NDD Series - NO2 Transmitter
Installation Manual
Feb 2, 2016
NDD-INS-002
Page 4
Common Specifications
Measurement . . . . . . . . . . . . . . . . . Electrochemical
Sample Method . . . . . . . . . . . . . . . Diffusion
Measurement Range . . . . . . . . . . . 0-10 ppm
Accuracy . . . . . . . . . . . . . . . . . . . .
0.2 ppm or
5% of reading (whichever is greater)
Sensor Life Expectancy . . . . . . . . . > 2 years
Operating Temperature . . . . . . . . . -20-50
C (-4 -122
F),
Operating Humidity . . . . . . . . . . . . 15-90 %RH (0-99% intermittent)
Pressure . . . . . . . . . . . . . . . . . . . . . Atmospheric
10%
Typical Area Coverage . . . . . . . . . 700 m
2
(7500 ft
2
) or 15 m (50 ft) radius
Calibration Adjustments . . . . . . . . Zero and Span pots
Wiring Connections . . . . . . . . . . . Screw terminal block (14 to 22 AWG)
Enclosure . . . . . . . . . . . . . . . . . . . 2.8”w x 4.1”h x 1.9”d (71 x 104 x 48 mm)
Power Supply . . . . . . . . . . . . . . . . 24 Vdc ± 20% or 24 Vac ± 10% (non-isolated half-wave rectified)
Consumption . . . . . . . . . . . . . . . . . 50 mA max
Output Signal . . . . . . . . . . . . . . . . 4-20 mA sourcing
Output Drive Capability . . . . . . . . 550 ohms max @ 24 Vac/dc
Relay Contacts . . . . . . . . . . . . . . . SPDT, Form C contacts (N.O. and N.C.), 5 Amps @ 30 Vdc
Relay Trip Point . . . . . . . . . . . . . . Low = 1 ppm, Mid = 3 ppm or High = 5 ppm, jumper selectable
Relay Hysteresis . . . . . . . . . . . . . . 3%
