EM100-F User Manual
0084293
Page 38 of 93
5.4. Filter Setting Commands – FM, FL, UR
FIR or IIR Filters (selected with ‘FM’ command) are provided to eliminate most unwanted
disturbances. The command ‘FL’ is used to define the filter settings, whilst the command ‘UR’ is
used to define an averaging of up to 128 measurement values. Please note that these filters are
applied immediately after the A/D converter and therefore affect all aspects of the weighing
operation.
5.4.1. FM Filter Mode
This command defines the filter mode. Choose the filter mode for your application.
Permitted values are ‘0’ for IIR filter and ‘1’ for FIR filter.
Request: FM=0 (IIR Filter).
Setup: FM=1 (FIR Filter).
The IIR filter operates as 2
nd
order low pass filter with Butterworth characteristics. The attenuation
is 40dB/decade (12 dB/octave). The digital FIR filter works as a low-pass filter with quick response
(see Mode Characteristics tables).
Factory Default: 0 [IIR filter].
5.4.2. FL Filter setting
This command defines the -3dB filter cut-off frequency.
The permitted settings are from 0 to 8 (see Mode Characteristics tables).
Factory Default: 3 [Filter 3].
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