E115-P
User Manual
FW_E115-P_M_v0301-01_EN
Page 27
6
FLOWMETER
6.4 CALCULATE
If bi-directional measurement is enabled (
6.3: FLOWMETER > BI-DIRECTIONAL
),
use this setting to select the method of calculation:
Add
:
●
Forward flow will be interpreted as positive flow. Differential Total,
accumulated Total will count up.
●
Reverse flow will be interpreted as positive flow. Differential Total,
accumulated Total will count up.
Diff
:
●
Forward flow will be interpreted as positive flow. Differential Total,
accumulated Total will count up.
●
Reverse flow will be interpreted as
negative
flow. Differential Total,
accumulated Total will
count down
.
Not Neg
:
●
Forward flow will be interpreted as positive flow. Differential Total,
accumulated Total will count up.
●
Reverse flow will be interpreted as zero flow. Differential Total,
accumulated Total will
not count
.
Accumulated Totals A and B will always count up if enabled in
5.2: DISPLAY >
DAY TOTALS
.
6.5 K-FACTOR
Determines if signal A and signal B use the same K‑Factor (SINGLE) or
different K‑Factors for each pickup (DUAL).
When SINGLE is selected,
3: TOTAL B
and
4: FLOWRATE B
are not accessible.
6.6 UNITS
Enables automatic unit conversion for volumetric flows or mass flows.
When
Hand
is selected, automatic unit conversion is disabled.
To make use of automatic unit conversion, Total and Flowrate must
have a convertible unit. If this is not possible, Hand should be chosen.
This will cause
6.8: FLOWMETER > K-FACTOR A
and
6.7: FLOWMETER > UNIT
to
disappear in the Flowmeter menu. The K-factor must then be set at
SETUP
1.3: TOTAL A > K-FACTOR
and menu
2.4: FLOWRATE A > K-FACTOR
.
6.7 UNIT
Determines the measurement unit for the flowmeter. When automatic unit
conversion is used, the units for Total and Flowrate are derived from this
setting.
●
If the type of measurement unit is changed (volumetric or mass),
1.1: TOTAL A > UNIT
and
2.1: FLOWRATE A > UNIT
will automatically change to
the default setting.
●
Changing the flowmeter unit will not change the amount displayed for
Total and Accumulated Total.
6.8 K-FACTOR A
Converts the flowmeter pulse signals of pickup A to a quantity. The K-factor
is based on the number of pulses generated by the flowmeter per
measurement unit selected in
6.7: FLOWMETER > UNIT
.
The more accurate the K-factor, the more accurate the system.
After pressing PROG, the decimal point will start to flash. The decimal
position can then be changed by pressing the SELECT-key, then press the
CLEAR key to set the digits.
6.9 K-FACTOR B
Converts the flowmeter pulse signals of flowmeter B to a quantity. The K-
factor is based on the number of pulses generated by the flowmeter per
measurement unit selected in
6.7: FLOWMETER > UNIT
.
The more accurate the Flowmeter > K-factor, the more accurate the
system.
After pressing PROG, the decimal point will start to flash. The decimal
position can then be changed by pressing the SELECT-key, then press the
CLEAR key to set the digits.
5.5.7
MENU 7: ANALOG OUTPUT
An analog 4-20 mA signal is generated according to the flowrate with a 12 bits resolution. The
settings for Flowrate influence the analog output directly and should be configured first. The
relationship between rate and analog output is set with the following functions.