FMC Technologies Proline Promass 83 E - Function Description

Issue/Rev. 0.2 (12/12)
Page 70 • MN0M023
7 Block OUTPUTS Device Functions Proline Promass 83
Detailed explanations and
information
(continued)
2. Defined measuring range (m–n): m and n have different signs
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Flow a (—) outside, b (- -) within the measuring range.
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• STANDARD
a (—): The flow components outside the scaled measuring range cannot be taken into
account for signal output.
A fault message is generated (# 351...354, current range) and the current output
responds in accordance with the parameter settings in the function FAILSAFE MODE
(4006).
b (): The current output signal is proportional to the measured variable assigned.
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• SYMMETRY
This option is not available under these circumstances, because the 0_4 mA value and
the 20 mA value have different signs.
• PULSATING FLOW
Flow components outside the measuring range are buffered, balanced and output after
a maximum delay of 60 seconds.
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TIME CONSTANT
(4005)
Use this function to enter a time constant defining how the current output signal reacts to
severely fluctuating measured variables, either very quickly (enter a low time constant) or
with damping (enter a high time constant).
User input:
fixed-point number 0.01...100.00 s
Factory setting:
1.00 s
Function description
OUTPUTS o CURRENT OUTPUT (1...3) o CONFIGURATION
20
0
0
mA
4
Q
➀➁
t
a
b
Q
0
+
+
➀
➁
t
mA
t
mA
S=A
S
A