Appendix 2: Technical Data - E+E Elektronik EE895 User Manual

APPENDIX 2: TECHNICAL DATA

Measurands
CO2
Measurement principle
Working range
Accuracy at 25 °C and 1013 mbar
(77 °F and 14.69 psi)
T and p compensation
of the CO reading
2
Warm-up time
Response time t
90
Temperature dependency, typ.
Residual pressure dependency
Calibration interval
3)
Sampling interval
Pressure
Working range
Accuracy at 25 °C
(77 °F),
Temperature dependency
Temperature
Working range
Accuracy at 25 °C
General
Digital interface (pin-selectable)
I²C
UART
Module control
Enable pin
Data ready pin
Supply voltage
Average current consumption
Current Profile CO
2
Electrical connection
Working and storage conditions
1) With data averaging for smooth output signal.
2) The pressure dependency of a device without pressure compensation: 0.14 % of measured value / mbar.
3) Recommended under normal operating conditions in building automation.
22
1)
2)
typ.
typ.
(77 °F),
Measurement
Dual wavelength NDIR (non-dispersive infrared technology)
0...2 000 / 5 000 / 1 0000 ppm
0...2 000 ppm < ± (50 ppm +2% of the measured value)
0...5 000 ppm < ± (50 ppm +3% of the measured value)
0...10 000 ppm < ± (100 ppm +5% of the measured value)
with on-board sensors
< 1s
105 s with measured data averaging (smooth output)
60 s without measured data averaging
± (1 + CO concentration [ppm] / 1000) ppm/°C (-20...45 °C)
2
0.014 % of the measured value / mbar (ref. to 1013 mbar)
> 5 years
from 10 s up to 1 h, user selectable; factory setup = 15s
700...1100 mbar
(10.15...15.95 psi)
± 2 mbar (20...80 % RH)
± 0.015 mbar/K
-40...60 °C
(-40...140 °F)
± 0.5 °C
(± 0.9 °F)
up to 100 kbit/s
baud rate 9600, 8 bits, no parity, 1 stop bit
Continuous operation / single shot mode
indication of valid data
3.3...5 V DC
1.5 mA (at 15 s sampling interval)
61 mA
Lamp pulse
10 mA
Warm-up
0
300 ms 300 ms
side plated contacts and solder pads
-40...60 °C
(-40...140 °F)
0...95 % RH (not condensating)
700...1100 mbar
(10.15...15.95 psi)
User Manual EE895 Miniature Sensor Module for CO
200 μA
Sleep
14.4 s
(-4...113 °F)
, T and p
2