MRK-D-0048 V4
Aeroqual Dust Sentry / AQS User Guide
Page | 71
Table 7: Zero calibration results
Module
Current
offset
From
monitor
settings
Reading
after
stabilisation
10 minute
average
Acceptable
reading
during zero
calibration
(ppm)
10 min
average
Acceptable
standard
deviation
during zero
calibration
(10 minute
average)
New
Calculated
offset1
Minimum
and
Maximum
recommend
ed offset
(ppm)
Offset
uploaded
Reading
after offset
changed
Pass / Fail
7.1.1
7.2.3
7.2.3 (b)
7.2.3 (c)
7.2.4
7.2.4 (b)
7.2.5
7.2.6
7.2.7
NO
2
0.000
N/A
N/A
N/A
N/A
O
3
0.0 0.005
0.002
Max +0.050
Min -0.050
Ox
0.0 0.005
0.002
Max +0.050
Min -0.050
PID
0.0 0.002
0.002
Max +0.05
Min -0.05
Comments:
Equation 4: New offset = Current (AQM gas reading / Gain)