Fluidwell E126-P-EL, Manual

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User Manual E126-P-EL
Page 26 FW_E126-P-EL_M_v0301-01_EN
4 FLOWMETER
4.1 SIGNAL Selects the type of flowmeter pickup / signal. The unit can process several
types of input signal. The settings with LP are used to apply a built-in low-
pass filter. Also see
Section 6.4.10: Terminals S1-S3: Flowmeter input [»47]
for more information.
The selections “Active pulse input” offer a pulse detection level of about
50% of the selected active pulse voltage.
FLOWMETER SELECTION CHARACTERISTICS
TYPE OF SIGNAL EXPLANATION RESISTANCE FREQ / mVpp REMARKS
NPN NPN input 100 kΩ pull-up max. 6 kHz. (open collector)
NPN - LP
NPN input
with low pass filter
100 kΩ pull-up max. 2.2 kHz.
(open collector)
less sensitive
REED Reed-switch input 1 MΩ pull-up max. 1.2k Hz
REED - LP
Reed-switch input
with low pass filter
1 MΩ pull-up max. 120 Hz Less sensitive
PNP PNP input 51 kΩ pull-down max. 6 kHz
PNP - LP
PNP input
with low pass filter
51 kΩ pull-down max. 700 Hz Less sensitive
NAMUR NAMUR input 820 Ω pull-down max. 4 kHz
External sensor
power required
COIL HI
Coil input
high sensitivity
-
min. 20 mVpp
Sensitive for
interference!
Type ZF min. 10 mVpp
Type ZG min. 5 mVpp
COIL LO
Coil input
low sensitivity
- min. 90 mVpp Normal sensitivity
8-1 DC
Active pulse input
detection level
3.9 Vdc
3k9 Ω pull-down max. 10 kHz
External power
required
24 DC
Active pulse input
detection level 11 Vdc
3 k Ω pull-down max. 10 kHz
External power
required
4.2 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
4.4: FLOWMETER > K-FACTOR
and
4.3: FLOWMETER > UNIT
to
disappear in the Flowmeter menu. The K-factor must then be set at
SETUP 1.3: TOTAL > K-FACTOR
and menu
2.4: FLOWRATE > K-FACTOR
.
4.3 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 > UNIT
and
2.1: FLOWRATE > UNIT
will automatically change to the
default setting.
●
Changing the flowmeter unit will not change the amount displayed for
Total and Accumulated Total.
4.4 K-FACTOR Converts the flowmeter pulse signals to a quantity. The K-factor is based on
the number of pulses generated by the flowmeter per measurement unit
selected in
4.3: 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.