x 29 mm)
CO2 Signal
Measurement Type . . . . . . . Non-Dispersive Infrared (NDIR),
diusion sampling
Measurement Range . . . . . . 0-2000 ppm standard, programmable
up to 7500 ppm
Standard Accuracy . . . . . . . . ± 75 ppm @ 1000 ppm @ 22 °C (72
°F) compared to certied calibration
gas
Temperature Dependence . . 0.2 %FS per °C
Stability . . . . . . . . . . . . . . . . . < 2 %FS over life of sensor (15 year
typical)
Pressure Dependence . . . . . . 0.13 % of reading per mm Hg
Altitude Correction . . . . . . . Programmable from 0-5000 via
keypad
Response Time . . . . . . . . . . . < 2 minutes for 90 % step change
typical
Warm-up Time . . . . . . . . . . . < 2 minutes
LCD Display
Resolution . . . . . . . . . . . . . . . 1 ppm CO2
Size . . . . . . . . . . . . . . . . . . . . . 1.4” w x 0.6” h (35 x 15 mm) alpha-
numeric 2 line x 8 characters
Backlight . . . . . . . . . . . . . . . . Enable or disable via keypad
7. Restore Press the <SAVE> key to restore all factory
defaults and calibration to original factory
settings.
<MENU>
8. Menu Press <SAVE> to exit the menu and return to
Loading...