Fluidwell E126-P-EG, Руководство пользователя

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User Manual E126-P-EG
Page 26 FW_E126-P-EG_M_v0301-01_EN
● measurement units are not supported, i.e. ‘revolutions’, or
● volume and mass units are used simultaneously.
Use the following procedure to set up the automatic unit conversion:
1.
4.1: FLOWMETER > SIGNAL
: Select the correct type of flowmeter signal.
2.
4.2: FLOWMETER > UNITS
: Select the type of measurement unit (volume or mass) shown on the
certificate.
3.
4.3: FLOWMETER > UNIT
: Select the measuring unit shown on the certificate.
4.
4.4: FLOWMETER > K-FACTOR
: Enter the (average) K-factor shown on the certificate.
5.
1.1: TOTAL > UNIT
: Select the desired measuring units for (accumulated) Total.
6.
2.1: FLOWRATE > UNIT
: Select the desired measuring units for Flowrate.
For a detailed description and tutorials on the automatic unit conversion feature, refer to our website
(or ask your supplier).
Example : How to manually calculate the K-factor for total or flowrate:
● The Flowmeter generates 65.231 pulses per US gallon.
● The required measurement unit is cubic feet (ft
3
).
● A cubic foot = 7.48052 gallons.
Formula
Pulse per US gallon x cubic foot (in gallons) = K-factor
65.231 x 7.48052 = 487.9618
For this example, enter 487.9618 as the K-factor for total or flowrate.
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 [»49]
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