HF010PEN_v0403_03 Atex_IECEx_CSA_FM
Page 12
3.2.3.
EXPLANATION OF SETUP-FUNCTIONS
1 - FLOWRATE
MEASUREMENT UNIT
11
SETUP - 11 determines the measurement unit for flowrate.
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.
TIME UNIT
12
The flowrate can be calculated per second (SEC), minute (MIN), hour
(HR) or day (DAY).
DECIMALS
13
This setting determines for flowrate the number of digits following the
decimal point. The following can be selected:
00000 - 1111.1 - 222.22 - 333.333 - 4.4444 - .55555
K-FACTOR
14
With the K-factor, the flowmeter pulse signal is converted to a flowrate.
The K-factor is based on the number of pulses generated by the
flowmeter per selected measurement unit (SETUP 11), 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 - 14:
"24813" and for SETUP - 15 - decimals K-factor "1".
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 - 14: "65231" and for
SETUP - 15 decimals K-factor "4".
DECIMALS K-FACTOR
15
This setting determines the number of decimals for the K-factor
(SETUP 14). The following can be selected:
0 - 1 - 2 - 3 - 4 - 5
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 "flowrate" (SETUP 13)!
CALCULATION
16
The flowrate is calculated by measuring the time between a number of
pulses, for example 10 pulses. The more pulses the more accurate the
flowrate will be. The maximum value is 255 pulses.
Note: the lower the number of pulses, the higher the power consumption
of the unit will be (important for battery powered applications).
Note: for low frequency applications (below 10Hz): do not program more
than 10 pulses else the update time will be very slow.
Note: for high frequency application (above 1kHz) do program a value of
100 or more pulses.
CUT-OFF TIME
17
With this setting, you determine a minimum flow requirement thresh-hold,
if during this time less than XXX-pulses (SETUP 26) are generated, the
flowrate will be displayed as zero.
The cut-off time has to be entered in seconds - maximum time is 999.9
seconds.
GRAPH. MAX.
18
The piegraph gives the Operator an indication of the flowmeter output
value in relation to its measuring range. Enter with this setting, the
maximum flowrate at which value the piegraph will indicate 100%.
