20 RPT 301 User ManualK177 Issue No. 3
F - Filter Set-up
This command sets the instrument reading filter coefficients.
Command: F, step, average
Where: step is a pressure band within which the filter operates.
If the pressure steps outside this band, the filter is
bypassed. This gives an unfiltered response to
non-noise step changes.
step takes a value expressed as a percentage (0 -
100%) of full-scale.
If step = 0 then the filter is disabled.
average is the number of sequential readings (1 -
99) averaged by the filter. High values effectively
give the filter a long time-constant.
Reply: None
B - Set Resolution
This command enables the decimal place of the reading to be adjusted
within the instrument’s resolution, see specification. The reading
resolution is automatically selected according to the instrument full-
scale and the units that have been selected using the units set-up
command. An algorithm is used that gives a resolution which does not
interfere with the accuracy of measurement and is as noise-free as
possible before filtering. The set resolution command allows the
number of decimal places of the transmitted value to be specified, this
overrides the automatic selection of resolution for the current selected
units.
Changing units cancels any previous set resolution command.
The command is nonvolatile and remains selected until the units are
changed. Changing and restoring the units can be used to cancel the
set resolution command.
Command: B,n
Reply: None
Result: Sets the transmitted number of decimal places to be ‘n’ 0-5
max depends on units resolution.