FW_F112A_v1702_02_EN
Page 11
3.1.2.
EXPLANATION OF SETUP-MENU 1 - TOTAL
UNIT
11
This setting is used to select the engineering unit for the indication of the total, the
accumulated total and the pulse output.
When you change the engineering unit , you must recalculate and reprogram the
span for the (accumulated) total. When you recalculate and reprogram the span, the
history for (accumulated) total is not correct anymore, because the (accumulated)
total is not recalculated. For future reference, best practice is to make a note of the
accumulated total before you program the recalculated span.
DECIMALS
12
This setting is used to set the amount of digits behind the decimal point for the
(accumulated) total indication.
SPAN
13
This setting is used to set the span for the total. With the span, the
flowmeter signal is converted to a quantity. The span for Total is based on
the engineering unit (SETUP 11) and the flow rate per second at 20mA
(or max signal). Enter the span with the decimals (decimals are not shown
yet and are set in SETUP 14). The more accurate the span, the more
accurate the functioning of the system will be.
0B
Example 1: Calculating the Span.
Assume that the flowmeter generates 20mA at a rate of 652.31 USGAL per hour,
the selected unit is barrels. There are 42 gallons in one barrel; so the rate is
652.31/42 is 15.53119 barrels/hour. This is 0.0043142 barrels/second, which is
the span. Enter for
the span
: "004314" and for
the span decimals
"6".
0B
Example 2: Calculating the Span.
Assume that the flowmeter generates 20mA at a flow rate of 2,481.3 Liters/minute
and the selected unit is "
m
3
". The rate per second is 2,481.3÷60 is 41.355 L/sec.
This is 0.041355 m3/sec., which is the span.
Enter for
the span
: "041355" and for
the span decimals
"6".
When you recalculate and enter a new span, the history for
(accumulated) total is not correct anymore, because the
(accumulated) total is not recalculated. for future reference. Best
practice is to make a note of the accumulated total before you enter
the recalculated span.
DECS SPAN
14
This setting is used to set the amount of digits behind the decimal point for the
span.
3.1.3.
EXPLANATION OF SETUP-MENU 2 - FLOW RATE
The settings for total and flow rate are entirely separate. In this way, different engineering units can
be used for each e.g. cubic meters for total and liters for flow rate.
UNIT
21
This setting is used to select the engineering unit for the indication of the flow rate.
Alteration of the engineering unit will have consequences for
operator and setup values, they will not be automatically recalculated
to the value of the new selected unit. The span has to be adapted as
well; the calculation is not done automatically.
TIME
22
This setting is used to set the time unit for the flow rate calculation. Note that the
flow rate is given in engineering unit/time unit, e.g. liters/minute (l/min).
When you change this setting, also recalculate and change the settings for
the analog rate-min and analog rate-max.
DECIMALS
23
This setting is used to set the amount of digits behind the decimal point for the flow
rate indication.
SPAN
24
This setting is used to set the span for the total. With the span, the
flowmeter signal is converted to a quantity. The span for Total is based on
the engineering unit (SETUP 21) and the flow rate per second at 20mA (or
max signal). Enter the span with the decimals (decimals are not shown yet
and are set in SETUP 25). The more accurate the span, the more accurate
the functioning of the system will be.
DECS SPAN
25
This setting is used to set the amount of digits behind the decimal point for the
span.
