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

This 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. The <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 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 <ROLL>
key to change the value and <SAVE> to save.
The factory default is 2000 ppm.
<MENU>
2. Altitude The default is 0 feet. Change by using the
<ROLL> key from 0 to 5000 feet in 500 ft
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 drift 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 This 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. The
factory default is Enable.
<MENU>
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
normal operation or <MENU> to repeat the
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