FISCHER DE45 R/S Series, Руководство по эксплуатации

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4.3.4 Menu Level Output
Parameter name Description Value range
min. output min. output
0.0 … 21.0 mA or
0.0 … 11.0 V
max. output max. output
Error signal Measuring range unit
The parameters min. output , max. output and error signal define the limits of
the output signal that may not be undercut or exceeded regardless of the pres-
sure. The limit values take priority over the range defined by the
MB start and
MB end parameters! These parameters primarily serve to prevent error mes-
sages in downstream systems caused by brief overstepping of measuring
ranges.
The parameter min. output is usually only used for devices with an output sig-
nal 4…20 mA because frequently values of below 3.8 mA are evaluated as er-
ror signals.
The max. output value can be used for the voltage and current to limit the max-
imum value.
The value defined via the parameter Error signal is issued if the device detects
an internal error and can no longer work correctly. It should be noted here that
not all potential errors and faults can be detected by the device itself.
4.3.5 Menu Level Function
The Function menu level is a variable menu whose appearance depends on the
value of the Function parameter. There are linear, square rooted and table func-
tions
Linear function
The input signal is linear before being sent to the display and the output. The
range defined in the menu "Measuring" serves as the measuring range. If the
function LINEAR is active, the other menu items are cancelled.
Parameter name Description Value range
Function Function Value = linear
Square rooted function
Here, the input signal is square rooted before being sent to the display and the
output. This is necessary e.g. for flow measurements with differential pressure.
A free unit can be defined for the display. To do this, the start and end of the
display range and the number of decimal points are defined. It is also possible
to define the unit with 4 characters.
Parameter name Description Value range
Function Function Value = square
rooted
MB decimal pl. Measuring range
decimal places 1234, 123.4, 12.34,
1,234, 12345, 123456
MB start Measuring range start -9999 … +9999
MB end Measuring range end -9999 … +9999
MB unit Measuring range unit 4 characters
The following section contains descriptions of the parameters MB decimal pl. ,
MB start , MB end and MB unit to describe the table function.