Endress+Hauser Proline Prowirl 73 - Page 120

Description of device functions Proline Prowirl 73
120 Endress+Hauser
VALUE 4 mA Description
Use this function to assign a value to the 4 mA current.
The value must be smaller than the value entered in the VALUE 20 mA function
(ä 120).
User input
5-digit floating-point number
Factory setting
See the parameter printout provided. The parameter printout is an integral part of these
Operating Instructions.
VALUE 20 mA Description
Use this function to assign a value to the 20 mA current.
User input
5-digit floating-point number
Factory setting
See the parameter printout provided. The parameter printout is an integral part of these
Operating Instructions.
TIME CONSTANT Description
In selecting the time constant, you define how the current output signal reacts to severely
fluctuating measured variables, either very quickly (low time constant) or with damping
(high time constant).
The reaction time of the function also depends on the time specified in the FLOW
DAMPING function (ä 170).
User input
Fixed-point number: 0 to 100 s
Factory setting
5 seconds
FAILSAFE MODE Description
Use this function to specify the response of the current output in the event of an error.
The dictates of safety render it advisable to ensure that the current output assumes a
predefined state in the event of a 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 SPAN function (ä 119).
If the current span is:
4 to 20 mA HART NAMUR  output current = 3.6 mA
4 to 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
ACTUAL CURRENT Description
The current computed actual value of the output current appears on the display.
Display
3.60 to 22.60 mA
Function description, CURRENT OUTPUT group