Sensaphone fgd-0068 CARBON CO2 SENSOR - Manual (Page 3)

This will enter the SETUP menu step 1, pressing the
key a second time advances to step 2. Each press of the
key advances the menu item. No values are saved or changed
by using the
changes to program variables by scrolling through the available
options. When a value is changed, use the key to save it
to memory and advance to the next menu item.
menu.
1. Out High The default CO2 range is 0-2000 ppm. The
span can be changed from 1000 to 7500 ppm in
increments of 2000 ppm 500. Use the
key to change the value and to save.
The factory default is 2000 ppm.
2. Altitude The default is 0 feet. Change by using the
key from 0 to 5000 feet in 500 ft
increments. Change 0 Ft for CO2 local altitude
correction and press to save a change.
3. Auto Cal Automatic Cal Mode default is ON to correct
CO2 sensor drift to better than ± 10 ppm per
year. Change ON with the key and
save using . 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.
4. Output Use the key to toggle the output OFF
(normal operation), MIN (minimum output) or
MAX Test OFF (maximum output) for testing
purposes. Press either or
set it back to OFF and advance to the next item.
5. Calibrat This item is used for 1000 ppm gas calibration
and is explained in the Calibration section.
1000 PPM
6. BackLite Use the key to enable or disable the
LCD backlight. When enabled the backlight is
always on, Enable when disabled it never lights.
Press the key to save the setting. The
factory default is Enable.
7. Restore Press the key to restore all factory
defaults and calibration to original factory
settings.
8. Menu Press to exit the menu and return to
normal operation or
menu.
General Specifications
Power Supply . . . . . . . . . . . . 20 – 28 Vac/dc (non-isolated half-
wave rectified)
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 (field 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 ft2) 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),
diffusion sampling
Measurement Range . . . . . . 0-2000 ppm standard, programmable
up to 7500 ppm
Standard Accuracy . . . . . . . . ± 75 ppm @ 1000 ppm @ 22 °C (72
°F) compared to certified 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 ft 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