HF110AEN_v0501_04
Page 14
2 - FLOWRATE
The settings for total and flowrate are entirely separate. In this way, different units of measurement
can be used for each e.g. cubic meters for total and liters for flowrate.
The display update time for flowrate is one second or more.
Note:
these settings also
influence
the analog output.
MEASUREMENT UNIT
21
SETUP - 21 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 Span has to be adapted as well; the calculation is not
done automatically.
TIME UNIT
22
The flowrate can be calculated per second (SEC), minute (MIN), hour
(HR) or day (DAY).
DECIMALS
23
This setting determines for flowrate the number of digits following the
decimal point. The following can be selected:
00000 - 1111.1 - 2222.22 - 3333.333
SPAN
24
With the span, the flowmeter signal is converted to a quantity.
The
span for flowrate
is determined on the basis of the
selected
measurement unit and time unit
at 20mA (or maximum signal).
Enter the span in whole numbers (decimals are set with SETUP 25).
The more accurate the span, the more accurate the functioning of the
system will be:
Example 1
Calculating the span for flowrate
Let us assume that the flowmeter generates 20mA at a
flowrate of 2,481.3 Liters/minute, the selected unit is
"Liters" and time unit "minute".
The span is 2481.3
Enter for
SETUP
- 24: "248130" and for
SETUP
- 25 -
decimals span "2".
Example 2
Calculating the span for flowrate
Let us assume that the flowmeter generates 20mA at a
rate of 652.31 USGAL per hour, the selected unit is USG
and the time unit is minute.
The span is 652.31 / 60 minutes is 10.87183 (GPM).
Enter for
SETUP
- 24: "108718" and for
SETUP
- 25 "4".
DECIMALS SPAN
25
This setting determines the number of decimals for the Span
(SETUP 24). The following can be selected:
0 - 1 - 2 - 3 - 4 - 5 - 6
Please note that this SETUP - influences the accuracy of the Span
indirectly.
This setting has NO influence on the displayed number of digits for
"flowrate" (SETUP 23)!