Vaisala HMP155 - Manual (Page 39)

Chapter 4 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 37
System Commands
The commands introduced in this section are used for setting the filtering
level, checking the probe configuration, listing available commands and
possible error messages, and displaying the software information of the
probe.
FILT [0.1…1]
Use the FILT [xxx] serial line command to set the filtering level. The
default setting is 1. The output is calculated based on the following
formula: [( new result * filt) + ( old result * (1.0 - filt))]. This means that
with FILT value 1 the probe will take only the latest measurement into
account, but with FILT value 0.1 a new output is a combination of the
previous output (90%) and the latest measurement (10%).
FILT [xxx]
where
xxx = 0.1…1 where 1.0 = no filter and 0.1 = about 16 moving average
Example:
>filt
Filter : 0.800 ?
>