User Interface Commands
4-18 FOT Lab Kit User’s Manual
SM Samples per Measurement
The SM command is used to specify the number of ADC samples
that will be averaged to create each measurement reported. Fewer
samples mean faster response, more samples mean greater stability.
The FOT Lab Kit’s internal timing is based upon a fixed 4Hz
sampling rate. The number of samples per second per channel is
4Hz divided by the number of active channels.
The Samples-per-Measurement command specifies the number of
samples retained per channel which are then averaged to generate
the temperature report. To put it another way, the specified number
of samples will be averaged and used to create the temperature
value to be reported.
NOTE Please note also that the measurement update rate (MU
command) has an impact upon averaging in that it determines the
degree to which averaging occurs across measurements.
Examples: In the first example only one input channel is active so
all samples taken are for that channel. Each report (except the first)
will include 8 samples. In the second example four channels are
active so the samples taken are distributed evenly among the active
channels. Each report (except the first) will then include 2 samples
per channel.
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