KROHNE ALTOSONIC V12 EN - Manual (Page 136)

10
MODBUS PROTOCOL DESCRIPTION AND SET-UP
136
ALTOSONIC V12
www.krohne.com 04/2013 - 4002643502 - MA ALTOSONIC V12 R02 en
Statistics / diagnostics variables
Averages and standard deviations are calculated for a number of flow variables. The number of
measurement values that are included in this calculation are specified by means of a preset
parameter. Averages and standard deviations are evaluated and updated each time a number of
measurements equal to this parameter has been collected. Collecting data for a new block of
data to be evaluated then starts again from there.
As an exception to the rule above, for the flow standard deviation tau, the preset number of
measurement values is evaluated every time a new measurement value becomes available. The
series of measurements values then contains the most recent values and shifts with each
acquired sample (measurement data), like a running average.