FW_F112A_v1702_02_EN
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FREQUENCY /
M-FACTOR
61 TO 6F
The percentage is shown at the bottom line of the display.
With value 0%, the M-Factor is disabled. The M-Factor (MF) is shown at the
top-line of the display. The minimum value to be entered is 0.000001 and the
maximum value is 9.999999.
The MF is mostly a figure around 1.000000, like 0.945354 or 1.132573 and
always has six decimals, but the decimal separator is not shown.
LINEARIZE
6G
This setting is used to enable or disable the linearization function.
3.1.8.
EXPLANATION OF SETUP MENU 7 - ANALOG
A linear 4-20mA signal (option AB: 0-20mA or option AU: 0-10V) output signal is generated that represents the flow rate.
The settings for the flow rate influence the analog output directly. The relationship between the flow
rate and the analog output is set with the following settings.
OUTPUT
71
If the analog output is not used, select disable to minimize the power
consumption (e.g. save battery life-time).
Option AP: When a power supply is available but the output is disabled, a
3.5mA signal will be generated.
RATE-MIN
72
Enter here the flow rate at which the output should generate the minimum
signal (0)4mA or 0V - in most applications at zero flow. The number of
decimals shown depend upon setup 23. The engineering units/time (e.g.
L/min) are dependent upon setup 21 and 22.
RATE-MAX
73
Enter here the flow rate at which the output should generate the maximum
signal (20mA or 10V) - in most applications at maximum flow. The number
of decimals shown depend upon setup 23. The engineering units/time
(e.g. L/min) are dependent upon setup 21 and 22.
CUT-OFF
74
To ignore leakage of the flow for example, a low flow cut-off can be set as
a percentage of the full range of 16mA, 20mA or 10V.
When the flow is less than the required rate, the current will be the
minimum signal (0)4mA or 0V.
Example:
Calculate the cut-off.
Rate-min: 0L/min [4mA], Rate-max: 100 L/min [16mA], Cut-off: 2%
Required rate [L/min]:
(rate-max - rate-min)*cut-off: (100-0)*2%=2.0L/min
Output [mA]:
rate-min + (rate-max*cut-off): 4+(16*2%)=4.32mA
