CDD4 Duct Carbon Dioxide Transmitter
Installation Manual
May 27, 2013
5
This item is omitted if the 2000 ppm sensor is installed
9.
Calibrat
This item is used for 0 ppm gas calibration and is explained in the
Calibration
section.
0 PPM
<MENU>
10.
Calibrat
This item is used for 1000 ppm gas calibration and is explained in the
Calibration
section.
1000 PPM
<MENU>
This item is omitted if the 2000 ppm sensor is installed
11.
Calibrat
This item is used for 20,000 ppm gas calibration and is explained in the
Calibration
section.
20000 PPM
<MENU>
12.
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>
13.
Menu
Press <SAVE> to exit the menu and return to normal operation or <MENU> to repeat the menu.
Exit
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 output, 5 Kohm min for voltage output
Output Resolution . . . . . . . . . . 10 bit PWM
Input Voltage Effect . . . . . . . . Negligible over specified operating range
Protection Circuitry . . . . . . . . . Reverse voltage protected, overvoltage protected
Operating Conditions . . . . . . . 0-50
C (32-122
F), 0-95 %RH non-condensing
Wiring Connections . . . . . . . . Screw terminal block (14 to 22 AWG)
Enclosure . . . . . . . . . . . . . . . .
5.7”w x 3.95”h x 2.5”d (145 x 100 x 63 mm)
Duct Probe . . . . . . . . . . . . . . .
7” (177 mm) long x 1” (25.4 mm) diameter
CO2 Signal
Measurement Type . . . . . . . . . Non-Dispersive Infrared (NDIR), diffusion sampling
Measurement Range . . . . . . . . 0-2000 ppm (CDD4A) or 0-20,000 ppm (CDD4B), programmable span
Standard Accuracy . . . . . . . . .
30 ppm + 3% of reading (CDD4A with Auto Cal)
75 ppm or 10% of reading (whichever is greater) (CDD4B with dual-channel sensor)
Temperature Dependence . . . . 0.2 %FS per
C
Stability . . . . . . . . . . . . . . . . . . < 2 %FS over life of sensor (15 years typical) (CDD4A)
< 5 %FS or <10% reading annual (CDD4B)
Pressure Dependence . . . . . . . 0.135 % 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
DISC
ONTINUED
