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Setting the low flow cutoff threshold. This function is useful to avoid that flows close to zero, due to the electrical noises
from tiny movements of liquid (due for example to vibrations of the pipe) which cause an increasing of the totalizers.
The allowed range for this function is 0-25% of full scale set. For most applications a value between 0.5 and 1% is
recommended.
This function enables an automatic verification of board’s coefficients. As the converter performs continuously a large
number of tests, we recommend to use this function only in presence of wide range of temperature. Instead it is NOT
recommended to use it when the instrument is used in metering applications (batch).
Enables the automatic change of scale. The meter may have two different working ranges in order to suit to the variable
process conditions. In order to get the best results out of this function it is important range N.2 (Fs2) if enabled is bigger
than N.1 (Fs1). When the flow rate increases and reaches the 100% of the full scale 1, then the meter automatically
switches to scale 2. When the flow rate decreases again reaching a value on scale 2 equal to the 90% of full scale N.1,
then the active scale is 1 again. Allowed values for this parameter: ON/OFF.
Notice: when the autorange is enabled, is not allow to use the manual range change (POS. 6.6 see page 34 ).
This function does NOT increase the accuracy of the measure; its aim is to increase the resolution of 4/20 mA when the
meter work at very low flow rates (typical case the flow rate of water distribution with daytime flow much higher than the
night flow).
(POS. 4.2) Measure Filter CUt-off Threshold
[Cut-off=% xxx]
AL3
[MFCUT]
(POS. 4.3) Auto CAlibration Verify Enable
[Cal.verify=ON]
AL3
[ACAVE]
(POS. 4.4) Auto RaNGe Enable
[Autorange=ON/OFF]
AL3
[ARNGE]
MENU 4 - measure: ONLY MCP FUNCTIONS
Setting the low flow cutoff threshold, it is similar to the function in 4.2. The value of this function is NOT visible on diplay
but only with MCP command.
Measure Filter Cut-off Threshold 2
[MCP ONLY]
AL3
[MFCT2]
Reserved to the service
Reserved to the service
DYNamic Sample Analysis
[MCP ONLY]
AL4
[DYNSA]
DYNamic Sample Time
[MCP ONLY]
AL4
[DYNST]
The HIINP function (INPut High Immunity filter) introduces a hardware filter to be used ONLY IN CASE OF ABSOLUTE
NECESSITY, when the measure is absolutely unstable or it is NOT possible to make the measure, and every possible
attempt to reduce or eliminate the noise do not give a positive result, with particular attention of instrument ground
connection. When this function is activated (HIINP = ON) the measure will be influenced by an unavoidable error
estimated around 1%.
(POS. 4.5) High immunity INPUTS
[H.imm. inp.]
AL4
[HIINP]