Endress+Hauser Proline Prowirl 72, Руководство по эксплуатации

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11 Description of device functions Proline Prowirl 72
98 E Hauser
ON-VALUE LOW FLOW
CUT OFF Use this function to enter the on-value for low flow cut off.
Low flow cut off is on if the value entered is not equal to 0. As soon as the low flow cut
off is active, an inverted plus sign is shown on the display.
User input:
5-digit floating-point number
Factory setting:
Below the standard measuring range
!
Note!
• The appropriate unit is taken from the UNIT FLOW function (see Page 74).
• The on-value can be set at a value corresponding to a Reynolds number of
Re = 20,000. This has the effect that measurements in the non-linear range are not
evaluated. The Reynolds number and the flow (at Reynolds number = 20,000) can be
determined using the Hauser “Applicator” software.
The Applicator is software for selecting and planning flowmeters. The values required
can be determined without having to connect the transmitter beforehand. The
“Applicator” is available both via the Internet (www.applicator.com) and on a CD-
ROM for local PC installation.
OFF-VALUE LOW FLOW
CUT OFF Use this function to enter the off-value for low flow cut off.
Enter the off-value as a positive hysteresis from the on-value.
User input:
Integer 0...100%
Factory setting:
50%
Example:
A0001245
Q = Flow [volume/time]
t = Time
a = ON-VALUE LOW FLOW CUT OFF = 20 m³/h
b = OFF-VALUE LOW FLOW CUT OFF = 10%
c = Low flow cut off active
1 = Low flow cut off is switched on at 20 m³/h
2 = Low flow cut off is switched off at 22 m³/h
H = Hysteresis
Function description PROCESS PARAMETER
1
c c
Q
t
1
2
b
a
2
H