OPERATION OF IAQRAE
2-14
2.8 Alarm Limits & Calibration
IAQRAE is factory calibrated with standard calibration gas, and
is programmed with default alarm limits as listed below. (See
Section 4.2 Calibration and Section 4.3 Change Alarm Limits)
Sensor
Cal Gas / Balance
Unit
Low
High
CO
2
5000 / N
2
ppm
5000
8000
VOC*
10 / Air
ppm
5.00
10
Temp
- -
-
-
RH
90/Air %RH
-
-
CO
50 / Air
ppm
35
200
H
2
S
25 / N
2
ppm
10
20
SO
2
5 / N
2
ppm
2
10
NO
25 / N
2
ppm
25
50
NO
2
5 / Air
ppm
1
10
Cl
2
10 / N
2
ppm
0.5
5
HCN
10 / N
2
ppm
4.7
50
NH
3
50 / N
2
ppm
25
50
PH
3
5 / N
2
ppm
1
2
*Note:
10 ppm isobutylene gas is used for VOC gas calibration, and may
also be used to zero calibrate the CO
2
sensor.
