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FW-F010-P-M_v0404_01_EN.docx
3.3.2
EXPLANATION OF SETUP-MENU 1 - FLOW RATE
The display update time for flow rate is one second or more.
SETUP
FUNCTIONS
AND
VARIABLES
1
FLOW RATE
1.1
UNIT
SETUP 1.1 determines the measurement unit for flow rate.
The following units can be selected:
mL - L - m3 - mg - g - kg - ton - GAL - bbl - lb - cf - REV - ---- (no unit)
- scf - Nm3 - NL - P.
Alteration of the measurement unit will have consequences for
operator and SETUP-level values. Please note that the K-factor has
to be adapted as well; the calculation is not done automatically.
1.2
TIME UNIT
The flow rate can be calculated per second (SEC), minute (MIN), hour
(HR) or day (DAY).
1.3
DECIMALS
This setting determines for flow rate the number of digits following the
decimal point. The following can be selected:
00000 - 1111.1 - 222.22 - 33.333 - 4.4444 - .55555
1.4
K-FACTOR
With the K-factor, the flowmeter pulse signals are converted to a flow
rate. The K-factor is based on the number of pulses generated by the
flowmeter per selected measurement unit (SETUP 1.1), for example
per liter. The more accurate the K-factor, the more accurate the
functioning of the system will be.
Example 1:
Calculating the K-factor.
Let us assume that the flowmeter generates 2.4813 pulses per liter
and the selected unit is "cubic meters / m3". A cubic meter consists of
1000 parts of one liter which implies 2,481.3 pulses per m3. So, the
K-factor is 2,481.3. Enter for SETUP 1.4: "2481300" and for
SETUP 1.5 - decimals K-factor "3".
Example 2:
Calculating the K-factor.
Let us assume that the flowmeter generates 6.5231 pulses per gallon
and the selected measurement unit is gallons. So, the K-Factor is
6.5231. Enter for SETUP 1.4: "6523100" and for SETUP 1.5 decimals
K-factor "6".
1.5
DECIMALS K-FACTOR
This setting determines the number of decimals for the K-factor
(SETUP 2.4). The following can be selected:
0 - 1 - 2 - 3 - 4 - 5 - 6
Please note that this SETUP - influences the accuracy of the K-factor
indirectly. This setting has NO influence on the displayed number of
digits for
“flow rate” (SETUP 1.3)!
1.6
CALCULATION
The flow rate is calculated by measuring the time between a number
of pulses, for example 10 pulses. The more pulses the more accurate
the flow rate will be. The maximum value is 255 pulses.
•
The lower the number of pulses, the higher the power consumption
of the F010-P will be (important for battery powered applications).
•
For low frequency applications (below 10Hz): do not program more
than 10 pulses else the update time will be very slow.
•
For high frequency application (above 1kHz) do program a value of
100 or more pulses.
1.7
CUT-OFF
With this setting, you determine a minimum flow requirement thresh-
hold, if during this time less than XXX-pulses (SETUP 1.6) are
generated, the flow rate will be displayed as zero.
The cut-off time has to be entered in seconds - maximum time is 999
seconds (about 15 minutes).
1.8
GRAPH. MAX
The piegraph gives the Operator an indication of the flowmeter output
value in relation to its measuring range. Enter with this setting, the
maximum flow rate at which value the piegraph will indicate 100%.