11 Description of device functions
Proline Prowirl 72
84
E Hauser
11.2.7
Group CURRENT OUTPUT
Function description CURRENT OUTPUT
CURRENT RANGE
Use this function to define the current range. You can configure the current output either
in accordance with the NAMUR recommendation or for the values common in the
United States.
Options:
4...20 mA HART NAMUR
4...20 mA HART US
Factory setting:
See parameter printout supplied (the parameter printout is an integral part of these
Operating Instructions)
VALUE 20 mA
Use this function to assign the 20 mA current a value.
User input:
5-digit floating-point number
Factory setting:
See parameter printout supplied (the parameter printout is an integral part of these
Operating Instructions)
!
Note!
The appropriate unit is taken from the UNIT FLOW function (see Page 74).
TIME CONSTANT
Use this function to select a time constant defining how the current output signal reacts
to severely fluctuating measured variables, either very quickly (low time constant) or
with damping (high time constant).
User input:
Fixed-point number: 0...100 s
Factory setting:
5 s
!
Note!
The reaction time of the function also depends on the time specified in the FLOW
DAMPING function (see Page 99).
FAILSAFE MODE
The dictates of safety render it advisable to ensure that the current output assumes a
predefined state in the event of a fault. Use this function to define the response of the
current output to fault. The setting you select here affects only the current output. It has
no effect on other outputs or the display (e.g. totalizers).
Options:
MIN. CURRENT
Depends on the option selected in the CURRENT RANGE function (see Page 84). If the
current range is:
4...20 mA HART NAMUR
→
output current = 3.6 mA
4...20 mA HART US
→
output current = 3.75 mA
MAX. CURRENT
22.6 mA
HOLD VALUE
Measured value output is based on the last measured value saved before the error
occurred.
ACTUAL VALUE
Measured value output is based on the current flow measurement. The fault is ignored.
Factory setting:
MAX. CURRENT
Summary of Contents for Proline Prowirl 72
Page 4: ...QUICK SETUP for quick commissioning Proline Prowirl 72 4 Endress Hauser...
Page 20: ...3 Installation Proline Prowirl 72 20 Endress Hauser...
Page 42: ...6 Commissioning Proline Prowirl 72 42 Endress Hauser...
Page 44: ...7 Maintenance Proline Prowirl 72 44 Endress Hauser...
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