Page 17
FW-F018-P-M_v0404_01_EN.docx
3.3.6
EXPLANATION OF SETUP-MENU 5 - FLOWMETER
The F018-P is able to handle several types of input signal. The type of flowmeter pickup / signal is
selected with SETUP 5.1. Read also paragraph 4.6.1 Terminals 1-3: Flowmeter input.
SETUP
FUNCTIONS
AND
VARIABLES
5
FLOWMETER
5.1
SIGNAL
TYPE OF SIGNAL
EXPLANATION
RESISTANCE
FREQ. / mV
REMARK
NPN
NPN input
100
kΩ pull
-up
6 kHz.
(open collector)
NPN - LP
NPN input with
low pass filter
100
kΩ pull
-up
1.2 kHz.
(open collector)
less sensitive
REED
Reed-switch input
1
mΩ pull
-up
600 Hz.
REED - LP
Reed-switch input
with low pass
filter
1
mΩ pull
-up
120 Hz.
Less sensitive
PNP
PNP input
47
kΩ pull
-down
6 kHz.
PNP - LP
PNP input with
low pass filter
100
kΩ pull
-down
1.2 kHz.
Less sensitive
NAMUR
Namur input
820
Ω pull
-down
4 kHz.
External power
required
COIL HI
High sensitive coil
input
-
20 mV p.t.p.
Sensitive for
disturbance!
COIL LO
Low sensitive coil
input
-
90 mV p.t.p.
Normal sensitivity
ACTIVE
Active pulse input
detection level
1.2V DC
47
kΩ
10 kHz.
External power
required
3.3.7
EXPLANATION OF SETUP-MENU 6 - LINEARIZATION
The linearization function is available to approach the real flow curve better as with the general K-
factor (KF0) entered with setup 1.4 and 2.4. This to obtain a more accurate flow rate, total and
accumulated total as well as a pulse output at any flowmeter frequency.
A maximum of 8 linearization-positions can be entered while the interpolation will calculate any other
position in-between.
For each linearization position, the frequency and a Meter Factor (MF) must be entered.
The Meter Factor for each frequency is calculated with following formula:
Meter Factor =
K-Factor at Flow rate X
KF0
The lowest frequency and MF you enter will be valid from 0Hz. The highest frequency and MF will
be valid till 10KHz. It is advised to enter the frequencies in increasing order, however it is not
necessary. Please have a look at following example to understand the method of linearization.
