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4.3
CUT-OFF
To ignore small flows e.g. leakage or vibration, a low-flow cut-off can
be set as percentage of the full range of 16mA (or 20mA). When the
analog value is less than required with this setting, the signal will be
ignored. The cut-off value can be programmed in the range 0.0 -
99.9%. Below two examples are given.
Formula (SETUP 4.1)
Span
(SETUP 1.4)
Required
cut-off
Cut-off (SETUP 4.3)
Required output
Interpolation
450 L/min
25 L/min
(25/450)*100%=5.5%
16mA*5.5%+4mA=4.88mA
Square root
450 L/min
25 L/min
(25/450)
2
*100%=0.3%
16mA*0.3%+4mA=4.05mA
4.4
TUNE MIN / 4mA
With this setting it is possible to calibrate the input value for (0)4mA
as the signal from the flowmeter might not be exact 4.0mA (or 0.0
mA) at flow rate zero. This function will measure the real output value
at flow zero.
The input loop powered version - type A-PL - requires a signal of at
least 4mA; not lower!
Be very sure that the offered signal is correct before calibration is
executed, as this has major influence on the accuracy of the system
After pressing PROG, three settings can be selected:
▪
CALIBRATE: with this setting, the input will be calibrated with the
actual "(0)4mA" value. After pressing enter, CAL SET will be
displayed as soon as the calibration is completed. From that
moment, the analog value must be more than the calibrated value
before the signal will be processed.
▪
DEFAULT: with this setting, the factory value is re-installed.
▪
CAL SET: to select the last calibrated value.
4.5
TUNE MAX / 20mA
With this setting it is possible to calibrate the input value for 20mA as
the signal from the flowmeter might not be exact 20.0mA at maximum
flow rate. This function will measure the real output value at maximum
flow rate.
Be very sure that the offered signal is correct before calibration is
executed, as this has major influence on the accuracy of the system
After pressing PROG, three settings can be selected:
▪
CALIBRATE: with this setting, the input will be calibrated with the
actual "20mA" value. After pressing enter, CAL SET will be
displayed as soon as the calibration is completed. From that
moment, the analog value must be less than the calibrated value
for reliable measurements.
▪
DEFAULT: with this setting, the factory value is re-installed.
▪
CAL SET: to select the last calibrated value.
3.3.6
EXPLANATION OF SETUP-MENU 5 - OTHERS
SETUP
FUNCTIONS
AND
VARIABLES
5
OTHERS
5.1
TYPE / MODEL
For support and maintenance it is important to have information about
the characteristics of the F011-A.
Your supplier will ask for this information in the case of a serious
breakdown or to assess the suitability of your model for upgrade
considerations.
5.2
SOFTWARE VERSION
5.3
SERIAL NO.
5.4
PASS CODE
All SETUP-values can be pass code protected.
This protection is disabled with value 0000 (zero).
Up to and including 4 digits can be programmed, for example 1234.
5.5
TAGNUMBER
For identification of the F011-A and communication purposes, a
unique tag number of maximum 7 digits can be entered.
