Proline Prowirl 73 Description of device functions
Endress+Hauser 123
END VALUE
FREQUENCY
Prerequisite
The function is only available if FREQUENCY was selected in the OPERATION MODE
function (ä 122).
Description
Use this function to specify an end value frequency for the frequency output. The
associated measured value of the measuring range is specified in the VALUE f HIGH
function (ä 123).
The output signal is symmetrical in the FREQUENCY operating mode
(on/off ratio = 1:1).
Example:
End frequency = 1000 Hz, VALUE f HIGH. = 1000 kg/h: i.e. a frequency of 1000 Hz is
output at a flow of 1000 kg/h.
End frequency = 1000 Hz, VALUE f HIGH. = 3600 kg/h: i.e. a frequency of 1000 Hz is
output at a flow of 3600 kg/h.
User input
5-digit fixed point number: 2 to 1000 Hz
Factory setting
1000 Hz
VALUE f LOW Prerequisite
The function is only available if FREQUENCY was selected in the OPERATION MODE
function (ä 122).
Description
Use this function to assign a value to the start frequency.
The value entered here must be smaller than the value assigned to the VALUE f HIGH
(ä 123). A negative value is only permitted if TEMPERATURE is selected in the
ASSIGN FREQUENCY function (ä 122). The desired span is defined by specifying
the VALUE f LOW and VALUE f HIGH. The appropriate unit is taken from the SYSTEM
UNITS (ä 102) or MEASURING VALUES (VELOCITY) group.
User input
5-digit floating-point number
Factory setting
Depends on the option selected in the ASSIGN FREQUENCY function.
– 0 [UNIT VOLUME FLOW]
–0 °C (converted to the UNIT TEMPERATURE)
– 0 [UNIT MASS FLOW]]
– 0 [UNIT CORRECTED VOLUME FLOW]]
– 0 [UNIT HEAT FLOW]
–0 [VELOCITY]
– 0 [UNIT PRESSURE]
VALUE f HIGH Prerequisite
The function is only available if FREQUENCY was selected in the OPERATION MODE
function (ä 122).
Description
Use this function to assign a value to the end frequency.
The value entered here must be larger than the value assigned to the VALUE f LOW
(ä 123). A negative value is only permitted if TEMPERATURE is selected in the
ASSIGN FREQUENCY function (ä 122). The desired span is defined by specifying
the VALUE f LOW and VALUE f HIGH. The appropriate unit is taken from the SYSTEM
UNITS (ä 102) or MEASURING VALUES (VELOCITY) group.
User input
5-digit floating-point number
Factory setting
Depends on the option selected in the ASSIGN FREQUENCY function.
– 10 l/s (converted to the UNIT VOLUME FLOW)
– 200 °C (converted to the UNIT TEMPERATURE)
– 10 kg/h (converted to the UNIT MASS FLOW)
– 10 Nm³/h (converted to the UNIT CORRECTED VOLUME FLOW)
– 10 kW (converted to the UNIT HEAT FLOW)
–
10 m/s (converted to the unit of VELOCITY)
– 10 bara (converted to the UNIT PRESSURE)
Function description, PULSE, FREQUENCY, STATUS group
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