Thermo Scientific 42iQD, Instruction Manual

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Operation
Settings
Thermo Scientific 42iQD Instruction Manual 3-69
The Averaging Time screen allows the user to choose dynamic filter or a
manually selected (static) averaging time.
The following screens are shown in single range mode and dual or auto
range mode. In the dual and auto range modes, both the “High Range” or
“Low Range ” averaging buttons will be available.
Averaging Time defines the time period (1 to 300 seconds) during which
NO
x
measurements are taken. The average concentration of the readings
are calculated for that time period. The front panel display and analog
outputs are updated every 10 seconds for averaging times between 10 and
300 seconds. For averaging times of 1, 2, and 5 seconds, the front panel
display and analog outputs are updated every second. An averaging time of
10 seconds, for example, means that the average concentration of the last
10 seconds will be displayed every 10 seconds. An averaging time of 300
seconds means that the moving average concentration of the last 300
seconds will be the output at each update. Therefore, the lower the
averaging time the faster the front panel display and analog outputs
respond to concentration changes. Longer averaging times are typically
used to smooth output data.
Dynamic Filtering allows for data smoothing without compromising
response time. Automatically changes the averaging time giving the user
faster response times when conditions are rapidly changing; smoother and
stable readings, when conditions aren’t changing as rapidly; and as an
added bonus, it better processes spikes to minimize their impact on the
data. At the same time it will preserve the representative nature of the
filtered data to the conditions being sampled.
Note
When Dynamic Filtering is selected, the user selected Averaging
Time button is disabled.
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Averaging Time